RISK ASSESSMENT OF HEAVY METAL IN THE SOIL OF AN ABANDONED PESTICIDE FACTORY AND ITS REMEDIATION EFFECT BY CALCINATION

FENG Tugen; ZHENG Liuqin; ZHANG Jian; ZHANG Fuhai; SONG Jian

doi:10.13205/j.hjgc.202202021

Volume 40 Issue 2

Apr. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(2): 132-138

SHEN Song, LIU Lei, WEN Wei, XING Yi, SU Wei, SUN Jiaqi. POLLUTION CHARACTERIZATION AND SOURCE ANALYSIS OF CARBON COMPONENTS OF PM2.5 IN BEIJING AND SURROUNDING AREAS IN SUMMER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 71-80. doi: 10.13205/j.hjgc.202202012

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FENG Tugen, ZHENG Liuqin, ZHANG Jian, ZHANG Fuhai, SONG Jian. RISK ASSESSMENT OF HEAVY METAL IN THE SOIL OF AN ABANDONED PESTICIDE FACTORY AND ITS REMEDIATION EFFECT BY CALCINATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 132-138. doi: 10.13205/j.hjgc.202202021

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RISK ASSESSMENT OF HEAVY METAL IN THE SOIL OF AN ABANDONED PESTICIDE FACTORY AND ITS REMEDIATION EFFECT BY CALCINATION

doi: 10.13205/j.hjgc.202202021

FENG Tugen^{1,2
,
,},
ZHENG Liuqin^1,2,
ZHANG Jian^1,2,
ZHANG Fuhai^1,2,
SONG Jian^1,2

1. Geotechnical Research Institute, Hohai University, Nanjing 210024, China;
2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China

Received Date: 2021-04-12
Available Online: 2022-04-02
Publish Date: 2022-04-02

Abstract

Abstract

In order to explore the pollution degree of heavy metals in the soil left by an abandoned pesticide factory, and analyze the remediation effect of calcination, this study collected the contaminated soil from an abandoned pesticide factory in Zhejiang Province, and used XRF analyzer to determine the total amount and available contents of heavy metals elements in the soil, discussed the characteristics of heavy metal pollution in the soil. Then the contaminated soil was repaired by calcination, and effect of roasting was evaluated based on potential ecological hazard index method. The results showed that the heavy metal pollution in the site was mainly composed of Zn, Cu, Co, Cr, V and Pb, in which the total and available contents of Zn, V and Pb were lower than the background value of Jinqu basin in Zhejiang Province, while the total and available contents of Cu, Co and Cr all exceeded the background values. The potential ecological risk assessment results based on the available contents of heavy metal showed that the site have reached the fourth level of ecological hazard(very strong). The results of calcination showed that the optimum roasting condition was roasting temperature of 400 ℃ for 1 h. Under this condition, the degree of ecological risk coefficient corresponding to Cu and Cr elements was significantly reduced, and the potential ecological risk assessment results were reduced to the second level(medium). The contaminated site reached a lower harm degree, but further repairing methods were needed to repair the impact of Co on environment. As a simple and efficient remediation technology, calcination can be used not only as a conventional remediation method, but also as an emergency remediation measure for heavy metal contaminated soil.
- soil heavy metals pollution,
- available contents,
- potential ecological risk index method,
- calcination

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References

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