腐殖酸和磷酸盐对纳米TiO_2颗粒迁移的影响  

Effects of humic acid and phosphate on the transport of titania nanoparticles

作　　者：徐小婷 王聪磊 徐楠 

机构地区：[1]苏州科技大学化学生物与材料工程学院,江苏苏州215009 [2]江苏省环境功能材料重点实验室,江苏苏州215009

出　　处：《苏州科技大学学报（自然科学版）》2017年第4期42-46,共5页Journal of Suzhou University of Science and Technology（Natural Science Edition）

基　　金：国家自然科学基金面上研究项目(21377090);江苏省自然科学基金资助项目(BK20131152);苏州科技大学研究生科研创新计划资助项目(SKCX15_068)

摘　　要：通过研究纳米TiO_2对溶液中磷酸盐的吸附,以及磷酸盐、腐殖酸(HA)浓度、pH值对纳米TiO_2团聚性能的影响,探究HA和磷酸盐的协同作用对纳米TiO_2颗粒在石英砂柱中迁移行为的影响。结果表明:酸性条件下(pH=6.0)纳米TiO_2颗粒对磷酸盐的吸附能力大于碱性条件(pH=8.0),从而导致纳米颗粒更容易聚沉;HA可以抑制纳米TiO_2颗粒团聚从而促进其在磷酸盐溶液中的迁移,但HA浓度对其迁移性影响不大。We studied the adsorption of phosphate（P） on nanoparticles titanium dioxides（n TiO2）. In particular,we investigated the effects of P, different concentration of humic acid（HA）, and pH on the aggregation of n TiO2 to clarify the interactions between HA and P on the transport of n TiO2 in quartz sand columns. Experimental results show that the adsorption capacity of n TiO2 to P is stronger at pH=6.0 than that at pH=8.0, which indicates that the low pH promotes the aggregation of nanoparticles. The presence of HA inhibits the deposition of n TiO2 resulting in the high transportability in P solution. Moreover, the increase of HA has negligible effect on the transport of n TiO2 in the presence of P.

关 键 词：纳米TIO2 团聚 迁移 腐殖酸 磷酸盐 

分 类 号：X522[环境科学与工程—环境工程]