一种新型壳聚糖包覆纳米铁制备与TCE降解效果试验  

Experimentsofpreparation and TCE degradation of a new type of chitosan coated nano-iron

作　　者：蒋小红 刘昊 JIANG Xiaohong;LIU Hao(ShanghaiJianke Environmental Technology Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]上海建科环境技术有限公司,上海200032

出　　处：《粘接》2023年第11期65-68,共4页Adhesion

摘　　要：针对普通纳米铁去除地下水三氯乙烯(TCE),易发生团聚,影响TCE去除效果的问题,提出一种新型壳聚糖包覆纳米铁的制备,并对其去除TCE的效果进行研究。结果表明,经过壳聚糖包覆后,纳米铁的氧化和团聚情况得到了明显的改善,分散性得到了有效提高。在包覆率为26.4%,纳米铁投加量与TCE比值为40∶1,初始pH值为6.8的条件下,壳聚糖包覆纳米铁对TCE的去除率约为90%,表现出良好的TCE去除效果。壳聚糖作为一种天然有机高分子材料,对TCE有一定的吸附作用,能促进纳米铁与TCE的接触。In view of the problem that common nano iron is easy to agglomerate when removing Trichloroethylene(TCE)from groundwater,a new type of chitosan coated nano iron preparationwas proposed,and the effect of chitosan coated nano iron on removing TCE was studied.The experimental results showed that after being coated with chitosan,the oxidation and aggregation of nano iron were significantly improved,and the dispersibility was effectively improved.Under the conditions of 26.4%coating rate,a ratio of 40:1 nano-iron dosage to TCE concentration,and an initial pH value of 6.8,the removal rate of TCE by chitosan coated nano-iron was about 90%,demonstrating a good TCE removal effect.As a natural organic polymer material,chitosan has a certain adsorption effect on TCE and can promote the contact between nano-iron and TCE.

关 键 词：地下水治理 三氯乙烯 包覆纳米铁 壳聚糖吸附 

分 类 号：TQ319[化学工程—高聚物工业]