PASSIVATION OF CADMIUM IN SOIL BY WALNUT SHELL BIOCHAR

LU Xiu-guo; WU Jin-jin; ZHENG Yu-jia

doi:10.13205/j.hjgc.202011032

Volume 38 Issue 11

Apr. 2021

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LU Xiu-guo, WU Jin-jin, ZHENG Yu-jia. PASSIVATION OF CADMIUM IN SOIL BY WALNUT SHELL BIOCHAR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 196-202. doi: 10.13205/j.hjgc.202011032

Citation:

LU Xiu-guo, WU Jin-jin, ZHENG Yu-jia. PASSIVATION OF CADMIUM IN SOIL BY WALNUT SHELL BIOCHAR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 196-202. doi: 10.13205/j.hjgc.202011032

LU Xiu-guo, WU Jin-jin, ZHENG Yu-jia. PASSIVATION OF CADMIUM IN SOIL BY WALNUT SHELL BIOCHAR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 196-202. doi: 10.13205/j.hjgc.202011032

Citation:

LU Xiu-guo, WU Jin-jin, ZHENG Yu-jia. PASSIVATION OF CADMIUM IN SOIL BY WALNUT SHELL BIOCHAR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 196-202. doi: 10.13205/j.hjgc.202011032

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PASSIVATION OF CADMIUM IN SOIL BY WALNUT SHELL BIOCHAR

doi: 10.13205/j.hjgc.202011032

School of Civil Engineering and Architecture, East China Jiao Tong University, Nanchang 330013, China

Received Date: 2019-09-05
Available Online: 2021-04-23
Publish Date: 2021-04-23

Abstract

Abstract

The effects of walnut shell biochar (BC400, BC500, BC600) on pH and Cd morphology distribution in artificial Cd-contaminated soil (20 mg/kg) were studied through laboratory simulation experiments, and possible repair mechanisms were investigated. The results showed that after 56 days of remediation, compared with the blank control group, with 10% dosage of walnut shell biochar BC400, BC500 and BC600, the soil pH increased by 1.07, 1.31 and 1.38, the content of extractable Cd decreased by 17.02%, 20.20% and 24.53%, the reducible Cd content decreased by 8.9%, 19.1% and 38.2%, the oxidizable Cd content increased by 44.83%, 78.45% and 100%, and the residual Cd content increased by 66.03%, 71.43%, 89.21%. At the same time, there was a significant negative correlation between soil pH and soil extractable Cd content (P<0.01). Walnut shell biochar was proved to have the performance in passivating and repairing Cd-contaminated soil.
- walnut shell biochar,
- soil heavy metals,
- Cd,
- repair

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References(46)

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