摘要
采用温和的离子交联法制得半胱氨酸(Cy)改性壳聚糖(CS)溶胶絮凝剂(Cy-CS)。研究了Cy含量、Cy-CS投加量、pH、絮凝剂状态对絮凝除Cu^(2+)性能的影响。结果表明,改性后Cy-CS溶胶的絮凝性能较Cy溶液、纯CS溶胶显著提升;优化的絮凝pH为4.0～5.5,当Cy的质量为1.85 g,Cy-CS絮凝剂投加量6.5 mL时,去除率最高为98.63%;溶胶态Cy-CS絮凝除Cu^(2+)性能优于水溶液态Cy-CS。可为其它CS基絮凝剂的制备提供新的思路。
Cysteine-modified chitosan sol flocculant(Cy-Cs) was prepared by mild ion crosslinking method. The effect of cysteine content, Cy-Cs dosage,pH and state of flocculant on the performance of flocculation for Cu2+removal was studied. The results showed that, the flocculation performance of Cy-Cs sol after modification was significantly improved compared with that of cysteine solution and pure chitosan sol;The optimum flocculation pH was4.0~5.5, and the removal rate was 98.63% when the cysteine mass was 1.85 g and the Cy-Cs dosage was 6.5 m L;The performance of Cy-Cs for flocculation and removal of Cu2+in sol state was better than that in aqueous state. It provided a new idea for the preparation of other chitosan-based flocculants.
作者
李涛
刘珊
赵春鹏
张悦
冯婷
刘丹荣
LI Tao;LIU Shan;ZHAO Chunpeng;ZHANG Yue;FENG Ting;LIU Danrong(School of Environmental Science and Engineering,Chang'an University,Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid region,Ministry of Education:Xi'an 710054,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第3期89-92,共4页
Technology of Water Treatment
基金
国家自然科学基金面上项目(51778057)
