Environmental contamination of heavy metals from zinc smelting areas in Hezhang County, western Guizhou, China

Bi, Xiangyang; Feng, Xinbin; Yang, Yuangen; Qiu, Guangle; Li, Guanghui; Li, Feili; Liu, Taoze; Fu, Zhiyong; Jin, Zhensheng

doi:10.1016/j.envint.2006.05.010

Cited by 261 publications

(115 citation statements)

References 23 publications

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“…Results from the present and previous studies [8,13,[20][21][22] demonstrate that the plants grown on contaminated-soils may contain PAHs and HMs in their tissues which pose a major health concern. PAHs may be taken up through several pathways including the aerial absorption of volatile compounds by leaves, deposition and penetration of contaminated soil particles and dusts on leaves, and soil-to-root transfer of contaminants followed by subsequent translocation by the transpiration stream.…”

Section: Discussionsupporting

confidence: 54%

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Accumulation of polycyclic aromatic hydrocarbons and heavy metals in lettuce grown in the soils contaminated with long-term wastewater irrigation

Khan

Lin

Zhang

et al. 2008

Journal of Hazardous Materials

252

119

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Accumulation of polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs) by crop plants from contaminated soils may pose health risks. A greenhouse pot experiment using lettuce (Lactuca satuva L.) as a representative vegetable was conducted to assess the concentrations of PAHs and HMs in vegetables grown in wastewater-contaminated soils. The concentrations of total PAHs were ranged from 1.5 to 3.4 mg kg −1 in the contaminated soils, while 1.2 mg kg −1 in the reference soil. Linear regression analyses showed that the relationships between soil and shoot PAH concentrations were stronger for LMW-PAHs (R 2 between 0.51 and 0.92) than for HMW-PAHs (R 2 0.02 and 0.60), suggesting that translocation for LMW-PAHs is faster than HMW-PAHs. Furthermore, the data imply that root uptake was the main pathway for HMW-PAHs accumulation. The plant shoots were also highly contaminated with HMs, particularly Cd (0.4-0.9 mg kg −1 ), Cr (3.4-4.1 mg kg −1 ), Ni (11.7-15.1 mg kg −1 ) and Pb (2.3-5.3 mg kg −1 ), and exceed the guidance limits set by State Environmental Protection Administration (SEPA), China and the World Health Organization (WHO). This study highlights the potential health risks associated with cultivation and consumption of leafy vegetables on wastewater-contaminated soils.

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Section: Discussionsupporting

confidence: 54%

“…Accumulation of HMs by agricultural crops is also a public health concern [20,27]. This study shows that elevated concentrations of HMs were accumulated in plants grown in contaminated soils.…”

Section: Discussionmentioning

confidence: 71%

Accumulation of polycyclic aromatic hydrocarbons and heavy metals in lettuce grown in the soils contaminated with long-term wastewater irrigation

Khan

Lin

Zhang

et al. 2008

Journal of Hazardous Materials

252

119

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“…Furthermore, our results showed that continuous wastewater irrigation led to elevated levels of heavy metals in the soils and in edible parts of food crops. Heavy metal accumulation by vegetables is a cause of serious concern due to the potential public health impacts (Bi et al, 2006;Cui et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

Khan

Cao

Zheng

et al. 2008

Environmental Pollution

2,073

912

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Long-term wastewater irrigation leads to buildup of heavy metals in soils and food crops. AbstractConsumption of food crops contaminated with heavy metals is a major food chain route for human exposure. We studied the health risks of heavy metals in contaminated food crops irrigated with wastewater. Results indicate that there is a substantial buildup of heavy metals in wastewater-irrigated soils, collected from Beijing, China. Heavy metal concentrations in plants grown in wastewater-irrigated soils were significantly higher (P 0.001) than in plants grown in the reference soil, and exceeded the permissible limits set by the State Environmental Protection Administration (SEPA) in China and the World Health Organization (WHO). Furthermore, this study highlights that both adults and children consuming food crops grown in wastewater-irrigated soils ingest significant amount of the metals studied. However, health risk index values of less than 1 indicate a relative absence of health risks associated with the ingestion of contaminated vegetables.

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“…Li et al (2011) found the metal concentrations in soils near a Pb/Zn smelter in east Hunan province, China decreased with increasing distance from the smelter in the dominant wind direction. Bi et al (2006) reported the heavy metals (Zn, Pb, and Cd) concentrations in the topsoil of a zinc smelting areas in Hezhang County, western Guizhou, China dropped more rapidly at upwind direction than those at downwind direction. Therefore, the observed trend of metal distribution in topsoil could be mainly related by smelter dust emissions.…”

Section: Spatial Distribution Of Heavy Metals In Topsoilmentioning

confidence: 99%

Concentrations, spatial distribution, and risk assessment of soil heavy metals in a Zn-Pb mine district in southern China

Zhang

et al. 2016

Environ Monit Assess

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China is one of the largest producers and consumers of lead and zinc in the world. Lead and zinc mining and smelting can release hazardous heavy metals such as Cd, Pb, Zn, and As into soils, exerting health risks to human by chronic exposure. The concentrations of Cd, Zn, Pb, and As in soil samples collected from a PbZn mining area with exploitation history of 60 years were investigated. Health risks of the heavy metals in soil were evaluated using US Environmental Protection Agency (US EPA) recommended method. A geo-statistical technique (Kriging) was used for the interpolation of heavy metals pollution and Hazard Index (HI). The results indicated that the long-term Pb/Zn mining activities caused the serious pollution in the local soil. The concentrations of Cd, As, Pb, and Zn in topsoil were 40.3 ± 6.3, 103.7 ± 37.3, 3518.4 ± 896.1, and 10,413 ± 2973.2 mg/kg dry weight, respectively. The spatial distribution of the four metals possessed similar patterns, with higher concentrations around Aayiken (AYK), Maseka (MSK), and Kuangshan (KS) area and more rapidly dropped concentrations at upwind direction than those at downwind direction. The main pollutions of Cd and Zn were found in the upper 60 cm, the Pb was found in the upper 40 cm, and the As was in the upper 20 cm. The mobility of metals in soil profile of study area was classed as Cd > Zn ≫ Pb > As. Results indicated that there was a higher health risk (child higher than adult) in the study area. Pb contributed to the highest Hazard Quotient (57.0~73.9 %) for the Hazard Index.

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Environmental contamination of heavy metals from zinc smelting areas in Hezhang County, western Guizhou, China

Cited by 261 publications

References 23 publications

Accumulation of polycyclic aromatic hydrocarbons and heavy metals in lettuce grown in the soils contaminated with long-term wastewater irrigation

Accumulation of polycyclic aromatic hydrocarbons and heavy metals in lettuce grown in the soils contaminated with long-term wastewater irrigation

Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

Concentrations, spatial distribution, and risk assessment of soil heavy metals in a Zn-Pb mine district in southern China

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