壳聚糖在海水混凝处理过程中的助凝作用研究  

Aid Effect of Chitosan in the Treatment Process of Seawater Coagulation

作　　者：张秀芝[1] 张雨山[1] 王静[1] 寇希元[1] 郭鸿博[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《化学工业与工程》2010年第1期38-42,共5页Chemical Industry and Engineering

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(K-JBYWF-2007-T08);国家"十一五"重大攻关课题资助项目(2006BAB03A08)

摘　　要：将天然高分子絮凝剂壳聚糖(CTS)与无机絮凝剂FeCl3协同使用,混凝处理渤海湾近岸海水,考察了壳聚糖投加量、pH值和沉降时间对浊度和其它污染物去除效果的影响。试验结果表明,CTS对FeCl3助凝效果显著,与单独使用FeCl3相比,其浊度、化学耗氧量(CODMn)和总磷(TP)去除率分别提高了8.3%、9.6%和9.4%。FeCl3与CTS协同使用还可明显改善絮体的沉降性能,缩短沉淀时间。综合考虑各项主要技术指标,其海水混凝适宜条件为m(FeCl3)/m(CTS)=15.0。The natural polymer chitosan and ferric chloride were mixed to coagulate seawater from coastal Bohai Bay and the efficiency of chitosan coagulation aid was investigated. Impacts of chitosan dosage, pH and sedimentation time on pollutant and turbidity removal efficiency were studied. The results showed that chitosan could enhance the effect of flocculation significantly. Compared with the single use of ferric chloride, the mixed method can increase the turbidity, CODMn, and TP removal rates by 8.3% , 9. 6% and 9.4% , respectively. Ferric chloride together with the use of chitosan could also improve the floe sedimentation performance significantly and shorten the sedimentation time. Considering across-the-board the major technical indicators for coagulation in seawater treatment process, the dosage of 1 mg/L CTS and 15 mg/L FeCl3 （m （ FeCl3 ）/m （CTS） = 15.0） was optimum.

关 键 词：壳聚糖 三氯化铁 助凝 海水 

分 类 号：X55[环境科学与工程—环境工程]