EFFECT OF ADDING KNO3 AND KH2PO4 ON IMMOBILIZATION REMEDIATION OF CADMIUM IN POLLUTED SOIL

XU Yi; JIANG Xu; XU Yingming

doi:10.13205/j.hjgc.202412027

Volume 42 Issue 12

Dec. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(12): 229-236

Huo Pan, Cao Liwen, Tian Yanfeng. APPLICATION AND COMPARISON OF AHP AND FUZZYEVALUATION METHOD IN LANDFILL SITING[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(3): 131-135. doi: 10.13205/j.hjgc.201503026

Citation:

XU Yi, JIANG Xu, XU Yingming. EFFECT OF ADDING KNO₃ AND KH₂PO₄ ON IMMOBILIZATION REMEDIATION OF CADMIUM IN POLLUTED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 229-236. doi: 10.13205/j.hjgc.202412027

Huo Pan, Cao Liwen, Tian Yanfeng. APPLICATION AND COMPARISON OF AHP AND FUZZYEVALUATION METHOD IN LANDFILL SITING[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(3): 131-135. doi: 10.13205/j.hjgc.201503026

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EFFECT OF ADDING KNO₃ AND KH₂PO₄ ON IMMOBILIZATION REMEDIATION OF CADMIUM IN POLLUTED SOIL

doi: 10.13205/j.hjgc.202412027

XU Yi¹,
JIANG Xu¹,
XU Yingming^{2
,
,}

1. Tianjin Survey and Design Institute Group Co., Ltd., Tianjin 300191, China;
2. Ago-Environmental Protection Institute of Ministry of Agriculture and Rural Affairs, Tianjin 300191, China

Received Date: 2024-05-21
Available Online: 2025-01-18

Abstract

Abstract

Immobilization remediation is a commonly used remediation method for soil cadmium pollution, but there is poor research on the effect of fertilization on the immobilization remediation of soil Cd pollution. In this paper, KNO₃ (K₁) and KH₂PO₄ (K₂) were added in Cd polluted soil, and sepiolite was used as an amendment. Through the rape pot experiment, the effects of adding different doses of two potassium fertilizers on the remediation effect of soil Cd pollution under the condition of sepiolite immobilization (S) were studied. The results showed that compared with S treatment, in S+K₁ treatment, the soil available Cd content increased by 22.58% to 29.03%, but there was no significant difference between different doses of KNO₃ added. The soil available Cd content increased by 6.45% to 32.26% in S+K₂L and S+K₂M treatments, but decreased with the increase of KH₂PO₄ addition. Compared with S treatment, the content of available Cu, Zn and Mn in soil increased by 7.83% to 11.98%, 0.54% to 6.17% and 49.13% to 63.83%, respectively, when different doses of KNO₃ were added in sepiolite immobilization treatment. Adding different doses of KH₂PO₄ could increase the contents of available Cu, Zn and Mn in soil by 8.99% to 12.44%, 25.20% to 31.37%, and 86.65% to 94.58%, respectively. Compared with S treatment, S+K₁ treatment significantly increased the cadmium content in rape shoot, with an increased rate of 31.79% to 43.16% (P<0.05), but there was no significant difference between S+K₂ and S treatment. In addition, under the immobilization remediation of sepiolite, the addition of two types of potassium fertilizers also had a significant impact on Cu and Zn content in rape shoots. The research results can provide important references for scientific application of potassium fertilizer in the safe utilization of Cd-polluted farmland.
- soil,
- cadmium pollution,
- sepiolite,
- immobilization

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References

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