| 徐灿灿 1
，孙 达 2，王根荣 2，李 瑾 2，刘 锐 1
，陈吕军1，3.螯合剂促进印度芥菜修复低汞污染农田土壤[J].广东农业科学,2018,45(12):56-61 |
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螯合剂促进印度芥菜修复低汞污染农田土壤 |
| Accumulation mercury from low contaminated farmland soil by Brassica juncea with the addition of chelators as enhancement… |
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| DOI：10.16768/j.issn.1004-874X.2018.12.010 |
| 中文关键词: 汞污染农田土壤 硫代硫酸钠 富里酸 植物修复 印度芥菜 |
| 英文关键词: mercury contaminated farmland soil sodium thiosulphate fulvic acid phytoremediation Brassica
juncea |
| 基金项目:浙江省农业厅项目“南湖区农业‘两区’土壤修复示范” |
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| 中文摘要: |
| 为了提高低汞污染农田土壤的修复效率，在低汞污染农田土壤中分别投加螯合剂硫代硫酸钠、
富里酸（投加量均为 0.075、0.15、0.225 kg/m2），研究印度芥菜对汞的富集情况，并分析植物生物量和组
织内汞含量及土壤总汞、有效汞含量。结果表明，硫代硫酸钠（0.075~0.225 kg/m2）并未抑制印度芥菜生
长，且能提高植物中总汞的含量，促进植物根部汞向地上部分转运，促进土壤总汞及有效汞含量的降低；
投加富里酸能促进印度芥菜生长，提高植物中总汞的含量，促进土壤总汞及有效汞含量的降低，投加量为
0.075~0.15 kg/m2 时，促进植物根部汞向地上部分转运。硫代硫酸钠、富里酸投加量均为 0.15 kg/m2，修复
后，土壤总汞含量均由 0.45 mg/kg 降低到 0.35 mg/kg，土壤有效汞含量由 1.45 μg/kg 分别降低到 0.57、0.63
μg/kg。投加螯合剂硫代硫酸钠或富里酸，可作为促进印度芥菜修复低汞污染农田土壤的潜在修复技术。 |
| 英文摘要: |
| In order to improve the remediation efficiency of farmland soil with low mercury pollution，the
current study was carried out to investigate the addition of chelating ligands sodium thiosulphate and fulvic acid (0.075,
0.15, 0.225 kg/m2) on mercury accumulation by Brassica juncea and mercury content transformation in soil under field
condition.The biomass and the mercury content in plants and total mercury content and bioavailable mercury content
in soil were analyzed after experiment．The results indicated that the dry biomass of sodium thiosulphate (0.075~0.225
kg/m2) treated plant was closed to that of the control plant．Sodium thiosulphate could enhance B. juncea uptake
of mercury from soil, and transport mercury from soil to aboveground plant biomass. The dry biomass of fulvic acid
treated plant was higher than that of the control plant．Fulvic acid (0.075~0.15 kg/m2) could enhance B. juncea
uptake of mercury from soil, and transport mercury from soil to aboveground plant biomass also. After 0.15 kg/m2 sodium
thiosulphate and fulvic acid treated, the total mercury content in the soil all decreased from 0.45 mg/kg to 0.35 mg/kg, and
the bioavailable concentration of mercury in the soil decreased from 1.45 μg/kg to 0.57, 0.63 μg/kg, respectivly. The
application of chelating ligands sodium thiosulfate or fulvic acid may be a potential remediation technology to promote the remediation of low mercury contaminated farmland soil by B. juncea. |
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