硅酸钙-壳聚糖聚合物制备及其对重金属废水的吸附特性  

Preparation of calcium silicate-chitosan polymer and the adsorptive removal of heavy metals in wastewater

作　　者：吴亚琪[1] 徐畅[2] 赵越[1] 严群[1] 

机构地区：[1]江南大学环境与土木工程学院,无锡214122 [2]靖江市环境监测站,泰州224500

出　　处：《环境化学》2016年第3期562-567,共6页Environmental Chemistry

基　　金：江苏省自然科学基金(BK2012558);国家自然科学基金(51508230);科技部水体污染控制与治理科技重大项目(2011ZX07301-002)资助~~

摘　　要：使用溶液共混法制备出硅酸钙-壳聚糖聚合物,同时采用FT-IR、XRD等方法对制备的硅酸钙-壳聚糖聚合物进行表征,并分别对壳聚糖、硅酸钙、硅酸钙-壳聚糖聚合物吸附去除重金属废水的特性进行了初步研究.结果表明,硅酸钙-壳聚糖聚合物在制备过程中晶型发生变化,结晶度降低;硅酸钙-壳聚糖聚合物对各重金属离子的吸附能力最强,其对Ni^(2+)、Cu^(2+)、Pb^(2+)、Zn^(2+)、Cr^(3+)的最大吸附量分别为167.01、192.30、232.47、174.71、162.33 mg·g^(-1);重要的是,硅酸钙-壳聚糖聚合物可在酸性环境下更有效吸附去除废水中重金属离子.A solution blending method was adopted to prepare calcium silicate-chitosan polymer in this study,and FT-IR and XRD were used to characterize the polymer adsorbent. In addition,a preliminary study was carried on the adsorbent abilities of chitosan,calcium silicate and calcium silicate-chitosan polymer for heavy metal ions in wastewater. The characterization indicated that crystal structure of the polymer changed and crystallinity decreased during the synthesis process.Adsorbent ability of the polymer was the highest among the three adsorbents and the maximum adsorbent ability for Ni^（2＋）,Cu^（2＋）,Pb^（2＋）,Zn^（2＋）and Cr^（3＋）reached 167.01,192.30,232.47,174.71 and162.33 mg·g^（-1）,respectively. Moreover,it was noteworthy that calcium silicate-chitosan polymer showed a stronger acid resistance for removal of heavy metal ions in wastewater.

关 键 词：酸钙-壳聚糖聚合物 制备 重金属废水 吸附 去除. 

分 类 号：X703[环境科学与工程—环境工程]