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。
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.
作者
黎红亮
符云聪
袁毳
朱晓龙
桂娟
戴青云
和君强
邓林
刘代欢
LI Hongliang;FU Yuncong;YUAN Cui;ZHU Xiaolong;GUI Juan;DAI Qingyun;HE Junqiang;DENG Lin;LIU Daihuan(Yonker Environmental Protection Co.,Ltd.,Changsha 410330;Farmland Soil Pollution Prevention and Control and Repair Technology National Engineering Laboratory,Nanjing 210008)
出处
《中国农学通报》
2023年第15期111-117,共7页
Chinese Agricultural Science Bulletin
基金
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)。
