REMEDIATION OF Cd CONTAMINATED SOIL BY ARTIFICIAL STRUVITE COMBINED WITH RYEGRASS

ZHANG Shao-kang; GONG Xiao-feng; LIN Yuan; WU Li; XIONG Jie-qian; WU Jing-lin

doi:10.13205/j.hjgc.202109027

Volume 39 Issue 9

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(9): 193-198

ZHANG Shao-kang, GONG Xiao-feng, LIN Yuan, WU Li, XIONG Jie-qian, WU Jing-lin. REMEDIATION OF Cd CONTAMINATED SOIL BY ARTIFICIAL STRUVITE COMBINED WITH RYEGRASS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 193-198. doi: 10.13205/j.hjgc.202109027

Citation:

ZHANG Shao-kang, GONG Xiao-feng, LIN Yuan, WU Li, XIONG Jie-qian, WU Jing-lin. REMEDIATION OF Cd CONTAMINATED SOIL BY ARTIFICIAL STRUVITE COMBINED WITH RYEGRASS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 193-198. doi: 10.13205/j.hjgc.202109027

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REMEDIATION OF Cd CONTAMINATED SOIL BY ARTIFICIAL STRUVITE COMBINED WITH RYEGRASS

doi: 10.13205/j.hjgc.202109027

1. Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources, Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, China;
2. Wanzai Environmental Protection Agency, Yichun 336100, China

Received Date: 2020-07-10
Available Online: 2022-01-21

Abstract

Abstract

With magnesium chloride as the additive, the artificial struvite was prepared when the ratio of n(Mg²⁺):n(NH₄⁺):n(PO₄^3-) in N and P wastewater was adjusted to be 1.15:1:1, pH was between 8.5 and 9, and the reaction time was 30 min. The product was characterized by SEM, FT-IR and XRD, indicating that struvite was the main content. Artificial struvite combined with ryegrass was used to remediation soil contaminated by Cd. Studies showed that artificial struvite could effectively improve the soil pH, available phosphorus content and enzyme activity to increase soil environmental quality. At the same time, it could reduce the exchangable Cd content in the soil and increase the GSH content in the ryegrass leaves to reduce the MDA content in the leaves and reduce the degree of membrane lipid peroxidation. Compared with the control, the biomass of ryegrass was increased by 81.7%~148.5%, and the total extraction of Cd was increased by 25.41%~44.27%. The remediation efficiency was the best when the additive dosage was 5%.
- artificial struvite,
- Cd,
- soil,
- ryegrass,
- remediation

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References(35)

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