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Monroy-Licht A, Carranza-Lopez L, De la Parra-Guerra AC, Acevedo-Barrios R. Unlocking the potential of Eichhornia crassipes for wastewater treatment: phytoremediation of aquatic pollutants, a strategy for advancing Sustainable Development Goal-06 clean water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:43561-43582. [PMID: 38918295 PMCID: PMC11252183 DOI: 10.1007/s11356-024-33698-9] [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: 08/01/2023] [Accepted: 05/13/2024] [Indexed: 06/27/2024]
Abstract
The 2030 Agenda, established in 2015, contains seventeen Sustainable Development Goals (SDGs) aimed at addressing global challenges. SDG-06, focused on clean water, drives the increase in basic sanitation coverage, the management of wastewater discharges, and water quality. Wastewater treatment could contribute to achieving 11 of the 17 SDGs. For this purpose, phytoremediation is a low-cost and adaptable alternative to the reduction and control of aquatic pollutants. The objective of this study is to highlight the role of macrophytes in the removal and degradation of these compounds, focusing on Eichhornia crassipes (Mart.) Solms, commonly known as water hyacinth. The reported values indicate that this plant has a removal capacity of over 70% for metals such as copper, aluminum, lead, mercury, cadmium, and metalloids such as arsenic. Additionally, it significantly improves water quality parameters such as turbidity, suspended solids, pH, dissolved oxygen, and color. It also reduces the presence of phosphates, and nitrogen compounds to values below 50%. It also plays a significant role in the removal of organic contaminants such as pesticides, pharmaceuticals, and dyes. This study describes several valuable by-products from the biomass of the water hyacinth, including animal and fish feed, energy generation (such as briquettes), ethanol, biogas, and composting. According to the analysis carried out, E. crassipes has a great capacity for phytoremediation, which makes it a viable solution for wastewater management, with great potential for water ecosystem restoration.
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Affiliation(s)
- Andrea Monroy-Licht
- Chemistry and Biology Group, Chemistry and Biology Department, Universidad del Norte, 081007, Barranquilla, Colombia.
| | - Liliana Carranza-Lopez
- Medicine and Biotechnology Research Group, School of Health Sciences, Universidad Libre Sectional Barranquilla, Bacteriology Program, 080016, Barranquilla, Colombia
| | - Ana C De la Parra-Guerra
- Department of Natural and Exact Sciences, Universidad de La Costa, 080002, Barranquilla, Colombia
- Colombian Caribbean Biodiversity Research Group, Faculty of Basic Sciences, Universidad del Atlántico, 081001, Barranquilla, Colombia
| | - Rosa Acevedo-Barrios
- Grupo de Investigación de Estudios Químicos y Biológicos, Facultad de Ciencias Básicas, Universidad Tecnológica de Bolívar, 130010, Cartagena, Colombia
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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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Kung HC, Wu CH, Huang BW, Chang-Chien GP, Mutuku JK, Lin WC. Mercury abatement in the environment: Insights from industrial emissions and fates in the environment. Heliyon 2024; 10:e28253. [PMID: 38571637 PMCID: PMC10987932 DOI: 10.1016/j.heliyon.2024.e28253] [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: 10/29/2023] [Revised: 03/14/2024] [Accepted: 03/14/2024] [Indexed: 04/05/2024] Open
Abstract
Mercury's neurotoxic effects have prompted the development of advanced control and remediation methods to meet stringent measures for industries with high-mercury feedstocks. Industries with significant Hg emissions, including artisanal and small-scale gold mining (ASGM)-789.2 Mg year-1, coal combustion-564.1 Mg year-1, waste combustion-316.1 Mg year-1, cement production-224.5 Mg year-1, and non-ferrous metals smelting-204.1 Mg year-1, use oxidants and adsorbents capture Hg from waste streams. Oxidizing agents such as O3, Cl2, HCl, CaBr2, CaCl2, and NH4Cl oxidize Hg0 to Hg2+ for easier adsorption. To functionalize adsorbents, carbonaceous ones use S, SO2, and Na2S, metal-based adsorbents use dimercaprol, and polymer-based adsorbents are grafted with acrylonitrile and hydroxylamine hydrochloride. Adsorption capacities span 0.2-85.6 mg g-1 for carbonaceous, 0.5-14.8 mg g-1 for metal-based, and 168.1-1216 mg g-1 for polymer-based adsorbents. Assessing Hg contamination in soils and sediments uses bioindicators and stable isotopes. Remediation approaches include heat treatment, chemical stabilization and immobilization, and phytoremediation techniques when contamination exceeds thresholds. Achieving a substantially Hg-free ecosystem remains a formidable challenge, chiefly due to the ASGM industry, policy gaps, and Hg persistence. Nevertheless, improvements in adsorbent technologies hold potential.
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Affiliation(s)
- Hsin-Chieh Kung
- Institute of Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
| | - Chien-Hsing Wu
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang-Gung Memorial Hospital, Kaohsiung, 83301, Taiwan
- Center for General Education, Cheng Shiu University, Kaohsiung 833301, Taiwan
| | - Bo-Wun Huang
- Department of Mechanical and Institute of Mechatronic Engineering, Cheng Shiu University, Kaohsiung City, 833301, Taiwan
| | - Guo-Ping Chang-Chien
- Institute of Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Super micro mass research and technology center, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
| | - Justus Kavita Mutuku
- Institute of Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Super micro mass research and technology center, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
| | - Wan-Ching Lin
- Department of Neuroradiology, E-Da Hospital, I-Shou University, Kaohsiung, 84001, Taiwan
- Department of Neurosurgery, E-Da Hospital/I-Shou University, Kaohsiung, 84001, Taiwan
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Radojević I, Jakovljević V, Grujić S, Ostojić A, Ćirković K. Biofilm formation by selected microbial strains isolated from wastewater and their consortia: mercury resistance and removal potential. Res Microbiol 2024; 175:104092. [PMID: 37331492 DOI: 10.1016/j.resmic.2023.104092] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/30/2023] [Accepted: 06/04/2023] [Indexed: 06/20/2023]
Abstract
Wastewater often contains an increased amount of mercury and, at the same time, resistant microorganisms. During wastewater treatment, a biofilm of indigenous microorganisms is often unavoidable. Therefore, the objective of this research is to isolate and identify microorganisms from wastewater and investigate their ability to form biofilms for possible application in mercury removal processes. The resistance of planktonic cells and their biofilms to the effects of mercury was investigated using Minimum Biofilm Eradication Concentration-High Throughput Plates. The formation of biofilms and the degree of resistance to mercury were confirmed in polystyrene microtiter plates with 96 wells. Biofilm on AMB Media carriers (Assisting Moving Bad Media) was quantified using the Bradford protein assay. The removal of mercury ions by biofilms formed on AMB Media carriers of selected isolates and their consortia was determined by a removal test in Erlenmeyer flasks simulating MBBR. All isolates in planktonic form showed some degree of resistance to mercury. The most resistant microorganisms (Enterobacter cloacae, Klebsiella oxytoca, Serratia odorifera, and Saccharomyces cerevisiae) were tested for their ability to form biofilms in the presence and absence of mercury, both in polystyrene plates and on ABM carriers. The results showed that among planktonic forms, K. oxytoca was the most resistant. A biofilm of the same microorganisms was more than 10-fold resistant. Most consortia biofilms had MBEC values > 100,000 μg/mL. Among individual biofilms, E. cloacae showed the highest mercury removal efficiency (97.81% for 10 days). Biofilm consortia composed of three species showed the best ability to remove mercury (96.64%-99.03% for 10 days). This study points to the importance of consortia of different types of wastewater microorganisms in the form of biofilms and suggests that they can be used to remove mercury in wastewater treatment bioreactors.
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Affiliation(s)
- Ivana Radojević
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology, Laboratory of Microbiology, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
| | - Violeta Jakovljević
- State University of Novi Pazar, Department of Natural-Mathematical Sciences, Vuka Karadžića 9, 36300 Novi Pazar, Republic of Serbia.
| | - Sandra Grujić
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology, Laboratory of Microbiology, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
| | - Aleksandar Ostojić
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology, Laboratory of Microbiology, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
| | - Katarina Ćirković
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology, Laboratory of Microbiology, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
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Thanigaivel S, Vinayagam S, Gnanasekaran L, Suresh R, Soto-Moscoso M, Chen WH. Environmental fate of aquatic pollutants and their mitigation by phycoremediation for the clean and sustainable environment: A review. ENVIRONMENTAL RESEARCH 2024; 240:117460. [PMID: 37866533 DOI: 10.1016/j.envres.2023.117460] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/30/2023] [Accepted: 10/19/2023] [Indexed: 10/24/2023]
Abstract
Emerging pollutants such as natural and manufactured chemicals, insecticides, pesticides, surfactants, and other biological agents such as personal care products, cosmetics, pharmaceuticals, and many industrial discharges hamper the aquatic environment. Nanomaterials and microplastics, among the categories of pollutants, can directly interfere with the marine ecosystem and translate into deleterious effects for humans and animals. They are either uncontrolled or poorly governed. Due to their known or suspected effects on human and environmental health, some chemicals are currently causing concern. The aquatic ecology is at risk from these toxins, which have spread worldwide. This review assesses the prevalence of emerging and hazardous pollutants that have effects on aquatic ecosystems and contaminated water bodies and their toxicity to non-target organisms. Microalgae are found to be a suitable source to remediate the above-mentioned risks. Microalgae based mitigation techniques are currently emerging approaches for all such contaminants, including the other categories that are discussed above. These studies describe the mechanism of phycoremediation, provide outrage factors that may significantly affect the efficiency of contaminants removal, and discuss the future directions and challenges of microalgal mediated remediations.
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Affiliation(s)
- S Thanigaivel
- Department of Biotechnology, Faculty of Science & Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Tamil Nadu, 603203, India
| | - Saranya Vinayagam
- Department of Biosciences, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, 602105, India
| | - Lalitha Gnanasekaran
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez 1775, Arica, Chile.
| | - R Suresh
- Department of Chemistry, Karpagam Academy of Higher Education, Coimbatore, 641021, Tamil Nadu, India; Centre for Material Chemistry, Karpagam Academy of Higher Education, Coimbatore, 641021, Tamil Nadu, India
| | | | - Wei-Hsin Chen
- Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung, 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung, 411, Taiwan
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6
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Li W, Zhang WG, Zhang MS, Lei ZF, Li PF, Ma Y, Gao Y. Environmentally relevant concentrations of mercury facilitate the horizontal transfer of plasmid-mediated antibiotic resistance genes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158272. [PMID: 36028018 DOI: 10.1016/j.scitotenv.2022.158272] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/20/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
Abundant antibiotic resistance genes (ARGs) are typically found in mercury (Hg)-contaminated aquatic environments. This phenomenon is partly attributed to the co-resistance, cross-resistance, and shared regulatory responses to Hg and antibiotics. However, it remains unclear whether and how Hg influences the conjugative transfer of ARGs mediated by mobilizable plasmids. In the present study, we found that Hg2+ at the environmentally relevant concentrations (0.001-0.5 mg L-1) facilitated the conjugative transfer of ARGs through the mobilizable plasmid RP4 from the donor Escherichia coli HB101 to the recipient E. coli K12. Exposure to Hg2+ significantly increases the formation of reactive oxygen species, malondialdehyde production, antioxidant enzyme activities, and cell membrane permeability, while decreasing the concentration of glutathione. Scanning electron microscopy and transmission electron microscopy showed that the cell membrane suffered from oxidative damage, which is beneficial for conjugative transfer. The expression of global regulatory genes (korA, korB, and trbA) negatively regulating conjugative transfer was restrained by Hg2+, while promoting the expression of positive regulatory genes involved in the mating pair formation system (trbBp and traF) and the DNA transfer and replication systems (trfAp and traJ). Although a high Hg2+ concentration (1.0 mg L-1) suppressed ARGs conjugative transfer, our results suggest that Hg2+ facilitates the dissemination of ARGs in aquatic environments at environmentally relevant concentrations. This study improves our understanding of ARGs dissemination in Hg-contaminated aquatic environments.
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Affiliation(s)
- Wen Li
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing 210014, China; School of Life Sciences, Nanjing University, Nanjing 210093, China
| | - Wei-Guo Zhang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing 210014, China; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8577, Japan; China Ministry of Agriculture Key Laboratory at Yangtze River Plain for Agricultural Environment, Nanjing 210014, China.
| | - Ming-Sha Zhang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhong-Fang Lei
- School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Peng-Fu Li
- School of Life Sciences, Nanjing University, Nanjing 210093, China
| | - Yan Ma
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; National Agricultural Experimental Station for Agricultrual Environment, Luhe, Nanjing 210014, China
| | - Yan Gao
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
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7
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Enzymatic pretreatment mitigates the dissemination of antibiotic resistance genes via regulating microbial populations and gene expressions during food waste fermentation. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Zhu Y, Zhang M, Zhang L, Law CL, Wang Y, Liu K. Preparation of enzymatic hydrolysate using edible fungi by-products of soup seasoning: Effect of different enzymes on enzymatic hydrolysis. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Fan Q, Bao GM, Li SH, Liu SY, Cai XR, Xia YF, Li W, Wang XY, Deng K, Yuan HQ. A dual-channel "on-off-on" fluorescent probe for the detection and discrimination of Fe 3+ and Hg 2+ in piggery feed and swine wastewater. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2318-2328. [PMID: 35639468 DOI: 10.1039/d2ay00629d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Blue-fluorescent blood-CDs were synthesized through a one-pot hydrothermal method using a mixture of chicken blood and trisodium citrate and then explored as a fluorescent probe for detecting Fe3+ and Hg2+. The probe showed excellent selectivity and sensitivity towards Fe3+ and Hg2+ with a dramatic "on-off" fluorescence response. F- recovered the fluorescence quenching by Fe3+, and Al3+ recovered the fluorescence quenching by Hg2+, showing an "off-on" fluorescence response. The blood-CDs were used as an "on-off-on" dual-channel fluorescent sensor for the detection and discrimination of Fe3+ and Hg2+ ions. The probe showed wide linear ranges for determination of Fe3+ (0-100 μM) and Hg2+ (0-120 μM) with low detection limits of 0.23 μM for Fe3+ and 0.17 μM for Hg2+. This probe was practically applied for the determination of Fe3+ and Hg2+ in piggery feed and wastewater with good recoveries. This work provides a fluorescent probe for the quantification of Fe3+ and Hg2+ in livestock feed and environmental water samples.
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Affiliation(s)
- Qing Fan
- Institute of Veterinary Drug/Biotechnological Engineering Center for Pharmaceutical Research and Development, Jiangxi Agricultural University, Nanchang 330045, PR China
- College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, PR China.
| | - Guang-Ming Bao
- Institute of Veterinary Drug/Biotechnological Engineering Center for Pharmaceutical Research and Development, Jiangxi Agricultural University, Nanchang 330045, PR China
- School of Biological Engineering and Food, Hubei University of Technology, Wuhan 430068, PR China
| | - Si-Han Li
- Institute of Veterinary Drug/Biotechnological Engineering Center for Pharmaceutical Research and Development, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Si-Yi Liu
- Institute of Veterinary Drug/Biotechnological Engineering Center for Pharmaceutical Research and Development, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Xin-Ru Cai
- Institute of Veterinary Drug/Biotechnological Engineering Center for Pharmaceutical Research and Development, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Yi-Fan Xia
- College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, PR China.
| | - Wei Li
- College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, PR China.
| | - Xiao-Ying Wang
- Institute of Veterinary Drug/Biotechnological Engineering Center for Pharmaceutical Research and Development, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Ke Deng
- Institute of Veterinary Drug/Biotechnological Engineering Center for Pharmaceutical Research and Development, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Hou-Qun Yuan
- College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, PR China.
- School of Biological Engineering and Food, Hubei University of Technology, Wuhan 430068, PR China
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Al-Ansari MM. Biodetoxification mercury by using a marine bacterium Marinomonas sp. RS3 and its merA gene expression under mercury stress. ENVIRONMENTAL RESEARCH 2022; 205:112452. [PMID: 34856165 DOI: 10.1016/j.envres.2021.112452] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 11/21/2021] [Accepted: 11/24/2021] [Indexed: 06/13/2023]
Abstract
Mercury (Hg) pollution in water has been a problem for the ecosystem and human health, thus eco-friendly remediation methods are gaining traction around the world. In this study, a bacterial strain designated as RS3 isolated from the Red Sea (Saudi Arabia) has shown tolerance to more than 250 mg/L of Hg2+ on minimum inhibitory studies. The isolate RS3 was identified as Marinomonas sp., (Accession No: OK271312) using 16s rRNA sequencing. Tracing the growth curve for the RS3 showed that maximum growth attained at 72 h and only 10% reduction than the control medium for 50 mg/L HgCl2 supplemented seawater medium, which continued to reduce as 21% to 60 with the increment of HgCl2 from 100 to 350 mg/L. The Hg2+ removal potential of RS3 is observed to be 78% at 50 mg/L HgCl2/72 h, which is significantly altered with the addition of carbon source such as glucose (84.5%) > fructose (79.8%) > control (78%) > citrate (73.4%) > acetate (60.2%) > maltose (54.7%). Box-Behnken design (BBD) well proposed a model with R2 value of 0.8922, which predict a utmost Hg2+ removal of 89.5% by RS2 at favorable conditions (pH-7; NaC 1% and glucose 5%) at 72 h. Mercuric reductase enzyme encoded merA gene expression was found to be high in RS3 isolates cultivated in 100 mg/L of HgCl2 in comparison with other variables. Thus the seawater isolate Marinomonas sp. RS3 expressed a significant tolerance and removal potential towards the Hg2+, which would make it is a noteworthy applicant for effective mercury remediation practices.
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Affiliation(s)
- Mysoon M Al-Ansari
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
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11
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Chang J, Peng D, Deng S, Chen J, Duan C. Efficient treatment of mercury(Ⅱ)-containing wastewater in aerated constructed wetland microcosms packed with biochar. CHEMOSPHERE 2022; 290:133302. [PMID: 34922958 DOI: 10.1016/j.chemosphere.2021.133302] [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: 09/11/2021] [Revised: 12/09/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
Effective removal of mercury (Hg) pollutants from contaminated water/wastewater to prevent severe environmental pollution is of great significance due to the extremely high toxicity of Hg. In this study, granular biochar and gravel (control) were packed into intermittently aerated constructed wetland (CW) microcosms to treat Hg(Ⅱ)-containing wastewater over 100 d. The results showed that the biochar-filled CWs exhibited notably better Hg(Ⅱ) removal than the gravel systems by facilitating chemical and microbial Hg(Ⅱ) reduction and volatilization and promoting plant growth and Hg assimilation. More than ten times more Hg was absorbed by the plants (L. salicaria) in biochar CWs than in the gravel systems, with the roots acting as the major sink. In contrast, substrate binding in a predominantly oxidizable fraction was the dominant pathway for Hg removal in the gravel CWs. Biochar substrates also exhibited higher levels of COD, N and P removal, and Hg(Ⅱ) import impacted the removal of these pollutants only slightly. Filling material played a more crucial role than Hg input in shaping the microbial communities in the CWs. The proportions of some dominant genera, including Arenimonas, Lysobacter, Micropruina and Hydrogenophaga, increased in the presence of Hg, implying their tolerance to Hg toxicity and potential roles in Hg detoxification in the CWs. Granular biochar-based CW has high potential for treating Hg(Ⅱ)-contaminated wastewater.
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Affiliation(s)
- Junjun Chang
- School of Ecology and Environmental Science & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650500, China
| | - Dongliang Peng
- School of Architecture and Planning, Yunnan University, Kunming, 650500, China
| | - Shengjiong Deng
- School of Ecology and Environmental Science & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650500, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming, 650500, China
| | - Jinquan Chen
- School of Ecology and Environmental Science & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650500, China.
| | - Changqun Duan
- School of Ecology and Environmental Science & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650500, China.
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Pei L, Yang H, Chen S, Wang L. UiO-66-NHC(S)NHMe/Three-Dimensional Macroporous Carbon for Removal and Electrochemical Detection of Cd2+, Pb2+, Cu2+, and Hg2+. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Longsheng Pei
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Hanlun Yang
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Shouhui Chen
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Li Wang
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
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Patel N, Shahane S, Bhunia B, Mishra U, Chaudhary VK, Srivastav AL. Biodegradation of 4-chlorophenol in batch and continuous packed bed reactor by isolated Bacillus subtilis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113851. [PMID: 34597952 DOI: 10.1016/j.jenvman.2021.113851] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 09/24/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
In present work, biodegradation of 4-Chlorophenol (4-CP) has been successfully achieved using bacteria i.e. Bacillus subtilis (MF447841.1), which was isolated from the wastewater of a nearby drain of Hyundai Motor Company service centre, Agartala, Tripura (India). Geonomic identification was carried out by 16 S rDNA technique and phylogenetic processes. Both, batch and column mode of experiments were performed to optimize various parameters (initial concentration, contact time, dosages etc.) involved in the significant biodegradation of 4-CP. Based on R2 value (0.9789), the Levenspiel's model was found to be best fit than others. The kinetic parameters; specific growth rate (μ), yield of cell mass (YX/S), and saturation constant (KS), were obtained as 0.6383 (h-1), 0.35 (g/g), and 0.006884 (g/L), respectively. The isolated strain has shown the ability of degrading 4-CP up to 1000 mg/L initial concentration within 40 h. Bacterial strain was immobilized via developing calcium alginate beads along by optimizing weight proportion of calcium chloride and sodium alginate and size of the bead for further experiments. Various process parameters i.e. initial feed concentration, bed height, rate of flow of were optimized during packed bed reactor (PBR) study. Maximum biodegradation efficiency of 4-CP was observed as 45.39% at initial concentration of 500 mg/L within 105 min, using 2 mm size of immobilized beads which were formed using 3.5% w/v of both calcium chloride and sodium alginate within. Thus, Bacillus subtilis (MF447841.1) could be used for biological remediation of 4-CP pollutant present in wastewater. Moreover, because of affordable and eco-friendly nature of water treatment, relatively it has the better scope of commercialization.
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Affiliation(s)
- Naveen Patel
- Department of Civil Engineering, National Institute of Technology, Agartala, Tripura, India; Department of Civil Engineering, Institute of Engineering & Technology, Dr. Ram Manohar Lohia Awadh University, Ayodhya, 224001, Uttar Pradesh, India
| | - Shraddha Shahane
- Department of Civil Engineering, National Institute of Technology, Agartala, Tripura, India
| | - Biswanath Bhunia
- Department of Bio Engineering, National Institute of Technology, Agartala, Tripura, India.
| | - Umesh Mishra
- Department of Civil Engineering, National Institute of Technology, Agartala, Tripura, India
| | - Vinod Kumar Chaudhary
- Department of Environmental Sciences, Dr. Ram Manohar Lohia Awadh University, Ayodhya, Uttar Pradesh, India
| | - Arun Lal Srivastav
- Chitkara University School of Engineering and Technology, Chitkara University, Himachal Pradesh, 174103, India.
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