摘要
以重质碳酸钙为原料,采用阳离子淀粉改性制备重质碳酸钙螯合吸附剂。通过单因素实验,并用正交实验优化探究影响因素对Cd^(2+)吸附效果的影响,用原子吸收分光光度计测定溶液中重金属Cd^(2+)的浓度。结果表明,重质碳酸钙螯合吸附剂对Cd^(2+)的最优吸附条件为pH=5.0、重质碳酸钙螯合吸附剂用量为25 g/L、吸附时间为3 h、温度为25℃,吸附率可达到99.94%。红外光谱表征表明,重质碳酸钙与阳离子淀粉存在化学吸附,改变了重质碳酸钙的表面性质,并且重质碳酸钙表面已被阳离子淀粉包覆。
With heavy calcium carbonate as raw material,heavy calcium carbonate chelate adsorbent was prepared by cationic starch modification.The adsorption effect of Cd2＋was explored through single factor and orthogonal optimization experiments.The concentration of heavy metal Cd2＋was measured by atomic absorption spectrophotometer.Results showed that the optimal adsorption conditions of heavy calcium carbonate chelate adsorbent to Cd2＋：p H=5.0,heavy calcium chelate adsorbent dosage was 25 g/L,adsorption time was 3 h,and temperature was 25 ℃.Under the optimal conditions,the adsorption rate reached99.94%.IR showed that chemical adsorption was between the heavy calcium carbonate and cationic starch,changed the surface properties of heavy calcium carbonate,and heavy calcium carbonate surface has been doped by cationic starch.
出处
《无机盐工业》
CAS
北大核心
2017年第4期33-36,共4页
Inorganic Chemicals Industry
基金
广西自然科学基金项目(2013GXNSFAA19321)
广西高校科学技术研究项目(YB2014380)
贺州学院科研项目(2015ZZZK10)
关键词
重质碳酸钙螯合吸附剂
阳离子淀粉
吸附
heavy calcium carbonate chelate adsorbent
cationic starch
absorption
