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Sandaruwan C, Adikaram M, Madugalla N, Pitawala A, Ishiga H. Human and environmental risk assessment and plausible sources of toxic heavy metals at beach placers in southeast Sri Lanka. MARINE POLLUTION BULLETIN 2024; 208:117007. [PMID: 39357367 DOI: 10.1016/j.marpolbul.2024.117007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 09/08/2024] [Accepted: 09/14/2024] [Indexed: 10/04/2024]
Abstract
Beach placers are typically rich in heavy minerals, which are crucial for a wide range of industrial applications. This study investigates the human and environmental risks posed by toxic heavy metals (As, Pb, Zn, Cu, Cr, Fe, V and Mn) in beach placers of southeastern Sri Lanka using 42 X-ray fluorescence data. Risk indicators (EF, Igeo, CF and PLI) indicate the polluted nature of the placers. Correlation analysis (correlation matrix and HCA) identified pollution sources as heavy mineral-rich rocks, agricultural fertilizers, pesticides and municipal wastes. The environmental impact caused by toxic metals is less in placers. The highest non-carcinogenic risks (HI) resulted by Cr (1.69E+00), V (4.29E+00) and Fe (2.06E+00) to children. The total cancer risk of As and Cr in placers is unacceptable (children: 2.60E-04, 2.48E-03, and adults: 3.14E-05, 2.87E-04, respectively). Different strategies are introduced to mitigate the identified risks in source areas and the coastal environment.
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Affiliation(s)
- Chaturanga Sandaruwan
- Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Madurya Adikaram
- Department of Physical Sciences, Faculty of Applied Sciences, South Eastern University, Sammanthurai, 32200, Sri Lanka
| | - Nadeesha Madugalla
- Department of Physical Sciences, Faculty of Applied Sciences, South Eastern University, Sammanthurai, 32200, Sri Lanka.
| | - Amarasooriya Pitawala
- Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Hiroaki Ishiga
- Department of Geosciences, Graduate School of Science and Engineering, Shimane University, Japan
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2
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Abdelhadi AA, Elarabi NI, Ibrahim SM, Abdel-Maksoud MA, Abdelhaleem HAR, Almutairi S, Malik A, Kiani BH, Henawy AR, Halema AA. Hybrid-genome sequence analysis of Enterobacter cloacae FACU and morphological characterization: insights into a highly arsenic-resistant strain. Funct Integr Genomics 2024; 24:174. [PMID: 39320439 DOI: 10.1007/s10142-024-01441-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2024] [Revised: 08/28/2024] [Accepted: 09/03/2024] [Indexed: 09/26/2024]
Abstract
Many organisms have adapted to survive in environments with high levels of arsenic (As), a naturally occurring metalloid with various oxidation states and a common element in human activities. These organisms employ diverse mechanisms to resist the harmful effects of arsenic compounds. Ten arsenic-resistant bacteria were isolated from contaminated wastewater in this study. The most efficient bacterial isolate able to resist 15,000 ppm Na2HAsO4·7H2O was identified using the 16S rRNA gene and whole genome analysis as Enterobacter cloacae FACU. The arsenic E. cloacae FACU biosorption capability was analyzed. To further unravel the genetic determinants of As stress resistance, the whole genome sequence of E. cloacae FACU was performed. The FACU complete genome sequence consists of one chromosome (5.7 Mb) and two plasmids, pENCL 1 and pENCL 2 (755,058 and 1155666 bp, respectively). 7152 CDSs were identified in the E. cloacae FACU genome. The genome consists of 130 genes for tRNA and 21 for rRNAs. The average G + C content was found to be 54%. Sequencing analysis annotated 58 genes related to resistance to many heavy metals, including 16 genes involved in arsenic efflux transporter and arsenic reduction (five arsRDABC genes) and 42 genes related to lead, zinc, mercury, nickel, silver, copper, cadmium and chromium in FACU. Scanning electron microscopy (SEM) confirmed the difference between the morphological responses of the As-treated FACU compared to the control strain. The study highlights the genes involved in the mechanism of As stress resistance, metabolic pathways, and potential activity of E. cloacae FACU at the genetic level.
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Affiliation(s)
- Abdelhadi A Abdelhadi
- Department of Genetics, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt.
| | - Nagwa I Elarabi
- Department of Genetics, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt.
| | - Saifeldeen M Ibrahim
- Biotechnology Department, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
- Bioinformatics Department, Agricultural Genetic Engineering Research Institute, ARC, Giza, Egypt
| | - Mostafa A Abdel-Maksoud
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Heba A R Abdelhaleem
- College of Biotechnology, Misr University for Science and Technology (MUST), 6th October City, Egypt
| | - Saeedah Almutairi
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abdul Malik
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Bushra Hafeez Kiani
- Department of Biology and Biotechnology, Worcester Polytechnic Institute, Worcester, Massachuesetts, 01609, USA
| | - Ahmed R Henawy
- Department of Microbiology, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt
| | - Asmaa A Halema
- Department of Genetics, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt
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3
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Hu T, Li K, Ma C, Zhou N, Chen Q, Qi C. Improved classification of soil As contamination at continental scale: Resolving class imbalances using machine learning approach. CHEMOSPHERE 2024; 363:142697. [PMID: 38925515 DOI: 10.1016/j.chemosphere.2024.142697] [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: 10/21/2023] [Revised: 06/11/2024] [Accepted: 06/23/2024] [Indexed: 06/28/2024]
Abstract
The identification of arsenic (As)-contaminated areas is an important prerequisite for soil management and reclamation. Although previous studies have attempted to identify soil As contamination via machine learning (ML) methods combined with soil spectroscopy, they have ignored the rarity of As-contaminated soil samples, leading to an imbalanced learning problem. A novel ML framework was thus designed herein to solve the imbalance issue in identifying soil As contamination from soil visible and near-infrared spectra. Spectral preprocessing, imbalanced dataset resampling, and model comparisons were combined in the ML framework, and the optimal combination was selected based on the recall. In addition, Bayesian optimization was used to tune the model hyperparameters. The optimized model achieved recall, area under the curve, and balanced accuracy values of 0.83, 0.88, and 0.79, respectively, on the testing set. The recall was further improved to 0.87 with the threshold adjustment, indicating the model's excellent performance and generalization capability in classifying As-contaminated soil samples. The optimal model was applied to a global soil spectral dataset to predict areas at a high risk of soil As contamination on a global scale. The ML framework established in this study represents a milestone in the classification of soil As contamination and can serve as a valuable reference for contamination management in soil science.
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Affiliation(s)
- Tao Hu
- School of Resources and Safety Engineering, Central South University, Changsha, 410083, China
| | - Kechao Li
- School of Resources and Safety Engineering, Central South University, Changsha, 410083, China
| | - Chundi Ma
- School of Resources and Safety Engineering, Central South University, Changsha, 410083, China
| | - Nana Zhou
- School of Resources and Safety Engineering, Central South University, Changsha, 410083, China
| | - Qiusong Chen
- School of Resources and Safety Engineering, Central South University, Changsha, 410083, China
| | - Chongchong Qi
- School of Resources and Safety Engineering, Central South University, Changsha, 410083, China; School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Fankou Lead-Zinc Mine, NONFEMET, Shaoguan, 511100, China.
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4
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Souza-Santos LP, Silva CC, Barcellos RL, Souza Neto JA. Assessing sediment quality at tropical mangrove areas for using as reference sites in ecotoxicological bioassays. MARINE POLLUTION BULLETIN 2024; 205:116607. [PMID: 38896957 DOI: 10.1016/j.marpolbul.2024.116607] [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: 04/12/2024] [Revised: 06/11/2024] [Accepted: 06/14/2024] [Indexed: 06/21/2024]
Abstract
The sediment of five mangrove in Pernambuco/Brazil was investigated to find a reference site for toxicity bioassays. Sediment characteristics, metal levels, and toxic effects on the nauplius of the copepod Tisbe biminiensis were studied. The sediment was composed by terrigenous muds and siliciclastic sands with medium to high organic matter contents. The FeAs association show most of the high concentrations and positive correlation among its constituents in the south. In the north, the Ca-Sr-La association is higher and exhibits positive correlation among its components that usually found in carbonate rocks. Very intense toxic effects were observed, mainly in the south, with >70 % reductions in development. As and Hg were positively correlated with mortality and decrease in development. The sediment quality at studied mangroves prevent their use as a reference site in bioassays. These could be linked to the direct/perennial contribution of geogenic sources associated with anthropogenic environmental impacts.
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Affiliation(s)
- L P Souza-Santos
- Laboratório de Cultivo e Ecotoxicologia, Departamento de Oceanografia, Universidade Federal de Pernambuco, Av. Arquitetura s/n, Cidade Universitária, Recife, Pernambuco 50740-550, Brazil.
| | - C C Silva
- Programa de Pós-Graduação em Oceanografia, Departamento de Oceanografia, Universidade Federal de Pernambuco, Av. Arquitetura s/n, Cidade Universitária, Recife, Pernambuco 50740-550, Brazil
| | - R L Barcellos
- Laboratório de Oceanografia Geológica, Departamento de Oceanografia, Universidade Federal de Pernambuco, Av. Arquitetura s/n, Cidade Universitária, Recife, Pernambuco 50740-550, Brazil
| | - J A Souza Neto
- Programa de Pós-Graduação em Geociências, Departamento de Geologia, Universidade Federal de Pernambuco, Av. Arquitetura s/n, Cidade Universitária, Recife, Pernambuco 50740-550, Brazil
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5
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Teng ZJ, Li J, Wang P, Li CY, Peng M, Qin QL, Chen XL, Chen Y, Fu HH, Wang N, Zhang YZ. Meta-omics analysis reveals the marine arsenic cycle driven by bacteria. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135137. [PMID: 39024770 DOI: 10.1016/j.jhazmat.2024.135137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 06/16/2024] [Accepted: 07/05/2024] [Indexed: 07/20/2024]
Abstract
Arsenic is a toxic element widely distributed in the Earth's crust and ranked as a class I human carcinogen. Microbial metabolism makes significant contributions to arsenic detoxification, migration and transformation. Nowadays, research on arsenic is primarily in areas affected by arsenic pollution associated with human health activities. However, the biogeochemical traits of arsenic in the global marine ecosystem remain to be explicated. In this study, we revealed that seawater environments were primarily governed by the process of arsenate reduction to arsenite, while arsenite methylation was predominant in marine sediments which may serve as significant sources of arsenic emission into the atmosphere. Significant disparities existed in the distribution patterns of the arsenic cycle between surface and deep seawaters at middle and low latitudes, whereas these situations tend to be similar in the Arctic and Antarctic oceans. Significant variations were also observed in the taxonomic diversity and core microbial community of arsenic cycling across different marine environments. Specifically, γ-proteobacteria played a pivotal role in the arsenic cycle in the whole marine environment. Temperature, dissolved oxygen and phosphate were the crucial factors that related to these differentiations in seawater environments. Overall, our study contributes to a deeper understanding of the marine arsenic cycle.
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Affiliation(s)
- Zhao-Jie Teng
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China.
| | - Jian Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Peng Wang
- MOE Key Laboratory of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Joint Research Center for Marine Microbial Science and Technology, Shandong University and Ocean University of China, Qingdao 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, 266373, China
| | - Chun-Yang Li
- MOE Key Laboratory of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Joint Research Center for Marine Microbial Science and Technology, Shandong University and Ocean University of China, Qingdao 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, 266373, China
| | - Ming Peng
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Qi-Long Qin
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; Joint Research Center for Marine Microbial Science and Technology, Shandong University and Ocean University of China, Qingdao 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, 266373, China
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; Joint Research Center for Marine Microbial Science and Technology, Shandong University and Ocean University of China, Qingdao 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, 266373, China
| | - Yin Chen
- MOE Key Laboratory of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; School of Life Sciences, The University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Hui-Hui Fu
- MOE Key Laboratory of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Joint Research Center for Marine Microbial Science and Technology, Shandong University and Ocean University of China, Qingdao 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, 266373, China
| | - Ning Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China.
| | - Yu-Zhong Zhang
- MOE Key Laboratory of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System & College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Joint Research Center for Marine Microbial Science and Technology, Shandong University and Ocean University of China, Qingdao 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, 266373, China; Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China.
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6
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do Nascimento GB, Longhini CM, Cagnin RC, Costa ES, Silva CA, Neto RR, Sá F. Historical contamination with a current problem: Can mining tailings enhance coastal arsenic pollution? INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2024; 20:159-168. [PMID: 37430429 DOI: 10.1002/ieam.4807] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/12/2023]
Abstract
The coast of Espírito Santo state (Southeast Brazil) is recognized for its environmental arsenic (As) enrichment and, over the years, mining operations have potentialized it. We aimed to evaluate the effect of Rio Doce discharge on As inputs and the role of iron ore tailings from the Fundão dam disaster in enhancing As contamination in the marine sediment. Two scenarios were evaluated: Predisaster and Postdisaster; dry and wet conditions were considered in each period. High As concentrations were found in the Predisaster (28.44 ± 13.53 µg g-1 ), but a significant increase in As was remarkable during the Postdisaster in the wet season, one year after the disaster (maximum of 58.39 µg g-1 ; geoaccumulation index (Igeo ) Class 3, moderately severe pollution). On that occasion, iron (Fe) oxy-hydroxides from tailings were remobilized from the Rio Doce channel and deposited on the continental shelf bottom. Therefore, chemical interactions among Fe, As, and carbonates were enhanced, resulting in As and Fe coprecipitation and the trapping by carbonate adsorption. Rio Doce discharge seems to be the main factor in As inputs to the inner continental shelf when flooding do not occur previously in samplings, which allows further dispersion of contaminants, although this hypothesis should be tested further. Integr Environ Assess Manag 2024;20:159-168. © 2023 SETAC.
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Affiliation(s)
- Gisele B do Nascimento
- Laboratory of Environmental Geochemistry and Marine Pollution, Department of Oceanography, Center of Human and Natural Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Cybelle M Longhini
- Laboratory of Marine Biogeochemistry, Department of Oceanography and Limnology, Center of Biosciences, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Renata C Cagnin
- Laboratory of Environmental Geochemistry and Marine Pollution, Department of Oceanography, Center of Human and Natural Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Eduardo S Costa
- Laboratory of Environmental Geochemistry and Marine Pollution, Department of Oceanography, Center of Human and Natural Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Cesar A Silva
- Laboratory of Environmental Geochemistry and Marine Pollution, Department of Oceanography, Center of Human and Natural Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Renato R Neto
- Laboratory of Environmental Geochemistry and Marine Pollution, Department of Oceanography, Center of Human and Natural Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Fabian Sá
- Laboratory of Environmental Geochemistry and Marine Pollution, Department of Oceanography, Center of Human and Natural Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
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Ellwanger JH, Chies JAB. Brazil's heavy metal pollution harms humans and ecosystems. SCIENCE IN ONE HEALTH 2023; 2:100019. [PMID: 39077034 PMCID: PMC11262263 DOI: 10.1016/j.soh.2023.100019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 06/26/2023] [Indexed: 07/31/2024]
Abstract
This letter draws attention to the worrying situation of heavy metal pollution in Brazil, especially concerning the Amazon's Indigenous peoples affected by mercury contamination from illegal gold mining activities. Heavy metal pollution is also an emerging problem in other Brazilian biomes besides the Amazon Forest (e.g., Pampa biome in southern Brazil), as well as in coastal ecosystems/regions and large cities. Despite being a neglected problem, Brazil's heavy metal pollution causes significant detrimental impacts on human health and ecosystems. Finally, some alternatives to overcome this problem are suggested.
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Affiliation(s)
- Joel Henrique Ellwanger
- Laboratory of Immunobiology and Immunogenetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Department of Genetics, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, 91501-970, Brazil
| | - José Artur Bogo Chies
- Laboratory of Immunobiology and Immunogenetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Department of Genetics, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, 91501-970, Brazil
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8
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Zheng C, Yang ZB, Xu XX, Cheng Z. Assessing the risk of human exposure to bioaccessible arsenic from total diet through market food consumption in Chengdu, China. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:2065-2076. [PMID: 35789313 DOI: 10.1007/s10653-022-01325-6] [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: 08/25/2021] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
To assess the daily intake of total arsenic (tAs) and arsenic speciation and their potential health risks, different food groups, including vegetables, rice, meat, viscera, freshwater fish, and seafood from Chengdu, China were analyzed. The concentrations of tAs ranged from 41.3 to 1185 μg kg-1 with a median of 238 μg kg-1, and 26.0% of tAs in the food groups was of inorganic toxic form. The median concentration of As(V) in rice (184 ± 21.6 μg kg-1) was approximately 2 to 6 times higher than those in other food groups. The bioaccessible inorganic arsenic (iAs) concentrations of the food items obtained from the local markets of Chengdu ranged from 1.07 to 24.6 μg kg-1 (mean of 6.04 μg kg-1). Rice contributed toward the largest amount of daily iAs intake (66.2%). The mean daily iAs intake from vegetable, meat and viscera contributed 10.7%, 12.5% and 6.04% of total iAs intake, respectively. The actual concentration of arsenic in the food exposed to the human body depends on oral bioaccessible fraction. The oral bioaccessibility estimated daily intake (μg kg-1 bw d-1) of tAs and iAs for the residents of Chengdu was 0.32 and 0.16. Health risk assessments carried out based on bioaccessible iAs concentrations showed that the food items were safe for consumption from the iAs perspective.
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Affiliation(s)
- Chao Zheng
- College of Environment Science, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhan-Biao Yang
- College of Environment Science, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiao-Xun Xu
- College of Environment Science, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhang Cheng
- College of Environment Science, Sichuan Agricultural University, Chengdu, 611130, China.
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Ma T, Baeyens W, Leermakers M, Smolíková V, Luo M, Li G, Vandeputte D, Perrot V, Gao Y. Investigation on metal geochemical cycling in an anthropogenically impacted tidal river in Belgium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 882:163604. [PMID: 37087008 DOI: 10.1016/j.scitotenv.2023.163604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/06/2023] [Accepted: 04/16/2023] [Indexed: 05/03/2023]
Abstract
The geochemical behavior of metals in water and sediment was investigated in the tidal section of the Zenne River in Belgium. Twelve-hour sampling campaigns were performed in October 2013 and March 2021 at the mouth of the Zenne River, under dry and rainy weather conditions respectively. Water samples were collected every hour while the passive samplers of Diffusive Gradients in Thin-films (DGT) were deployed continuously during a tidal cycle. In addition, bottom sediments were sampled at the tidal station and water samples were taken upstream and downstream of that station to identify the metal sources. The highest concentrations of Fe, Mn, Pb, Cr, Ni and Zn appear at low tide, indicating the Zenner River as a main source. However, for Co, Cd and Cu, other sources including upstream transport may explain their behavior during a tidal cycle. Fe, Pb and Cr are essentially transported in the particulate phase (<10 % dissolved) while the other metals in the dissolved phase (20 to 90 %). Rainfall and wind gust events also play an important role in trace metal distribution, increasing sediment resuspension and metal desorption. A good agreement was found between the time-averaged dissolved and DGT-labile metal concentrations with the exception of Cu and Fe, which form strong organic Cu complexes and Fe colloids respectively. The sediments of the tidal Zenne are contaminated by trace metals, thus acting as a secondary pollution source to the river. The reductive dissolution of Mn and Fe oxyhydroxides and the release of associated trace metals are the main mobilization mechanisms. Knowledge of the upstream and downstream levels in the water column, the benthic fluxes, which are based on turbulent diffusion, and the partitioning between dissolved and particulate phases allow to explain the metal concentration variations during the tidal cycle.
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Affiliation(s)
- Tianhui Ma
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Willy Baeyens
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Martine Leermakers
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Vendula Smolíková
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Mingyue Luo
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Guanlei Li
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Delphine Vandeputte
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Vincent Perrot
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Yue Gao
- Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
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Yu X, LeMonte JJ, Li J, Stuckey JW, Sparks DL, Cargill JG, Russoniello CJ, Michael HA. Hydrologic Control on Arsenic Cycling at the Groundwater-Surface Water Interface of a Tidal Channel. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:222-230. [PMID: 36534790 DOI: 10.1021/acs.est.2c05930] [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] [Indexed: 06/17/2023]
Abstract
Historical industrial activities have resulted in soil contamination at sites globally. Many of these sites are located along coastlines, making them vulnerable to hydrologic and biogeochemical alterations due to climate change and sea-level rise. However, the impact of hydrologic dynamics on contaminant mobility in tidal environments has not been well studied. Here, we collected data from pressure transducers in wells, multi-level redox sensors, and porewater samplers at an As-contaminated site adjacent to a freshwater tidal channel. Results indicate that sharp redox gradients exist and that redox conditions vary on tidal to seasonal timescales due to sub-daily water level fluctuations in the channel and seasonal groundwater-surface water interactions. The As and Fe2+ concentrations decreased during seasonal periods of net discharge to the channel. The seasonal changes were greater than tidal variations in both Eh and As concentrations, indicating that impacts of the seasonal mechanism are stronger than those of sub-daily water table fluctuations. A conceptual model describing tidal and seasonal hydro-biogeochemical coupling is presented. These findings have broad implications for understanding the impacts of sea-level rise on the mobility of natural and anthropogenic coastal solutes.
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Affiliation(s)
- Xuan Yu
- Center for Water Resources and Environment, School of Civil Engineering, Sun Yat-sen University, Guangzhou510275, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai519082, China
| | - Joshua J LeMonte
- Department of Geological Sciences, Brigham Young University, Provo, Utah84602, United States
| | - Junxia Li
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology & Key Laboratory of Source Apportionment and Control of Aquatic Pollution, Ministry of Ecology and Environment, China University of Geosciences, Wuhan430074, China
| | - Jason W Stuckey
- Department of Natural Sciences and Environmental Science Program, Multnomah University, Portland, Oregon97220, United States
| | - Donald L Sparks
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware19716, United States
| | - John G Cargill
- Department of Natural Resources and Environmental Control, New Castle, Delaware19720, United States
| | | | - Holly A Michael
- Department of Earth Sciences and Department of Civil & Environmental Engineering, University of Delaware, Newark, Delaware19716, United States
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Ferraro A, Parisi A, Barbone E, Race M, Mali M, Spasiano D, Fratino U. Characterising contaminants distribution in marine-coastal sediments through multivariate and nonparametric statistical analyses: a complementary strategy supporting environmental monitoring and control. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:59. [PMID: 36326927 PMCID: PMC9633496 DOI: 10.1007/s10661-022-10617-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
This work investigates a statistical approach analysing data from monitoring activities on marine-coastal areas for environmental quality determination and surveillance. Analyses were performed on a database of the Environmental Protection and Prevention Agency of the Puglia Region. As, Cr, Ni, and Pb concentration values in marine sediments and biota from 2013 to 2015 and 2017 were processed to investigate different contaminant characteristics. Hierarchical cluster analysis identified three contaminant distribution classes with (1) highest Cr, Ni, and Pb concentrations, (2) highest As concentration, and (3) lowest contaminants concentration. The Kruskal-Wallis and Friedman tests showed that contaminant distributions were statistically different when considering the monitoring years and classes. However, statistical similarities resulted during the 2013-2017 and 2014-2015 periods. Spearman's coefficients displayed positive correlations among the pollutants in each matrix and mainly negative correlations for matrices comparison. This methodology aims to provide a practical support for monitoring to identify potential environmental deterioration over time and correlations with specific contamination sources.
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Affiliation(s)
- Alberto Ferraro
- Department of Civil, Environmental, Land, Building Engineering and Chemistry, Polytechnic University of Bari, Via E. Orabona 4, Bari, 70125, Italy.
| | - Alessandro Parisi
- Department of Civil, Environmental, Land, Building Engineering and Chemistry, Polytechnic University of Bari, Via E. Orabona 4, Bari, 70125, Italy
| | - Enrico Barbone
- Environmental Protection and Prevention Agency of Puglia Region (ARPA Puglia), Corso Trieste 27, Bari, 70126, Italy
| | - Marco Race
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via di Biasio 43, Cassino, 03043, Italy
| | - Matilda Mali
- Department of Civil, Environmental, Land, Building Engineering and Chemistry, Polytechnic University of Bari, Via E. Orabona 4, Bari, 70125, Italy
| | - Danilo Spasiano
- Department of Civil, Environmental, Land, Building Engineering and Chemistry, Polytechnic University of Bari, Via E. Orabona 4, Bari, 70125, Italy
| | - Umberto Fratino
- Department of Civil, Environmental, Land, Building Engineering and Chemistry, Polytechnic University of Bari, Via E. Orabona 4, Bari, 70125, Italy
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12
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Yang H, Zhou X, Wang JS, Liu DW. Simultaneous stabilization/solidification of arsenic in acidic wastewater and tin mine tailings with synthetic multiple solid waste base geopolymer. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 320:115783. [PMID: 35940009 DOI: 10.1016/j.jenvman.2022.115783] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 07/07/2022] [Accepted: 07/16/2022] [Indexed: 06/15/2023]
Abstract
Stabilization/Solidification (S/S) is considered as a feasible technology for the treatment of arsenic (As) in acidic wastewater (AW) and tin mine tailings (TMTs); however, high cost, high carbon footprint, and strict reaction conditions are the main limitations. Herein, a novel alkali-activated geopolymer material (AAGM) for S/S As was synthesized by combining AW, TMT, gypsum (GP), and metakaolin (MK). At room temperature, an initial As concentration of 3914 mg/L, a NaOH content of 4.98%, and an MK content of 20% decreased the As leaching concentration to 1.55 mg/L (<5 mg/L). The main S/S mechanisms of As included physical encapsulation of C-(A)-S-H and geopolymer structures, ion exchange of ettringite, and formation of Fe-As and Ca-As precipitates. Further studies showed that increasing initial As concentration and MK content facilitated the formation of Ca-As precipitates and C-(A)-S-H gels. The semi-dynamic leaching tests revealed that the leaching mechanism of As was surface wash-off. The effective diffusion coefficients of the samples were less than 10-13 cm2/s, and the respective leachability indexes were greater than 9, indicating that AAGM was effective in preventing the leaching of As. Therefore, this study provides a green and low cost solution for the synergistic utilization of AW, TMT, GP, and MK.
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Affiliation(s)
- Hui Yang
- Kunming University of Science and Technology, Kunming, 650093, China
| | - Xian Zhou
- Kunming University of Science and Technology, Kunming, 650093, China; Kunming Metallurgical Research Institute Co. LTD, Kunming, 650031, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, 650093, China
| | - Jin-Song Wang
- Kunming University of Science and Technology, Kunming, 650093, China
| | - Dian-Wen Liu
- Kunming University of Science and Technology, Kunming, 650093, China
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13
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Shi Y, Xing Y, Song Z, Dang X, Zhao H. Adsorption performance and its mechanism of aqueous As(III) on polyporous calcined oyster shell-supported Fe-Mn binary oxide. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2022; 94:e10714. [PMID: 35445485 DOI: 10.1002/wer.10714] [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: 01/24/2022] [Revised: 03/20/2022] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
Fe-Mn binary oxide (FMBO) is a promising adsorbent for As(III) removal through combined adsorption and oxidation. The calcined oyster shell-supported Fe-Mn binary oxide (FMBO/OS) adsorbent was synthesized by the co-precipitation method. Results indicated that the calcined oyster shell, as a carrier, improved the stability of FMBO and its adsorption capacity for As(III). The maximum adsorption capacity of FMBO/OS on As(III) reached 140.5 mg·g-1 . Under pH 5.0 and 25°C, the removal efficiency of FMBO/OS to As(III) solution (C0 = 10 mg·L-1 ) reached 87% within 12 h. Moreover, based on the characterization analyses, the removal mechanisms of As(III) were deduced to include the combined adsorption and oxidation process of FMBO and the synergistic effect of oyster shells. This work provides new insights into synthesizing efficient and green adsorbents to remove aqueous As(III). Meanwhile, it provides technical support for reusing waste biomass materials such as the oyster shell. PRACTITIONER POINTS: FMBO/OS was prepared by a simple hydrothermal co-precipitation method. The carrier alleviates the agglomeration of Fe-Mn oxides. The adsorbent shows a strong adsorption capacity of As(III) and good selectivity. The good results benefit from the synergistic effect of calcium arsenate generation. The prepared adsorbent can adsorb arsenic in real samples.
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Affiliation(s)
- Yao Shi
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Yifei Xing
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Zhilian Song
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Xueming Dang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Huimin Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
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14
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Mohammadi M, Naghibi SA, Motevalli A, Hashemi H. Human-induced arsenic pollution modeling in surface waters - An integrated approach using machine learning algorithms and environmental factors. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 305:114347. [PMID: 34954681 DOI: 10.1016/j.jenvman.2021.114347] [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: 06/27/2021] [Revised: 11/20/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
In recent years, assessment of sediment contamination by heavy metals, i.e., arsenic, has attracted the interest of scientists worldwide. The present study provides a new methodology to better understand the factors influencing surface water vulnerability to arsenic pollution by two advanced machine learning algorithms including boosted regression trees (BRT) and random forest (RF). Based on the sediment quality guidelines (Effects range low) polluted and non-polluted arsenic sediment samples were defined with concentrations >8 ppm and <8 ppm, respectively. Different conditioning factors such as topographical, lithology, erosion, hydrological, and anthropogenic factors were acquired to model surface waters' vulnerability to arsenic. We trained and validated the models using 70 and 30% of both polluted and non-polluted samples, respectively, and generated surface vulnerability maps. To verify the maps to arsenic pollution, the receiver operating characteristics (ROC) curve was implemented. The results approved the acceptable performance of the RF and BRT algorithms with an area under ROC values of 85% and 75.6%, respectively. Further, the findings showed higher importance of precipitation, slope aspect, distance from residential areas, and slope length in arsenic pollution in the modeling process. Erosion, lithology, and land use maps were introduced as the least important factors. The introduced methodology can be used to define the most vulnerable areas to arsenic pollution in advance and implement proper remediation actions to reduce the damages.
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Affiliation(s)
- Maziar Mohammadi
- Department of Watershed Management and Engineering, Faculty of Natural Resources, Tarbiat Modares University, Iran.
| | - Seyed Amir Naghibi
- Department of Water Resources Engineering & Center for Advanced Middle Eastern Studies, Lund University, Lund, Sweden
| | - Alireza Motevalli
- Department of Watershed Management and Engineering, Faculty of Natural Resources, Tarbiat Modares University, Iran
| | - Hossein Hashemi
- Department of Water Resources Engineering & Center for Advanced Middle Eastern Studies, Lund University, Lund, Sweden
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15
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Galchenko AV, Sidorova EI, Sherstneva AA, Skalny AA, Lobanova JN. Comparison of concentrations of toxic elements in the hair of first-year students of RUDN University from different regions of the world: a cross-sectional study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:8341-8352. [PMID: 34487321 DOI: 10.1007/s11356-021-16253-8] [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: 04/27/2021] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
Due to the development of the metallurgical and energy industries and the operation of incinerators, more and more environmental pollution is occurring. Toxic elements accumulate in the biosphere and affect the state of the population of the regions of large-scale production or the disposal of industrial waste. The main goal of this study was to compare the toxic elements hair composition in people from different regions of the world. The concentrations of toxic and potentially toxic elements (Al, As, Be, Cd, Hg, Pb, Sn) in 198 people, first-year students of People's Friendship University of Russia, who arrived from different regions of the world, were measured with inductively coupled plasma mass spectrometry. Students were divided into 6 groups: from South and East Asia, from Latin America, from Arab countries, Central Asia and Afghanistan, from South and Central Africa, from Iran and Azerbaijan, and from Russia, Ukraine, and Moldova. Medians of the concentrations of elements in the hair in the general group were 5.8 μg/g for Al, 30 ng/g for As, 0.6 ng/g for Be, 9.0 ng/g for Cd, 0.11 μg/g for Hg, 0.24 μg/g for Pb, and 0.11 μg/g for Sn. All these values fall within the normal range. Students from Russia, Moldova, and Ukraine showed a significantly higher Sn content (0.28 μg/g) in their hair than subjects from other regions except for Latin America, p<0,05. Except for As, cases of exceeding their recommended concentrations in the hair were identified. However, the proportion of subjects with deviations in each group was not high - not more than 7%. In all regions, a positive correlation was found between Cd, Pb, and Sn, p<0.05, r>0.5 for all. Cases of exceeding the maximum permissible concentrations of various toxic elements in the hair were detected in people from all regions of the Earth included in the study. And although the overall picture of the content of toxic elements in the hair of students from all regions in our study does not look critical, the results of previous studies, as well as information about the total deterioration of the environmental situation throughout the Earth, necessitate further large-scale environmental studies.
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Affiliation(s)
- Alexey Vladimirovich Galchenko
- Department of Medical Elementology, Peoples' Friendship University of Russia, Miklukho-Maklay St., 6, Moscow, Russian Federation, 117198.
| | - Elizaveta Ilinichna Sidorova
- Nelyubin Institute of Pharmacy of Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, Sechenov University, Moscow, Russian Federation
| | - Anastasia Alekseevna Sherstneva
- Nelyubin Institute of Pharmacy of Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, Sechenov University, Moscow, Russian Federation
| | - Andrew Anatolevich Skalny
- Department of Medical Elementology, Peoples' Friendship University of Russia, Miklukho-Maklay St., 6, Moscow, Russian Federation, 117198
| | - Julia Nikolaevna Lobanova
- Department of Medical Elementology, Peoples' Friendship University of Russia, Miklukho-Maklay St., 6, Moscow, Russian Federation, 117198
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16
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Alam MR, Rahman MM, Tam NFY, Yu RMK, MacFarlane GR. The accumulation and distribution of arsenic species and selected metals in the saltmarsh halophyte, spiny rush (Juncus acutus). MARINE POLLUTION BULLETIN 2022; 175:113373. [PMID: 35093784 DOI: 10.1016/j.marpolbul.2022.113373] [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: 11/16/2021] [Revised: 01/16/2022] [Accepted: 01/17/2022] [Indexed: 06/14/2023]
Abstract
This study examined the accumulation of As species, Se, Cu, Zn, Cd and Pb in the halophyte Juncus acutus, collected from three anthropogenically impacted estuaries in NSW, Australia. As concentration ranged from 4 to 22 μg/g at Georges River, 2-16 μg/g at Lake Macquarie and 6 μg/g at Hunter Estuary. Inorganic As was accumulated mainly in roots with low translocation to culm with a greater abundance of AsV. However, AsIII (TF = 0.32) showed greater mobility from the roots to shoots than AsV (TF = 0.04), indicating a higher quantity of AsIII specific transporter assemblages in the plasmalemma of the endodermis or cytoplasmic reduction of AsV to AsIII in culms. Metal(loid)s, including As (90%), were predominantly in root tissues and very limited translocation to culm, indicating the species is a useful phytostabiliser. As and all other metal(loid)s in roots were correlated with sediment loads (p < 0.05, R2 = 0.10-0.52), indicating the species would be an accumulative bioindicator.
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Affiliation(s)
- Md Rushna Alam
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia; Department of Aquaculture, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh
| | - Mohammad Mahmudur Rahman
- Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Nora Fung-Yee Tam
- Department of Science, School of Science and Technology, The Open University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Richard Man Kit Yu
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Geoff R MacFarlane
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia.
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17
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Souza JR, Sielski LH, Krause M, Souza BS, Brandão GP, Albino J, Carneiro MTWD. The influence of beach geology and morphodynamics on chemical pollution assessments following a mining accident. MARINE POLLUTION BULLETIN 2022; 174:113230. [PMID: 34875480 DOI: 10.1016/j.marpolbul.2021.113230] [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: 05/26/2021] [Revised: 10/22/2021] [Accepted: 11/30/2021] [Indexed: 06/13/2023]
Abstract
In the present study the distribution of chemical elements in beaches adjacent to the Doce River mouth hit by the tailings mud from a mining accident were assessed. Sedimentological and morphological coastal aspects were also considered. The results indicate that wave-exposed delta plain beaches exhibit high resiliency, despite their proximity to potential pollution sources. On the other hand, shore platform beaches tend to accumulate chemical elements, mainly due to limited cross-shore sediment exchanges. Arsenic concentrations in the evaluated shore platform beaches were significantly higher than the delta plain beach. Shore platform beaches are more susceptible to frequent flooding and to higher elemental concentrations at the berm and beach face. Thus, the morphological characteristics of the assessed shore platform beaches, and input from the mud plume must be considered in a joint assessment strategy in order to obtain a broad understanding of the actual scenario regarding beach contamination.
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Affiliation(s)
- Jefferson R Souza
- Laboratory of Chemical Sciences, North Fluminense State University Darcy Ribeiro, Brazil
| | - Luiz Henrique Sielski
- Laboratory of Coastal Geomorphology and Sedimentology, Department of Oceanography, Federal University of Espírito Santo, Brazil
| | - Maiara Krause
- Laboratory of Spectrometric Analysis, Department of Chemistry, Federal University of Espírito Santo, Brazil
| | - Brenda Silva Souza
- Laboratory of Coastal Geomorphology and Sedimentology, Department of Oceanography, Federal University of Espírito Santo, Brazil
| | - Geisamanda Pedrini Brandão
- Laboratory of Spectrometric Analysis, Department of Chemistry, Federal University of Espírito Santo, Brazil
| | - Jacqueline Albino
- Laboratory of Coastal Geomorphology and Sedimentology, Department of Oceanography, Federal University of Espírito Santo, Brazil
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18
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Angeli JLF, Sartoretto JR, Kim BSM, de Lima Ferreira PA, de Mahiques MM, Figueira RCL. Trace element fluxes during the "Anthropocene" in a large South American industrial and port area (Santos and São Vicente estuarine system, SE, Brazil). ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:594. [PMID: 34426853 DOI: 10.1007/s10661-021-09378-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Abstract
The worldwide evidence of human activities on the environment led the scientific community to recognize a new geologic time unit known as the "Anthropocene." Since the twentieth century, urbanization and industrialization needs driven by population and economic growth have impacted several ecosystems including the estuaries. To assess the contamination, provenance, and fluxes of trace elements (As, Cr, Cu, Ni, Pb, Sc, V, and Zn) over the last century, a geochemical and chemometric technique was employed in sediment cores of an industrial and port region of international importance, the Santos and São Vicente Estuarine System (SSVES). The results indicated low contamination, with the highest enrichment factors (EFs) for Cu (EF = 3.1), Pb (EF = 2.7), Zn (EF = 2.4), and As (EF = 2.3) found next to the harbor area. The Pre-industrial records confirm the relatively high concentrations of As and its naturally enriched occurrence on the Brazilian shelf. Sediment accumulation rates and trace element fluxes showed a general increase over the years, since the early 1960s, associated with the "Great Acceleration" of the mid-twentieth century. These alterations are human-induced and include urbanization and industrialization. Nonetheless, as the contents and enrichment of trace elements indicate that the region is not severely polluted, we hypothesize that the contamination in the SSVES is likely related to the drainage and erosion of the urbanized adjacent area, rather than direct disposal of inorganic contaminants from the industrial activity.
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Gao M, Sun Q, Wang J, Ding S. Investigation of the combined use of capping and oxidizing agents in the immobilization of arsenic in sediments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 782:146930. [PMID: 33848870 DOI: 10.1016/j.scitotenv.2021.146930] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
The combined use of capping (lanthanum modified bentonite; LMB) and oxidizing (calcium nitrate; CN) agents was investigated to immobilize arsenic (As) in sediments. The vertical changes in labile As and dissolved As were measured using diffusive gradients in thin films (DGT) and Rhizon devices. The results showed that the combined application of LMB and CN had the optimal effect on the immobilization of both DGT-labile As and dissolved As, compared to single treatments using LMB or CN. After 60 days of incubation, the maximum reduction efficiencies of DGT-labile As at sediment depths were 76.4%, 70.8%, and 44.9% of those treated with LMB + CN, CN, and LMB, respectively. After 32 days of incubation, the average concentrations of dissolved total As throughout the depths decreased from 7.71 μg/L after the control treatment without any amendments to 5.25, 4.03, and 3.15 μg/L after the addition of LMB, CN, and LMB + CN, respectively. The larger part of exchangeable As at sediment depths was converted into the reducible As mainly bound Fe/Mn oxide-hydroxides after combining LMB and CN. Due to the As(III) existing mainly in the form of electrically neutral H3AsO3 in sediments, it is hard to adsorb As(III) for the LMB and iron/manganese oxide-hydroxides formed by the oxidation effect of calcium nitrate. Thus, the single or combined LMB and CN use had much weaker effect on the immobilization of As(III) compared with As(V). The results of current study indicated that the combined use of LMB and CN could be a promising method to control the potential release of As from the sediment to the overlying water. However, this method needs further improvement to achieve a better immobilization effect on As(III) in sediments.
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Affiliation(s)
- Mingrui Gao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Qin Sun
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Jinhui Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Shiming Ding
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
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20
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Bissassa M, Rais N, Ijjaali M. Efficiency of Fez WWTP: multi-parameter evaluation of water and sediment quality. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:551. [PMID: 34355297 DOI: 10.1007/s10661-021-09309-2] [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: 12/14/2020] [Accepted: 07/12/2021] [Indexed: 06/13/2023]
Abstract
In order to assess the impact of the proper functioning of wastewater treatment plants (WWTPs) and sanitation networks on the quality of water and surface sediments of the Oued Fez River and its tributaries, and ultimately their outlet in the Sebou River, physico-chemical, geochemical and mineralogical analyses were performed. The components were studied in high- and low-water regimes at eight sites. Seven heavy metals (As, Cd, Cr, Cu, Ni, Pb and Zn) were investigated in the sediments, with a decreasing trend being identified as Zn > Cu > Pb > Cr > As > Ni > Cd, and a mobility sequence as Cu > Pb > Zn > Ni > Cr. A comparison of the total heavy metal concentrations in the Oued Fez and Sebou River sediments with those of previous studies indicated a reduction in the harmful and polluting contribution of the Oued Fez to the Sebou River. The heavy metal assessment was achieved using environmental indices and sediment quality guidelines. The obtained results indicate that the presence of heavy metals in the sediment mainly comes from anthropogenic activities. Based on these results and their comparison with those from previous studies, the contribution of WWTPs and sanitation networks to improving the water quality of the middle Sebou River is clearly noteworthy.
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Affiliation(s)
- Mouna Bissassa
- Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Route Immouzer, 2202, Fez, Morocco.
| | - Naoual Rais
- Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Route Immouzer, 2202, Fez, Morocco
| | - Mustapha Ijjaali
- Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Route Immouzer, 2202, Fez, Morocco
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21
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Abreu FEL, Martins SE, Fillmann G. Ecological risk assessment of booster biocides in sediments of the Brazilian coastal areas. CHEMOSPHERE 2021; 276:130155. [PMID: 33743422 DOI: 10.1016/j.chemosphere.2021.130155] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 02/16/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Although booster biocides (Irgarol, diuron, chlorothalonil, dichlofluanid, and DCOIT) have been detected in sediments along the Brazilian coastal areas, the risk associated to their occurrence and levels is still unknown. Thus, the ecological risk of booster biocides to sediment-dwelling organisms from the Brazilian coast was assessed using a risk characterization approach through the Risk Quotient (Measured environmental concentration (MEC)/Predicted no effect concentrations (PNECs)). Sedimentary PNECs for Irgarol, diuron, chlorothalonil and DCOIT were derived based on published ecotoxicological data from both freshwater and marine studies, while a NORMAN methodology was used to derived it for dichlofluanid. Results showed that DCOIT, diuron, Irgarol, chlorothalonil, and dichlofluanid can pose high risk on 47%, 35%, 15%, 1% and 1%, respectively, of the 113 Brazilian sites appraised. Considering the trend of expansion of navigation/maritime activities, DCOIT may worsen its impact over the coastal areas of Brazil, especially ports, but also ship/boatyards, marinas, and maritime traffic zones. The present study is an important contribution to support advance on policy formulation concerning booster biocides worldwide, particularly considering the lack of regulation on the use of antifouling biocides in Brazil.
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Affiliation(s)
- Fiamma Eugênia Lemos Abreu
- Instituto de Oceanografia, Universidade Federal Do Rio Grande (IO -FURG), Av. Itália S/n, Campus Carreiros, 96203-900, Rio Grande, RS, Brazil; PPG Em Oceanologia, Universidade Federal Do Rio Grande (PPGO-FURG), Av. Itália S/n, Campus Carreiros, 96203-900, Rio Grande, RS, Brazil
| | | | - Gilberto Fillmann
- Instituto de Oceanografia, Universidade Federal Do Rio Grande (IO -FURG), Av. Itália S/n, Campus Carreiros, 96203-900, Rio Grande, RS, Brazil; PPG Em Oceanologia, Universidade Federal Do Rio Grande (PPGO-FURG), Av. Itália S/n, Campus Carreiros, 96203-900, Rio Grande, RS, Brazil.
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22
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Bundschuh J, Schneider J, Alam MA, Niazi NK, Herath I, Parvez F, Tomaszewska B, Guilherme LRG, Maity JP, López DL, Cirelli AF, Pérez-Carrera A, Morales-Simfors N, Alarcón-Herrera MT, Baisch P, Mohan D, Mukherjee A. Seven potential sources of arsenic pollution in Latin America and their environmental and health impacts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 780:146274. [PMID: 34030289 DOI: 10.1016/j.scitotenv.2021.146274] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/25/2021] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
This review presents a holistic overview of the occurrence, mobilization, and pathways of arsenic (As) from predominantly geogenic sources into different near-surface environmental compartments, together with the respective reported or potential impacts on human health in Latin America. The main sources and pathways of As pollution in this region include: (i) volcanism and geothermalism: (a) volcanic rocks, fluids (e.g., gases) and ash, including large-scale transport of the latter through different mechanisms, (b) geothermal fluids and their exploitation; (ii) natural lixiviation and accelerated mobilization from (mostly sulfidic) metal ore deposits by mining and related activities; (iii) coal deposits and their exploitation; (iv) hydrocarbon reservoirs and co-produced water during exploitation; (v) solute and sediment transport through rivers to the sea; (vi) atmospheric As (dust and aerosol); and (vii) As exposure through geophagy and involuntary ingestion. The two most important and well-recognized sources and mechanisms for As release into the Latin American population's environments are: (i) volcanism and geothermalism, and (ii) strongly accelerated As release from geogenic sources by mining and related activities. Several new analyses from As-endemic areas of Latin America emphasize that As-related mortality and morbidity continue to rise even after decadal efforts towards lowering As exposure. Several public health regulatory institutions have classified As and its compounds as carcinogenic chemicals, as As uptake can affect several organ systems, viz. dermal, gastrointestinal, peptic, neurological, respiratory, reproductive, following exposure. Accordingly, ingesting large amounts of As can damage the stomach, kidneys, liver, heart, and nervous system; and, in severe cases, may cause death. Moreover, breathing air with high As levels can cause lung damage, shortness of breath, chest pain, and cough. Further, As compounds, being corrosive, can also cause skin lesions or damage eyes, and long-term exposure to As can lead to cancer development in several organs.
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Affiliation(s)
- Jochen Bundschuh
- UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba 4350, Queensland, Australia.
| | - Jerusa Schneider
- Department of Geology and Natural Resources, Institute of Geosciences, University of Campinas, 13083-855 Campinas, SP, Brazil; Faculty of Agricultural Sciences, Federal University of Grande Dourados, João Rosa Góes St., 1761, Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Mohammad Ayaz Alam
- Departamento de Geología, Facultad de Ingeniería, Universidad de Atacama, Avenida Copayapu 485, Copiapó, Región de Atacama, Chile
| | - Nabeel Khan Niazi
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan
| | - Indika Herath
- UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba 4350, Queensland, Australia
| | - Faruque Parvez
- Department of Environmental Health Sciences, Columbia University, 60 Haven Ave, B-1, New York, NY 10032, USA
| | - Barbara Tomaszewska
- AGH University of Science and Technology, Mickiewicza 30 Av., 30-059 Kraków, Poland
| | | | - Jyoti Prakash Maity
- Department of Earth and Environmental Sciences, National Chung Cheng University, 168 University Road, Min-Hsiung, Chiayi County 62102, Taiwan
| | - Dina L López
- Department of Geological Sciences, Ohio University, 316 Clippinger Laboratories, Athens, OH, USA
| | - Alicia Fernández Cirelli
- University of Buenos Aires, Faculty of Veterinary Sciences, Instituto de Investigaciones en Producción Animal (UBA-CONICET), Centro de Estudios, Transdiciplinarios del Agua (UBA), Av. Chorroarín 280, CABA C1427CWO, Argentina
| | - Alejo Pérez-Carrera
- University of Buenos Aires, Faculty of Veterinary Sciences, Centro de Estudios Transdiciplinarios del Agua (UBA), Instituto de Investigaciones en Producción Animal (UBA-CONICET), Cátedra de Química Orgánica de Biomoléculas, Av. Chorroarín 280, CABA C1427CWO, Argentina
| | - Nury Morales-Simfors
- UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba 4350, Queensland, Australia; RISE Research Institutes of Sweden, Division ICT-RISE SICS East, Linköping SE-581.83, Sweden
| | - Maria Teresa Alarcón-Herrera
- Departamento de Ingeniería Sustentable, Centro de Investigación en Materiales Avanzados SC Unidad Durango, C. CIMAV # 110, Ejido Arroyo Seco, Durango, Dgo., Mexico
| | - Paulo Baisch
- Laboratório de Oceanografia Geológica, Instituto de Oceanografia, Universidade Federal do Rio Grande (FURG), Campus Carreiros, CP 474, CEP 96203-900 Rio Grande, RS, Brazil
| | - Dinesh Mohan
- UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba 4350, Queensland, Australia; School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Abhijit Mukherjee
- Department of Geology and Geophysics, Indian Institute of Technology (IIT), Kharagpur, West Bengal 721302, India
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Sundar S, Roy PD, Chokkalingam L, Ramasamy N. Evaluation of metals and trace elements in sediments of Kanyakumari beach (southernmost India) and their possible impact on coastal aquifers. MARINE POLLUTION BULLETIN 2021; 169:112527. [PMID: 34051519 DOI: 10.1016/j.marpolbul.2021.112527] [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: 01/12/2021] [Revised: 03/14/2021] [Accepted: 05/17/2021] [Indexed: 05/12/2023]
Abstract
Beach sediments of Kanyakumari at the southernmost India were evaluated for metals and trace elements and to assess their possible impact on coastal ecosystems. Positive correlations (except for Cd and Sr) between them indicated metamorphic lithologies and heavy mineral deposits as possible sources. Significant-extremely high enrichment and very high contamination of Th, Zr, Mo, Ti and U reflected the presence of different heavy minerals. The geo-accumulation index, however, mirrored their variable abundances at different sites. Association of Cd with P suggested the influence of anthropogenic solid waste from fishing industry. It might have caused >41-fold enrichment of Cd and the Fe- Mn-oxides possibly acted as scavengers for 13-fold enrichment of As compared to UCC. Concentrations of Zn and Cr between ERL and ERM in 13% and 93% of the samples, and Ni > ERM in 87% of sediments suggest their bioavailability to seawater with a potential risk for coastal aquifers.
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Affiliation(s)
- Sajimol Sundar
- Department of Remote Sensing, Bharathidasan University, Tiruchirappalli 620023, India.
| | - Priyadarsi D Roy
- Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacan, Ciudad de México C.P. 04510, Mexico.
| | | | - Nagarajan Ramasamy
- Department of Applied Geology, School of Engineering and Science, Curtin University, CDT 250, Miri 98009, Sarawak, Malaysia
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24
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Gu X, Lin C, Xin M, Ouyang W, He M, Liu X, Wang B, Lian M, Lu S. Baseline, enrichment, and ecological risk of arsenic and antimony in the Jiaozhou Bay, a semi-enclosed bay of the Yellow Sea, China. MARINE POLLUTION BULLETIN 2021; 168:112431. [PMID: 33940376 DOI: 10.1016/j.marpolbul.2021.112431] [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: 03/05/2021] [Revised: 04/15/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
Arsenic (As) and antimony (Sb) are toxic metalloids widely distributed in coastal sediments, but are seldom studied for their geochemical baselines. In this study, sediment samples were collected from Jiaozhou Bay (JZB) to evaluate their baselines, contamination, and ecological risk. Results showed that the As and Sb concentrations were between 3.15 and 11.94 mg/kg and 0.20-0.61 mg/kg, respectively. Sc and Fe showed good performance in developing geochemical baseline functions for the metalloids. Organic matter content and clay had significant positive correlations with metalloid abundance in sediments (p < 0.01). In the JZB, As and Sb were not enriched in the sediments, with the enrichment factors below 1. Furthermore, the contamination degrees of As and Sb were low in the JZB. In addition, the ecological risks of As and Sb were relatively low in the JZB, with the risk index between 4.02 and 12.70 and 1.68-5.09, respectively.
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Affiliation(s)
- Xiang Gu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Chunye Lin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Ming Xin
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Wei Ouyang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Mengchang He
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xitao Liu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Baodong Wang
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Maoshan Lian
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Shuang Lu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
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25
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Castelo WFL, Martins MVA, Martínez-Colón M, Guerra JV, Dadalto TP, Terroso D, Soares MF, Frontalini F, Duleba W, Socorro OAA, Geraldes MC, Rocha F, Bergamaschi S. Disentangling natural vs. anthropogenic induced environmental variability during the Holocene: Marambaia Cove, SW sector of the Sepetiba Bay (SE Brazil). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:22612-22640. [PMID: 33420935 DOI: 10.1007/s11356-020-12179-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
Multiproxy approach based on textural, mineralogical, geochemical, and microfaunal analyses on a 176-cm-long core (SP8) has been applied to reconstruct the Holocene paleoenvironmental changes and disentangling natural vs. anthropogenic variability in Marambaia Cove of the Sepetiba Bay (SE Brazil). Sepetiba Bay became a lagoonal system due to the evolution and development of the Marambaia barrier island during the Holocene and the presence of an extensive river basin. Elemental concentrations from pre-anthropogenic layers from the nearby SP7 core have been used to estimate the baseline elemental concentrations for this region and to determine metals enrichment factors (EF), pollution load index (PLI), and sediment pollution index (SPI). Record of the core SP8 provides compelling evidence of the lagoon evolution differentiating the effects of potentially toxic elements (PTEs) under natural vs. anthropic forcing in the last ~ 9.5 ka BP. The study area was probably part of coastal sand ridges between ≈ 9.5 and 7.8 ka BP (radiocarbon date). Events of wash over deposited allochthonous material and organic matter between ≈ 8.6 and 7.8 ka. Climatic event 8.2 ka BP, in which the South American Summer Monsoon was intensified in Brazil causing higher rainfall and moisture was scored by an anoxic event. Accumulation of organic matter resulted in oxygen depletion and even anoxia in the sediment activating biogeochemical processes that resulted in the retention of potentially toxic elements (PTEs). After ≈ 7.8 ka BP at the onset of the Holocene sea-level rise, a marine incursion flooded the Marambaia Cove area (previously exposed to subaerial conditions). Environmental conditions became favorable for the colonization of benthic foraminifera. The Foram Stress Index (FSI) and Exp(H'bc) indicate that the environmental conditions turned from bad to more favorable since ≈ 7.8 ka BP, with maximum health reached at ≈ 5 ka BP, during the mid-Holocene relative sea-level highstand. Since then, the sedimentological and ecological proxies suggest that the system evolved to an increasing degree of confinement. Since ≈ 1975 AD, a sharp increase of silting, Cd, Zn, and organic matter also induced by anthropic activities caused major changes in foraminiferal assemblages with a significant increase of Ammonia/Elphidium Index (AEI), EF, and SPI values and decreasing of FSI and Exp(H'bc) (ecological indicators) demonstrating an evolution from "moderately polluted" to "heavily polluted" environment (bad ecological conditions), under variable suboxic conditions. Thus, core SP8 illustrates the most remarkable event of anthropogenic forcing on the geochemistry of the sediments and associated pollution loads and its negative effect on benthic organisms.
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Affiliation(s)
- Wellen Fernanda Louzada Castelo
- Programa Pós-Graduação em Dinâmica dos Oceanos e da Terra, Universidade Federal Fluminense, UFF, Campus da Praia Vermelha, Niterói, RJ, Brazil
| | - Maria Virgínia Alves Martins
- Faculdade de Geologia, Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, sala 2020A, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil.
- Departamento de Geociências, Universidade de Aveiro, GeoBioTec, Campus de Santiago, 3810-193, Aveiro, Portugal.
| | - Michael Martínez-Colón
- Florida A and M University, School of the Environment, FSH Science Research Center, 1515 South MLK Blvd, Tallahassee, FL, 32307, USA
| | - Josefa Varela Guerra
- Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, UERJ, Rua São Francisco Xavier, 524, 4° andar, Bloco E, sala 4018, Rio de Janeiro, RJ, 20550-900, Brazil
| | - Tatiana Pinheiro Dadalto
- Universidade Federal do Sul da Bahia - UFSB, Rodovia de Acesso para Itabuna, km 39 - Ferradas, Itabuna, BA, 45613-204, Brazil
| | - Denise Terroso
- Departamento de Geociências, Universidade de Aveiro, GeoBioTec, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Maryane Filgueiras Soares
- Faculdade de Geologia, Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, sala 2020A, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Fabrizio Frontalini
- Dipartimento di Scienze Pure e Applicate (DiSPeA), Università degli Studi di Urbino "Carlo Bo", Urbino, Italy
| | - Wânia Duleba
- Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Orangel Antonio Aguilera Socorro
- Instituto de Biologia, Departamento de Biologia Marinha, Laboratorio de Paleoecologia e Mudanças Globais Campus de Gragoatá, Universidade Federal Fluminense, Bloco M, Niterói, Rio de Janeiro, 24210-200, Brazil
| | - Mauro Cesar Geraldes
- Faculdade de Geologia, Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, sala 2020A, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Fernando Rocha
- Departamento de Geociências, Universidade de Aveiro, GeoBioTec, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Sergio Bergamaschi
- Faculdade de Geologia, Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, sala 2020A, Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
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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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27
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Passos JBDMC, Teixeira DBDS, Campos JA, Lima RPC, Fernandes-Filho EI, da Silva DD. Multivariate statistics for spatial and seasonal quality assessment of water in the Doce River basin, Southeastern Brazil. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:125. [PMID: 33587192 DOI: 10.1007/s10661-021-08918-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
This study employed multivariate statistical techniques in one of the main river basins in Brazil, the Doce River basin, to select and evaluate the most representative parameters of the current water quality aspects, and to group the stations according to the similarity of the selected parameters, for both dry and rainy seasons. Data from 63 qualitative monitoring stations, belonging to the Minas Gerais Water Management Institute network were used, considering 38 parameters for the hydrological year 2017/2018. Principal component analysis (PCA) and hierarchical cluster analysis (HCA) were used to reduce the total number of variables and to group stations with similar characteristics, respectively. Using PCA, four principal components were selected as indicators of water quality, explaining the cumulative variance of 68% in the rainy season and 65% in the dry season. The HCA grouped the stations into four groups in the rainy season and three groups in the dry season, showing the influence of seasonality on the grouping of stations. Moreover, the HCA made it possible to differentiate water quality stations located in the headwaters of the basin, in the main river channel, and near urban centers. The results obtained through multivariate statistics proved to be important in understanding the current water quality situation in the basin and can be used to improve the management of water resources because the collection and analysis of all parameters in all monitoring stations require greater availability of financial resources.
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Affiliation(s)
| | | | - Jasmine Alves Campos
- Department of Agricultural Engineering, Universidade Federal de Viçosa - UFV, Viçosa, MG, Brazil
| | | | | | - Demetrius David da Silva
- Department of Agricultural Engineering, Universidade Federal de Viçosa - UFV, Viçosa, MG, Brazil
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28
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An Ecological Risk Assessment of Sediments in a Developing Environment—Batticaloa Lagoon, Sri Lanka. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2021. [DOI: 10.3390/jmse9010073] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The land-sea interface is considered as a threatening environment due to anthropogenic development activities. Unplanned developments can cause effects on important ecosystems, water and human health as well. In this study, the influence of rapid regional development on the accumulation of trace elements to the sediments of an important ecosystem, Batticaloa lagoon, Sri Lanka was examined. Surface sediment pollution status and ecological risk was compared with that of the recent sedimentary history of about 1 m depth. Sediment core samples were collected and analyzed for grain size, organic matter and carbonate contents and trace elements (As, Pb, Zn, Cu, Ni and Cr) by the X-Ray Fluorescence (XRF) technique. The chemical results of core samples and recently published data of surface sediments of the same project were evaluated by pollution load index (PLI), potential ecological risk index (PERI) and sediment quality guidelines (SQG). Except for Cr, all other elements in cores show lower concentrations than the SQGs confirming the high Cr contents as recorded in the most of other Sri Lankan sediments. The sediment cores indicate an unpolluted, low ecological risk sedimentary history for all core sampling locations, whereas most of the surface sediments of the lagoon are less polluted with low potential ecological risk. Present anthropogenic practices and illiteracy of this rapid developing region can damage the green environment and hence environmental management planning is suggested for a sustainable future.
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29
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Zhu F, Yang M, Luo ZX, Yu RL, Hu GR, Yan Y. Bioaccumulation and biotransformation of arsenic in Leptolyngbya boryana. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:29993-30000. [PMID: 32447729 DOI: 10.1007/s11356-020-09294-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
Leptolyngbya boryana (L. boryana) is a typical filamentous cyanobacterium that is widely distributed in aquatic ecosystems and is considered to play an important role in the arsenic biogeochemical cycle. Our results showed that L. boryana resisted arsenite (As(III)) and arsenate (As(V)) concentrations up to 0.25 mM and 5 mM, respectively. When exposed to 100 μM As(III) or As(V) for 4 weeks, L. boryana accumulated as much arsenic as 570.0 mg kg-1 and 268.5 mg kg-1, respectively. After the 4-week exposure to As(III) and As(V), organoarsenicals including dimethylarsenate (DMAs(V)) and oxo-arsenosugar-phosphate (Oxo-PO4) were detected in the cells of L. boryana, while inorganic arsenic, especially As(V), was still the main species in both the cells and medium. Furthermore, arsenic oxidation was observed to be solely caused by L. boryana cells and was considered the dominant detoxification pathway. In conclusion, due to its powerful arsenic accumulation, biotransformation, and detoxification abilities, L. boryana might play an important role in arsenic remediation in aquatic environments.
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Affiliation(s)
- Feng Zhu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Min Yang
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Nanjing, 210042, China
| | - Zhuan-Xi Luo
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China
- Key Laboratory of Karst Dynamics, MNR & Guangxi, Institute of Karst Geology, CAGS, Guilin, 541004, China
| | - Rui-Lian Yu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Gong-Ren Hu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China
- Key Laboratory of Environmental Monitoring of University in Fujian Province, Xiamen, 361024, China
| | - Yu Yan
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China.
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30
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Nunes SM, Müller L, Simioni C, Ouriques LC, Gelesky MA, Fattorini D, Regoli F, Monserrat JM, Ventura-Lima J. Impact of different crystalline forms of nTiO 2 on metabolism and arsenic toxicity in Limnoperna fortunei. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 728:138318. [PMID: 32403012 DOI: 10.1016/j.scitotenv.2020.138318] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 03/24/2020] [Accepted: 03/28/2020] [Indexed: 06/11/2023]
Abstract
Arsenic (As) is a ubiquitous contaminant in the environment and it is known to induce oxidative stress in aquatic organisms. In an attempt to remove As from water, some studies have suggested the titanium dioxide nanomaterial (nTiO2) as a promising alternative. However, it has been observed that nTiO2 can induce toxicity alone or in combination with metals, and this toxicity is dependent on its crystalline form of nanomaterial (mainly rutile as nTiO2R and anatase as nTiO2A, respectively). Considering that both (nTiO2 and As) can occur together, the objective of this study was to evaluate if co-exposure to rutile and anatase may influence accumulation, metabolisation, and toxicity of arsenite (As+3) in the golden mussel Limnoperna fortunei after 48 h of co-exposure to nTiO2 (1 mg/L) and As (50 μg/L). Accumulation and chemical speciation of As in organisms were determined. Also, biochemical analyses, such as the activity of the enzymes glutathione S-transferase omega (GSTΩ), catalase (CAT) and glutathione S-transferase (GST), as well as lipid peroxidation (LPO) were investigated. Results showed that co-exposure to nTiO2A + As changed accumulation pattern of metalloid in gills and digestive gland. Both crystalline forms of nTiO2 affected the metabolisation capacity favoring the accumulation of more toxic As compounds and nTiO2A alone or in combination with As showed induce oxidative stress in gills of L. fortunei. In this way, it has a high potential risk of the co-exposure of these contaminants to aquatic organisms, and it also needs to consider the nanomaterial (nTiO2) properties and their application in the environmental remediation, carefully and judiciously.
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Affiliation(s)
- Silvana Manske Nunes
- Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas, ICB - FURG, Rio Grande, RS, Brazil.
| | - Larissa Müller
- Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas, ICB - FURG, Rio Grande, RS, Brazil
| | - Carmen Simioni
- Programa de Pós-graduação em Biologia Celular e Desenvolvimento, Centro de Ciências Biológicas (CCB), Universidade Federal de Santa Catarina - UFSC, Florianópolis, SC, Brazil
| | - Luciane Cristina Ouriques
- Programa de Pós-graduação em Biologia Celular e Desenvolvimento, Centro de Ciências Biológicas (CCB), Universidade Federal de Santa Catarina - UFSC, Florianópolis, SC, Brazil; Departamento de Biologia Celular, Embriologia e Genética, CCB - UFSC, Florianópolis, SC, Brazil
| | | | - Daniele Fattorini
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche -, Ancona, Italy
| | - Francesco Regoli
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche -, Ancona, Italy
| | - José Maria Monserrat
- Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas, ICB - FURG, Rio Grande, RS, Brazil
| | - Juliane Ventura-Lima
- Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas, ICB - FURG, Rio Grande, RS, Brazil.
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Delgado Quezada V, Altamirano Espinoza M, Bundschuh J. Arsenic in geoenvironments of Nicaragua: Exposure, health effects, mitigation and future needs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 716:136527. [PMID: 32074937 DOI: 10.1016/j.scitotenv.2020.136527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/31/2019] [Accepted: 01/03/2020] [Indexed: 06/10/2023]
Abstract
In contrast to other Latin American countries, where the presence of arsenic (As) in drinking water sources and related adverse human health impacts are well-known, little is internationally known from Nicaragua. However, the As problem is of high relevance as numerous assessments by national research, governmental and non-governmental institutions have proven. To assess for the first time and globally disseminate this predominantly nationally originated information is the aim of this review. In Nicaragua, >1000 water samples have been analyzed for total As from 1991 to 2017. By today, 144 communities distributed within 12 departments and one autonomous region (RACCS) are impacted with As. At least 55,700 people are exposed to drinking water with As (n = 173; range: 10-1320 μg/L, mean: 48.30 μg/L; 21.95%). Arsenic in surface water ranged from 0.99 to 2650 μg/L (n = 124, mean: 65.62 μg/L, 62.9% < 10 μg/L); and in groundwater from 0.10 to 1320 μg/L [n = 624, mean: 20.86 μg/L (70.7% < 10 μg/L)]. The highest As concentration was recorded from a well of the El Zapote community in 1996 (1320 μg/L), alerting national authorities and academic's to research As in water sources and health risks. Since then, 10 μg As/L has been the national regulatory limit for drinking water supplies. Occurrence of high As levels is linked to three geoenvironments: (i) Paleocene-Mesozoic metamorphic rocks (Northern Highlands) where As is present in epithermal veins, (ii) Tertiary volcanic rocks (Central Plateau) where As is related to fossil hydrothermal/volcanic systems, (iii) Quaternary rocks (Nicaragua Depression) where As is caused by active geothermal/volcanic activities. No mitigation measures have been implemented. Incipient water treatment efforts (Kanchan filters activated carbon) have failed because they were not socially accepted. More integrated, cross-sectorial research on genesis, health impacts and problem mitigation is needed. Provision of water treatment units for As removal on a single-household and community scale is needed, calling for the cooperation of national entities with communities in problem detection and solving.
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Affiliation(s)
- Valeria Delgado Quezada
- UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba, Queensland 4350, Australia; Centro para la Investigación en Recursos Acuáticos de Nicaragua (CIRA/UNAN-Managua). Universidad Nacional Autónoma de Nicaragua. Del Hospital Monte España 300 metros al Norte, Managua, Nicaragua
| | - Maximina Altamirano Espinoza
- Centro para la Investigación en Recursos Acuáticos de Nicaragua (CIRA/UNAN-Managua). Universidad Nacional Autónoma de Nicaragua. Del Hospital Monte España 300 metros al Norte, Managua, Nicaragua
| | - Jochen Bundschuh
- UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba, Queensland 4350, Australia.
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Tomaszewska B, Bundschuh J, Pająk L, Dendys M, Delgado Quezada V, Bodzek M, Armienta MA, Muñoz MO, Kasztelewicz A. Use of low-enthalpy and waste geothermal energy sources to solve arsenic problems in freshwater production in selected regions of Latin America using a process membrane distillation - Research into model solutions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 714:136853. [PMID: 32018985 DOI: 10.1016/j.scitotenv.2020.136853] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 01/14/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
The challenge for many communities in Latin America is to find adequate solutions which are feasible given the local economic and technical conditions and which enable them to source water with arsenic concentrations below the WHO guideline value for drinking water (<10 μg/L) of arsenic (As) pollution, suitable for human consumption and the irrigation of crops. Three regions where geothermal fields are present were selected for study out of the several hundred locations in Latin America where the water environment is contaminated with As and where there is a critical water shortage problem. These are Cerro Prieto in Mexico, Momotombo in Nicaragua and Lake Poopó in Bolivia. The paper presents the results of research on the use of low-enthalpy geothermal energy sources and waste heat from geothermal power plants in membrane distillation (MD) processes, which is the only heat-powered membrane technology, in order to obtain potable water and/or water for crop irrigation. It was concluded that MD could be considered as a solution for obtaining water of good quality with a high retention of toxic solutes such as As as well as other different species found in groundwater. In addition, it is not only geothermal energy, but also the geothermal water itself that can be considered as a source of freshwater produced through the MD process, a process which is most suitable to be used in areas where cheap sources of heat are available.
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Affiliation(s)
- Barbara Tomaszewska
- AGH University of Science and Technology, Mickiewicza 30 Av., 30-059 Kraków, Poland.
| | - Jochen Bundschuh
- Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, West Street, 4350, QLD, Australia; UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba, 4350, Queensland, Australia.
| | - Leszek Pająk
- AGH University of Science and Technology, Mickiewicza 30 Av., 30-059 Kraków, Poland.
| | - Marta Dendys
- AGH University of Science and Technology, Mickiewicza 30 Av., 30-059 Kraków, Poland.
| | - Valeria Delgado Quezada
- Centro para la Investigación en Recursos Acuáticos de Nicaragua (CIRA/UNAN-Managua), Universidad Nacional Autónoma de Nicaragua, Del Hospital Monte España 300 metros al Norte, Managua, Nicaragua.
| | - Michał Bodzek
- Institute of Environmental Engineering of the Polish Academy of Sciences, Zabrze, Poland.
| | - Maria Aurora Armienta
- Universidad Nacional Autonoma de Mexico, Instituto de Geofisica, C.U., CDMX 04510, Mexico
| | - Mauricio Ormachea Muñoz
- Instituto de Investigaciones Químicas, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota, Casilla 303, La Paz, Bolivia
| | - Aleksandra Kasztelewicz
- Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Wybickiego 7 str., 31-261 Kraków, Poland.
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Gu X, Ouyang W, Xu L, Tysklind M, Lin C, He M, Wang B, Xin M. Occurrence, migration, and allocation of arsenic in multiple media of a typical semi-enclosed bay. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121313. [PMID: 31590083 DOI: 10.1016/j.jhazmat.2019.121313] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/12/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
Under the gradients of salinity and redox, the transportation and distribution of dissolved, particulate, and sedimentary arsenic present differences from estuary to bay. Samples of water, suspended particulate sediment (SPS), and sediment from the Jiaozhou Bay were analyzed. The concentrations of arsenic decreased significantly from the estuaries toward the bay. The sedimentary arsenic mostly existed as hydrous oxide-bound and residual fractions and tended to be attached to smaller particles. Sedimentary particles were more capable of absorbing arsenic than SPS and the capacity increased from the estuaries toward the bay. The spatial distribution of arsenic was impacted by the residual currents, resulting in higher contents of dissolved arsenic in the eastern coastal zone and higher concentrations of sedimentary arsenic in the inner bay. In water, total phosphorus (TP), dissolved organic carbon (DOC), and alkalinity had significant positive correlations with the dissolved arsenic. In sediments, Fe oxides and sediment organic matter (SOM) would promote adsorption of arsenic. The significant correlation between non-residual fractions and enrichment factors of arsenic indicated that the sedimentary arsenic was more likely to originate from anthropogenic sources, mainly impacted by riverine transport from the eastern urban regions and agricultural production in the western farmland.
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Affiliation(s)
- Xiang Gu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Wei Ouyang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China.
| | - Ling Xu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Mats Tysklind
- Environmental Chemistry, Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden
| | - Chunye Lin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Mengchang He
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Baodong Wang
- The First Institute of Oceanography, State Oceanic Administration, 6 Xianxialing Road, Qingdao, 266061, China
| | - Ming Xin
- The First Institute of Oceanography, State Oceanic Administration, 6 Xianxialing Road, Qingdao, 266061, China
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