| 巯基改性凹凸棒石黏土对土壤有效态镉及油菜吸收镉的影响 |
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| 引用本文： | 付成,雷泞菲,裴向军,李军亚,徐欢,苏鑫,朱霞萍.巯基改性凹凸棒石黏土对土壤有效态镉及油菜吸收镉的影响[J].岩石矿物学杂志,2022,41(5):941-949. |
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| 作者姓名： | 付成 雷泞菲 裴向军 李军亚 徐欢 苏鑫 朱霞萍 |
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| 作者单位： | 成都理工大学 环境与土木工程学院, 四川 成都 610059;四川省地质矿产勘查开发局 四○五地质队, 四川 成都 611830;成都理工大学 材料与化学化工学院, 四川 成都 610059 |
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| 基金项目： | 四川省科技支撑项目(2019YFN0148);四川省地矿局405队创新基金项目(KJCX-2020-007) |
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| 摘 要： | 重金属不可降解,长期存在于土壤环境会严重影响作物安全。添加巯基改性凹凸棒石黏土(ATP-SH)到不同Cd污染程度土壤中,进行盆栽油菜实验,以石墨炉原子吸收光谱法测定了土壤有效态Cd和油菜不同部位Cd的含量;采用SPSS讨论了ATP-SH添加量、土壤有效态Cd、油菜不同部位Cd的相关性;计算了油菜对Cd的富集系数及转运系数,探究了ATP-SH对土壤Cd的钝化效果及对油菜富集和转运Cd的影响。实验结果显示,添加ATP-SH后,土壤有效态Cd、油菜各部位Cd含量显著降低,土壤有效态Cd降低率为40.65%~74.27%,油菜根、茎、枝、菜籽中Cd降低率分别为29.36%~79.46%、41.44%~88.45%、43.19%~95.89%和38.02%~95.81%;ATP-SH添加量与土壤有效态Cd、油菜各部位Cd含量均呈显著或极显著负相关,土壤有效态Cd与油菜各部位Cd含量均呈显著或极显著正相关,油菜各部位之间的Cd含量存在明显正相关关系;对照组油菜根、茎、枝、菜籽对Cd的富集系数分别是实验组的1.42~4.87倍、1.71~8.66倍、1.92~24.43倍、1.61~23.76倍,油菜各部位Cd的转运系数的大小是茎＞枝＞菜籽,且茎远大于枝和菜籽,是枝和菜籽转运系数的3.5~25倍。综上,ATP-SH能降低土壤Cd的生物有效性,阻隔土壤Cd向油菜迁移。
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| 关 键 词： | 巯基改性 凹凸棒石 土壤修复 Cd 油菜 |
| 收稿时间： | 2022/1/27 0:00:00 |
Effects of sulfhydryl-modified attapulgite on available cadmium in soil and cadmium absorption by rape |
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| FU Cheng,LEI Ning-fei,PEI Xiang-jun,LI Jun-y,XU Huan,SU Xin,ZHU Xia-ping.Effects of sulfhydryl-modified attapulgite on available cadmium in soil and cadmium absorption by rape[J].Acta Petrologica Et Mineralogica,2022,41(5):941-949. |
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| Authors: | FU Cheng LEI Ning-fei PEI Xiang-jun LI Jun-y XU Huan SU Xin ZHU Xia-ping |
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| Institution: | College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China;405 Geological Brigade of Sichuan Bureau of Geology & Mineral Resources, Chengdu 611830, China;College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | Heavy metals are non-degradable,they exist in the soil environment for a long time,seriously affecting the safety of crops.The sulfhydryl-modified attapulgite (ATP-SH) was added to the soils with different Cd pollution levels to conduct potted rape experiments,and the available Cd in soil and Cd in different parts of rape were determined by graphite furnace atomic spectrometry.The correlation among the addition amount of ATP-SH,the available Cd in soil,and Cd in different parts of rape were discussed by SPSS.The bioconcentration factors and translocation factors of Cd in rape were calculated,the passivation effect of ATP-SH on soil Cd and its effect on the bioconcentration and translocation of Cd in rape were studied.After adding ATP-SH,the available Cd in soil and Cd in different parts of rape significantly reduce,variation range of available Cd reduction rate in soil are 40.65%~74.27%,and variation range of available Cd reduction rate in rape root,stem,limb and rapeseed were 29.36%~79.46%,41.44%~88.45%,43.19%~95.89% and 38.02%~95.81%,respectively.The addition of ATP-SH has significant or extremely significant negative correlation with available Cd in soil and the content of Cd in all parts of rape.There are significant or extremely significant positive correlation between soil available Cd and the content of Cd in all parts of rape.There are significant positive correlation among the content of Cd in all parts of rape.In the control group,the bioconcentration factors of Cd in rape roots,stems,limbs and rapeseed respectively are 1.42~4.87 times,1.71~8.66 times,1.92~24.43 times and 1.61~23.76 times higher than that of the experimental group.The order of translocation factors of Cd in rape is sti>limb>rapeseed,the translocation factors of Cd in stem are 3.5~25 times higher than that in limb and rapeseed.ATP-SH can reduce the activity of soil Cd and effectively prevent the migration of Cd from soil to rape. |
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| Keywords: | sulfhydryl-modified attapulgite soil remediation Cd rape |
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