摘要
采用自然土壤作为介质,研究了离子强度、富里酸对纳米TiO2在土壤中迁移性能的影响。结果表明,随着离子强度从0 m M增加至0.5 m M和5 m M,纳米TiO2在土壤中的相对流出浓度(C/C0)从0.85分别降低为0.45和0。然而,体系中含有富里酸时,纳米TiO2在土壤中的迁移能力变强了,5 mg/L和10 mg/L的富里酸分别使n TiO2的相对流出浓度提高到0.89和0.95,大大增加其环境风险。
The impact of ionic strength ( IS) and fulvic acid ( FA) on the transport of TiO2 nanoparticles ( nTiO2 ) in soil was investigated.Results showed that the relative concentration( C/C0 ) of nTiO2 decreased from 0.85 to 0.45 and 0 when the IS concentration increased from 0 mM to 0.5 mM and 5 mM.However, the mobility of nTiO2 enhanced in the presence of FA in the system. The relative concentration ( C/C0 ) of nTiO2 increased to 0.89 and 0.95 when the concentration of FA increased to 5 mg/L and 10 mg/L, which greatly increased the environmental risk.
出处
《广州化工》
CAS
2014年第23期110-111,共2页
GuangZhou Chemical Industry
关键词
离子强度
富里酸
二氧化钛
土壤
迁移
ionic strength
fulvic acid
titanium dioxide
soil
transport