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中国农学通报

中国农学通报 ›› 2023, Vol. 39 ›› Issue (15): 111-117.doi: 10.11924/j.issn.1000-6850.casb2022-0418

• 资源·环境·生态·土壤 • 上一篇    下一篇

钝化剂对冶炼厂周边中碱性农田土壤重金属及其在小麦中累积的影响

黎红亮1(), 符云聪1(), 袁毳1, 朱晓龙1, 桂娟1, 戴青云1, 和君强1, 邓林1, 刘代欢1,2   

  1. 1 永清环保股份有限公司，长沙 410330
    2 农田土壤污染防控与修复技术国家工程实验室，南京 210008
  • 收稿日期:2022-05-18 修回日期:2022-08-02 出版日期:2023-05-25 发布日期:2023-05-22
  • 通讯作者: 符云聪，男，1988年出生，湖南衡山人，中级工程师，硕士研究生，主要从事环境污染治理与修复研究。通信地址：410330 湖南省长沙市浏阳经开区319国道旁永清环保股份有限公司，Tel：0731-83506688，E-mail：yuncfu@qq.com。
  • 作者简介:

    黎红亮，男，1988年出生，湖南邵阳人，中级工程师，硕士研究生，主要从事环境污染治理与修复研究及项目管理方面的工作。通信地址：410330 湖南省长沙市浏阳经开区319国道旁永清环保股份有限公司，Tel：0731-83506688，E-mail：。

  • 基金资助:
    国家重点研发计划“冶炼场地与周边土壤重金属原位生物固定稳定修复技术及装备研发”(2018YFC1802702); 国家重点研发计划“农田重金属污染阻隔和钝化技术与材料研发”(2016YFD0800700); 湖南省科技厅重点实验室计划“农田土壤重金属污染防控与修复湖南省重点实验室”(2016TP1024)

Effects of Amendment on Heavy Metals in Moderately Alkaline Farmland Soil and Their Accumulation in Wheat Around Smelting Plants

LI Hongliang1(), FU Yuncong1(), YUAN Cui1, ZHU Xiaolong1, GUI Juan1, DAI Qingyun1, HE Junqiang1, DENG Lin1, LIU Daihuan1,2   

  1. 1 Yonker Environmental Protection Co., Ltd., Changsha 410330
    2 Farmland Soil Pollution Prevention and Control and Repair Technology National Engineering Laboratory, Nanjing 210008
  • Received:2022-05-18 Revised:2022-08-02 Online:2023-05-25 Published:2023-05-22

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摘要：

通过冶炼厂周边田间试验，探讨了钝化剂2,4,6-三巯基均三嗪三钠(TMT)对冶炼厂周边中碱性农田中小麦生长末期重金属累积的影响。结果显示：在污染土壤中，添加w=0.10%（质量分数）TMT55材料，60~240 d后土壤DTPA有效态镉含量较对照降低效率为18.50%~41.53%；DTPA有效态铅含量较对照降低效率为21.06%~28.43%。在有效态镉含量为0.97 mg/kg的污染土壤中添加w=0.10%（质量分数）TMT55材料，200 d后小麦根、茎、叶镉含量较对照分别降低32.04%、27.38%、35.39%，240 d后小麦根、茎、叶、籽粒镉含量较对照分别降低18.12%、34.86%、12.39%、20.81%。在有效态铅含量为56.72 mg/kg的污染土壤中添加w=0.10%（质量分数）TMT55材料，200 d后小麦根、茎、叶铅含量较对照分别降低26.84%、23.84%、29.32%，240 d后小麦根、茎、叶、籽粒铅含量较对照分别降低14.34%、46.36%、19.29%、42.40%。TMT55材料能抑制小麦在生长末期对重金属镉和铅的累积，是潜在重金属污染的冶炼厂周边中碱性农田土壤修复材料。

关键词: 2,4,6-三巯基均三嗪三钠(TMT), 冶炼厂周边, 中碱性农田土壤, 钝化剂, 小麦, 镉, 铅

Abstract:

The effect of amendment 2,4,6-trimercaptotriazine trisodium (TMT) on the accumulation of heavy metals at the late growth stage of wheat in moderately alkaline farmland around the smelting plants were investigated through field experiments. The results showed that in the contaminated soil, adding w=0.10% (mass fraction) TMT55, after 60-240 days, the available cadmium (Cd) content of DTPA in soil was reduced by 18.50%-41.53% compared with that of the controlled, and the available lead (Pb) content of DTPA in soil was reduced by 21.06%-28.43%. Adding w=0.10% (mass fraction) TMT55 to the contaminated soil with available Cd content of 0.97 mg/kg, after 200 days, the Cd content of wheat root, stem and leaf decreased by 32.04%, 27.38%, and 35.39%, respectively, compared with those of the controlled; and after 240 days, the Cd content in wheat root, stem, leaf and grain decreased by 18.12%, 34.86%, 12.39% and 20.81%, respectively. Adding w=0.10% (mass fraction) TMT55 to the contaminated soil with available Pb content of 56.72 mg/kg, after 200 days, the Pb content of the wheat root, stem and leaf decreased by 26.84%, 23.84% and 29.32% compared with those of the controlled; and after 240 days, the Pb content in wheat root, stem, leaf and grain decreased by 14.34%, 46.36%, 19.29% and 42.40%, respectively. TMT55 could inhibit the accumulation of cadmium and lead in wheat at the late growth stage, and can be a potential material for the remediation of heavy metal contaminated alkaline farmland soil around smelting plants.

Key words: 2,4,6-trimercaptotriazine trisodium (TMT), around smelting plants, moderately alkaline farmland soil, amendment, wheat, cadmium, lead