CAJ | 학술논문

以生活污水为处理对象，通过对沸石、酸改性沸石、聚合氯化铝（ PAC）改性后的沸石、沸石负载接枝改性壳聚糖复合净水剂进行COD去除对比试验.实验结果表明：沸石负载改性壳聚糖复合净水剂对COD有较高的去除率，对于COD浓度为400 mg·L-1的污水，在温度为25℃的条件下，经2 h搅拌接触， COD浓度可降至78 mg·L-1，去除率可达81%. SEM结果表明：壳聚糖部分包覆在沸石上，沸石负载接枝改性壳聚糖复合净水剂对COD的去除机理是复合净水剂表面（及内部孔隙）吸附作用和离子交换作用.对于普通自来水厂，只需将快滤池中常用的石英砂部分替换成沸石负载接枝改性壳聚糖复合净水剂即可有效去除水中的COD.
이생활오수위처리대상，통과대비석、산개성비석、취합록화려（ PAC）개성후적비석、비석부재접지개성각취당복합정수제진행COD거제대비시험.실험결과표명：비석부재개성각취당복합정수제대COD유교고적거제솔，대우COD농도위400 mg·L-1적오수，재온도위25℃적조건하，경2 h교반접촉， COD농도가강지78 mg·L-1，거제솔가체81%. SEM결과표명：각취당부분포복재비석상，비석부재접지개성각취당복합정수제대COD적거제궤리시복합정수제표면（급내부공극）흡부작용화리자교환작용.대우보통자래수엄，지수장쾌려지중상용적석영사부분체환성비석부재접지개성각취당복합정수제즉가유효거제수중적COD.
High concentration of COD in waste water is extremely harmful to human health. How to remove COD ef-ficiently and at low-cost in tap water has been a tough problem for numerous water plants. In this study,experiments were conducted using waste water to investigate the effect upon the COD removal test by Permutite modification with acid and PAC、graft modification Chitosan Supported by Permutite. The results show that graft modification Chitosan Supported by Permutite has better removal efficiency. Under the condition of temperature of 25 ℃,contact time for 2 h,the COD concentration in source water is decreased from 400 mg·L-1 to 78 mg·L-1 ,while the removal rate comes up to 81%. SEM indicated that CTS partially loaded on permutite. Loading number increased with m( CTS)/m( permut ite). The mechanism of removing COD by modified permutite is permutite surface( and internal pore)ad-sorption and ion exchange. Using modified permutite partially to replace the common quartz sand in fast filer is only needed for ordinary water plants to remove COD effectively in water.