铁基材料对锑(Sb)污染土壤的稳定化效果研究
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摘要
在实验室条件下研究了还原铁粉、硫酸亚铁、FeCl_3、针铁矿、水铁矿对污染土壤中Sb的稳定化效果。结果表明,当添加量为2%,养护时间为3 d时,各铁基材料对土壤中Sb的稳定化效果排序为FeCl_3>水铁矿>还原铁粉>硫酸亚铁>针铁矿。五种铁基材料对土壤中的Sb的稳定化效果随添加量与养护时间的增加而增加。通过Tessier连续提取法分析结果可知,铁基材料的加入有效降低了土壤中Sb的可交换态比例,显著地增加了铁锰结合态与残留态的比例。
The stabilization effect of five kinds of iron-based materials,including reduced iron powder,ferrous sulfate,ferric chloride,goethite and ferrihydrite,on Sb immobilization were investigated under laboratory conditions. The results showed that the stabilization efficiency of Sb increased with increasing iron-based materials amount. At 2% of materials addition,after immobilized for 3 days,the stabilization efficiency of such materials decreased as the following order: ferric chloride > ferrihydrite > reduced iron powder > ferrous sulfate > goethite. The results of Tessier sequential extraction procedures showed that the exchangeable fraction of Sb in soil decreased after materials application,and considerable increase in Sb was observed in the bound to Fe-Mn oxides fraction and residual fraction.
The stabilization effect of five kinds of iron-based materials,including reduced iron powder,ferrous sulfate,ferric chloride,goethite and ferrihydrite,on Sb immobilization were investigated under laboratory conditions. The results showed that the stabilization efficiency of Sb increased with increasing iron-based materials amount. At 2% of materials addition,after immobilized for 3 days,the stabilization efficiency of such materials decreased as the following order: ferric chloride > ferrihydrite > reduced iron powder > ferrous sulfate > goethite. The results of Tessier sequential extraction procedures showed that the exchangeable fraction of Sb in soil decreased after materials application,and considerable increase in Sb was observed in the bound to Fe-Mn oxides fraction and residual fraction.
引文
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[4]Andrew B C,Laurence H,Raymond L W.Use of iron-based technologies in contaminated land and groundwater remediation:A review[J].Science of Total Environment,2008,400(1):42-51.
[5]齐翠翠.锑在中国煤及典型矿区中的环境地球化学研究[D].合肥:中国科学技术大学,2010.
[6]项萌,张国平,李玲,等.广西河池锑矿冶炼区土壤中锑等重金属的分布特征及影响因素分析[J].地球与环境,2010,38(4):495-500.
[7]Indika H,Meththika V,Jochen B.Antimony as a global dilemma:Geochemistry,mobility,fate and transport[J].Environment Pollution,2017,223:545-559.
[8]Gabrirla U,Silvia S,Rui B,et al.Arsenic and antimony in water and wastewater:Overview of removal techniques with special reference to latest advances in adsorption[J].Journal of Environmental Management.2015,151,326-342.
[9]张弛,钟重,韦彦斐,等.铁基材料在污染场地修复中的应用研究进展[J].环境科学与技术,2014,37(7):128-132.
[10]Atkinson R J,Posner A M,Quirk J P,et al.Phosphate adsorption on goethite(α-Fe OOH)[J].Nature,1976,264:740-742.
[11]Pengfei Q,Thomas P.Competitive adsorption of As(III),As(V),Sb(III)and Sb(V)onto ferrihydrite in multi-component systems:Implications for mobility and distribution[J].Journal of Hazardous Materials.2017,330,142-148.
[12]Tessier,P G C Campbell,Bisson M.Sequential extraction procedure for the speciation of particulate trace metals[J].Analytical Chemistry,1979,51(7):844-851.
[13]Saeed B,Amir L,Amir F,et al.In situ stabilization of As and Sb with naturally occurring Mn,Al and Fe oxides in calcareous soil:Bioaccessibility,bioavailability and speciation studies[J].Journal of Hazardous Materials,2014,273:247-252.
[14]Suan C W,Peter V L,Paul M A,et al.The chemistry and behavior of antimony in the soil environment with comparison to arsenic:A critical review[J].Environmental Pollution,2010,151:1 169-1 181.
[15]徐伟,刘锐平,曲久辉,等.铁锰复合氧化物吸附去除五价锑性能研究[J].环境科学学报,2012,32(2):270-275.
[16]Sposito G.The Chemistry of Soils[M].Oxford,UK:Oxford University Press,2008.
[17]Chmielewska E,Tylus W,et al.Structure investigation of nanoFe O(OH)modified clinoptilolite tuff for antimony removal[J].Microporous and Mesoporous Materials,2017,248:222-233.
[18]胡丽琼,曾敏,雷鸣,等.含铁材料对污染水稻土中砷的稳定化效果[J].环境工程学报,2014,8(4):1 599-1 604.