Heavy metals contamination characteristics in soil of different mining activity zones

Guo-li, Liao; Liao, Da-xue; Li, Quanming

doi:10.1016/s1003-6326(08)60037-0

Cited by 55 publications

(19 citation statements)

References 6 publications

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“…These investigations were conducted in six Mn mining areas (Lai et al 2009), one Ti-Pb smelter (Xiang et al 2010), one Ti mine , three Pb/Zn mines in Changning (Wei et al 2009), one Fe mine (Zhuang et al 2013), and one region irrigated by waste water Xiang et al 2011). These areas were well known for producing Pb, Mn, and Zn ores, and the tailings contained Cd ranging from 32.6~224 mg/kg (Liao et al 2008).…”

Section: Spatial Distribution Of Soil CD Concentrations In Arable Lanmentioning

confidence: 99%

Assessment of cadmium (Cd) concentration in arable soil in China

Zhang

Chen

Zhong

et al. 2014

Environ Sci Pollut Res

140

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Cadmium (Cd) concentration in arable soil has drawn broad public attention due to its direct effect on Cd concentration in food. However, there have been few studies of surveying Cd accumulation on the national scale in China. This paper collected 486 studies of Cd concentrations in Chinese arable soil. The results showed that the average Cd concentration was 0.27 mg/kg, higher than its background value, indicating that Cd had been introduced into arable soil by human activity. The Cd concentrations in areas of mining and smelting, urban areas, and areas irrigated by wastewater were obviously higher than that in remote areas. Spatially, Cd concentrations were lower in the north than those in the south, and many hotspots existed throughout China due to mining and smelting activities. Most Cd in the arable soil were accumulated from external sources in all investigated provinces except Ningxia Hui Autonomous Region.

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Section: Spatial Distribution Of Soil CD Concentrations In Arable Lanmentioning

confidence: 99%

Assessment of cadmium (Cd) concentration in arable soil in China

Zhang

Chen

Zhong

et al. 2014

Environ Sci Pollut Res

140

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“…Environmental quality standards for surface water in China of GB 3838-2002 I mainly applicable to national nature reserves and water sources, II mainly applicable to sources of centralized drinking surface water-primary conservation areas, III mainly applicable to sources of centralized drinking surface water-second level conservation areas, IV mainly applicable to water spaces for general industry and entertainment of indirect physical contact, V mainly applicable to water spaces for agriculture and general landscape Soil pollution Soil is easily polluted by lead/zinc mining and smelting activities(Kachenko and Singh 2006;Liao et al 2008). Research(Table 3) has demonstrated that soils and plants adjacent to mining areas are heavily polluted with Pb, Cd and, to a lesser extent, Zn and Cu.…”

mentioning

confidence: 99%

Impacts of lead/zinc mining and smelting on the environment and human health in China

Zhang

Yang

et al. 2011

Environ Monit Assess

481

147

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Mining and smelting are important economic activities. However, mining-related industries are also some of the largest sources of environmental pollution from heavy metals. China is one of the largest producers and consumers of lead and zinc in the world. A large amount of lead, zinc, and related elements, such as cadmium, have been released into the environment due to mineral processing activities and have impacted water resources, soils, vegetables, and crops. In some areas, this pollution is hazardous to human health. This article reviews studies published in the past 10 years (2000-2009), on the environmental and human health consequences of lead/zinc mineral exploitation in China. Polluted areas are concentrated in the following areas: the junction of Yunnan, Guizhou and Sichuan provinces, west-central Hunan province, central Guangxi province, northern Guangdong, northwestern Henan province, the border between Shanxi and Gansu provinces, and the region of Liaoning province near Bohai. Lead (Pb) and cadmium (Cd) are the main pollutants and are associated with human health effects such as high lead blood levels in children, arthralgia, osteomalacia, and excessive cadmium in urine.

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“…In the light of the legislation aimed at safeguarding the environment and the heightened public awareness of environmental issues, remedial action in most of the cases can no longer be postponed (Bone et al 2010) by considering that a gradual increase in the number of abandoned mines and a lack of maintenance or failure of them have severely enhanced the risk of pollution spreading to areas related with mining activities (Liao et al 2008) and their sorroundings (Ciccu et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of different soil layers on porewater to remediate acidic surface environment at a close mine site

Villafane

Igarashi

Harada

et al. 2012

Environ Monit Assess

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This paper describes the chemistry of porewater when constructing different soil layers on acidic weathered rock of a closed mine to remediate the surface environment. Three cases were set on a flat surface of the site, all under different layer systems. Case 1 was only composed of weathered rocks. A top neutralization layer was constructed on the weathered rocks in case 2, whereas both an upper low permeable and middle neutralization layers were constructed on the weathered rocks in case 3. The low permeable layer of 30 cm thick consists of clay, and the neutralization layer of 30 cm thick consists of the mixture of the weathered rock and calcium carbonate as a neutralizer. Porewater sampling systems and soil sensors to measure temperature, water content, and electrical conductivity were set at different depths.In case 1, steadily high concentrations of heavy metals were observed regardless of the depth, and the pH ranged from 2 to 4. In cases 2 and 3, a dramatic decrease in concentrations of heavy metals was observed, even below the neutralization layer. For both cases pH values were circumneutral. There were no significant seasonable changes in heavy metals concentrations and pH of porewater by considering the temperature and precipitation. In addition, the water content of the layers in case 3 fluctuated more mildly than that in cases 1 and 2, indicating that the low permeable layer reduced the rate of infiltration.Therefore, a significant reduction in the load of heavy metals released from the site can be achieved by both implementing neutralization and low permeable layers.

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Heavy metals contamination characteristics in soil of different mining activity zones

Cited by 55 publications

References 6 publications

Assessment of cadmium (Cd) concentration in arable soil in China

Assessment of cadmium (Cd) concentration in arable soil in China

Impacts of lead/zinc mining and smelting on the environment and human health in China

Effect of different soil layers on porewater to remediate acidic surface environment at a close mine site

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