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Pisconte JN, Vega CM, Sayers CJ, Sevillano-Ríos CS, Pillaca M, Quispe E, Tejeda V, Ascorra C, Silman MR, Fernandez LE. Elevated mercury exposure in bird communities inhabiting Artisanal and Small-Scale Gold Mining landscapes of the southeastern Peruvian Amazon. Ecotoxicology 2024:10.1007/s10646-024-02740-4. [PMID: 38363482 DOI: 10.1007/s10646-024-02740-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
Artisanal and Small-Scale Gold Mining (ASGM) represents a significant source of anthropogenic mercury emissions to the environment, with potentially severe implications for avian biodiversity. In the Madre de Dios department of the southern Peruvian Amazon, ASGM activities have created landscapes marred by deforestation and post-mining water bodies (mining ponds) with notable methylation potential. While data on Hg contamination in terrestrial wildlife remains limited, this study measures Hg exposure in several terrestrial bird species as bioindicators. Total Hg (THg) levels in feathers from birds near water bodies, including mining ponds associated with ASGM areas and oxbow lakes, were analyzed. Our results showed significantly higher Hg concentrations in birds from ASGM sites with mean ± SD of 3.14 ± 7.97 µg/g (range: 0.27 to 72.75 µg/g, n = 312) compared to control sites with a mean of 0.47 ± 0.42 µg/g (range: 0.04 to 1.89 µg/g, n = 52). Factors such as trophic guilds, ASGM presence, and water body area significantly influenced feather Hg concentrations. Notably, piscivorous birds exhibited the highest Hg concentration (31.03 ± 25.25 µg/g, n = 12) exceeding known concentrations that affect reproductive success, where one measurement of Chloroceryle americana (Green kingfisher; 72.7 µg/g) is among the highest ever reported in South America. This research quantifies Hg exposure in avian communities in Amazonian regions affected by ASGM, highlighting potential risks to regional bird populations.
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Affiliation(s)
- Jessica N Pisconte
- Centro de Innovación Científica Amazónica (CINCIA), Puerto Maldonado, Madre de Dios, 17000, Perú.
| | - Claudia M Vega
- Centro de Innovación Científica Amazónica (CINCIA), Puerto Maldonado, Madre de Dios, 17000, Perú
- Sabin Center for Environment and Sustainability, and Department of Biology, Wake Forest University, Winston-, Salem, NC, 27106, USA
| | - Christopher J Sayers
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, 90095, USA
| | | | - Martin Pillaca
- Centro de Innovación Científica Amazónica (CINCIA), Puerto Maldonado, Madre de Dios, 17000, Perú
| | - Edwin Quispe
- Centro de Innovación Científica Amazónica (CINCIA), Puerto Maldonado, Madre de Dios, 17000, Perú
| | - Vania Tejeda
- World Wildlife Fund-Peru, Trinidad Moran 853, Lima 14, Lima, Peru
| | - Cesar Ascorra
- Centro de Innovación Científica Amazónica (CINCIA), Puerto Maldonado, Madre de Dios, 17000, Perú
| | - Miles R Silman
- Centro de Innovación Científica Amazónica (CINCIA), Puerto Maldonado, Madre de Dios, 17000, Perú
- Sabin Center for Environment and Sustainability, and Department of Biology, Wake Forest University, Winston-, Salem, NC, 27106, USA
| | - Luis E Fernandez
- Centro de Innovación Científica Amazónica (CINCIA), Puerto Maldonado, Madre de Dios, 17000, Perú
- Sabin Center for Environment and Sustainability, and Department of Biology, Wake Forest University, Winston-, Salem, NC, 27106, USA
- Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, 94305, USA
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Guo Z, Yang J, Sarkodie EK, Li K, Deng Y, Meng D, Miao B, Liu H, Liang Y, Yin H, Liu X, Jiang L. Vertical distribution of the toxic metal(loid)s chemical fraction and microbial community in waste heap at a nonferrous metal mining site. Ecotoxicol Environ Saf 2021; 228:113037. [PMID: 34856484 DOI: 10.1016/j.ecoenv.2021.113037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/01/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Over the past few decades, nonferrous mining has produced numerous waste rock and part of the waste that has not been properly treated was generally dumped at roadsides and hill slopes. However, the vertical distributions of toxic metal(loid)s and composition of microbial communities in waste heap and the under-laid pristine soil are rarely studied. In this work, the fraction-related distributions of toxic metal(loid)s were investigated at a waste heap profile and the indigenous microbial assemblages were also analyzed by Illumina sequencing of 16 s rRNA genes. Results showed that compared to the under-laid pristine soil, content of toxic metal(loid)s, especially Cd, As and Pb, in waste rock layer were higher. Most of As in subsoil existed as non-specifically sorbed and specifically-sorbed fractions, which could be ascribed to the migration from the upper layer. The mobility was significantly correlated with Eh, EC, clay content, CEC and the total content of metal(loid)s. Phyla Proteobacteria, Acidobacteria and Firmicutes dominated the microbial communities. The microbial community compositions at the genus level were similar, but their relative abundances were mainly influenced by pH, CEC, Eh, SOM, and bioavailability content of toxic metal(loid)s. Besides, microbial functions of elements (S, Fe, Mn and As) oxidation/reduction and metabolites (siderophore, biosurfactant, organic acid, phosphatase and urease) potentially were used for pollutants bioremediation.
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Affiliation(s)
- Ziwen Guo
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Jiejie Yang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Emmanuel Konadu Sarkodie
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Kewei Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yan Deng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Delong Meng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Bo Miao
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Hongwei Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yili Liang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Xueduan Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Luhua Jiang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
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Surenbaatar U, Kim BG, Seo JW, Lim HJ, Kwon JY, Kang MK, Altangerel E, Byambaa T, Batbaatar S, Myagmardorj O, Lee CW, Hong YS. Environmental health survey for children residing near mining areas in South Gobi, Mongolia. Ann Occup Environ Med 2021; 33:e10. [PMID: 34754471 DOI: 10.35371/aoem.2021.33.e10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 03/08/2021] [Indexed: 11/20/2022] Open
Abstract
Background We evaluated the level and factors of heavy metal exposure to children residing in the Togttsetsii, Khanbogd, and Bayandalai soums of South Gobi province, Mongolia. Methods A total of 118 children aged 9–12 years were surveyed, and the level of heavy metal exposure in their bodies was investigated. Exposure was investigated by measuring concentrations of heavy metals such as cadmium, lead, and mercury in the blood; mercury concentration in the hair; and total arsenic in the urine. Results Blood cadmium concentration had geometric averages of 0.16 µg/L in the children from Bayandalai, 0.15 µg/L Tsogttsetsii, and 0.16 µg/L Khanbogd. Blood lead concentration showed a relatively higher geometric average of 7.42 µg/dL in the children from Bayandalai compared to 4.78 µg/dL and 5.15 µg/dL in those from Tsogttsetsii and Khanbogd, respectively. While blood mercury concentration was the highest in the children from Bayandalai, with a value of 0.38 µg/L, those from Tsogttsetsii and Khanbogd had similar concentrations of 0.29 µg/L and 0.29 µg/L, respectively. Hair mercury concentration was the highest in the children from Bayandalai, with a value of 78 µg/g, a particularly significant difference, with a concentration of 0.50 µg/g in those from Khanbogd. Urine arsenic concentration was the highest in the children from Khanbogd, with a value of 36.93 µg/L; it was 26.11 µg/L in those from Bayandalai and 23.89 µg/L in those from Tsogttsetsii. Conclusions The high blood lead concentration of children in Bayandalai was judged to be due to other factors in addition to mine exposure; the reason why blood and hair mercury concentration was higher in children from Bayandalai may have been due to exposure to many small-scale gold mines in the area. In the case of Khanbogd, it was estimated that the high arsenic level in urine was caused by the effect of mines.
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Mödlinger M, Trebsche P. Work on the cutting edge: metallographic investigation of Late Bronze Age tools in southeastern Lower Austria. Archaeol Anthropol Sci 2021; 13:125. [PMID: 34721706 PMCID: PMC8550310 DOI: 10.1007/s12520-021-01378-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 06/13/2021] [Indexed: 06/13/2023]
Abstract
This paper analyses 20 Late Bronze Age (ca 1080-800 BC) copper alloy objects to discern their manufacture and the skills of local craftsmen. Several tools and jewellery were studied that originated from a bronze workshop located immediately next to the Prigglitz-Gasteil copper ore mining site and several contemporaneous sites in the surrounding area. The samples were studied with optical microscopy (microstructurally), and SEM-EDXS and XRF (chemical analyses). Our analyses are part of a larger study and suggest that the Prigglitz region's bronze production was not standardized. Particular alloys do not seem to have been chosen for object types or due to their intended use-function. Notably, approximately 20% of the objects contain unalloyed copper inclusions, which are most likely a result of the incomplete mixing of scrap metals and alloys during their production.
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Affiliation(s)
- Marianne Mödlinger
- Dipartimento di Chimica e Chimica Industriale (DCCI), Università degli Studi di Genova, Genoa, Italy
| | - Peter Trebsche
- Institut für Archäologien, Leopold-Franzens-Universität Innsbruck, 6020 Innsbruck, Austria
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Nakata H, Nakayama SMM, Yabe J, Muzandu K, Toyomaki H, Yohannes YB, Kataba A, Zyambo G, Ikenaka Y, Choongo K, Ishizuka M. Clinical biochemical parameters associated with the exposure to multiple environmental metals in residents from Kabwe, Zambia. Chemosphere 2021; 262:127788. [PMID: 33182082 DOI: 10.1016/j.chemosphere.2020.127788] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/27/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
Lead (Pb) interferes with various bodily functions. Although high blood Pb (Pb-B) levels in residents from Kabwe, Zambia have been reported, the accumulation pattern of other metals remains unknown. The study was designed to determine the Pb-B, blood cadmium (Cd-B), and zinc (Zn-B) values of 504 representative samples from Kabwe, as well as the potential associated adverse health effects. The Pb-B level ranged from 0.79 to 154.75 μg/dL and generally increased in areas near the mine. A significant elevation of Cd-B was observed in two areas (0.37 ± 0.26 and 0.32 ± 0.30 μg/L) where the two highest mean Pb-B levels were recorded. By contrast, the Zn-B values did not differ greatly with respect to area. Some blood biochemical parameters relating to hepatic and renal functions were out of the normal range in approximately 20-50% of studied adult participants. The δ-aminolevulinic acid dehydratase (δ-ALAD) activity was significantly inhibited in the two areas contaminated by Pb and Cd. A significant negative relationship was observed between metal levels and clinical parameters, e.g., between Pb-B and δ-ALAD for all the age categories and between Cd-B and the estimated glomerular filtration rate for all the age categories except 0-4 years. The elevated Cd-B in areas near the mine relative to the other areas suggested the potential adverse health effects of Cd and/or the interaction of Pb and Cd. A significant association of metal levels with clinical parameters also indicated the effects of metal exposure on hematopoietic, hepatic, and renal systems.
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Affiliation(s)
- Hokuto Nakata
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan
| | - Shouta M M Nakayama
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan
| | - John Yabe
- The University of Zambia, School of Veterinary Medicine, P.O. Box 32379, Lusaka, Zambia
| | - Kaampwe Muzandu
- The University of Zambia, School of Veterinary Medicine, P.O. Box 32379, Lusaka, Zambia
| | - Haruya Toyomaki
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan
| | - Yared Beyene Yohannes
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan; Department of Chemistry, College of Natural and Computational Science, University of Gondar, Ethiopia
| | - Andrew Kataba
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan; The University of Zambia, School of Veterinary Medicine, P.O. Box 32379, Lusaka, Zambia
| | - Golden Zyambo
- The University of Zambia, School of Veterinary Medicine, P.O. Box 32379, Lusaka, Zambia
| | - Yoshinori Ikenaka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan; Water Research Group, School of Environmental Sciences and Development, North-West University, South Africa
| | - Kennedy Choongo
- The University of Zambia, School of Veterinary Medicine, P.O. Box 32379, Lusaka, Zambia; Fiji National University, College of Agriculture, Fisheries & Forestry, School of Animal and Veterinary Sciences, Koronivia Campus, Suva, Fiji
| | - Mayumi Ishizuka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan.
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Compaore WF, Dumoulin A, Rousseau DPL. Trace element content in cereals from a gold mining site in Burkina Faso and intake risk assessment. J Environ Manage 2019; 248:109292. [PMID: 31351406 DOI: 10.1016/j.jenvman.2019.109292] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/30/2019] [Accepted: 07/17/2019] [Indexed: 06/10/2023]
Abstract
Cereals grown close to mining sites could contain high levels of trace elements which could jeopardize local population health through intake of those crops. This study investigated for the first time the concentration of trace elements, namely arsenic, cadmium, cobalt, chromium, copper, iron, manganese, nickel, lead and zinc in four types of cereals (two of maize and two of sorghum) grown within the perimeter of a gold mine and at three surrounding villages in Burkina Faso. A total of 47 samples were taken. Cereal consumption surveys in those villages were undertaken to evaluate the intake hazard. Average arsenic content trend was Site (0.31 ± 0.56 mg kgdw-1) > Songo (0.18 ± 0.17 mg kgdw-1) > Sighnoguin (0.15 ± 0.10 mg kgdw-1) > Youga (0.10 ± 0.00 mg kgdw-1); subsequently, the average estimated daily intake of Arsenic followed this pattern: Site > Songo > Sighnoguin > Youga with 1.93, 1.08, 0.89 and 0.63 μg kgbw-1 day-1 respectively which all fall below a target hazard quotient of 1. Non-parametric Kruskal-Wallis tests confirmed significant difference of Co, Cu, Fe, Mn and Ni between locations whilst not significant differences were found for As, Cd, Pb and Zn. Considering cereals types, yellow corn from the mine site exhibited As value higher than the Referential dose (2.14 μg kgbw-1 day-1) and consequently a target hazard quotient of 1.97. This finding indicates that there is an intake risk to the local population from dietary intake. Contamination by As could be linked to mining activities on parent rocks that contain As with spread by wind to Songo and Youga. Sighnoguin village is more subject to contamination by agricultural practices. Decontamination of the site and selection of cereals with low uptake capability and some changes to agricultural practices could reduce the hazards.
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Affiliation(s)
- Wendkuuni Florentin Compaore
- Laboratory of Industrial Water and Ecotechnology, Department Green Chemistry and Technology, Ghent University Campus Kortrijk, Graaf Karel de Goedelaan 5, 8500, Kortrijk, Belgium.
| | - Ann Dumoulin
- Laboratory of Industrial Water and Ecotechnology, Department Green Chemistry and Technology, Ghent University Campus Kortrijk, Graaf Karel de Goedelaan 5, 8500, Kortrijk, Belgium
| | - Diederik P L Rousseau
- Laboratory of Industrial Water and Ecotechnology, Department Green Chemistry and Technology, Ghent University Campus Kortrijk, Graaf Karel de Goedelaan 5, 8500, Kortrijk, Belgium
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Midhat L, Ouazzani N, Hejjaj A, Ouhammou A, Mandi L. Accumulation of heavy metals in metallophytes from three mining sites (Southern Centre Morocco) and evaluation of their phytoremediation potential. Ecotoxicol Environ Saf 2019; 169:150-160. [PMID: 30445246 DOI: 10.1016/j.ecoenv.2018.11.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/08/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
The current study aims to perform a field survey of three abandoned mining sites in the southern centre of Morocco to assess the recent metal pollution in soils and accumulation potential of plant species. Native plants and soils were sampled at several sites in the studied mines and analysed for Cu, Zn, Pb and Cd concentrations. Soils in the investigated sites proved to be deficient in major macronutrients and to contain toxic levels of Cu, Zn, Pb and Cd. Botanical survey of the prospected sites showed the abundance of diverse plant communities (46 species and 19 families), with no obvious toxicity symptoms. Results showed that the concentrations of heavy metals were different in the same plant species and from plant species to another. Eight plants of 46 species namely Hirschfeldia incana (L.) Lagr.-Foss, Citrullus vulgaris (L.) Schradi, Portulaca oleracea L., Stipa capensis Thunb., Lactuca viminea (L.) J.Presl & C.Presl, Forsskaolea tenacissima L., Lycium intricatum Boiss. and Hammada scoparia (Pomel) Iljin were considered as the best-performing specimens due to their high ability to accumulate multiple metals in their shoots and roots without being affected by excessive metal contents. This was confirmed by the transfer factors generally higher than 1. Consequently, these tolerant and native plant species could be used as tools for an effective phytorestoration of metal-contaminated sites.
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Affiliation(s)
- Laila Midhat
- National Center for Research and Studies on Water and Energy, CNEREE, Cadi Ayyad University, PO 511, Marrakech, Morocco; Laboratory of Hydrobiology, Ecotoxicology, Sanitation and Global change (LHEAC, CNRST Associated Research Unit, URAC33), Faculty of Sciences Semlalia, Cadi Ayyad University, PO 2390, Marrakech, Morocco
| | - Naaila Ouazzani
- National Center for Research and Studies on Water and Energy, CNEREE, Cadi Ayyad University, PO 511, Marrakech, Morocco; Laboratory of Hydrobiology, Ecotoxicology, Sanitation and Global change (LHEAC, CNRST Associated Research Unit, URAC33), Faculty of Sciences Semlalia, Cadi Ayyad University, PO 2390, Marrakech, Morocco
| | - Abdessamed Hejjaj
- National Center for Research and Studies on Water and Energy, CNEREE, Cadi Ayyad University, PO 511, Marrakech, Morocco
| | - Ahmed Ouhammou
- Laboratory of Environment and Ecology (L2E, CNRST Associated Research Unit, URAC 32), Regional Herbarium MARK, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Laila Mandi
- National Center for Research and Studies on Water and Energy, CNEREE, Cadi Ayyad University, PO 511, Marrakech, Morocco; Laboratory of Hydrobiology, Ecotoxicology, Sanitation and Global change (LHEAC, CNRST Associated Research Unit, URAC33), Faculty of Sciences Semlalia, Cadi Ayyad University, PO 2390, Marrakech, Morocco.
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Guo J, Cao Y, Luo Z, Fang H, Chen Z, Wang D, Xu F, Yan C. Distribution, fractions, and potential release of thallium in acidic soils nearby a waste copper mining site from southern China. Environ Sci Pollut Res Int 2018; 25:17980-17988. [PMID: 29687196 DOI: 10.1007/s11356-018-1964-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 04/04/2018] [Indexed: 06/08/2023]
Abstract
Although thallium (Tl) is a highly toxic element, little information is available on the environmental risks of Tl in agricultural soils with intensive practices, particularly nearby mining sites. Therefore, we investigated the potential release of Tl in acidic soils with intensive cultivation nearby a waste copper mining site from southern China based on its level and chemical fractions as well as simulated release under artificial acid rain. Results showed that the average Tl content was 1.31 mg/kg in the studied area, which significantly exceeds the permissible thallium value of 1 mg/kg for agricultural soil in China. Some vertical increases of soil Tl from different land uses indicate the potential transport of Tl downward to groundwater. High positive correlations between surficial soil Tl and rubidium (Rb) and copper (Cu) indicated that Tl has the lithophile and chalcophile behavior. Tl in soils is mainly entrapped in residual fraction. The exchangeable fraction of Tl in agricultural soils was less than undisturbed natural soils and copper mined soils. Additionally, the percentage of Tl release from undisturbed natural soils and soils of copper ore area was more than that from agricultural soils in simulated acid rain. Furthermore, the releases of Tl from the soils increased with the acidity of artificial acid rain. Thus, more attention must be paid to land management of this similar area to avoid the risk of Tl impact on human health.
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Affiliation(s)
- Jianhua Guo
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yinglan Cao
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China.
| | - Zhuanxi Luo
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
| | - Hongda Fang
- College of Food and Biological Engineering, Jimei University, Xiamen, 361021, China
| | - Zhenfang Chen
- Zhongke Tongheng Environmental Consultation Company, Xiamen, 361021, China
| | - Dapeng Wang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Feifei Xu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Changzhou Yan
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
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Oladipo OG, Ezeokoli OT, Maboeta MS, Bezuidenhout JJ, Tiedt LR, Jordaan A, Bezuidenhout CC. Tolerance and growth kinetics of bacteria isolated from gold and gemstone mining sites in response to heavy metal concentrations. J Environ Manage 2018; 212:357-366. [PMID: 29454247 DOI: 10.1016/j.jenvman.2018.01.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 12/22/2017] [Accepted: 01/12/2018] [Indexed: 06/08/2023]
Abstract
Response and growth kinetics of microbes in contaminated medium are useful indices for the screening and selection of tolerant species for eco-friendly bio-augmentative remediation of polluted environments. In this study, the heavy metal (HM) tolerance, bioaccumulation and growth kinetics of seven bacterial strains isolated from mining sites to 10 HMs (Cd, Hg, Ni, Al, Cr, Pb, Cu, Fe, Mn and Zn) at varied concentrations (25-600 mgL-1) were investigated. The isolates were phylogenetically (16S rRNA gene) related to Lysinibacillus macroides, Achromobacter spanius, Bacillus kochii, B. cereus, Klebsiella pneumoniae, Pseudomonas mosselii and P. nitroreducens. Metal tolerance, effects on lag phase duration and growth rates were assessed using the 96-well micro-titre method. Furthermore, metal bioaccumulation and quantities within cells were determined by transmission electron microscopy and electron dispersive x-ray analyses. Tolerance to Ni, Pb, Fe and Mn occurred at highest concentrations tested. Growth rates increased with increasing Fe concentrations, but reduced significantly (p < .05) with increasing Zn, Cu, Hg, Cd and Al. Significantly higher (p < .05) growth rates (compared to controls) was found with some isolates in Hg (25 mgL-1), Ni (100 mgL-1), Cr (150 mgL-1), Mn (600 mgL-1), Pb (100 mgL-1), Fe (600 mgL-1) and Al (50 mgL-1). Lag phase urations were isolate- and heavy metal-specific, in direct proportion to concentrations. A. spanius accumulated the most Mn and Zn, while B. cereus accumulated the most Cu. Metals accumulated intra-cellularly without cell morphology distortions. The isolates' multi-metal tolerance, intra-cellular metal bioaccumulation and growth kinetics suggest potentials for application in the synergetic biodegradation and bioremediation of polluted environments, especially HM-rich sites.
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Affiliation(s)
- Oluwatosin Gbemisola Oladipo
- Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa.
| | - Obinna Tobechukwu Ezeokoli
- Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa; Microbiology and Environmental Biotechnology Research Group, Agricultural Research Council-Institute for Soil, Climate and Water, Pretoria 0001, South Africa
| | - Mark Steve Maboeta
- Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Jacobus Johannes Bezuidenhout
- Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Louwrens R Tiedt
- Laboratory for Electron Microscopy, Chemical Resource Beneficiation (CRB), North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Anine Jordaan
- Laboratory for Electron Microscopy, Chemical Resource Beneficiation (CRB), North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Cornelius Carlos Bezuidenhout
- Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
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10
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Zhang XY, Carpenter DO, Song YJ, Chen P, Qin Y, Wei NY, Lin SC. Application of the IEUBK model for linking Children's blood lead with environmental exposure in a mining site, south China. Environ Pollut 2017; 231:971-978. [PMID: 28888941 DOI: 10.1016/j.envpol.2017.08.116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 08/29/2017] [Accepted: 08/31/2017] [Indexed: 06/07/2023]
Abstract
This study consisted of a site- and age-specific investigation linking children's blood lead level (BLL) to environmental exposures in a historic mining site in south China. A total of 151 children, aged 3-7 years, were included in this study. The geometric mean (GM) BLL was 8.22 μg/dl, indicating an elevated BLL. The Integrated Exposure Uptake Bio-Kinetic (IEUBK) model has proven useful at many sites for study of routes of exposure. Application of the IEUBK model to these children indicated that the GM difference between observed and predicted BLL levels was only 1.07 μg/dl. It was found that the key environmental exposure pathway was soil/dust intake, which contributed 86.3% to the total risk. Younger children had higher BLL than did older children. Therefore, of the various low risk-high benefit solutions, interventions for the children living near the site should be focused on the dust removal and soil remediation. Implementation of the China Eco-village Construction Plan and China New Rural Reconstruction Movement of the government may be a better solution.
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Affiliation(s)
- Xin-Ying Zhang
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization, Guangxi Teachers Education University, Nanning 530001, China; Institue for Health and the Environment, University at Albany, Rensselaer, NY 12144, USA.
| | - David O Carpenter
- Institue for Health and the Environment, University at Albany, Rensselaer, NY 12144, USA
| | - Yong-Jin Song
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization, Guangxi Teachers Education University, Nanning 530001, China
| | - Ping Chen
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization, Guangxi Teachers Education University, Nanning 530001, China
| | - Yaoming Qin
- Guangxi Children Hospital, Nanning 530001, China
| | - Ni-Yu Wei
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization, Guangxi Teachers Education University, Nanning 530001, China
| | - Shan-Chun Lin
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization, Guangxi Teachers Education University, Nanning 530001, China
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11
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Bui ATK, Nguyen HTH, Nguyen MN, Tran THT, Vu TV, Nguyen CH, Reynolds HL. Accumulation and potential health risks of cadmium, lead and arsenic in vegetables grown near mining sites in Northern Vietnam. Environ Monit Assess 2016; 188:525. [PMID: 27542667 DOI: 10.1007/s10661-016-5535-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 08/09/2016] [Indexed: 06/06/2023]
Abstract
The effect of environmental pollution on the safety of vegetable crops is a serious global public health issue. This study was conducted to assess heavy metal concentrations in soil, irrigation water, and 21 local vegetable species collected from four sites near mining activities and one control site in Northern Vietnam. Soils from vegetable fields in the mining areas were contaminated with cadmium (Cd), lead (Pb), and arsenic (As), while irrigation water was contaminated with Pb. Average concentrations of Pb and As in fresh vegetable samples collected at the four mining sites exceeded maximum levels (MLs) set by international food standards for Pb (70.6 % of vegetable samples) and As (44.1 % of vegetable samples), while average Cd concentrations in vegetables at all sites were below the MLs of 0.2. The average total target hazard quotient (TTHQ) across all vegetable species sampled was higher than the safety threshold of 1.0, indicating a health risk. Based on the weight of evidence, we find that cultivation of vegetables in the studied mining sites is an important risk contributor for local residents' health.
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Affiliation(s)
- Anh T K Bui
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam.
| | - Ha T H Nguyen
- VNU University of Science, Vietnam National University, 334 Nguyen Trai, Hanoi, Vietnam
| | - Minh N Nguyen
- VNU University of Science, Vietnam National University, 334 Nguyen Trai, Hanoi, Vietnam
| | - Tuyet-Hanh T Tran
- Hanoi School of Public Health, Environmental Health, Hanoi,, Vietnam
| | - Toan V Vu
- Thuyloi University, 175 Tay Son Street, Hanoi, Vietnam
| | - Chuyen H Nguyen
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
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