Geochemical partitioning and spatial distribution of heavy metals in soils contaminated by lead smelting

Ke, Wenshun; Zeng, Jiaqing; Zhu, Feng; Luo, Xinghua; Feng, Jingpei; He, Ji; Xue, Rui

doi:10.1016/j.envpol.2022.119486

Cited by 76 publications

(10 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The assessment of heavy metal pollution status in soil has been a major focus of researchers, with investigations conducted on urban soils [ 10 ], roadside soils [ 11 ], soils in urban parks [ 12 ], and urban road dusts [ 13 ]. Heavy metal(oid)s can be released into the environment through natural and anthropogenic sources, with industrial production processes being a significant contributor [ 14 , 15 , 16 ]. Consequently, some researchers have concentrated on developing remedial methods for heavily polluted soils containing heavy metal(oid)s [ 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution and Risk Assessment of Heavy Metal(oid)s Contamination in Topsoil around a Lead and Zinc Smelter in Henan Province, Central China

Liu

et al. 2023

Toxics

View full text Add to dashboard Cite

A total of 137 farmland soil samples were collected around a lead/zinc smelter within 64 km2. The concentration, spatial distribution, and potential source of nine heavy metal(oid)s (As, Cd, Co, Cr, Cu, Ni, Pb, V, and Zn) in soils and their potential ecological risk were investigated in detail. The results showed that the average concentrations of Cd, Pb, Cr and Zn in these soils were higher than their background value in Henan Province, and the average content of Cd was 2.83 times of the risk screening values in the national standard of China (GB 15618-2018). According to the distribution of different heavy metal(oid)s in soils, Cd and Pb in soil decrease gradually with the increase of distance from the smelter to the surrounding area. This indicates that the Pb and Cd originate from smelters via airborne practices according to the typical air pollution diffusion model. The distribution of Zn, Cu, and As were similar to Cd and Pb. However, Ni, V, Cr, and Co were mainly affected by soil parent materials. The potential ecological risk of Cd was higher than those of other elements, and the risk grade of the other eight elements was mainly low. The polluted soils with significantly high and high potential ecological risk covered 93.84% of all the studied regions. This should be of serious concern to government. The results of a principal component analysis (PCA) and cluster analysis (CA) show that Pb, Cd, Zn, Cu, and As were the elements mainly stemmed from smelter and other types of plants, with a contribution rate of 60.08%, while Co, Cr, Ni, and V are mainly caused by nature, with a contribution rate of 26.26%.

show abstract

Section: Introductionmentioning

confidence: 99%

Spatial Distribution and Risk Assessment of Heavy Metal(oid)s Contamination in Topsoil around a Lead and Zinc Smelter in Henan Province, Central China

Liu

et al. 2023

Toxics

View full text Add to dashboard Cite

show abstract

“…Heavy metals are regarded extremely dangerous environmental pollutants because of their high toxicity, carcinogenicity, and nondegradability [ 1 ]. Moreover, most heavy metals have different migration and distribution characteristics—for example, Cd has higher mobility than those of Pb and As—making heavy metal remediation a challenge [ 2 ]. At present, technologies such as adsorption, chemical precipitation, membrane removal, ion exchange, complexation, redox, and phytoremediation have been used for heavy metal remediation [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Review on Rice Husk Biochar as an Adsorbent for Soil and Water Remediation

Zheng

et al. 2023

Plants

View full text Add to dashboard Cite

Rice husk biochar (RHB) is a low-cost and renewable resource that has been found to be highly effective for the remediation of water and soil environments. Its yield, structure, composition, and physicochemical properties can be modified by changing the parameters of the preparation process, such as the heating rate, pyrolysis temperature, and carrier gas flow rate. Additionally, its specific surface area and functional groups can be modified through physical, chemical, and biological means. Compared to biochar from other feedstocks, RHB performs poorly in solutions with coexisting metal, but can be modified for improved adsorption. In contaminated soils, RHB has been found to be effective in adsorbing heavy metals and organic matter, as well as reducing pollutant availability and enhancing crop growth by regulating soil properties and releasing beneficial elements. However, its effectiveness in complex environments remains uncertain, and further research is needed to fully understand its mechanisms and effectiveness in environmental remediation.

show abstract

“…The bioavailability of Pb in soil is not entirely dependent on the total content but is closely related to its morphology and mobility. 5,6 Therefore, how to environmentally, economically, and efficiently reduce the availability of Pb in soil has drawn much attention. 7,8 As one of the important soil nutrients, phosphorus plays an important role in reducing the migration of Pb through precipitation, adsorption, and cation exchange, and phosphate-containing compounds have been widely used to immobilize Pb.…”

Section: Introductionmentioning

confidence: 99%

“…Other studies showed that the average Pb concentration in agricultural soil of China increased slowly after 2000 and reached a peak (90.58 mg/kg) during 2006–2010, which exceeded the risk screening value (90 mg/kg) of the National Soil Environmental Quality Standard of China (GB15618-2018), and the highest concentration of Pb in the farmland around some smelters reached 1200 mg/kg, which exceeded the risk control value (500 mg/kg). The bioavailability of Pb in soil is not entirely dependent on the total content but is closely related to its morphology and mobility. , Therefore, how to environmentally, economically, and efficiently reduce the availability of Pb in soil has drawn much attention. , …”

Section: Introductionmentioning

confidence: 99%

Dual Regulatory Role of Penicillium oxalicum SL2 in Soil: Phosphorus Solubilization and Pb Stabilization

Tong,

Wu,

Jiang

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

The mechanisms of the P. oxalicum SL2-mediated microbial community on phosphorus solubilization and Pb stabilization were investigated through a 90-day soil experiment. In the treatments inoculated with P. oxalicum SL2, the amount of P. oxalicum SL2-GFP remained at 77.8%–138.6% of the initial inoculation amount after 90 days, and the available phosphorus (AP) content increased 21.7%–40.8% while EDTA-Pb decreased 29.9%–43.2% compared with CK treatment. SEM-EDS results showed that P. oxalicum SL2 changed the agglomeration degree of microaggregates and promoted the combination of Pb with C and O elements. These phenomena were enhanced when applied with Ca3(PO4)2. Microbial community analysis showed that P. oxalicum SL2 improved soil microbial activity, in which the fungi absolute abundance increased about 15 times within 90 days. Correlation analyses and a partial least-squares path model showed that the activation of Penicillium, Ascobolus, Humicola, and Spizellomyces in a fungal community increased the content of oxalate and AP, which directly decreased EDTA-Pb content, while the change of Bacillus, Ramlibacter, Gemmatimonas, and Candidatus Solibacter in the bacterial community regulated Fe/Mn/S/N cycle-related functions, thus promoting the conversion of Pb to oxidizable state. Our findings highlight that P. oxalicum SL2 enhanced the microbial-induced phosphate precipitation process by activating soil microbial communities and regulating their ecological functions.

show abstract

Geochemical partitioning and spatial distribution of heavy metals in soils contaminated by lead smelting

Cited by 76 publications

References 73 publications

Spatial Distribution and Risk Assessment of Heavy Metal(oid)s Contamination in Topsoil around a Lead and Zinc Smelter in Henan Province, Central China

Spatial Distribution and Risk Assessment of Heavy Metal(oid)s Contamination in Topsoil around a Lead and Zinc Smelter in Henan Province, Central China

Review on Rice Husk Biochar as an Adsorbent for Soil and Water Remediation

Dual Regulatory Role of Penicillium oxalicum SL2 in Soil: Phosphorus Solubilization and Pb Stabilization

Contact Info

Product

Resources

About