Effects of Remedies on the Remediation of Typical Pb and Zn-contaminated soil in Huanjiang, Guangxi

Due to the collapse of the Pb/Zn tailing dam of Huanjiang, Guangxi, the farmland along Huanjiang River are strongly acidic and heavy metal-contaminated, resulting in the loss of agricultural production. To explore some remedies and the migration of heavy metals in heavy metal contaminated-soil of Hu...

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Published inHuanjing kexue Vol. 36; no. 6; p. 2306
Main Authors Zeng, Wei-quan, Song, Bo, Yuan, Li-zhu, Huang, Yu-fei, Fu, Feng-yan
Format Journal Article
LanguageChinese
Published China 01.06.2015
Subjects
Agriculture
Amides
Calcium Compounds
China
Environmental Restoration and Remediation
Fertilizers
Immobilization
Lead - chemistry
Oxides
Phosphates
Polypropylenes
Rivers
Soil - chemistry
Soil Pollutants - isolation & purification
Zinc - chemistry
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Summary:Due to the collapse of the Pb/Zn tailing dam of Huanjiang, Guangxi, the farmland along Huanjiang River are strongly acidic and heavy metal-contaminated, resulting in the loss of agricultural production. To explore some remedies and the migration of heavy metals in heavy metal contaminated-soil of Huanjiang, this study investigated the effects of different types of amendments (lime, calcium magnesium phosphate, organic fertilizer, polypropylene amide) on tested soils through soil leaching test. The results showed that T1 soil was severely acidified, reducing the pH of the soil layer to clean contact, while T2, T3, T4, T5 could significantly improve the contaminated soil pH, ranging from 2.7 to 3.2, 1.6 to 2.7 respectively. Compared with T1, in the contaminated soil at 0-20 cm, T2, T3, T4, T5 could effectively activate Pb and immobilize Zn. Compared with T1, in 20-60 cm clean soil, there was no significant differences in the effect of different treatments on DTPA-Pb and DTPA-Zn (P < 0.05). Compared with T1, T4
ISSN:0250-3301
DOI:10.13227/j.hjkx.2015.06.052