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施用硝酸钾和磷酸二氢钾对土壤镉污染钝化修复效应影响

徐奕,  蒋旭,  徐应明

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文章导航 > 环境工程  > 2024 >  42(12): 229-236
王惠, 张四永, 王亚军. PAC强化MBR工艺处理效果的研究进展[J]. 环境工程, 2020, 38(8): 147-153. doi: 10.13205/j.hjgc.202008025
引用本文: 徐奕, 蒋旭, 徐应明. 施用硝酸钾和磷酸二氢钾对土壤镉污染钝化修复效应影响[J]. 环境工程, 2024, 42(12): 229-236. doi: 10.13205/j.hjgc.202412027
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WANG hui, ZHANG Si-yong, WANG Ya-jun. RESEARCH PROGRESS ON TREATMENT EFFECT OF PAC ENHANCED MBR PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 147-153. doi: 10.13205/j.hjgc.202008025
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
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施用硝酸钾和磷酸二氢钾对土壤镉污染钝化修复效应影响

doi: 10.13205/j.hjgc.202412027

  • 1. 天津市勘察设计院集团有限公司, 天津 300191;

  • 2. 农业农村部环境保护科研监测所, 天津 300191

基金项目: 

天津市科技支撑计划项目(14ZCZDSF00004)

天津市农业科技成果转化与推广项目(201404100)

详细信息
    作者简介:

    徐奕(1994-),女,硕士,主要从事土壤污染调查与修复技术研究。279129258@qq.com

    通讯作者:

    徐应明(1964-),男,博士,研究员,主要研究方向为土壤重金属污染修复。ymxu1999@126.com

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

  • 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

摘要

    摘要
  • 摘要: 钝化修复是土壤镉(Cd)污染常用的修复方式。选取KNO3(K1)和KH2PO4(K2)2种钾肥,通过盆栽试验,研究施加不同含量的2种钾肥对海泡石(S)钝化土壤Cd效应的影响。结果表明:与S处理相比,S+K1处理下,土壤有效态Cd含量增加22.58%~29.03%,但KNO3不同添加量间并无显著差异;S+K2L和S+K2M处理时土壤有效态Cd含量增幅达到6.45%~32.26%,其增幅随着KH2PO4施加量的增加而降低。与S处理相比,在海泡石钝化处理中施加不同含量KNO3,土壤有效态Cu、Zn和Mn含量分别增加7.83%~11.98%、0.54%~6.17%和49.13%~63.83%;施加不同含量KH2PO4可使土壤中有效态Cu、Zn和Mn含量分别增加8.99%~12.44%、25.20%~31.37%和86.65%~94.58%。与S处理相比,S+K1处理显著增加模式植物油菜地上部中Cd含量,增加率为31.79%~43.16%(P<0.05),但S+K2与S处理间无明显差异;此外,在海泡石钝化修复下,添加2种钾肥对油菜地上部Cu、Zn含量同样存在不同程度的影响。该研究结果对Cd污染耕地安全利用中科学施用钾肥提供了参考。
    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.
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