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Alves de Oliveira E, Cavalheiro da Silva L, Antônio de Andrade E, Dênis Battirola L, Lopes Tortorela de Andrade R. Emilia fosbergii Nicolson, a novel and effective accumulator for phytoremediation of mercury-contaminated soils. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2024; 26:1076-1086. [PMID: 38059299 DOI: 10.1080/15226514.2023.2288906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Soil contamination by toxic metals threatens global public health, highlighting the need for cost-effective and ecologically sound site remediation. In this study, we assessed phytoremediation of Hg-contaminated soils by Emilia fosbergii Nicolson (Asteraceae). Pot experiment was conducted using a substrate of sand and vermiculite (1:1 volume ratio), treatments consisted of five Hg concentrations (0, 1, 3, 5, and 7 mg kg-1). Metal transfer rates were calculated, including accumulation (BAF), translocation (TF) and bioconcentration (BCF) factors. E. fosbergii roots exhibited greater Hg accumulation than other tissues, but biomass production and plant health were not significantly affected at the concentrations tested, as indicated by elongation factors and tolerance index. The results revealed BAF values between 2.18 and 7.14, TF values ranged between 0.15 and 0.52, and the BCF index varied between 8.97 and 26.58. Treatments with Hg content of 5 mg kg-1 and 7 mg kg-1 recorded the highest total Hg concentrations of 66 mg kg-1 and 65.53 mg kg-1 (roots), and 9.18 mg kg-1 and 33.88 mg kg-1 (aerial), respectively. E. fosbergii demonstrated promise for Hg phytoremediation due to its high accumulation capacity, indicated by regular TF and high BCF and BAF indexes, thus classifying it as a high Hg accumulator.
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Affiliation(s)
- Evandro Alves de Oliveira
- Institute of Natural, Human and Social Sciences Graduate Program in Environmental Sciences, Federal University of Mato Grosso, Mato Grosso, Brazil
| | - Larissa Cavalheiro da Silva
- Institute of Natural, Human and Social Sciences Graduate Program in Environmental Sciences, Federal University of Mato Grosso, Mato Grosso, Brazil
| | - Ednaldo Antônio de Andrade
- Institute of Natural, Human and Social Sciences Graduate Program in Environmental Sciences, Federal University of Mato Grosso, Mato Grosso, Brazil
| | - Leandro Dênis Battirola
- Institute of Natural, Human and Social Sciences Graduate Program in Environmental Sciences, Federal University of Mato Grosso, Mato Grosso, Brazil
| | - Ricardo Lopes Tortorela de Andrade
- Institute of Natural, Human and Social Sciences Graduate Program in Environmental Sciences, Federal University of Mato Grosso, Mato Grosso, Brazil
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2
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Ghumman AS, Shamsuddin R, Alothman ZA, Waheed A, Aljuwayid AM, Sabir R, Abbasi A, Sami A. Amine-Decorated Methacrylic Acid-based Inverse Vulcanized Polysulfide for Effective Mercury Removal from Wastewater. ACS OMEGA 2024; 9:4831-4840. [PMID: 38313525 PMCID: PMC10832004 DOI: 10.1021/acsomega.3c08361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/15/2023] [Accepted: 01/04/2024] [Indexed: 02/06/2024]
Abstract
Mercury [Hg(II)] contamination is an indefatigable global hazard that causes severe permanent damage to human health. Extensive research has been carried out to produce mercury adsorbents; however, they still face certain challenges, limiting their upscaling. Herein, we report the synthesis of a novel amine-impregnated inverse vulcanized copolymer for effective mercury removal. Poly(S-MA) was prepared using sulfur and methacrylic acid employing the inverse vulcanization method, followed by functionalization. The polyethylenimine (PEI) was impregnated on poly(S-MA) to increase the adsorption active sites. The adsorbent was then characterized byusing Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). FTIR spectroscopy confirmed the formation of the copolymer, and successful impregnation of PEI and SEM revealed the composite porous morphology of the copolymer. Amine-impregnated copolymer [amine@poly(S-MA)] outperformed poly(S-MA) in mercury as it showed 20% superior performance with 44.7 mg/g of mercury adsorption capacity. The adsorption data best fit the pseudo-second-order, indicating that chemisorption is the most effective mechanism, in this case, indicating the involvement of NH2 in mercury removal. The adsorption is mainly a monolayer on a homogeneous surface as indicated by the 0.76 value of Redlich-Peterson exponent (g), which describes the adsorption nature advent from the R2 value of 0.99.
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Affiliation(s)
- Ali Shaan
Manzoor Ghumman
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia
- HICoE,
Centre for Biofuel and Biochemical Research (CBBR), Institute of Self-Sustainable
Building, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Rashid Shamsuddin
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia
- HICoE,
Centre for Biofuel and Biochemical Research (CBBR), Institute of Self-Sustainable
Building, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Zeid A. Alothman
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Ammara Waheed
- Department
of Chemical Engineering, Wah Engineering College, University of Wah, Wah Cantt 47040, Punjab, Pakistan
| | - Ahmed M. Aljuwayid
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Rabia Sabir
- Department
of Chemical Engineering, Wah Engineering College, University of Wah, Wah Cantt 47040, Punjab, Pakistan
| | - Amin Abbasi
- Technology
University of the Shannon (TUS), County
Westmeath, Athlone N37 HD68, Ireland
| | - Abdul Sami
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia
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3
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Zhang Y, Wu X, Dong Y, Liu J. Quantitative risk analysis of sediment heavy metals using the positive matrix factorization-based ecological risk index method: a case of the Kuye River, China. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:50. [PMID: 38227205 DOI: 10.1007/s10653-023-01836-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 12/13/2023] [Indexed: 01/17/2024]
Abstract
Identifying the sources of heavy metals (HMs) in river sediments is crucial to effectively mitigate sediment HM pollution and control its associated ecological risks in coal-mining areas. In this study, ecological risks resulting from different pollution sources were evaluated using an integrated method combining the positive matrix factorization (PMF) and the potential ecological risk index (RI) model. A total of 59 sediment samples were collected from the Kuye River and analyzed for eight HMs (Zn, Cr, Ni, Cu, Pb, As, Cd, and Hg). The obtained results showed that the sediment HM contents were higher than the corresponding soil background values in Shaanxi Province. The average sediment Hg content was 3.42 times higher than the corresponding background value. The PMF results indicated that HMs in the sediments were mainly derived from industrial, traffic, agricultural, and coal-mining sources. The RI values ranged from 26.15 to 483.70. Hg was the major contributor (75%) to the ecological risk in the vicinity of the Yanjiata Industrial Park. According to the PMF-based RI model, coal-mining activities exhibited the strongest impact on the river ecosystem (48.79%), followed, respectively, by traffic (34.41%), industrial (12.70%), and agricultural (4.10%) activities. These results indicated that the major anthropogenic sources contributing to the HM contents in the sediments are not necessarily those posing the greatest ecological risks. The proposed integrated approach in this study was useful in evaluating the ecological risks associated with different anthropogenic sources in the Kuye River, providing valuable suggestions for reducing sediment HM pollution and effectively protecting river ecosystems.
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Affiliation(s)
- Yaning Zhang
- School of Civil Engineering, Yulin University, Yulin, 719000, China
| | - Xijun Wu
- School of Civil Engineering, Yulin University, Yulin, 719000, China.
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China.
| | - Ying Dong
- School of Civil Engineering, Yulin University, Yulin, 719000, China
| | - Jing Liu
- School of Civil Engineering, Yulin University, Yulin, 719000, China
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4
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Huang Y, Yi J, Li X, Li F. Transcriptomics and physiological analyses reveal that sulfur alleviates mercury toxicity in rice (Oryza sativa L.). J Environ Sci (China) 2024; 135:10-25. [PMID: 37778787 DOI: 10.1016/j.jes.2023.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/25/2022] [Accepted: 01/02/2023] [Indexed: 10/03/2023]
Abstract
Mercury (Hg) is one of the most dangerous contaminants and has sparked global concern since it poses a health risk to humans when consumed through rice. Sulfur (S) is a crucial component for plant growth, and S may reduce Hg accumulation in rice grains. However, the detailed effects of S and the mechanisms underlying S-mediated responses in Hg-stressed rice plants remain unclear. Currently, to investigate the effects of S addition on rice growth, Hg accumulation, physiological indexes, and gene expression profiles, rice seedlings were hydroponically treated with Hg (20 µmol/L HgCl2) and Hg plus elemental sulfur (100 mg/L). S application significantly reduced Hg accumulation in Hg-stressed rice roots and alleviated the inhibitory effects of Hg on rice growth. S addition significantly reduced Hg-induced reactive oxygen species generation, membrane lipid peroxidation levels, and activities of antioxidant enzymes while increasing glutathione content in leaves. Transcriptomic analysis of roots identified 3,411, 2,730, and 581 differentially expressed genes in the control (CK) vs. Hg, CK vs. Hg + S, and Hg vs. Hg + S datasets, respectively. The pathway of S-mediated biological metabolism fell into six groups: biosynthesis and metabolism, expression regulation, transport, stimulus response, oxidation reduction, and cell wall biogenesis. The majority of biological process-related genes were upregulated under Hg stress compared with CK treatment, but downregulated in the Hg + S treatment. The results provide transcriptomic and physiological evidence that S may be critical for plant Hg stress resistance and will help to develop strategies for reduction or phytoremediation of Hg contamination.
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Affiliation(s)
- Yingmei Huang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jicai Yi
- College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Xiaomin Li
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
| | - Fangbai Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
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Veeraswamy D, Subramanian A, Mohan D, Ettiyagounder P, Selvaraj PS, Ramasamy SP, Veeramani V. Exploring the origins and cleanup of mercury contamination: a comprehensive review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-30636-z. [PMID: 37964142 DOI: 10.1007/s11356-023-30636-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 10/19/2023] [Indexed: 11/16/2023]
Abstract
Mercury is a global pollutant that poses significant risks to human health and the environment. Natural sources of mercury include volcanic eruptions, while anthropogenic sources include industrial processes, artisanal and small-scale gold mining, and fossil fuel combustion. Contamination can arise through various pathways, such as atmospheric deposition, water and soil contamination, bioaccumulation, and biomagnification in food chains. Various remediation strategies, including phytoremediation, bioremediation, chemical oxidation/reduction, and adsorption, have been developed to address mercury pollution, including physical, chemical, and biological approaches. The effectiveness of remediation techniques depends on the nature and extent of contamination and site-specific conditions. This review discusses the challenges associated with mercury pollution and remediation, including the need for effective monitoring and management strategies. Overall, this review offers a comprehensive understanding of mercury contamination and the range of remediation techniques available to mitigate its adverse impacts.
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Affiliation(s)
- Davamani Veeraswamy
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
- College of Engineering, Science and Environment, Global Centre for Environmental Remediation (GCER), ATC Building, The University of Newcastle, Callaghan Campus, Callaghan, NSW, 2308, Australia
| | - Arulmani Subramanian
- Department of Chemistry, Bannari Amman Institute of Technology, Sathyamangalam, 638 401, Tamil Nadu, India.
| | - Deepasri Mohan
- Division of Environmental Sciences, Sher-E-Kashmir University of Agricultural Sciences and Technology, Shalimar, 190025, Jammu and Kashmir Union Territory, India
| | - Parameswari Ettiyagounder
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
| | - Paul Sebastian Selvaraj
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
- College of Engineering, Science and Environment, Global Centre for Environmental Remediation (GCER), ATC Building, The University of Newcastle, Callaghan Campus, Callaghan, NSW, 2308, Australia
| | - Sangeetha Piriya Ramasamy
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
- School of Water, Energy, and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Venkatesan Veeramani
- Department of Civil Engineering, University College of Engineering, Anna University, Ariyalur, 621 731, Tamil Nadu, India
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Pourbadiei B, Eftekhari-Sis B, Kordzadeh A, Pourjavadi A. Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media. Heliyon 2023; 9:e21674. [PMID: 38034750 PMCID: PMC10682545 DOI: 10.1016/j.heliyon.2023.e21674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/20/2023] [Accepted: 10/25/2023] [Indexed: 12/02/2023] Open
Abstract
Hg and Cd are the two most toxic heavy metal ions that could be found in aqueous solutions. In this study, a chemosensor based on 5-(4-((4-nitrophenyl) diazenyl) phenyl)-1,3,4-oxadiazole-2-thiol (DOT) was reported to detect these ions simultaneously. DOT showed high selectivity towards Hg ion by changing the color of the solution from beige to gold-yellow at different concentrations of Hg ion. In comparison, other relevant metals, such as Li+, Na+, K+, Cs+, Mg2+, Ca2+, Al3+, Fe2+, Ag+, Cu2+, Pb2+, Ni2+, Zn2+, Cr3+, Fe3+, Pb4+, Mn2+, and Cd2+ did not affect the color of the DOT solution as the interfering ions. Despite no changes in the color of DOT solution in the presence of Cd ion, a solution containing DOT-Hg complex was changed from gold-yellow to orange by adding Cd ion, providing an approach for detecting Hg and Cd ion simultaneously with UV-Vis and Fluorescent spectroscopy. DOT exhibited a high association constant with a detection limit of 0.05 μM for Hg and Cd ions in an aqueous solution. The results of quantum mechanics (QM) calculations were also consistent with the experimental observations, which indicated that changes in the band gap could explain the various colors of DOT complex with metal ions.
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Affiliation(s)
- Behzad Pourbadiei
- Department of Chemistry, Sharif University of Technology, Tehran, 11365-9516, Iran
| | | | - Azadeh Kordzadeh
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, 11365-9516, Iran
| | - Ali Pourjavadi
- Department of Chemistry, Sharif University of Technology, Tehran, 11365-9516, Iran
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Ng WL, Ng ISM, Bay LJ, Li H, Chew PCF, Koh SP, Lee KM, Wu Y, Chan SH. Identification and Characterization of Mercury Contamination in Vegetables and Herbs Cultivated on a Commercial Vertical Indoor Farming System with Light-Emitting Diode Lighting: Unveiling an Unusual Food Safety Risk of Some Improperly Manufactured High-Density Agricultural Production Systems. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:13654-13661. [PMID: 37681756 DOI: 10.1021/acs.jafc.3c03038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Artificial grow lights, such as light-emitting diodes (LEDs) and fluorescent grow lights, are commonly used in modern day indoor farming, citing advantages in energy efficiency and a higher controlled environment. However, the use of LEDs poses a risk in mercury contaminations as a result of its production process, specifically LEDs with polyurethane encapsulates that were traditionally produced using mercury resins as a catalyst. A total of 10.0 ppm of mercury was detected in a curly kale sample harvested from an indoor hydroponic vegetable farm, exceeding Singapore Food Regulation's limit of 0.05 ppm. Vegetables, farming inputs, and surface swabs from the affected farm were analyzed using wet acid digestion followed by cold vapor atomic absorption spectroscopy analysis. The investigation found high concentrations of mercury in the LED encapsulant, and the encapsulant material was identified to be polyurethane by Fourier transform infrared spectroscopy and pyrolysis-gas chromatography-mass spectrometry analysis, indicating the source of mercury contamination to be the LED polyurethane encapsulant.
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Affiliation(s)
- Wan Ling Ng
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Ivan Si Ming Ng
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Lian Jie Bay
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Haiyan Li
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Peggy Chui Fong Chew
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Shoo Peng Koh
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Kah Meng Lee
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Yuansheng Wu
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
| | - Sheot Harn Chan
- National Centre for Food Science, Singapore Food Agency, 7 International Business Park, Singapore 609919, Singapore
- Department of Food Science & Technology, National University of Singapore, 2 Science Drive 2, Singapore 117543, Singapore
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Zhang X, Zou G, Chu H, Shen Z, Zhang Y, Abbas MHH, Albogami BZ, Zhou L, Abdelhafez AA. Biochar applications for treating potentially toxic elements (PTEs) contaminated soils and water: a review. Front Bioeng Biotechnol 2023; 11:1258483. [PMID: 37662433 PMCID: PMC10472142 DOI: 10.3389/fbioe.2023.1258483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 08/03/2023] [Indexed: 09/05/2023] Open
Abstract
Environmental pollution with potentially toxic elements (PTEs) has become one of the critical and pressing issues worldwide. Although these pollutants occur naturally in the environment, their concentrations are continuously increasing, probably as a consequence of anthropic activities. They are very toxic even at very low concentrations and hence cause undesirable ecological impacts. Thus, the cleanup of polluted soils and water has become an obligation to ensure the safe handling of the available natural resources. Several remediation technologies can be followed to attain successful remediation, i.e., chemical, physical, and biological procedures; yet many of these techniques are expensive and/or may have negative impacts on the surroundings. Recycling agricultural wastes still represents the most promising economical, safe, and successful approach to achieving a healthy and sustainable environment. Briefly, biochar acts as an efficient biosorbent for many PTEs in soils and waters. Furthermore, biochar can considerably reduce concentrations of herbicides in solutions. This review article explains the main reasons for the increasing levels of potentially toxic elements in the environment and their negative impacts on the ecosystem. Moreover, it briefly describes the advantages and disadvantages of using conventional methods for soil and water remediation then clarifies the reasons for using biochar in the clean-up practice of polluted soils and waters, either solely or in combination with other methods such as phytoremediation and soil washing technologies to attain more efficient remediation protocols for the removal of some PTEs, e.g., Cr and As from soils and water.
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Affiliation(s)
- Xu Zhang
- Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, China
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China
- Shanghai Engineering Research Centre of Low-Carbon Agriculture, Shanghai, China
| | - Guoyan Zou
- Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Shanghai Engineering Research Centre of Low-Carbon Agriculture, Shanghai, China
| | - Huaqiang Chu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| | - Zheng Shen
- National Engineering Research Center of Protected Agriculture, Shanghai Engineering Research Center of Protected Agriculture, Tongji University, Shanghai, China
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| | - Mohamed H. H. Abbas
- Soils and Water Department, Faculty of Agriculture, Soils and Water Department, Benha University, Benha, Egypt
| | - Bader Z. Albogami
- Department of Biology, Faculty of Arts and Sciences, Najran University, Najran, Saudi Arabia
| | - Li Zhou
- Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Shanghai Engineering Research Centre of Low-Carbon Agriculture, Shanghai, China
| | - Ahmed A. Abdelhafez
- Soils and Water Department, Faculty of Agriculture, New Valley University, New Valley, Egypt
- National Committee of Soil Science, Academy of Scientific Research and Technology, Cairo, Egypt
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Ndzana CE, Emmanuel Mvondo VY, Tchouta KD, Ngatcha BN. Assessment of the impact of small-scale mining on soil contamination by mercury and hydrocarbons in the kadey catchment (East Cameroon). Heliyon 2023; 9:e18786. [PMID: 37576211 PMCID: PMC10415891 DOI: 10.1016/j.heliyon.2023.e18786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/15/2023] Open
Abstract
The objective of the present study was to assess soil contamination by mercury and hydrocarbon products used in gold mining in the Kadey catchment area. The results obtained show that gold mining by the small mine is the cause of chemical contamination of the soil caused by hydrocarbon products with concentrations 800 times higher than the threshold value on certain points of the former mining sites. The use of mercury has led to an increase in its concentration to values that are still below the critical thresholds. It also appears from this work that organic matter plays a very important role in the retention of mercury on the soil surface. In the case of hydrocarbons are concerned, although high concentrations above are found exclusively at the surface, the rainfall contributes to their infiltration into the soil and to a horizontal redistribution of the contamination.
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Affiliation(s)
- Charles Eloundou Ndzana
- Ministry of Mines, Industry and Technological Development, Yaounde, Cameroon
- University of Ngaoundéré, Faculty of Science, Department of Earth Sciences, Ngaoundere, Cameroon
| | | | - Kemgang Dongmo Tchouta
- University of Ngaoundéré, Faculty of Science, Department of Earth Sciences, Ngaoundere, Cameroon
| | - Benjamin Ngounou Ngatcha
- University of Ngaoundéré, Faculty of Science, Department of Earth Sciences, Ngaoundere, Cameroon
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Thakuria A, Singh KK, Dutta A, Corton E, Stom D, Barbora L, Goswami P. Phytoremediation of toxic chemicals in aquatic environment with special emphasis on duckweed mediated approaches. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 25:1699-1713. [PMID: 36941761 DOI: 10.1080/15226514.2023.2188423] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The discharge of toxic chemicals into water bodies and their linked detrimental effects on health is a global concern. Phytoremediation, an environment-friendly plant-based technology, has gained intensive interest over the last decades. For the aquatic phytoremediation process, the commonly available duckweeds have recently attracted significant attention due to their capacity to grow in diverse ecological niches, fast growth characteristics, suitable morphology for easy handling of biomass, and capacity to remove and detoxify various potential toxic elements and compounds. This review presents the progress of duckweed-assisted aquatic phytoremediation of toxic chemicals. A brief background of general phytoremediation processes, including the different phytoremediation methods and advances in understanding their underlying mechanisms, has been described. A summary of different approaches commonly practiced to assess the growth of the plants and their metal removal capacity in the phytoremediation process has also been included. A vast majority of studies have established that duckweed is an efficient plant catalyst to accumulate toxic heavy metals and organic contaminants, such as pesticides, fluorides, toxins, and aromatic compounds, reducing their toxicity from water bodies. The potential of this plant-based phytoremediation process for its downstream applications in generating value-added products for the rural economy and industrial interest has been identified.
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Affiliation(s)
- Aparupa Thakuria
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Kundan Kumar Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Arup Dutta
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Eduardo Corton
- Laboratory of Biosensors and Bioanalysis, IQUIBICEN-CONICET and FCEN-UBA, Buenos Aires, Argentina
| | - Devard Stom
- Faculty of Biology and Soil, Irkutsk State University, Irkutsk, Russia
| | - Lepakshi Barbora
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Pranab Goswami
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India
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Monroy-Licht A, Méndez-Cuadro D, Olivero-Verbel J. Elemental mercury accumulation in Eichhornia crassipes (Mart.) Solms-Laubach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:9898-9913. [PMID: 36064851 DOI: 10.1007/s11356-022-22521-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
The aquatic macrophyte Eichhornia crassipes has great potential for the control of Hg pollution in the environment. The aim of this study was to investigate the capability of E. crassipes to accumulate elemental mercury (Hg0). The plants were exposed for 30 days to 5, 10, 20, 40, and 80 mg of Hg0 in a 1-L Hoagland medium with the Hg0 settled at the bottom of the flask. The roots of the plants did not touch the mercury during the treatment. After exposure, the total Hg (T-Hg) concentrations in the roots, leaves, and stems were measured using a direct mercury (Hg) analyzer. The highest concentrations were found at 80 mg Hg0 treatment in the roots, leaves, and stems, in that order. The translocation factor indicated a poor capability of Hg to translocate from the roots to the shoots. The relative growth and the root-length inhibition measurements showed that the differences between Hg0 treatments were not significant. In addition, the treatments negatively affected the chlorophyll concentration. The carotenoid content was found to be significantly different at 20 and 40 mg of Hg0 in 1 L. Regarding the carbonyl index in root proteins, significant differences compared to control were found at the highest Hg treatment. Based on these results, it was shown that E. crassipes is able to take up elemental Hg from Hoagland medium. However, the Hg0 treatments did not show a strong stress-response activation mechanism in the evaluated plant tissues.
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Affiliation(s)
- Andrea Monroy-Licht
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Zaragocilla Campus, 130014, Cartagena, Colombia
- Chemistry and Biology Group, Chemistry and Biology Department, Universidad del Norte, 081007, Barranquilla, Colombia
| | - Darío Méndez-Cuadro
- Analytical Chemistry and Biomedicine Group, Department of Biology, School of Exact and Natural Sciences, University of Cartagena, 130015, Cartagena de Indias, Colombia
| | - Jesus Olivero-Verbel
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Zaragocilla Campus, 130014, Cartagena, Colombia.
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Chen Y, Yang L, Zhang L, Li J, Zheng Y, Yang W, Deng L, Gao Q, Mi Q, Li X, Zeng W, Ding X, Xiang H. Autotoxins in continuous tobacco cropping soils and their management. FRONTIERS IN PLANT SCIENCE 2023; 14:1106033. [PMID: 37139103 PMCID: PMC10149998 DOI: 10.3389/fpls.2023.1106033] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 03/29/2023] [Indexed: 05/05/2023]
Abstract
Tobacco belongs to the family Solanaceae, which easily forms continuous cropping obstacles. Continuous cropping exacerbates the accumulation of autotoxins in tobacco rhizospheric soil, affects the normal metabolism and growth of plants, changes soil microecology, and severely reduces the yield and quality of tobacco. In this study, the types and composition of tobacco autotoxins under continuous cropping systems are summarized, and a model is proposed, suggesting that autotoxins can cause toxicity to tobacco plants at the cell level, plant-growth level, and physiological process level, negatively affecting soil microbial life activities, population number, and community structure and disrupting soil microecology. A combined strategy for managing tobacco autotoxicity is proposed based on the breeding of superior varieties, and this approach can be combined with adjustments to cropping systems, the induction of plant immunity, and the optimization of cultivation and biological control measures. Additionally, future research directions are suggested and challenges associated with autotoxicity are provided. This study aims to serve as a reference and provide inspirations needed to develop green and sustainable strategies and alleviate the continuous cropping obstacles of tobacco. It also acts as a reference for resolving continuous cropping challenges in other crops.
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Affiliation(s)
- Yudong Chen
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
| | - Long Yang
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
- *Correspondence: Long Yang, ; Wanli Zeng, ; Xinhua Ding, ; Haiying Xiang,
| | | | - Jianrong Li
- Yuxi Cigarette Factory, Hongta Tobacco Group Co. Ltd., Yuxi, China
| | - Yalin Zheng
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
| | - Wenwu Yang
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
| | - Lele Deng
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
| | - Qian Gao
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
| | - Qili Mi
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
| | - Xuemei Li
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
| | - Wanli Zeng
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
- *Correspondence: Long Yang, ; Wanli Zeng, ; Xinhua Ding, ; Haiying Xiang,
| | - Xinhua Ding
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
- *Correspondence: Long Yang, ; Wanli Zeng, ; Xinhua Ding, ; Haiying Xiang,
| | - Haiying Xiang
- Technology Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
- *Correspondence: Long Yang, ; Wanli Zeng, ; Xinhua Ding, ; Haiying Xiang,
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13
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Xing Y, Wang J, Kinder CES, Yang X, Slaný M, Wang B, Song H, Shaheen SM, Leinweber P, Rinklebe J. Rice hull biochar enhances the mobilization and methylation of mercury in a soil under changing redox conditions: Implication for Hg risks management in paddy fields. ENVIRONMENT INTERNATIONAL 2022; 168:107484. [PMID: 36049376 DOI: 10.1016/j.envint.2022.107484] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Biochar amendment to paddy soils was promising to mitigate mercury (Hg) accumulation in rice; thus, it was applied to reduce human Hg exposure via rice consumption. However, how biochar affects Hg mobilization and MeHg formation in soil under changed redox potential (Eh) conditions remained unknown. Here, we explored the change of dissolved total Hg (DTHg) and dissolved MeHg (DMeHg), and their controlling biogeochemical factors in a soil with(out) biochar amendment under changing Eh conditions using biogeochemical microcosm. Biochar amendment resulted in a widen Eh range (-300 to 400 mV) compared to the control (-250 to 350 mV), demonstrating that biochar promoted reduction-oxidization reactions in soil. Biochar amendment enhanced Hg mobilization by mediating reductive dissolution of Fe/Mn (hydr)oxides. Thus, the increased Hg availability promoted MeHg formation in the soils. Biochar amendment changed the soil organic matter (SOM) composition. Positive correlations between the relative abundance of LIPID (lipids, alkanes/alkenes), ALKYL (alkylaromatics), and suberin and MeHg concentrations indicate that these SOM groups might be related to MeHg formation. Biochar enhanced the releasing and methylation of Hg by promoting the mobilization of Fe(oxyhydr)oxides and alternation of carbon chemistry under dynamic Eh conditions. There is an unexpected environmental risk associated with biochar application to paddy soils under dynamic Eh condition, and one should be aware this risk when applying biochar aiming to minimize human Hg exposure health risks via rice consumption.
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Affiliation(s)
- Ying Xing
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550002, PR China; University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany
| | - Jianxu Wang
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550082, PR China.
| | - Christoph E S Kinder
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany
| | - Xing Yang
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany
| | - Michal Slaný
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, Slovakia
| | - Bing Wang
- College of Resources and Environment Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Hocheol Song
- University of Sejong, Department of Environment, Energy and Geoinformatics, 98 Gunja-Dong, Guangjin-Gu, Seoul, South Korea
| | - Sabry M Shaheen
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment and Arid Land Agriculture, Department of Arid Land Agriculture, Jeddah 21589, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516 Kafr El-Sheikh, Egypt
| | - Peter Leinweber
- University of Rostock, Department Light, Life and Matter (LLM), Albert-Einstein-Strasse 25, D-18059 Rostock, Germany; Soil Science, University of Rostock, Justus-von-Liebig-Weg 6, 18051 Rostock, Germany
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; University of Sejong, Department of Environment, Energy and Geoinformatics, 98 Gunja-Dong, Guangjin-Gu, Seoul, South Korea.
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Chengatt AP, Sarath NG, Sebastian DP, Mohanan NS, Sindhu ES, George S, Puthur JT. Chelate assisted phytoextraction for effective rehabilitation of heavy metal(loid)s contaminated lands. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2022; 25:981-996. [PMID: 36148488 DOI: 10.1080/15226514.2022.2124233] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The contamination of lands and water by heavy toxic metal(loid)s is an environmental issue that needs serious attention as it poses a major threat to public health. The persistence of heavy metals/metalloids in the environment as well as their potentially dangerous effects on organisms underpins the need to restore the areas contaminated by heavy toxic metal(loid)s. Soil restoration can be achieved through a variety of different methods. Being more cost-effective and environmentally sustainable, phytoremediation has recently replaced traditional processes like soil washing and burning. Many plants have been intensively explored to eliminate various heavy metals from polluted soils through phytoextraction, which is a commonly used phytoremediation approach. The ability of chelants to enhance phytoextraction potential has also received wide attention owing to their ability to elevate the efficiency of plants in removing heavy metal(loid)s. Chelants have been found to improve plant growth and the activity of the defense system. Several chelants, either non-biodegradable or biodegradable, have been reported to augment the phytoextraction efficiencies of various plants. The problem of the leaching of heavy metal(loid)s and secondary pollution caused by non-biodegradable chelants can be overcome by the use of biodegradable chelants to an extent. This review is a brief report focusing on recent articles on chelate-assisted phytoextraction of heavy metal (loids) As, Cd, Cu, Cr, Hg, Ni, Pb, U, and Zn.
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Affiliation(s)
| | - Nair G Sarath
- Plant Physiology and Biochemistry Division, Department of Botany, University of Calicut, Kozhikode, India
| | | | | | - E S Sindhu
- Department of Botany, St. Joseph's College (Autonomous), Kozhikode, India
| | - Satheesh George
- Department of Botany, St. Joseph's College (Autonomous), Kozhikode, India
| | - Jos T Puthur
- Plant Physiology and Biochemistry Division, Department of Botany, University of Calicut, Kozhikode, India
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15
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Li C, Li Y, Cheng H, Jiang C, Zheng L. Remediation of Soil Mercury by Modified Vermiculite-Montmorillonite and Its Effect on the Growth of Brassica chinensis L. Molecules 2022; 27:molecules27165340. [PMID: 36014576 PMCID: PMC9416574 DOI: 10.3390/molecules27165340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/29/2022] [Accepted: 08/16/2022] [Indexed: 01/09/2023] Open
Abstract
In this study, the surface of vermiculite-montmorillonite was modified by MnO2 loading. The modified vermiculite-montmorillonite was added to remediate the potentially toxic trace element (PTE) Hg present in soil containing coal gangue. Pot experiments were conducted to analyze and compare the pH values, Hg contents and Hg species present in coal gangue-containing soil, with and without the modified materials added, to determine whether the addition of modified materials had an effect on the growth of Brassica chinensis L. Results showed that with the addition of 35 g·kg-1 modified vermiculite-montmorillonite, the pH of soil increased by a value of 0.79, compared with that in the control group. When 15 g·kg-1 was added, the concentration of Hg in soil decreased by 98.2%. The addition of modified materials promoted the transformation of Hg in soil from a bioavailable form to an unavailable form; that is, the content of the residual form increased. The plant height and biomass of Brassica chinensis L. also increased, which indicated that the addition of modifiers can increase soil productivity, reduce the effects of PTEs on organisms in soil, and promote plant growth. Therefore, the addition of modified vermiculite-montmorillonite can achieve remediation of coal gangue-containing soil.
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Affiliation(s)
- Chang Li
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, China
| | - Yuchen Li
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, China
| | - Hua Cheng
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, China
| | - Chunlu Jiang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, China
| | - Liugen Zheng
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, China
- Correspondence: ; Tel.: +86-551-63861471
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16
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Garnero PL, Ballesteros ML, Monferran MV, Rivetti NG, Bistoni MA. Multi-biomarker Assessment in a Native Species Psalidodon eigenmanniorum Under Inorganic Mercury and Recovery Scenarios. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 83:142-154. [PMID: 35934735 DOI: 10.1007/s00244-022-00946-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
The increasing contamination of water bodies with mercury raises concerns about its possible effects on aquatic organisms. The combined use of several biomarkers allows researchers to study the impact of a chemical at different levels of biological organization. In the present work, we determined the response of histological (gills and liver), somatic (condition factor and hepato-somatic index), and behavioral (predator-prey relationship, through the presentation of a computer-animated image) biomarkers in the native species Psalidodon eigenmanniorum exposed to 100 µg L-1 of inorganic Hg (IHg) during 96 h. We also assessed whether there was a change in the biomarkers analyzed after 7 days in Hg-free water compared with those exposed to IHg. In exposed fish, IHg caused damage to the gills and liver tissues. The condition factor showed no difference between IHg-exposed organisms and control organisms, while the hepato-somatic index was lower in IHg-exposed fish. As for the behavioral analyses, it was observed that the presentation of a stimulus induced changes in the behavioral responses of fish exposed to IHg, which showed a heightened state of alertness with respect to control. On the other hand, after 7 days in Hg-free water, the organisms generally showed no changes in biomarkers compared with IHg-exposed fish. Our results contribute new data on IHg toxicity in a native species and provide information on the plasticity of damage to reverse itself. Furthermore, this work provides baseline information for environmental assessments in water bodies where mercury is present.
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Affiliation(s)
- Paola L Garnero
- Departamento de Diversidad Biológica y Ecología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina.
- Instituto de Diversidad y Ecología Animal (IDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina.
| | - María L Ballesteros
- Departamento de Diversidad Biológica y Ecología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Diversidad y Ecología Animal (IDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Magdalena V Monferran
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET) and Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Natalia G Rivetti
- Departamento de Diversidad Biológica y Ecología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Diversidad y Ecología Animal (IDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - María A Bistoni
- Departamento de Diversidad Biológica y Ecología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Diversidad y Ecología Animal (IDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
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Robas Mora M, Jiménez Gómez PA, González Reguero D, Probanza Lobo A. Effect of Plant Growth-Promoting Bacteria on Biometrical Parameters and Antioxidant Enzymatic Activities of Lupinus albus var. Orden Dorado Under Mercury Stress. Front Microbiol 2022; 13:891882. [PMID: 35814683 PMCID: PMC9257021 DOI: 10.3389/fmicb.2022.891882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 05/02/2022] [Indexed: 11/30/2022] Open
Abstract
Heavy metal contamination of soils is a large-scale environmental problem. It leads to significant disqualification of the territory, in addition to being a source of the potential risk to human health. The exposure of plants to mercury (Hg) generates responses in its growth and their oxidative metabolism. The impact of increasing concentrations of Hg on the development of Lupinus albus var. Orden Dorado seedlings has been studied, as well as the plant’s response to the maximum concentration of Hg that allows its development (16 μg ml–1). The result shows that only the inoculum with plant growth promoting bacteria (PGPB) allows the biometric development of the seedling (root length, weight, and number of secondary roots) and prevents the toxic effects of the heavy metal from aborting the seedlings. Specifically, treatments with strains 11, 20 (Bacillus toyonensis), 48 (not determined), and 76 (Pseudomonas syringae) are interesting candidates for further PGPB-assisted phytoremediation trials as they promote root biomass development, through their PGPB activities. The plant antioxidant response has been analyzed by quantifying the catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), and glutathione reductase (GR) enzyme activity in the root, under 16 μg ml–1 of HgCl2 and different PGPB treatments. Results show that, although Hg stress generally induces enzyme activity, strains 31 and 69I (Pseudomonas corrugata) and 18 and 43 (Bacillus toyonensis) can keep SOD and APX levels close to those found in control without Hg (p < 0.01). Strain 18 also shows a significant reduction of GR to control levels without Hg. The present work demonstrates the benefit of PGPB treatments in situations of high Hg stress. These findings may be a good starting point to justify the role of PGPB naturally isolated from bulk soil and the rhizosphere of plants subjected to high Hg pressure in plant tolerance to such abiotic stress conditions. More studies will be needed to discover the molecular mechanisms behind the phytoprotective role of the strains with the best results, to understand the complex plant-microorganism relationships and to find effective and lasting symbioses useful in bioremediation processes.
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Sabreena, Hassan S, Bhat SA, Kumar V, Ganai BA, Ameen F. Phytoremediation of Heavy Metals: An Indispensable Contrivance in Green Remediation Technology. PLANTS (BASEL, SWITZERLAND) 2022; 11:1255. [PMID: 35567256 PMCID: PMC9104525 DOI: 10.3390/plants11091255] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 04/29/2022] [Accepted: 05/01/2022] [Indexed: 08/01/2023]
Abstract
Environmental contamination is triggered by various anthropogenic activities, such as using pesticides, toxic chemicals, industrial effluents, and metals. Pollution not only affects both lotic and lentic environments but also terrestrial habitats, substantially endangering plants, animals, and human wellbeing. The traditional techniques used to eradicate the pollutants from soil and water are considered expensive, environmentally harmful and, typically, inefficacious. Thus, to abate the detrimental consequences of heavy metals, phytoremediation is one of the sustainable options for pollution remediation. The process involved is simple, effective, and economically efficient with large-scale extensive applicability. This green technology and its byproducts have several other essential utilities. Phytoremediation, in principle, utilizes solar energy and has an extraordinary perspective for abating and assembling heavy metals. The technique of phytoremediation has developed in contemporary times as an efficient method and its success depends on plant species selection. Here in this synthesis, we are presenting a scoping review of phytoremediation, its basic principles, techniques, and potential anticipated prospects. Furthermore, a detailed overview pertaining to biochemical aspects, progression of genetic engineering, and the exertion of macrophytes in phytoremediation has been provided. Such a promising technique is economically effective as well as eco-friendly, decontaminating and remediating the pollutants from the biosphere.
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Affiliation(s)
- Sabreena
- Department of Environmental Science, University of Kashmir, Srinagar 190006, India; (S.); (S.H.)
| | - Shahnawaz Hassan
- Department of Environmental Science, University of Kashmir, Srinagar 190006, India; (S.); (S.H.)
| | - Sartaj Ahmad Bhat
- River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Vineet Kumar
- Department of Botany, Guru Ghasidas Vishwavidyalaya (A Central University), Chhattisgarh, Bilaspur 495009, India;
| | - Bashir Ahmad Ganai
- Department of Environmental Science, University of Kashmir, Srinagar 190006, India; (S.); (S.H.)
- Centre of Research for Development, University of Kashmir, Srinagar 190006, India
| | - Fuad Ameen
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
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Characteristics and Health Risk Assessment of Mercury Exposure via Indoor and Outdoor Household Dust in Three Iranian Cities. ATMOSPHERE 2022. [DOI: 10.3390/atmos13040583] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study aims to increase our current knowledge on the concentration of particulate-bound mercury (PBM) in urban environments of three Iranian cities, where high concentrations of dust particles can act as carriers for mercury transport and deposition. A total of 172 dust samples were collected from Ahvaz, Asaluyeh, and Zabol residential houses and in outdoor air and were analyzed for total mercury content. Ahvaz is a highly industrialized city with large metallurgical plants, refineries, and major oil-related activities, which were assumed to contribute to elevated contents of PBM in this city. Very high levels of Hg contamination in Ahvaz indoor dust samples were calculated (Contamination Factor: CF > 6). Sampling sites in Asaluyeh are influenced by Hg emissions from the South Pars Gas Field. However, the results revealed a relatively lower concentration of PBM in Asaluyeh, with a low-to-moderate level of Hg contamination. This is likely ascribed to the lower content of total mercury in hydrocarbon gases than crude oil, in addition to the absence of metal smelting plants in this city compared to Ahvaz. Zabol, as a city devoid of industrial activity, presented the lowest levels of PBM concentration and contamination. Indoor dust in Ahvaz showed considerable potential to cause a non-carcinogenic health risk for children, mainly through the inhalation of PBM, while the health risk for other cities was below safe limits. The trend of health risk was found in the order of indoor > outdoor and children > adults in all studied cities.
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Physiological Aspects of Absorption, Translocation, and Accumulation of Heavy Metals in Silphium perfoliatum L. Plants Grown in a Mining-Contaminated Soil. MINERALS 2022. [DOI: 10.3390/min12030334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Soil pollution by heavy metals as a result of mining activities is increasingly taking place. Once accumulated in soil, the heavy metals can then be dispersed, with serious effects on the environment and human health. It is therefore necessary to minimize, or even remove, all heavy metals from polluted areas, and one of the environmentally friendly and sustainable methods to do so is phytoremediation. A greenhouse pots experiment was conducted to evaluate the phytoremediation capacity of Silphium perfoliatum L. plants, in the vegetative growth stages, on a soil polluted with Cu, Zn, Cr and Pb, taken from a former mining area compared to an unpolluted soil (Us). The initial heavy metal content of polluted soil (Ps) was 208.3 mg kg−1 Cu; 312.5 mg kg−1 Zn; 186.5 mg kg−1 Cr and 195.2 mg kg−1 Pb. This shows that for Cu and Pb, soil concentrations exceed the intervention threshold, and for Zn and Cr, they are above the alert threshold. The removal efficiency, bioaccumulation factor, translocation factor, metal uptake and contamination factor index of Cu, Zn, Cr and Pb by S. perfoliatum L. were quantified to determine the bioremediation success. The data show that plants grown in Ps accumulated a significantly higher amount of Cu by 189% and Zn by 37.95% compared to Us. The Cr and Pb content of the plants recorded a progressive and significant increase from one developmental stage to another, being more intense between three and five leaves.
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21
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Allan-Blitz LT, Goldfine C, Erickson TB. Environmental and health risks posed to children by artisanal gold mining: A systematic review. SAGE Open Med 2022; 10:20503121221076934. [PMID: 35173966 PMCID: PMC8841918 DOI: 10.1177/20503121221076934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/11/2022] [Indexed: 11/16/2022] Open
Abstract
There are an estimated 5 million children working in artisanal and small-scale gold mines worldwide; however, the hazards are poorly characterized and often underreported. We systematically reviewed the literature on reports of hazards among children as a consequence of such activities through PubMed database using pre-defined search terms. We identified 113 articles published between 1984 and 2021 from 31 countries. Toxicological hazards were reported in 91 articles, including mercury, lead, and arsenic. Infectious hazards, noted in 18 articles, included malaria, cholera, and hepatitis. Six articles reported occupational hazards, including malnutrition, heat stroke, and reactive airway disease. Three articles reported traumatic hazards, including cave-ins, burns, animal attacks, falls, and weapon-inflected wounds. Those findings likely indicate a profound underreporting of the prevalence and consequences of such hazards among children. More work is needed both to characterize the burdens of those hazards and to address the underlying drivers of child labor in those settings.
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Affiliation(s)
- Lao-Tzu Allan-Blitz
- Department of Pediatrics, Boston Children’s Hospital, Boston, MA, USA
- Brigham and Women’s Hospital, Boston, MA, USA
| | - Charlotte Goldfine
- Brigham and Women’s Hospital, Boston, MA, USA
- Department of Emergency Medicine, Harvard Medical School, Boston, MA, USA
- Division of Medical Toxicology, Department of Emergency Medicine, Mass General Brigham, Boston, MA, USA
| | - Timothy B Erickson
- Brigham and Women’s Hospital, Boston, MA, USA
- Department of Emergency Medicine, Harvard Medical School, Boston, MA, USA
- Division of Medical Toxicology, Department of Emergency Medicine, Mass General Brigham, Boston, MA, USA
- Harvard Humanitarian Institute, Cambridge, MA, USA
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22
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Makarova A, Nikulina E, Tsirulnikova N, Pishchaeva K, Fedoseev A. Effect of monoethanolamine salt-containing dicarboxylic acid and plant growth regulators on the absorption and accumulation of mercury. Saudi J Biol Sci 2022; 29:3448-3455. [PMID: 35844374 PMCID: PMC9280225 DOI: 10.1016/j.sjbs.2022.02.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/08/2022] [Accepted: 02/20/2022] [Indexed: 11/23/2022] Open
Abstract
In the modern world, mercury has become an extremely dangerous pollutant due to intensive human activity. Currently, sources of mercury are wastes from chemical industries, as well as mines, oil combustion products, and household waste. Phytoextraction of heavy metals from soil is considered one of the most promising and cost-effective technologies. The efficiency of this process can be increased by introducing various amendments. The use of additives in phytoextraction can enhance the absorption of heavy metals and increase their concentration in various parts of the plant. This article presents the results of a study of various chelating agents for effective phytoextraction of mercury with white clover (Trifolium repens L.) and watercress (Lepidium sativum). In the present study, the monoethanolamine salt of dithiodiacetic acid (MEDBA) was used. The optimal concentration of MEDBA on watercress and creeping clover has been determined for highly efficient phytoextraction of mercury. Research has been carried out with a complex of exogenous growth regulators (GA / IAA / Fe-EDDHA). The results showed that the use of phytohormones and plant growth regulators led to a synergistic effect in combination with thiosulfate, but a pronounced inhibitory effect was observed with the use of MEDBA.
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Affiliation(s)
- Anna Makarova
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya Sq., 9, 125047 Moscow, Russia
| | - Elena Nikulina
- Institute of Chemical Reagents and Special Purity Chemicals of the National Research Center Kurchatov Institute (IREPC), St. Bogorodsky Val, 3, 107076 Moscow, Russia
| | - Nina Tsirulnikova
- Institute of Chemical Reagents and Special Purity Chemicals of the National Research Center Kurchatov Institute (IREPC), St. Bogorodsky Val, 3, 107076 Moscow, Russia
| | - Ksenia Pishchaeva
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya Sq., 9, 125047 Moscow, Russia
- Corresponding author at: Miusskaya Square, 9, 125047 Moscow, Russia.
| | - Andrey Fedoseev
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya Sq., 9, 125047 Moscow, Russia
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23
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Liu T, Man Y, Li P, Zhang H, Cheng H. A Hydroponic Study on Effect of Zinc Against Mercury Uptake by Triticale: Kinetic Process and Accumulation. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 108:359-365. [PMID: 34181031 DOI: 10.1007/s00128-021-03298-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 06/09/2021] [Indexed: 06/13/2023]
Abstract
We investigated the ability of triticale uptake of Mercury (Hg), clarified whether triticale root uptake of Hg2+ via Zinc (Zn2+) transports, using hydroponic experiments. At 25℃, when Hg exposure in solution was lower than 20 μM, Hg concentration in the roots can be better described by a hyperbolic function, which shows a saturable characteristic. Under ice-cold (< 2℃) conditions, a nonsaturable (linear) component was found. Low exposure of Zn2+ (0-1 μM) inhibited plant Hg uptake when Hg exposure in the solution ranged from 1 to 10 μM, it showed an antagonistic effect of Zn on plant uptake of Hg. When Hg exposure was 20 μM, it revealed a synergistic effect of Zn on plant uptake of Hg, Hg in the root increased at the Zn (1 μM) exposure in the solution. Our results will deepen the understanding of Hg transfer in the soil-plant system.
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Affiliation(s)
- Ting Liu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yi Man
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ping Li
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, People's Republic of China
| | - Hua Zhang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, People's Republic of China
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24
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Li H, Zu H, Li Q, Yang J, Qu W, Yang Z. Coordinatively Unsaturated Selenides over CuFeSe 2 toward Highly Efficient Mercury Immobilization. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:575-584. [PMID: 34931803 DOI: 10.1021/acs.est.1c05337] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Metal selenides have been demonstrated as promising Hg0 remediators, while their inadequate adsorption rate primarily impedes their application feasibility. Based on the critical role of coordinatively unsaturated selenide ligands in immobilizing Hg0, this work proposed a novel strategy to enhance the Hg0 adsorption rate of metal selenides by magnitudes by purposefully adjusting the selenide saturation. Copper iron diselenide (CuFeSe2), in which the surface reconstruction tended to occur at ambient temperature, was adopted as the concentrator of unsaturated selenides. The adsorption rate of CuFeSe2 reached as high as 900.71 μg·g-1·min-1, far exceeding those of the previously reported metal selenides by at least 1 magnitude. The excellent resistance of CuFeSe2 to flue gas interference and temperature fluctuation warrants its applicability in real-world conditions. The theoretical investigations and mechanistic interpretations based on density functional theory (DFT) calculation further confirmed the indispensable role of unsaturated selenides in Hg0 adsorption. This work aims not only to develop a Hg0 remediator with extensive applicability in coal combustion flue gas but also to take a step toward the rational design of selenide-based sorbents for diverse environmental remediation by the facile surface functionalization of coordinatively adjustable ligands.
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Affiliation(s)
- Hailong Li
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Hongxiao Zu
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Qin Li
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Jianping Yang
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Wenqi Qu
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Zequn Yang
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
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25
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Ekta, Utreja D. Fluorescence Based Comparative Sensing Behavior of the Nano-Composites of SiO 2 and TiO 2 towards Toxic Hg 2+ Ions. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3082. [PMID: 34835846 PMCID: PMC8621696 DOI: 10.3390/nano11113082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 11/16/2022]
Abstract
We have synthesized sulfonamide based nano-composites of SiO2 and TiO2 for selective and sensitive determination of toxic metal ion Hg2+ in aqueous medium. Nano-composites (11) and (12) were morphologically characterized with FT-IR, solid state NMR, UV-vis, FE SEM, TEM, EDX, BET, pXRD and elemental analysis. The comparative sensing behavior, pH effect and sensor concentrations were carried out with fluorescence signaling on spectrofluorometer and nano-composites (11) and (12), both were evaluated as "turn-on" fluorescence detector for the toxic Hg2+ ions. The LODs were calculated to be 41.2 and 18.8 nM, respectively of nano-composites (11) and (12). The detection limit of TiO2 based nano-composites was found comparatively lower than the SiO2 based nano-composites.
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Affiliation(s)
| | - Divya Utreja
- Department of Chemistry, Punjab Agricultural University, Ludhiana 141004, India;
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26
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Assessment of the Impact of a Motorway on Content andSpatial Distribution of Mercury in Adjacent Agricultural Soils. MINERALS 2021. [DOI: 10.3390/min11111221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The distribution of Hg in the vicinity of roads is probably not exclusively dependent on car emissions, but also on the presence of other point or diffuse sources of Hg emissions located from metres to several km away. The source of mercury in urbanised areas is pollution derived from the burning of fuels and industrial and transport waste, while in agricultural areas, it is constituent in mineral fertilisers and crop protection products. The research objective was to evaluate the content and spatial distribution of mercury in arable soils adjacent to the A1 motorway in Poland. The research material consisted of 40 soil samples taken from 20 test points on four transects at distances of 5, 10, 25 and 50 m from a noise barrier and in the direction of an arable field, and 10 m from the noise barrier in the direction of the motorway. Total mercury content was determined by atomic absorption spectrometry using an AMA 254 analyser. The spatial relationship between adjacent observations of variables was assessed using Moran’s I overall autocorrelation coefficient. Probability maps of mercury distribution in the field and pollution indicators were elaborated in ArcGIS 10.4.1. using Inverse Distance Weighted interpolation. Analysis of the spatial correlation of Moran’s I showed a lack of spatial dependence between tested points, which may evidence that the motorway does not affect mercury contents in the soil. The elevated mercury content at a single test point may indicate a random event unrelated to the motorway’s operation.
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27
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Geng X, Zhao W, Zhou Q, Duan Y, Huang T, Liu X. Effect of the Mechanochemical Process on the Stability of Mercury in Simulated Fly Ash, Part 2: Sulfur Additive. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xinze Geng
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Weimeng Zhao
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Qiang Zhou
- Engineering Laboratory for Energy System Process Conversion & Emission Control Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China
| | - Yufeng Duan
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Tianfang Huang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Xiaoshuo Liu
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
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28
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Johnson-Arbor K, Schultz B. Effective Decontamination and Remediation After Elemental Mercury Exposure: A Case Report in the United States. J Prev Med Public Health 2021; 54:376-379. [PMID: 34649400 PMCID: PMC8517368 DOI: 10.3961/jpmph.21.345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 08/03/2021] [Indexed: 11/09/2022] Open
Abstract
Elemental mercury exposure can result in significant toxicity. Source decontamination and remediation are often required after larger elemental mercury exposures, but the details of these processes are infrequently reported. In the case described herein, a 64-year-old woman and her husband were exposed to elemental mercury in their home after the husband purchased it online for the purpose of recreational barometer calibration. After the mercury reportedly spilled during the calibration process, a vacuum cleaner was used to decontaminate the affected surface; this led to extensive mercury contamination of the home. The couple was relocated from the home while remediation occurred over the course of several weeks. Vacuum cleaning of an elemental mercury spill can lead to extensive volatilization and recirculation of mercury vapor. For smaller mercury spills, careful removal of visible mercury beads by using an eyedropper, cardboard, and masking tape is recommended. Larger spills require professional decontamination and remediation and may necessitate involvement of governmental resources. Vacuum cleaning should not be used as an initial method of decontamination after elemental mercury exposure. Careful attention to source decontamination can reduce the emotional and financial costs associated with extensive remediation after elemental mercury exposure.
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Affiliation(s)
- Kelly Johnson-Arbor
- Department of Plastic and Reconstructive Surgery, MedStar Georgetown University Hospital, Washington, DC, USA.,National Capital Poison Center, Washington, DC, USA
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29
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Newsome L, Falagán C. The Microbiology of Metal Mine Waste: Bioremediation Applications and Implications for Planetary Health. GEOHEALTH 2021; 5:e2020GH000380. [PMID: 34632243 PMCID: PMC8490943 DOI: 10.1029/2020gh000380] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 08/17/2021] [Accepted: 08/20/2021] [Indexed: 05/13/2023]
Abstract
Mine wastes pollute the environment with metals and metalloids in toxic concentrations, causing problems for humans and wildlife. Microorganisms colonize and inhabit mine wastes, and can influence the environmental mobility of metals through metabolic activity, biogeochemical cycling and detoxification mechanisms. In this article we review the microbiology of the metals and metalloids most commonly associated with mine wastes: arsenic, cadmium, chromium, copper, lead, mercury, nickel and zinc. We discuss the molecular mechanisms by which bacteria, archaea, and fungi interact with contaminant metals and the consequences for metal fate in the environment, focusing on long-term field studies of metal-impacted mine wastes where possible. Metal contamination can decrease the efficiency of soil functioning and essential element cycling due to the need for microbes to expend energy to maintain and repair cells. However, microbial communities are able to tolerate and adapt to metal contamination, particularly when the contaminant metals are essential elements that are subject to homeostasis or have a close biochemical analog. Stimulating the development of microbially reducing conditions, for example in constructed wetlands, is beneficial for remediating many metals associated with mine wastes. It has been shown to be effective at low pH, circumneutral and high pH conditions in the laboratory and at pilot field-scale. Further demonstration of this technology at full field-scale is required, as is more research to optimize bioremediation and to investigate combined remediation strategies. Microbial activity has the potential to mitigate the impacts of metal mine wastes, and therefore lessen the impact of this pollution on planetary health.
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Affiliation(s)
- Laura Newsome
- Camborne School of Mines and Environment and Sustainability InstituteUniversity of ExeterPenrynUK
| | - Carmen Falagán
- Camborne School of Mines and Environment and Sustainability InstituteUniversity of ExeterPenrynUK
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30
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Pinto AAG, Nagai MYDO, Coimbra EN, Mohammad SN, Silva JS, Von Ancken A, Pinto SAG, Aguiar MS, Dutra-Correa M, Hortellani MA, Miranda A, Sarkis JEDS, Suffredini IB, Peres GB, Bernardi MM, Cartwright SJ, Bonamin LV. Bioresilience to Mercury Chloride of the Brine Shrimp Artemia Salina after Treatment with Homeopathic Mercurius Corrosivus. HOMEOPATHY 2021; 110:244-255. [PMID: 34474498 DOI: 10.1055/s-0041-1729562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Finding solutions to mitigate the impact of pollution on living systems is a matter of great interest. Homeopathic preparations of toxic substances have been described in the literature as attenuation factors for intoxication. Herein, an experimental study using Artemia salina and mercury chloride was developed as a model to identify aspects related to bioresilience. AIMS The aim of the study was to describe the effects of homeopathic Mercurius corrosivus (MC) on Artemia salina cysts hatching and on mercury bioavailability. METHODS Artemia salina cysts were exposed to 5.0 µg/mL of mercury chloride during the hatching phase. MC potencies (6cH, 30cH, and 200cH) were prepared in sterile purified water and poured into artificial sea water. Different controls were used (non-challenged cysts and challenged cysts treated with water, succussed water, and Ethilicum 1cH). Four series of nine experiments were performed to evaluate the percentage of cyst hatching. Soluble total mercury (THg) levels and precipitated mercury content were also evaluated. Solvatochromic dyes were used to check for eventual physicochemical markers of MC biological activity. RESULTS Significant delay (p < 0.0001) in cyst hatching was observed only after treatment with MC 30cH, compared with controls. This result was associated with an increase of THg concentration in water (p = 0.0018) and of chlorine/oxygen ratio (p < 0.0001) in suspended micraggregates, suggesting changes in mercury bioavailability. A specific interaction of MC 30cH with the solvatochromic dye ET33 (p = 0.0017) was found. CONCLUSION Changes in hatching rate and possible changes in Hg bioavailability are postulated as protective effects of MC 30cH on Artemia salina, by improving its natural bioresilience processes.
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Affiliation(s)
- Andreia Adelaide G Pinto
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Mirian Y de Oliveira Nagai
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Ednar Nascimento Coimbra
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | | | - Jefferson Souza Silva
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Adalberto Von Ancken
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Sandra Augusta G Pinto
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Michelle Sanchez Aguiar
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Maristela Dutra-Correa
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | | | - Adriana Miranda
- IPEN-Institute of Energy and Nuclear Research, São Paulo, Brazil, São Paulo, Brazil
| | | | - Ivana Barbosa Suffredini
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Giovani Bravin Peres
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | - Maria Martha Bernardi
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
| | | | - Leoni Villano Bonamin
- Graduation Program in Environmental and Experimental Pathology, Universidade Paulista, São Paulo, Brazil
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31
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Cho K, Kang J, Kim S, Purev O, Myung E, Kim H, Choi N. Effect of inorganic carbonate and organic matter in thermal treatment of mercury-contaminated soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:48184-48193. [PMID: 33904130 PMCID: PMC8410726 DOI: 10.1007/s11356-021-14024-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/16/2021] [Indexed: 05/30/2023]
Abstract
Thermal treatment of mercury (Hg)-contaminated soil was studied to investigate the desorption behavior of Hg at different temperatures. The soil samples were collected from two locations with different land uses around the mine and industrial site. The effect of soil properties such as inorganic carbonate minerals and organic matter content on Hg desorption was investigated to understand the thermal desorption process. The effect of soil composition on Hg desorption showed that behavior at 100 °C was similar, but a different behavior could be found at 300 °C. The thermal desorption efficiency at 300 °C is affected by the thermal properties of soils and the Hg desorption capacity of the soils. The Hg from both soil types was removed above 300 °C, and Hg was effectively removed from mine soil due to the partial decomposition of carbonate in the soil composition, while industrial soil showed that desorption would be restrained by Hg organic matter complexes due to organic matter content. Despite a relatively higher concentration of Hg in the mine soil, Hg removal efficiency was greater than that in the industrial soil. Sequential extraction results showed that only the Hg fractions (residual fractions, step 6) in mine soil changed, while the industrial soil was affected by changes in Hg fractions (step 3 to step 6) at 300 °C. Changes in soil pH during thermal desorption are also influenced by heating time and temperature. Therefore, the mechanisms of Hg desorption during thermal treatment were observed by soil properties. The volatilization of Hg in the soil is induced by organic carbon, while soil Hg release is controlled by organic matter complexes.
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Affiliation(s)
- Kanghee Cho
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Korea
| | - Jinkyu Kang
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Korea
| | - Songbae Kim
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Korea
| | - Oyunbileg Purev
- Department of Energy and Resource Engineering, Chosun University, Gwangju, 61452, Korea
| | - Eunji Myung
- Department of Energy and Resource Engineering, Chosun University, Gwangju, 61452, Korea
| | - Hyunsoo Kim
- Department of Energy and Resource Engineering, Chosun University, Gwangju, 61452, Korea
| | - Nagchoul Choi
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Korea.
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32
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Wang G, Guo K, Wang B, Han F, Guo Z, Song Z, Ji J, Tang C. Mercury Adsorption on Thiol-Modified Porous Boron Nitride: A Combined Experimental and Theoretical Investigation. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Gaoxing Wang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Kai Guo
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Bozheng Wang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Fengxiang Han
- Department of Chemistry, Physics and Atmospheric Science, Jackson State University, 1400 J.R. Lynch Street, Jackson, Mississippi 39217, United States
| | - Zhonglu Guo
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Zirui Song
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Jiawei Ji
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Chengchun Tang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
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33
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Guo S, Swager TM. Versatile Porous Poly(arylene ether)s via Pd-Catalyzed C-O Polycondensation. J Am Chem Soc 2021; 143:11828-11835. [PMID: 34313420 DOI: 10.1021/jacs.1c05853] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Porous organic polymers (POPs) with strong covalent linkages between various rigid aromatic structural units having different geometries and topologies are reported. With inherent porosity, predictable structure, and tunable functionality, POPs have found utility in gas separation, heterogeneous catalysis, sensing, and water treatment. Poly(arylene ether)s (PAEs) are a family of high-performance thermoplastic materials with high glass-transition temperatures, exceptional thermal stability, robust mechanical properties, and excellent chemical resistance. These properties are desirable for development of durable POPs. However, the synthetic methodology for the preparation of these polymers has been mainly limited in scope to monomers capable of undergoing nucleophilic aromatic substitution (SNAr) reactions. Herein, we describe a new general method using Pd-catalyzed C-O polycondensation reactions for the synthesis of PAEs. A wide range of new compositions and PAE architectures are now readily available using monomers with unactivated aryl chlorides and bromides. Specifically, monomers with conformational rigidity and intrinsic internal free volume are now used to create porous organic polymers with high molecular weight, good thermal stability, and porosity. The reported porous PAEs are solution processable and can be used in environmentally relevant applications including heavy-metal-ion sensing and capture.
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Affiliation(s)
- Sheng Guo
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Timothy M Swager
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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34
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Liu C, Liu J, Guo P, Peng J, Zhang L, Li Y. Mercury removal from spent low‐level mercury catalyst by thermal treatment. CAN J CHEM ENG 2021. [DOI: 10.1002/cjce.24122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chao Liu
- State Key Laboratory of Nuclear Resources and Environment East China University of Technology Nanchang China
| | - Jian Liu
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming China
- Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming China
| | - Ping Guo
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming China
- Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming China
| | - Jinhui Peng
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming China
- Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming China
| | - Libo Zhang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming China
- Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming China
| | - Yaping Li
- Guangdong Key Laboratory of Radioactive and Rare Resource Utilization Shaoguan China
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35
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Adsorption/Desorption Capability of Potassium-Type Zeolite Prepared from Coal Fly Ash for Removing of Hg2+. SUSTAINABILITY 2021. [DOI: 10.3390/su13084269] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The feasibility of using potassium-type zeolite (K-type zeolite) prepared from coal fly ash (CFA) for the removal of Hg2+ from aqueous media and the adsorption/desorption capabilities of various potassium-type zeolites were assessed in this study. Potassium-type zeolite samples were synthesized by hydrothermal treatment of CFA at different intervals (designated CFA, FA1, FA3, FA6, FA12, FA24, and FA48, based on the hours of treatment) using potassium hydroxide solution, and their physicochemical characteristics were evaluated. Additionally, the quantity of Hg2+ adsorbed was in the order CFA, FA1 < FA3 < FA6 < FA12 < FA24 < FA48, in the current experimental design. Therefore, the hydrothermal treatment time is important to enhance the adsorption capability of K-type zeolite. Moreover, the effects of pH, temperature, contact time, and coexistence on the adsorption of Hg2+ were elucidated. In addition, Hg2+ adsorption mechanism using FA48 was demonstrated. Our results indicated that Hg2+ was exchanged with K+ in the interlayer of FA48 (correlation coefficient = 0.946). Finally, adsorbed Hg2+ onto FA48 could be desorbed using a sodium hydroxide solution (desorption percentage was approximately 70%). Our results revealed that FA48 could be a potential adsorbent for the removal of Hg2+ from aqueous media.
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Makarova A, Nikulina E, Tsirulnikova N, Avdeenkova T, Pishchaeva KV. Potential of S-containing and P-containing complexones in improving phytoextraction of mercury by Trifolium repens L.. Saudi J Biol Sci 2021; 28:3037-3048. [PMID: 34025180 PMCID: PMC8117166 DOI: 10.1016/j.sjbs.2021.02.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 11/28/2022] Open
Abstract
Mercury is a global pollutant in the modern world. There is a large number of areas in the world where mercury is present in soils in significant quantities. Remediation methods which have traditionally been proposed may pose a risk of secondary mercury contamination and/or adverse health effects for cleaners. Phytoextraction of heavy metals from the soil environment is currently considered one of the promising non-invasive methods of remediation. But this approach has limited effectiveness. Chemically induced phytoextraction can increase the efficiency of this process both by converting less bioavailable mercury compounds to bioavailable fractions in the soil and by increasing the rate of transfer of metals in plants. This paper presents the results of a screening study of various chemical amendments to enhance the phytoextraction of mercury by Trifolium repens L. The results showed good potential for the induction of phytoextraction of phosphorus(P) and sulfur (S)-containing chelates. With this study, for the first time for the phytoextraction of mercury, the monoethanolamine salt of 2,2′-(ethylenedithio) diacetic acid was used as the S-containing chelate, and the disubstituted potassium salt of 1-hydroxy ethylidene-1,1-diphosphonic acid was used as the P-containing chelate. Further attention is given to study the effect that exogenous application of phytohormones and plant growth regulators has on the efficiency of mercury absorption and physiological status of plants, which performed well in combination with a P-containing chelate.
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Affiliation(s)
- Anna Makarova
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya Sq., 9, 125047 Moscow, Russia
| | - Elena Nikulina
- Institute of Chemical Reagents and Special Purity Chemicals of the National Research Center Kurchatov Institute (IREPC), St. Bogorodsky Val, 3, 107076 Moscow, Russia
| | - Nina Tsirulnikova
- Institute of Chemical Reagents and Special Purity Chemicals of the National Research Center Kurchatov Institute (IREPC), St. Bogorodsky Val, 3, 107076 Moscow, Russia
| | - Tatyana Avdeenkova
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya Sq., 9, 125047 Moscow, Russia
| | - Ksenia V Pishchaeva
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya Sq., 9, 125047 Moscow, Russia
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Preparation and Characterization of the Sulfur-Impregnated Natural Zeolite Clinoptilolite for Hg(II) Removal from Aqueous Solutions. Processes (Basel) 2021. [DOI: 10.3390/pr9020217] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Sulfur-impregnated zeolite has been obtained from the natural zeolite clinoptilolite by chemical modification with Na2S at 150 °C. The purpose of zeolite impregnation was to enhance the sorption of Hg(II) from aqueous solutions. Chemical analysis, acid and basic properties determined by Bohem’s method, chemical behavior at different pHo values, zeta potential, cation-exchange capacity (CEC), specific surface area, X-ray powder diffraction (XRPD), scanning electron microscopy with energy-dispersive X-ray analysis (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), as well as thermogravimetry with derivative thermogravimetry (TG-DTG) were used for detailed comparative mineralogical and physico-chemical characterization of natural and sulfur-impregnated zeolites. Results revealed that the surface of the natural zeolite was successfully impregnated with sulfur species in the form of FeS and CaS. Chemical modification caused an increase in basicity and the net negative surface charge due to an increase in oxygen-containing functional groups as well as a decrease in specific surface area and crystallinity due to the formation of sulfur-containing clusters at the zeolite surface. The sorption of Hg(II) species onto the sulfur-impregnated zeolite was affected by the pH, solid/liquid ratio, initial Hg(II) concentration, and contact time. The optimal sorption conditions were determined as pH 2, a solid/liquid ratio of 10 g/L, and a contact time of 800 min. The maximum obtained sorption capacity of the sulfur-impregnated zeolite toward Hg(II) was 1.02 mmol/g. The sorption mechanism of Hg(II) onto the sulfur-impregnated zeolite involves electrostatic attraction, ion exchange, and surface complexation, accompanied by co-precipitation of Hg(II) in the form of HgS. It was found that sulfur-impregnation enhanced the sorption of Hg(II) by 3.6 times compared to the natural zeolite. The leaching test indicated the retention of Hg(II) in the zeolite structure over a wide pH range, making this sulfur-impregnated sorbent a promising material for the remediation of a mercury-polluted environment.
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Comparative Study of Mercury(II) Removal from Aqueous Solutions onto Natural and Iron-Modified Clinoptilolite Rich Zeolite. Processes (Basel) 2020. [DOI: 10.3390/pr8111523] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The contamination of soil and water bodies with mercury from anthropogenic sources such as mining and industry activities causes negative effect for living organisms due to the process of bioaccumulation and biomagnification through the food chain. Therefore, the need for remediation of contaminated areas is extremely necessary and very desirable when it is cost-effective by using low-cost sorbents. This paper compares the sorption abilities of natural and iron-modified zeolite towards Hg(II) ions from aqueous solutions. The influence of pH, solid/liquid ratio (S/L), contact time, and initial concentration on the sorption efficiency onto both zeolites was investigated. At the optimal pH = 2 and S/L = 10, the maximum amount of sorbed Hg(II) is 0.28 mmol/g on the natural zeolite and 0.54 mmol/g on the iron-modified zeolite. It was found that rate-controlling step in mass transfer is intraparticle diffusion accompanied by film diffusion. Ion exchange as a main mechanism, accompanied with surface complexation and co-precipitation were included in the Hg(II) sorption onto both zeolite samples. This is confirmed by the determination of the amount of sorbed Hg(II) and the amount of released exchangeable cations from the zeolite structure as well as by the scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDS) of saturated zeolite samples. In a wide pH range, 4.01 ≤ pH ≤ 11.08, the leaching of Hg(II) was observed in the amount of only 0.28–0.78% from natural zeolite and 0.07–0.51% from iron-modified zeolite indicating that both zeolites could be used for remediation purposes while the results suggest that modification significantly improves the sorption properties of zeolite.
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Durand A, Maillard F, Foulon J, Chalot M. Interactions between Hg and soil microbes: microbial diversity and mechanisms, with an emphasis on fungal processes. Appl Microbiol Biotechnol 2020; 104:9855-9876. [PMID: 33043392 DOI: 10.1007/s00253-020-10795-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 07/06/2020] [Accepted: 07/21/2020] [Indexed: 11/25/2022]
Abstract
Mercury (Hg) is a highly toxic metal with no known biological function, and it can be highly bioavailable in terrestrial ecosystems. Although fungi are important contributors to a number of soil processes including plant nutrient uptake and decomposition, little is known about the effect of Hg on fungi. Fungi accumulate the largest amount of Hg and are the organisms capable of the highest bioaccumulation of Hg. While referring to detailed mechanisms in bacteria, this mini-review emphasizes the progress made recently on this topic and represents the first step towards a better understanding of the mechanisms underlying Hg tolerance and accumulation in fungal species and hence on the role of fungi within the Hg cycle at Hg-contaminated sites. KEY POINTS: • The fungal communities are more resilient than bacterial communities to Hg exposure. • The exposure to Hg is a threat to microbial soil functions involved in both C and nutrient cycles. • Fungal (hyper)accumulation of Hg may be important for the Hg cycle in terrestrial environments. • Understanding Hg tolerance and accumulation by fungi may lead to new remediation biotechnologies.
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Affiliation(s)
- Alexis Durand
- Laboratoire Chrono-Environnement, UMR 6249, Université de Bourgogne Franche-Comté, Pôle Universitaire du Pays de Montbéliard, 4 place Tharradin, BP 71427, 25211, Montbéliard, France
- Laboratoire Sols et Environnement, UMR 1120, Université de Lorraine - INRAE, 2 avenue de la Forêt de Haye BP 20 163, 54505, Vandœuvre-lès-Nancy, France
| | - François Maillard
- Laboratoire Chrono-Environnement, UMR 6249, Université de Bourgogne Franche-Comté, Pôle Universitaire du Pays de Montbéliard, 4 place Tharradin, BP 71427, 25211, Montbéliard, France
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN, 55108, USA
| | - Julie Foulon
- Laboratoire Chrono-Environnement, UMR 6249, Université de Bourgogne Franche-Comté, Pôle Universitaire du Pays de Montbéliard, 4 place Tharradin, BP 71427, 25211, Montbéliard, France
- Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, C.P. 3300, Rimouski, QC, G5L 3A1, Canada
| | - Michel Chalot
- Laboratoire Chrono-Environnement, UMR 6249, Université de Bourgogne Franche-Comté, Pôle Universitaire du Pays de Montbéliard, 4 place Tharradin, BP 71427, 25211, Montbéliard, France.
- Faculté des Sciences et Technologies, Université de Lorraine, BP 70239, 54506, Vandoeuvre-les-Nancy, France.
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Hamid Reza Rashvand, Hajiaghababaei L, Darvich MR, Sarvestani MRJ, Miyandoab FJ. A Liquid Membrane Mercury Selective Electrode Based on 2-(N-pipyridino Methyl)-1-Cyano Cyclohexanol as a Novel Neutral Carrier. JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1134/s106193482010010x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chang J, Shi Y, Si G, Yang Q, Dong J, Chen J. The bioremediation potentials and mercury(II)-resistant mechanisms of a novel fungus Penicillium spp. DC-F11 isolated from contaminated soil. JOURNAL OF HAZARDOUS MATERIALS 2020; 396:122638. [PMID: 32361297 DOI: 10.1016/j.jhazmat.2020.122638] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/29/2020] [Accepted: 04/01/2020] [Indexed: 05/20/2023]
Abstract
Bioremediation of Hg-contaminated soil using microbe-based strategies is a promising and efficient method as it is inexpensive and not harmful to the environment. In this study, a novel Hg(II)-volatilizing fungus Penicillium spp., DC-F11 was isolated and showed bioremediation potential for reducing Hg(II) phytotoxicity, total Hg, and exchangeable Hg in Hg(II)-polluted soil. Subsequently, the mechanisms of Hg(II) volatilization and resistance involved were investigated using multiple complementary techniques. The fungal cells could detoxify Hg(II) by extracellular sequestration via adsorption and precipitation. Moreover, a comparative transcriptome analysis uncovered the primary intracellular adaptive responses of the DC-F11 to Hg(II) stress, including mer-mediated detoxification system, thiol compound metabolism, and oxidative stress defense and damage repair metabolism. These results showed that the resistance of DC-F11 to Hg(II) was generally a multisystem collaborative process. Here, we report, for the first time, that the mer-mediated detoxification system was responsible for Hg(II) volatilization in fungus. These findings provide a better understanding of the mechanisms involved in Hg(II) volatilization and resistance that occur in fungi and also provide a strong theoretical basis for the future application of fungi in the bioremediation of Hg-polluted environments.
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Affiliation(s)
- Junjun Chang
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China; Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650091, China; International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management of Yunnan, Kunming, 650091, China
| | - Yu Shi
- Institute of International Rivers and Eco-security, Yunnan University, Kunming, 650091, China
| | - Guangzheng Si
- Institute of International Rivers and Eco-security, Yunnan University, Kunming, 650091, China
| | - Qingchen Yang
- Institute of International Rivers and Eco-security, Yunnan University, Kunming, 650091, China
| | - Jia Dong
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China
| | - Jinquan Chen
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China; Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650091, China; International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management of Yunnan, Kunming, 650091, China.
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Rollinson AN, Bhuptani J, Beyer J, Ismawati Y, Radu T. Anaerobic digestion of mercury phytoextraction crops with intermediary stage bio-waste polymer treatment. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 22:1431-1439. [PMID: 32602364 DOI: 10.1080/15226514.2020.1781781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In laboratory experiments, Lepidium sativum L. and Mentha spicata L. were grown in compost spiked with mercury. After cultivation for 20 and 68 days, respectively, translocation factors of 0.05 ≤ TF ≤ 0.2 (Lepidium sativum) and accumulation factors of 2.2 ≤ AF ≤ 12 (Mentha spicata) were recorded. Plants were then harvested and used as feedstock for bench-scale anaerobic digesters. The reactors operated in continuously-stirred batch mode for a period of ten days. Inhibition of anaerobic biogas production was apparent with one sample set evidencing mercury-induced bacteriostatic toxicity. Otherwise, ex-situ characterization of digestate showed that the reactors were within stable operating range. A canola oil-sulphide polymer derived from bio-waste was also used as an intermediary treatment stage to test its capacity for extracting mercury from half the samples prior to anaerobic digestion, and also from the post-experimentation reactor digestate. The polymer removed mercury from digestate with a 40-50% efficacy across all samples, suggesting its potential as a sludge clean-up option. Anaerobic digestion combined with staged polymer extraction offers a potential route for the disposal of phytoremediation crops and ultimately the recovery of mercury, coincident with the production of a bioenergy vector.
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Affiliation(s)
- Andrew N Rollinson
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, UK
| | - Jayshree Bhuptani
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, UK
| | | | | | - Tanja Radu
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, UK
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Nosike EI, Jiang Z, Miao L, Akakuru OU, Yuan B, Wu S, Zhang Y, Zhang Y, Wu A. A novel hybrid nanoadsorbent for effective Hg 2+ adsorption based on zeolitic imidazolate framework (ZIF-90) assembled onto poly acrylic acid capped Fe 3O 4 nanoparticles and cysteine. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122288. [PMID: 32109794 DOI: 10.1016/j.jhazmat.2020.122288] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/18/2020] [Accepted: 02/11/2020] [Indexed: 06/10/2023]
Abstract
This research reports a new mercury adsorbent in which Fe3O4 as a core was embedded into the shell of ZIF-90 in a one-pot synthesis and the subsequent post synthesis modification (PSM) of its surface with cysteine covalently, via a Schiff's base reaction. Poly acrylic acid (PAA) was capped on the surface of nanoparticles to prevent agglomeration of the nanoparticles. In addition, -COOH groups of PAA coordinated with Zn2+ of ZIF-90 and this provided the platform for ZIF-90 to grow on the nanoparticles forming the core-shell structure. Based on the strong interactions between the thiol groups on the adsorbent and mercury ions as elucidated by the XPS analysis, the as-synthesized adsorbent showed selectivity for Hg2+. The sorbent exhibited high adsorption capacity of 900 mg g-1 towards Hg2+ as calculated at pH 4 and the adsorption kinetics followed pseudo-second-order kinetics model better. The Hg2+ loaded adsorbent was easily regenerated and it maintained about 70 % efficiency after the third use. Low-cost, readily available and green materials, facile preparation, efficient removal and the breakthrough in three times recyclability give the novel ZIF-90 based hybrid nanoadsorbent wide prospects in the field of environmental remediation as a good adsorbent for Hg2+ removal in wastewater.
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Affiliation(s)
- Elvis Ikechukwu Nosike
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhenqi Jiang
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lijing Miao
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China
| | - Ozioma Udochukwu Akakuru
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bo Yuan
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China
| | - Shasha Wu
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China
| | - Yuenan Zhang
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China
| | - Yujie Zhang
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China.
| | - Aiguo Wu
- Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhong-guan West Road, Zhenhai District, Ningbo, Zhejiang, 315201, China.
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CuFe 2O 4/Polyaniline (PANI) Nanocomposite for the Hazard Mercuric Ion Removal: Synthesis, Characterization, and Adsorption Properties Study. Molecules 2020; 25:molecules25122721. [PMID: 32545457 PMCID: PMC7356621 DOI: 10.3390/molecules25122721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/05/2020] [Accepted: 06/09/2020] [Indexed: 11/17/2022] Open
Abstract
Copper ferrite nano-particles (CuFe2O4) were synthesized, characterized, modified with polyaniline to form CuFe2O4/PANI nano-composite. They were used as new adsorbents for the removal of the hazardous mercuric ions from aqueous solutions. High resolution transmission electron microscope (HR-TEM), X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) and Brunauer–Emmett–Teller (BET) were used for the characterization of the synthesized CuFe2O4 nano-particles (NPs) in presence and absence of PANI nano-composite. The synthesized CuFe2O4NPs were of spherical shape with an average size of 10.8 nm. XRD analysis displayed crystal peaks for CuFe2O4NPs and amorphous peaks CuFe2O4/PANI nano-composite due to the existence of polyaniline layer. Contact time, adsorbent dose, solution pH, adsorption kinetics, adsorption isotherm and recyclability were studied. The method at the optimum conditions exhibited high performance with high mercury removal percentage of up to 99% with a maximum adsorption capacity 12.5 and 157.1 mg/g for CuFe2O4 and CuFe2O4/PANI, respectively. The adsorption processes were fitted to Langmuir isotherms. The adsorption behavior of CuFe2O4@PANI composite towards Hg2+ ions is attributed to the soft acid–soft base strong interaction between PANI and Hg(II) ions. High stability and enhanced re-usability are offered using CuFe2O4@PANI composite due to its enhanced removal efficiency. No significant removal decrease was noticed after five adsorption–desorption cycles. In addition, it possesses an easy removal from aqueous solutions by external magnetic field after adsorption experiments. These indicated the enhancement of polyaniline to the surface of CuFe2O4 toward the adsorption of mercury from aqueous solutions.
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Ancora S, Rossi F, Borgese M, Pirrone C, Caliani I, Cappello S, Mancini G, Bianchi N, Leonzio C, Bernardini G, Gornati R. Assessing the Effect of Contaminated and Restored Marine Sediments in Different Experimental Mesocosms Using an Integrated Approach and Mytilus galloprovincialis as a Model. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2020; 22:411-422. [PMID: 32240431 DOI: 10.1007/s10126-020-09961-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 02/26/2020] [Indexed: 06/11/2023]
Abstract
The research presented here was conducted to ascertain the effectiveness of recovery technologies in remediating a compromised marine environment. The multidisciplinary approach aims to integrate traditional chemical-physical analysis and to assess the biological parameters of Mytilus galloprovincialis within different experimental mesocosms (W, G, and B). In particular, this system was designed to reproduce sediment resuspension in a marine environment, which is thought to be one cause of contaminant release. The study combined morphological and ultrastructural observations with DNA damage assessment and mRNA expression of those genes involved in cellular stress responses. The tissues of mussels maintained in the polluted mesocosm showed a higher accumulation of Pb and Hg than in those maintained in restored mesocosm. This observation correlates well with mRNA expression of MT10 and data on DNA damage. The outcome of the biological evaluation consolidates the chemical characterization and supports the concept that the remediation method should be evaluated at an early stage, both to analytically determine the reduction of toxic components and to assess its ultimate impact on the biological system.
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Affiliation(s)
- Stefania Ancora
- Department of Physical, Earth and Environmental Sciences, University of Siena, via Mattioli, 4, 53100, Siena, Italy
| | - Federica Rossi
- Department of Biotechnology and Life Sciences, University of Insubria, Via Dunant 3, 21100, Varese, Italy
| | - Marina Borgese
- Department of Biotechnology and Life Sciences, University of Insubria, Via Dunant 3, 21100, Varese, Italy
| | - Cristina Pirrone
- Department of Biotechnology and Life Sciences, University of Insubria, Via Dunant 3, 21100, Varese, Italy
| | - Ilaria Caliani
- Department of Physical, Earth and Environmental Sciences, University of Siena, via Mattioli, 4, 53100, Siena, Italy
| | - Simone Cappello
- Institute for Biological Resources and Marine Biotechnology (IRBIM)-CNR of Messina, Via San Raineri 86, 98122, Messina, Italy
| | - Giuseppe Mancini
- Electric, Electronics and Computer Engineering Department, University of Catania, Viale Andrea Doria 6, 95125, Catania, Italy
| | - Nicola Bianchi
- Department of Physical, Earth and Environmental Sciences, University of Siena, via Mattioli, 4, 53100, Siena, Italy
| | - Claudio Leonzio
- Department of Physical, Earth and Environmental Sciences, University of Siena, via Mattioli, 4, 53100, Siena, Italy
| | - Giovanni Bernardini
- Department of Biotechnology and Life Sciences, University of Insubria, Via Dunant 3, 21100, Varese, Italy
| | - Rosalba Gornati
- Department of Biotechnology and Life Sciences, University of Insubria, Via Dunant 3, 21100, Varese, Italy.
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Feng Y, Liu P, Wang Y, Liu W, Liu Y, Finfrock YZ. Mechanistic investigation of mercury removal by unmodified and Fe-modified biochars based on synchrotron-based methods. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 719:137435. [PMID: 32114231 DOI: 10.1016/j.scitotenv.2020.137435] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
Improved surface characteristics and incorporated Fe, S, and Cl species are reported in Fe-modified biochar, which makes it a prospective material for Hg(II) removal. In this study, aqueous Hg(II) was removed from solution by unmodified, FeCl3-modified, and FeSO4-modified biochars pyrolyzed at 300, 600, or 900 °C. Higher pyrolytic temperature resulted in higher removal efficiency, with the biochars pyrolyzed at 900 °C removing >96% of Hg(II). Fe-modification enhanced Hg(II) removal for biochars pyrolyzed at 600 °C (from 88% to >95%) or 900 °C (from 96% to 99%). Based on synchronous extended X-ray absorption fine structure (EXAFS) analysis, Hg coordinated to S in modified and unmodified biochars pyrolyzed at 900 °C, where thiol was reported, and in FeSO4-modified biochars pyrolyzed at 600 or 900 °C, where sulfide was recognized; in other biochars, Hg bound to O or Cl. Additionally, confocal micro-X-ray fluorescence imaging (CMXRFI) demonstrated Hg was distributed in agreement with S in biochars where HgS was formed; otherwise, Hg distribution was influenced by Hg species in solution and the pore characteristics of the biochar. This investigation provides information on the effectiveness and mechanisms of Hg removal that is critical for evaluating biochar applications and optimizing modification methods in groundwater remediation.
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Affiliation(s)
- Yu Feng
- School of Environmental Studies, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Peng Liu
- School of Environmental Studies, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China.
| | - Yanxin Wang
- School of Environmental Studies, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Wenfu Liu
- School of Environmental Studies, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - YingYing Liu
- Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Y Zou Finfrock
- CLS@APS sector 20, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA; Science Division, Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, SK S7N 2V3, Canada
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Alcantara HJP, Jativa F, Doronila AI, Anderson CWN, Siegele R, Spassov TG, Sanchez-Palacios JT, Boughton BA, Kolev SD. Localization of mercury and gold in cassava (Manihot esculenta Crantz). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:18498-18509. [PMID: 32193739 DOI: 10.1007/s11356-020-08285-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 03/02/2020] [Indexed: 06/10/2023]
Abstract
The potential of cassava (Manihot esculenta Crantz.) for simultaneous Hg and Au phytoextraction was explored by investigating Hg and Au localization in cassava roots through Micro-Proton Induced X-Ray Emission, High-Resolution Transmission Electron Microscopy (HR-TEM) and X-Ray Diffractometry (XRD). The effect of Hg and Au in the cyanogenic glucoside linamarin distribution was also investigated using Matrix Assisted Laser Desorption Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (MALDI-FT-ICR-MS) imaging. Hg was located mainly in the root vascular bundle of plants grown in 50 or 100 μmol L-1 Hg solutions. Au was localized in the epidermis and cortex or in the epidermis and endodermis for 50 and 100 μmol L-1 Au solutions, respectively. For 50 μmol L-1 solutions of both Hg and Au, the two metals were co-localized in the epidermis. When the Hg concentrations were increased to 100 μmol L-1, Au was still localized to a considerable extent in the epidermis while Hg was located in all root parts. HR-TEM and XRD revealed that Au nanoparticles were formed in cassava roots. MALDI-FT-ICR-MS imaging showed linamarin distribution in the roots of control and plants and metal-exposed plants thus suggesting that linamarin might be involved in Hg and Au uptake and distribution.
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Affiliation(s)
- Hannah Joy P Alcantara
- School of Chemistry, The University of Melbourne, Melbourne, Victoria, 3010, Australia
- Institute of Biology, The University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Fernando Jativa
- Department of Biomedical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Augustine I Doronila
- School of Chemistry, The University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - Christopher W N Anderson
- Soil and Earth Sciences Group, Institute of Agriculture and Environment, Massey University, Private Bag 11-222, Palmerston North, 4442, New Zealand
| | - Rainer Siegele
- Institute for Environmental Research, Australian Nuclear Science and Technology Organisation (ANSTO), PMB1, Menai, NSW, 2234, Australia
| | - Tony G Spassov
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kl.Ohridski", 1 James Bourchier Blvd., 1164, Sofia, Bulgaria
| | | | - Berin A Boughton
- Metabolomics Australia, School of BioSciences, The University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - Spas D Kolev
- School of Chemistry, The University of Melbourne, Melbourne, Victoria, 3010, Australia.
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Yan A, Wang Y, Tan SN, Mohd Yusof ML, Ghosh S, Chen Z. Phytoremediation: A Promising Approach for Revegetation of Heavy Metal-Polluted Land. FRONTIERS IN PLANT SCIENCE 2020; 11:359. [PMID: 32425957 PMCID: PMC7203417 DOI: 10.3389/fpls.2020.00359] [Citation(s) in RCA: 362] [Impact Index Per Article: 90.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 03/12/2020] [Indexed: 05/18/2023]
Abstract
Heavy metal accumulation in soil has been rapidly increased due to various natural processes and anthropogenic (industrial) activities. As heavy metals are non-biodegradable, they persist in the environment, have potential to enter the food chain through crop plants, and eventually may accumulate in the human body through biomagnification. Owing to their toxic nature, heavy metal contamination has posed a serious threat to human health and the ecosystem. Therefore, remediation of land contamination is of paramount importance. Phytoremediation is an eco-friendly approach that could be a successful mitigation measure to revegetate heavy metal-polluted soil in a cost-effective way. To improve the efficiency of phytoremediation, a better understanding of the mechanisms underlying heavy metal accumulation and tolerance in plant is indispensable. In this review, we describe the mechanisms of how heavy metals are taken up, translocated, and detoxified in plants. We focus on the strategies applied to improve the efficiency of phytostabilization and phytoextraction, including the application of genetic engineering, microbe-assisted and chelate-assisted approaches.
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Affiliation(s)
- An Yan
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Yamin Wang
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Swee Ngin Tan
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | | | - Subhadip Ghosh
- Centre for Urban Greenery and Ecology, National Parks Board, Singapore, Singapore
- School of Environmental and Rural Science, University of New England, Armidale, NSW, Australia
| | - Zhong Chen
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Singapore
- M Grass International Institute of Smart Urban Greenology, Singapore, Singapore
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Souza LRR, Pomarolli LC, da Veiga MAMS. From classic methodologies to application of nanomaterials for soil remediation: an integrated view of methods for decontamination of toxic metal(oid)s. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:10205-10227. [PMID: 32064582 DOI: 10.1007/s11356-020-08032-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 02/10/2020] [Indexed: 06/10/2023]
Abstract
Soil pollution with toxic elements is a recurrent issue due to environmental disasters, fossil fuel burning, urbanization, and industrialization, which have contributed to soil contamination over the years. Therefore, the remediation of toxic metals in soil is always an important topic since contaminated soil can affect the environment, agricultural safety, and human health. Many remediation methods have been developed; however, it is essential to ensure that they are safe, and also take into account the limitation of each methodology (including high energy input and generation of residues). This scenario has motivated this review, where we explore soil contamination with arsenic, lead, mercury, and chromium and summarize information about the methods employed to remediate each of these toxic elements such as phytoremediation, soil washing, electrokinetic remediation, and nanoparticles besides elucidating some mechanisms involved in the remediation. Considering all the discussed techniques, nowadays, different techniques can be combined together in order to improve the efficiency of remediation besides the new approach of the techniques and the use of one technique for remediating more than one contaminant.
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50
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H. Kamel A, Hassan AA, Amr AEGE, El-Shalakany HH, A. Al-Omar M. Synthesis and Characterization of CuFe 2O 4 Nanoparticles Modified with Polythiophene: Applications to Mercuric Ions Removal. NANOMATERIALS 2020; 10:nano10030586. [PMID: 32210136 PMCID: PMC7153709 DOI: 10.3390/nano10030586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 12/30/2022]
Abstract
In this research, CuFe2O4 nanoparticles were synthesized by co-precipitation methods and modified by coating with thiophene for removal of Hg(II) ions from aqueous solution. CuFe2O4 nanoparticles, with and without thiophene, were characterized by x-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), energy dispersive x-ray (EDX), high-resolution transmission electron microscopy (HRTEM) and Brunauer-Emmett-Teller (BET). Contact time, adsorbent dose, solution pH, adsorption kinetics, adsorption isotherm and recyclability were studied. The maximum adsorption capacity towards Hg2+ ions was 7.53 and 208.77 mg/g for CuFe2O4 and CuFe2O4@Polythiophene composite, respectively. Modification of CuFe2O4 nanoparticles with thiophene revealed an enhanced adsorption towards Hg2+ removal more than CuFe2O4 nanoparticles. The promising adsorption performance of Hg2+ ions by CuFe2O4@Polythiophene composite generates from soft acid-soft base strong interaction between sulfur group of thiophene and Hg(II) ions. Furthermore, CuFe2O4@Polythiophene composite has both high stability and reusability due to its removal efficiency, has no significant decrease after five adsorption-desorption cycles and can be easily removed from aqueous solution by external magnetic field after adsorption experiments took place. Therefore, CuFe2O4@Polythiophene composite is applicable for removal Hg(II) ions from aqueous solution and may be suitable for removal other heavy metals.
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Affiliation(s)
- Ayman H. Kamel
- Chemistry Department, Faculty of Science, Ain Shams University, Abbasia 11566, Egypt; (A.A.H.); (H.H.E.-S.)
- Correspondence: (A.H.K.); (A.E.-G.E.A.); Tel.: +20-1000743328 (A.H.K.); Tel.: +966-565-148-750 (A.E.-G.E.A.)
| | - Amr A. Hassan
- Chemistry Department, Faculty of Science, Ain Shams University, Abbasia 11566, Egypt; (A.A.H.); (H.H.E.-S.)
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Abd El-Galil E. Amr
- Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
- Applied Organic Chemistry Department, National Research Center, Dokki 12622, Egypt
- Correspondence: (A.H.K.); (A.E.-G.E.A.); Tel.: +20-1000743328 (A.H.K.); Tel.: +966-565-148-750 (A.E.-G.E.A.)
| | - Hadeel H. El-Shalakany
- Chemistry Department, Faculty of Science, Ain Shams University, Abbasia 11566, Egypt; (A.A.H.); (H.H.E.-S.)
| | - Mohamed A. Al-Omar
- Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
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