HUBEI AGRICULTURAL SCIENCES ›› 2023, Vol. 62 ›› Issue (3): 130-134.doi: 10.14088/j.cnki.issn0439-8114.2023.03.021

• Pollution Control • Previous Articles     Next Articles

Effects of different passivation treatments and foliar blocking agents on remediation of Cd-contaminated rice fields

WANG Jin-wen1, GU Zhu-yu2, PI Jie1, TANG Dong-hai1, ZHOU Zhi-yuan2, ZHANG Jian-yun2   

  1. 1. Songzi Rural Social Development Centre, Songzi 434200,Hubei,China;
    2. Wuhan Xiugu Technology Co., Ltd.,Wuhan 430000,China
  • Received:2022-05-20 Published:2023-04-20

Abstract: Field experiments were carried out in the Cd polluted area of Zhichanghe Town of Songzi City, Jingzhou City, Hubei Province, and analyze the effects of different passivation treatments and foliar blocking agents on soil pH, available Cd and Cd content in brown rice were analyzed. The results showed that different treatments could increase soil pH (0.16%~6.06%) to some extent and decrease the content of available Cd in soil. Compared with the control, the content of available Cd in soil decreased by 3.57%~33.33%. Foliar blocking agents had no significant effect on soil pH and available Cd content, but could effectively inhibit Cd transport in rice and reduce Cd content in brown rice. Soil conditioner and heavy metal passivator could regulate soil pH properly and reduce the content of available Cd in soil, and then reduce the absorption of Cd by rice. 3 750 mL/hm2 foliar blocking agents +1 200 kg/hm2 soil conditioner +1 200 kg/hm2 heavy metal passivator had the best treatment effect. The Cd content in brown rice was the lowest, and the Cd content in soil and brown rice decreased by 33.33% and 44.95%, respectively.

Key words: soil, heavy metal passivator, Cd-contaminated rice fields, conditioners, foliar blocking agents

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