Details

Autor(en) / Beteiligte

• Wang, Yangyang
• Zheng, Kaixuan
• Zhan, Wenhao
• Huang, Luyu
• Liu, Yidan
• Li, Tao
• Yang, Zhihui
• Liao, Qi
• Chen, Runhua
• Zhang, Chaosheng
• Wang, Zhizeng

Titel

Highly effective stabilization of Cd and Cu in two different soils and improvement of soil properties by multiple-modified biochar

Ist Teil von

• Ecotoxicology and environmental safety, 2021-01, Vol.207, p.111294, Article 111294

Ort / Verlag

Netherlands: Elsevier Inc

Erscheinungsjahr

2021

Quelle

ScienceDirect

Beschreibungen/Notizen

• Heavy metal contamination in soil has attracted great attention worldwide. In situ stabilization has been considered an effective way to remediate soils contaminated by heavy metals. In the present research, a multiple-modified biochar (BCM) was prepared to stabilize Cd and Cu contamination in two different soils: a farmland soil (JYS) and a vegetable soil (ZZS). The results showed that BCM was a porous-like flake material and that modification increased its specific surface area and surface functional groups. The incubation experiment indicated that BCM decreased diethylenetriaminepentaacetic (DTPA)-extractable Cd and Cu by 92.02% and 100.00% for JYS and 90.27% and 100.00% for ZZS, respectively. The toxicity characteristic leaching procedure (TCLP)-extractable Cd and Cu decreased 66.46% and 100.00% for JYS and 46.33% and 100.00% for ZZS, respectively. BCM also reduced the mobility of Cd and Cu in soil and transformed them to more stable fractions. In addition, the application of BCM significantly increased the soil dehydrogenase, organic matter content and available K (p < 0.05). These results indicate that BCM has great potential in the remediation of Cd- and Cu-contaminated soil. [Display omitted] •Multiple modifications improved the specific surface area and surface active groups of biochar.•BCM efficiently reduced the bioavailability Cd and Cu.•BCM reduced the leachability of Cd and Cu.•BCM transformed Cd and Cu to a more stable fraction.•BCM improved the properties of Cd- and Cu-contaminated soils.