螯合剂促进印度芥菜修复低汞污染农田土壤
|
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、0.225kg/m~2),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(0.075～0.225kg/m~2)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0.075～0.15kg/m~2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0.15kg/m~2,修复后,土壤总汞含量均由0.45mg/kg降低到0.35mg/kg,土壤有效汞含量由1.45μg/kg分别降低到0.57、0.63μg/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。
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/m~2) 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/m~2) 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/m~2) could enhance B. juncea uptake of mercury from soil, and transport mercury from soil to aboveground plant biomass also. After 0.15 kg/m~2 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.
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/m~2) 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/m~2) 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/m~2) could enhance B. juncea uptake of mercury from soil, and transport mercury from soil to aboveground plant biomass also. After 0.15 kg/m~2 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.
引文
[1]王新,周启星.土壤Hg污染及修复技术研究[J].生态学杂志,2002,21(3):43-46.
[2]许友卿,丁兆坤.汞对水生动物酶活性影响与机理的研究进展[J].广东农业科学,2012,39(4):117-120.
[3]尹德良,何天容,陈筠,等.不同改良剂对汞矿区水稻汞污染的钝化效果初探[J].广东农业科学,2015,42(8):124-129.
[4]Huang Y,Deng M H,Li T Q,et al.Anthropogenic mercury emissions from 1980 to 2012 in China.Environmental Pollution[J].2017,226:230-239.
[5]Wang J,Feng X,Anderson C W,et al.Remediation of mercury contaminated sitesA review[J].Journal of Hazardous Materials,2012,221(1):1-18.
[6]Xu J,Bravo A G,Lagerkvist A,et al.Sources and remediation techniques for mercury contaminated soil[J].Environment International,2015,74:42-53.
[7]Marchand C,Mench M,Jani Y,et al.Pilot scale aided-phytoremediation of a co-contaminated soil[J].Science of the Total Environment,2018,618(15):12651-12657.
[8]Karimi A,Khodaverdiloo H,Rasouli-Sadaghiani M H.Microbial-enhanced phytoremediation of lead contaminated calcareous soil by Centaurea cyanus L[J].Clean-Soil Air Water,2018,46(2):e1700665.
[9]徐小蓉,张习敏,刘雅妮,等.印度芥菜和蜈蚣草对外源汞胁迫的生理生化响应[J].广东农业科学,2014,41(21):31-36.
[10]王明勇,乙引.一种新发现的汞富集植物--乳浆大戟[J].江苏农业科学,2010,2010(2):354-356.
[11]Moreno F N,Anderson C W N,Stewart R B,et al.Mercury volatilisation and phytoextraction from base-metal mine tailings[J].Environmental Pollution,2005,136(2):341-352.
[12]Wang J X,Feng X B,Anderson C W N,et al.Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soilResults from a greenhouse study[J].Journal of Hazardous Materials,2011,186(1):119-127.
[13]姚爱军,青长乐,牟树森.腐殖酸对矿物结合汞环境迁移性的影响及其机制研究[J].生态学报,2004,24(2):274-277.
[14]Forján R,Rodríguez-Vila A,Cerqueira B,et al.Effects of compost and technosol amendments on metal concentrations in a mine soil planted with Brassica juncea L[J].Environmental Science&Pollution Research,2018(3):1-15.
[15]Gonzaga M,Mackowiak C,Quint?o A D A,et al.Assessing biochar applications and repeated Brassica juncea L.production cycles to remediate Cu contaminated soil[J].Chemosphere,2018,201:278-285.
[16]Wang J X,Feng X B,Christopher W N,et al.Thiosulphate-induced mercury accumulation by plants:metal uptake and transformation of mercury fractionation in soil-results from a field study[J].Plant&Soil,2014,375(1-2):21-33.
[17]王建旭,张军方,冯新斌,等.硫代硫酸铵添加对黄平大黄油菜富集土壤汞的影响田间试验[J].生态毒理学报,2014,9(5):992-997.
[18]Wang J,Xia J,Feng X.Screening of chelating ligands to enhance mercury accumulation from historically mercury-contaminated soils for phytoextraction[J].Journal of Environmental Management,2017,186(2):233-239.
[19]Wang Y,Greger M.Use of iodide to enhance the phytoextraction of mercury-contaminated soil[J].Science of the Total Environment,2006,368(1):30-39.
[2]许友卿,丁兆坤.汞对水生动物酶活性影响与机理的研究进展[J].广东农业科学,2012,39(4):117-120.
[3]尹德良,何天容,陈筠,等.不同改良剂对汞矿区水稻汞污染的钝化效果初探[J].广东农业科学,2015,42(8):124-129.
[4]Huang Y,Deng M H,Li T Q,et al.Anthropogenic mercury emissions from 1980 to 2012 in China.Environmental Pollution[J].2017,226:230-239.
[5]Wang J,Feng X,Anderson C W,et al.Remediation of mercury contaminated sitesA review[J].Journal of Hazardous Materials,2012,221(1):1-18.
[6]Xu J,Bravo A G,Lagerkvist A,et al.Sources and remediation techniques for mercury contaminated soil[J].Environment International,2015,74:42-53.
[7]Marchand C,Mench M,Jani Y,et al.Pilot scale aided-phytoremediation of a co-contaminated soil[J].Science of the Total Environment,2018,618(15):12651-12657.
[8]Karimi A,Khodaverdiloo H,Rasouli-Sadaghiani M H.Microbial-enhanced phytoremediation of lead contaminated calcareous soil by Centaurea cyanus L[J].Clean-Soil Air Water,2018,46(2):e1700665.
[9]徐小蓉,张习敏,刘雅妮,等.印度芥菜和蜈蚣草对外源汞胁迫的生理生化响应[J].广东农业科学,2014,41(21):31-36.
[10]王明勇,乙引.一种新发现的汞富集植物--乳浆大戟[J].江苏农业科学,2010,2010(2):354-356.
[11]Moreno F N,Anderson C W N,Stewart R B,et al.Mercury volatilisation and phytoextraction from base-metal mine tailings[J].Environmental Pollution,2005,136(2):341-352.
[12]Wang J X,Feng X B,Anderson C W N,et al.Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soilResults from a greenhouse study[J].Journal of Hazardous Materials,2011,186(1):119-127.
[13]姚爱军,青长乐,牟树森.腐殖酸对矿物结合汞环境迁移性的影响及其机制研究[J].生态学报,2004,24(2):274-277.
[14]Forján R,Rodríguez-Vila A,Cerqueira B,et al.Effects of compost and technosol amendments on metal concentrations in a mine soil planted with Brassica juncea L[J].Environmental Science&Pollution Research,2018(3):1-15.
[15]Gonzaga M,Mackowiak C,Quint?o A D A,et al.Assessing biochar applications and repeated Brassica juncea L.production cycles to remediate Cu contaminated soil[J].Chemosphere,2018,201:278-285.
[16]Wang J X,Feng X B,Christopher W N,et al.Thiosulphate-induced mercury accumulation by plants:metal uptake and transformation of mercury fractionation in soil-results from a field study[J].Plant&Soil,2014,375(1-2):21-33.
[17]王建旭,张军方,冯新斌,等.硫代硫酸铵添加对黄平大黄油菜富集土壤汞的影响田间试验[J].生态毒理学报,2014,9(5):992-997.
[18]Wang J,Xia J,Feng X.Screening of chelating ligands to enhance mercury accumulation from historically mercury-contaminated soils for phytoextraction[J].Journal of Environmental Management,2017,186(2):233-239.
[19]Wang Y,Greger M.Use of iodide to enhance the phytoextraction of mercury-contaminated soil[J].Science of the Total Environment,2006,368(1):30-39.