Research on soil multi-media environmental pollution around a Pb-Zn mining and smelting plant in the karst area of Guangxi Zhuang Autonomous Region, Southwest China

Deng, Can-Min; Wang, Shuangfei; Li, Fasheng

doi:10.1007/s11631-009-0188-5

Cited by 12 publications

(5 citation statements)

References 10 publications

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“…The products were transported outside the site by lorries and the waste residues were stacked nearby. Because of industrial effluent and waste residue discharges without treatment during mining and ore-dressing, the soils have high concentrations of heavy metals (Cd, Pb, Zn, Ni, Hg, Cu, As) around the lead-zinc mine and concentrator (Deng et al 2009). As a result of source depletion and environmental pollution, the facility filed for bankruptcy in 2001.…”

Section: Methodsmentioning

confidence: 99%

Spatial and vertical distribution and pollution assessment of soil fluorine in a lead-zinc mining area in the Karst region of Guangxi, China

Zhang¹,

Li²,

Gu³

et al. 2010

Plant Soil Environ.

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Soil pollution of fluorine is a serious environmental problem in the world, and the fluorine pollution evaluation of spatial and vertical distribution study in the Karst region is quite limited. In this study, the farmland around lead-zinc mine in the Karst region was chosen as the study area. Ninety-one upper layer soil samples and two soil profiles (one in paddy field, the other one in aerated field) samples were taken. The average concentration of total fluorine of topsoil in the paddy fields is 378 mg/kg, whereas in the aerated field it is 508 mg/kg. The concentrations of total fluorine in all paddy soil samples and 97.87% aerated field soils are higher than that of the background value of Guangxi. The total fluorine contaminations in all aerated field soils are much higher than in paddy soil samples, so the aerated field is contaminated severely. The vertical distribution of fluorine is different in paddy field and aerated field. In paddy field, the content of fluorine increases from 20 to 40 cm, then it decreases rapidly from 40 to 60 cm in depth, and then increases gradually. However, in the aerated field, the content of fluorine rises gradually with the depth of the sampling point. The results of relative analysis and regression analysis between fluorine in soil and soil properties show that the spatial distribution and vertical variation of fluorine in this region are mainly affected by parent rock.

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Section: Methodsmentioning

confidence: 99%

Spatial and vertical distribution and pollution assessment of soil fluorine in a lead-zinc mining area in the Karst region of Guangxi, China

Zhang¹,

Li²,

Gu³

et al. 2010

Plant Soil Environ.

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“…Biotic and abiotic processes modify the speciation of metal(loid)s and physical-chemical characteristics in tailings (Ye et al, 2017a;Ye et al, 2017b), which facilitate metal(loid)s permeation into soil, surface runoff, and air transportation (Deng et al, 2009;COM, 2016;Jiang et al, 2016;Yi et al, 2016;Yuan and Liu, 2016). Natural attenuation occurs when natural processes (including pedogenesis) are managed to recover an ecosystem to a point where the original fauna and flora are replicated (Clewell, 2000).…”

Section: Introductionmentioning

confidence: 99%

Bacterial diversity in typical abandoned multi-contaminated nonferrous metal(loid) tailings during natural attenuation

Liu

Yao

Wang

et al. 2019

Environmental Pollution

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Abandoned nonferrous metal(loid) tailings sites are anthropogenic, and represent unique and extreme ecological niches for microbial communities. Tailings contain elevated and toxic content of metal(loid)s that had negative effects on local human health and regional ecosystems. Microbial communities in these typical tailings undergoing natural attenuation are often very poorly examined. The diversity and inferred functions of bacterial communities were examined at seven nonferrous metal(loid) tailings sites in Guangxi (China), which were abandoned between 3 and 31 years ago. The acidity of the tailings sites rose over years of site inactivity. Desulfurivibrio, which were always coupled with sulfur/sulfide oxidation to dissimilate the reduction of nitrate/nitrite, were specific in tailings with 3 years abandonment. However, genus beneficial to plant growth (Rhizobium), and iron/sulfur-oxidizing bacteria and metal(loid)-related genera (Acidiferrobacter and Acidithiobacillus) were specific within tailings abandoned for 23 years or more. The increased abundance of acid-generating iron/sulfur-oxidizing and metal(loid)-related bacteria and specific bacterial communities during the natural attenuation could provide new insights for understanding microbial ecosystem functioning in mine tailings. OTUs related to Sulfuriferula, Bacillus, Sulfurifustis, Gaiella, and Thiobacillus genera were the main contributors differentiating the bacterial communities between the different tailing sites.Multiple correlation analyses between bacterial communities and geochemical parameters indicated that pH, TOC, TN, As, Pb, and Cu were the main drivers influencing the bacterial community structures. PICRUSt functional exploration revealed that the main functions were related to DNA repair and recombination, important functions for bacterial adaptation to cope with the multi-contamination of tailings. Such information provides new insights to guide future metagenomic studies for the identification of key functions beyond metal-transformation/resistance. As well, our results offers novel outlooks for the

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“…The increased gradient creates a greater hydraulic head of the water table thereby increasing the flow of contaminated water from the OWTs into the lake. The hydraulic gradient (see section Influence of the Hydraulic Gradient) and percolation rate through soil media (see section CECs in Groundwater) greatly impact pollutant transport (Phillips 1989;Deng et al 2009;Zhang et al 2013;Shrestha et al 2016). Seeing as SS1 is relatively closer to the sinkhole lake waterline and has a steeper slope, the CECs would have less time to degrade and would enter into the lake environment in greater quantities.…”

Section: Presence Of Cecs In the Lakementioning

confidence: 99%

Fate of Contaminants of Emerging Concern in a Sinkhole Lake, Florida, USA

Philip¹,

Upton

Bialkowska-Jelinska

et al. 2020

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Highly karstified carbonate platforms such as Florida are characterized by rapid infiltration rates, highly permeable bedrock and the direct connection to the below aquifer through the high density of sinkholes. This combination of physical features makes the groundwater and aquifers highly vulnerable to contamination from synthetic chemicals commonly referred to as contaminants of emerging concern (CECs). The use of septic tanks, otherwise referred to as onsite water treatment systems (OWTS), promotes the introduction of CECs into the environment. In order to study the impacts of CECs from OWTS on a karst landscape, water, sediment, and vegetation samples were collected in a sinkhole lake surrounded by residential housing using this waste disposal method. The main question of this research project is what is the fate of CECs from OWTSs effluent within the catchment of a sinkhole lake? Liquid chromatograph mass spectrometry was used to analyze the samples for the presence of CECs. It was found that the relative quantity of CECs in the individual constituents is dependent upon 1) the hydrophobicity and polarity of the individual compound, 2) the specific sampling site, 3) the topography gradient, and 4) for vegetation, the connectedness of the sample type to the sediment. Hydrogeological studies have found that the sinkholes of the area are all connected to the below aquifer. Consequently, these CECs pose a risk of the contamination of the groundwater. This study is a temporal snapshot, that being the dry season of Florida which is most likely the time of lowest CEC contamination. It is imperative that sampling extend into the wet season when flushing of CECs from the OWTS may increase their concentrations in both the lake but also the aquifers especially since residents use well water as their source of potable water. While this study is based in Florida, we strongly suspect that our findings and recommendations are applicable more generally as OWTS are used throughout the many karst regions of the world.

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Research on soil multi-media environmental pollution around a Pb-Zn mining and smelting plant in the karst area of Guangxi Zhuang Autonomous Region, Southwest China

Cited by 12 publications

References 10 publications

Spatial and vertical distribution and pollution assessment of soil fluorine in a lead-zinc mining area in the Karst region of Guangxi, China

Spatial and vertical distribution and pollution assessment of soil fluorine in a lead-zinc mining area in the Karst region of Guangxi, China

Bacterial diversity in typical abandoned multi-contaminated nonferrous metal(loid) tailings during natural attenuation

Fate of Contaminants of Emerging Concern in a Sinkhole Lake, Florida, USA

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