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Xu T, Wang G, Yin Q, Zhou Z, Deng N. Sulfur/zinc co-doped biochar for stabilization remediation of mercury-contaminated soil: Performance, mechanism and ecological risk. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 281:116601. [PMID: 38896905 DOI: 10.1016/j.ecoenv.2024.116601] [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: 04/07/2024] [Revised: 06/11/2024] [Accepted: 06/13/2024] [Indexed: 06/21/2024]
Abstract
In this study, a novel sulfur/zinc co-doped biochar (SZ-BC) stabilizer was successfully developed for the remediation of mercury-contaminated soil. Results from SEM, TEM, FTIR and XRD revealed that biochar (BC) was successfully modified by sulfur and zinc. In the batch adsorption experiments, the sulfur-zinc co-pyrolysis biochar displayed excellent Hg(II) adsorption performance, with the maximum adsorption capacity of SZ-BC (261.074 mg/g) being approximately 16.5 times that of BC (15.855 mg/g). Laboratory-scale static incubation, column leaching, and plant pot experiments were conducted using biochar-based materials. At an additional dosage of 5 % mass ratio, the SZ-BC exhibits the most effective stabilization of mercury in soil, leading to a significant reduction in leaching loss compared to the control group (CK) by 51.30 %. Following 4 weeks of incubation and 2 weeks of leaching with SZ-BC, the residual mercury in the soil increased by 27.84 %. As a result, potential ecological risk index of mercury decreased by 92 % compared to the CK group. In the pot experiment, SZ-BC significantly enhanced the growth of Chinese cabbage, with biomass and root dry weight reaching 3.20 and 2.80 times that of the CK group, respectively. Additionally, the Translocation Factor (TF) and Bioconcentration Factor (BF) were reduced by 44.86 % and 74.43 %, respectively, in the SZ-BC group compared to the CK group. Moreover, SZ-BC can effectively improve enzyme activities and increase microbial communities in mercury-contaminated soils. The mechanisms of adsorption and stabilization were elucidated through electrostatic adsorption, ion exchange, surface complexation, and precipitation. These findings provide a potentially effective material for stabilizing soils contaminated with mercury.
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Affiliation(s)
- Tianrui Xu
- School of Water Resources & Environmental Engineering, East China University of, Technology, Nanchang 330013, China
| | - Guanghui Wang
- School of Water Resources & Environmental Engineering, East China University of, Technology, Nanchang 330013, China; Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, Nanchang 330013, China.
| | - Qiuling Yin
- School of Water Resources & Environmental Engineering, East China University of, Technology, Nanchang 330013, China
| | - Zhongkui Zhou
- School of Water Resources & Environmental Engineering, East China University of, Technology, Nanchang 330013, China; Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, Nanchang 330013, China
| | - Nansheng Deng
- School of Resources and Environmental Science, Wuhan University, Wuhan 430079, China
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Liu J, Shi J, Zhong M, Wang Y, Zhang X, Wang W, Chen Z, Tan Y, Xu D, Yang S, Li L. A novel electrochemical sensing method based on an amino-functionalized MXene for the rapid and selective detection of Hg 2. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:244-252. [PMID: 38105765 DOI: 10.1039/d3ay01652h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Mercury is a highly toxic element that is widely present in all types of environmental media and can accumulate in living organisms. Prolonged exposure to high levels of mercury can lead to brain damage and death, so the detection of mercury is of great importance. In this study, a cost-effective and easy-to-operate electrochemical sensing method was successfully developed based on an amino-functionalized titanium-based MXene (NH2-Ti3C2Tx) for the rapid and selective detection of Hg2+ that could have a coordination effect with the -NH2 group of NH2-Ti3C2Tx to promote the efficient accumulation of Hg2+. In this strategy, the NH2-Ti3C2Tx was first modified on glassy carbon electrodes (GCE) to fabricate the electrochemical sensor. Benefiting from the excellent electrical conductivity, abundant active sites, and strong adsorption capacity performance of the NH2-Ti3C2Tx, the NH2-Ti3C2Tx modified GCE (NH2-Ti3C2Tx/GCE) exhibited satisfactory selectivity and enhanced square wave anodic stripping voltammetry (SWASV) measurement for the rapid detection of trace amounts of Hg2+ in aqueous solutions. The electrochemical sensor was found to be capable of detecting Hg2+ with a low detection limit of 8.27 nmol L-1 and a linear range of 0.5 μmol L-1 to 50 μmol L-1. The response time of the electrochemical sensing method was 308 s. In addition, the electrochemical sensing method has good selectivity, repeatability and stability, and multiple heavy metal ions have no effect on its detection, with repeatability and stability RSDs of 1.68% and 1.43%, respectively. Furthermore, the analysis of practical water samples demonstrated that the developed method was highly practical for the actual determination of Hg2+ with recoveries in the range of 99.22-101.90%.
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Affiliation(s)
- Jinquan Liu
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Jiao Shi
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Miao Zhong
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Yating Wang
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Xinxin Zhang
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Wenyu Wang
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Zhijun Chen
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Yan Tan
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Dongyun Xu
- Hengyang Center for Disease Control and Prevention, Hengyang, Hunan, 421001, People's Republic of China
| | - Shengyuan Yang
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
| | - Le Li
- Department of Health Inspection and Quarantine, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
- Hunan Key Laboratory of Typical Environment Pollution and Health Hazards, University of South China, Hengyang 421001, People's Republic of China
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Gomes PR, Pestana IA, de Almeida MG, de Rezende CE. The Paraíba do Sul River Basin and its coastal area as a study model of the mercury cycle: A meta-analytical review of three decades of research. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132442. [PMID: 37683351 DOI: 10.1016/j.jhazmat.2023.132442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/05/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023]
Abstract
The Paraíba do Sul River (PSR) Basin is a crucial drainage basin in Southeast Brazil, being the most industrialized and densely populated region in the country. Over the last three decades, the basin has been the subject of numerous studies due to its long history of mercury (Hg) contamination. This makes the PSR Basin an excellent model to evaluate Hg cycling, which is a priority for signatory countries of the Minamata Convention, which includes Brazil. This review compiled data on Hg from five environmental compartments (animals, plants, sediment, suspended particulate matter (SPM), and water), three different sectors (upper, middle, and lower) and five different ecosystems (reservoir, mangrove, fluvial, estuarine, and coastal) from 60 published studies, aiming to understand the Hg cycling through meta-analyses. The highest concentrations of Hg were observed in the upper and middle sectors of the basin, which are areas with high industrialization and urbanization levels. Among the evaluated ecosystems, hydropower reservoirs showed the highest medians and were also frequent in the upper and middle portions of the PSR basin. Over the years, all environmental compartments showed a decline in Hg concentrations due to the implementation of federal and state environmental policies. The main source of Hg for the basin was Hg-rich soils from past activities (such as artisanal small-scale gold mining and the use of organomercurial fungicides in sugarcane plantations). These results can assist decision-makers in the management of the basin's ecosystems and can also be used to evaluate the effectiveness of implementing the Minamata Convention in the region.
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Affiliation(s)
- Philipe Ribeiro Gomes
- Programa de Pós-Graduação em Ecologia e Recursos Naturais, Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000 - Parque Califórnia - CEP: 28013-602, Campos dos Goytacazes, Rio de Janeiro, Brazil.
| | - Inácio Abreu Pestana
- Programa de Pós-Graduação em Ecologia e Recursos Naturais, Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000 - Parque Califórnia - CEP: 28013-602, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - Marcelo Gomes de Almeida
- Programa de Pós-Graduação em Ecologia e Recursos Naturais, Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000 - Parque Califórnia - CEP: 28013-602, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - Carlos Eduardo de Rezende
- Programa de Pós-Graduação em Ecologia e Recursos Naturais, Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000 - Parque Califórnia - CEP: 28013-602, Campos dos Goytacazes, Rio de Janeiro, Brazil
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Anetor GO, Nwobi NL, Igharo GO, Sonuga OO, Anetor JI. Environmental Pollutants and Oxidative Stress in Terrestrial and Aquatic Organisms: Examination of the Total Picture and Implications for Human Health. Front Physiol 2022; 13:931386. [PMID: 35936919 PMCID: PMC9353710 DOI: 10.3389/fphys.2022.931386] [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: 04/28/2022] [Accepted: 06/24/2022] [Indexed: 11/13/2022] Open
Abstract
There is current great international concern about the contribution of environmental pollution to the global burden of disease particularly in the developing, low- and medium-income countries. Industrial activities, urbanization, developmental projects as well as various increased anthropogenic activities involving the improper generation, management and disposal of pollutants have rendered today’s environment highly polluted with various pollutants. These pollutants include toxic metals (lead, cadmium, mercury, arsenic), polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides and diesel exhaust particles most of which appear to be ubiquitous as well as have long-term environmental persistence with a wide range of toxicities such as oxidative stress among others. Oxidative stress, which may arise from increased production of damaging free radicals emanating from increased pollutant burden and depressed bioavailability of antioxidant defenses causes altered biochemical and physiological mechanisms and has been implicated in all known human pathologies most of which are chronic. Oxidative stress also affects both flora and fauna and plants are very important components of the terrestrial environment and significant contributors of nutrients for both man and animals. It is also remarkable that the aquatic environment in which sea animals and creatures are resident is also highly polluted, leading to aquatic stress that may affect the survival of the aquatic animals, sharing in the oxidative stress. These altered terrestrial and aquatic environments have an overarching effect on human health. Antioxidants neutralize the damaging free radicals thus, they play important protective roles in the onset, progression and severity of the unmitigated generation of pollutants that ultimately manifest as oxidative stress. Consequently, human health as well as that of aquatic and terrestrial organisms may be protected from environmental pollution by mitigating oxidative stress and employing the principles of nutritional medicine, essentially based on antioxidants derived mainly from plants, which serve as the panacea of the vicious state of environmental pollutants consequently, the health of the population. Understanding the total picture of oxidative stress and integrating the terrestrial and aquatic effects of environmental pollutants are central to sustainable health of the population and appear to require multi-sectoral collaborations from diverse disciplinary perspectives; basically the environmental, agricultural and health sectors.
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Affiliation(s)
- Gloria Oiyahumen Anetor
- Department of Human Kinetics and Health Education, National Open University of Nigeria, Abuja, Nigeria
| | - Nnenna Linda Nwobi
- Department of Chemical Pathology, BenCarson School of Medicine, Babcock University, Ilishan, Nigeria
| | - Godwin Osaretin Igharo
- Department of Medical Laboratory Science, School of Basic Medical Sciences, College of Medical Sciences, University of Benin, Benin, Nigeria
| | | | - John Ibhagbemien Anetor
- Department of Chemical Pathology, College of Medicine, University of Ibadan, Ibadan, Nigeria
- *Correspondence: John Ibhagbemien Anetor,
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Chan MWH, Hasan KA, Balthazar-Silva D, Mirani ZA, Asghar M. Evaluation of heavy metal pollutants in salt and seawater under the influence of the Lyari River and potential health risk assessment. MARINE POLLUTION BULLETIN 2021; 166:112215. [PMID: 33684706 DOI: 10.1016/j.marpolbul.2021.112215] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 02/16/2021] [Accepted: 02/24/2021] [Indexed: 06/12/2023]
Abstract
Heavy metals intoxication through edible salt poses serious health hazards. The conducted research assessed the levels of heavy metals, health risks of salt samples, and the pollution index of seawater obtained from saltpans located at Sandpit, Karachi, Pakistan, which receive untreated effluents through the Lyari River. Seawater (n = 27) and salt samples (n = 27) were prepared for the detection of Al, Cd, Pb, Cr, Fe, Cu, Hg, Ni, As and Zn through atomic absorption spectroscopy, mean concentrations ± S.D. (mg/mL) were compared with the National Environmental Quality Standards, Pakistan. The levels of Cr (40.06 ± 0.21) were the highest followed by Fe (39.77 ± 0.08) > As (25.12 ± 0.21) > Ni > Pb > Al > Hg > Zn > Cd > Cu. In sea salt (Mean ± S·D mg/Kg), the Cr (47.79 ± 0.19), Fe (47.5 ± 0.15), As (30.62 ± 0.22), and Ni were redundant elements followed by Al > Pb > Hg > Zn > Cu > Cd. The water comprehensive pollution index was 1000 times greater than the critical values. The single factor pollution index was highest for Hg (1321), followed by Cr (40), Ni (36), Pb (32), Al (31.4), Cd (31.3), and As (25). Health risk assessment indices (from salt samples), including target hazard quotient (THQ) for As, Pb, Al, Hg, and Cr were two to six times higher than the noncarcinogenic THQ reference range. Similarly, the hazardous index indicated that salt was 20 times hazardous (HI = 20.29), and the carcinogenic rate index for the heavy metals i.e., Cd, As, Cr, and Ni was above the reference CR value i.e., 1 × 10-4. In conclusion, the experimental and theoretical approaches recommend that the use of contaminated salt may impart health hazards.
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Affiliation(s)
| | - Khwaja Ali Hasan
- Department of Biochemistry, Faculty of Science, University of Karachi, Karachi 75270, Pakistan
| | - Danilo Balthazar-Silva
- Instituto de Ciências da Saúde, Universidade Paulista, Campus Jundiaí, São Paulo, Brazil; Laboratório de Manejo, Ecologia e Conservação Marinha, Instituto Oceanográfico, USP, São Paulo, Brazil
| | | | - Muhammad Asghar
- Department of Chemistry, University of Engineering and Technology, Lahore 54890, Pakistan
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Jonidi Jafari A, Esrafili A, Moradi Y, Mahmoudi N. Mercury level in biological samples of dentists in Iran: a systematic review and meta-analysis. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2020; 18:1655-1669. [PMID: 33312669 PMCID: PMC7721756 DOI: 10.1007/s40201-020-00558-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 09/29/2020] [Indexed: 05/09/2023]
Abstract
Exposure to mercury is an important risk to dentists health. The aim of the present study was to assess the pooled mean mercury level (MML) in the urine, blood, nail, and hair of Iranian dentists (IDs) through the meta-analysis technique. Comprehensive and systematic searches were performed in main local databases including SID, Magiran, Iran medex, and ISC as well as internationally available databases including Embase, PubMed and Scopus for all the relevant studies up to 2018. In order to prevent bias in this study and identify eligible studies, various steps of the study was performed independently by two researchers. Out of 13 studies in the meta-analysis process which included 1499 IDs, the mean of the mercury level in the urine, nail, and blood was estimated to be 6.29 (95% CI: 2.61-9.97, I-square: 62.7%, P: 0.006), 3.54 (95% CI: 2.81-4.28, I-square: 0.0%, P: 0.968), 11.20 (95% CI: 2.28-20.13, I-square: 59.9%, P: 0.082), respectively. The mean mercury level (MML) in the biological samples of IDs was higher than the standard of World Health Organization (WHO). So, in accordance with Article 10 of the European Union Regulations (EUR), in the context of the Minamata Convention (MC) on Dental Amalgam (DA), in order to avoid the dangers of mercury exposure in dentists, it is necessary for Iran and other countries to approve laws and to implement a national plan to reduce mercury levels and replace the appropriate materials.
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Affiliation(s)
- Ahmad Jonidi Jafari
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Esrafili
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Yousef Moradi
- Department of Epidemiology, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Norouz Mahmoudi
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
- Health Research Center, Life style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
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