[Effect of chlorine on PAC's ability to adsorb microcystin].
Bottle-point experiments were conducted in Huangpu river raw water to examine the extent to which chlorine influenced the ability of powdered activated carbon (PAC) to adsorb two kinds of microcystins (MC-RR and MC-LR). The result shows that,when adding PAC and chlorine at the same point, chlorine can enhance the removal effect of the combined process (about 20%), which may be because the surface of PAC catalyzes the reaction between mirocystin and chlorine molecule, when adding PAC and chlorine at different points, the strengthening effect disappear [chlorine reduces the ability of PAC to microcystins to some extent (5%-10%)], the effect of chlorine to PAC becomes weak when raise the dosage of PAC. PAC can effectively remove microcystins (the removal effect can reach 55% and 45% for MC-RR and MC-LR respectively at the dosage of 10 mg/L, contact time of 6 hours) when using PAC alone.
Liu
Cheng
C
State Key Laboratory of Collution Control and Source Reuse, Tongji University, Shanghai 200092, China. liucheng8791@sina.com
Gao
Nai-yun
NY
Dong
Bing-zhi
BZ
Liu
Sui-qing
SQ
Zhao
Jian-fu
JF
D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D002713:Chlorine / Q000737:chemistry*; D008387:Marine Toxins; D052998:Microcystins / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
D008387:Marine Toxins; D052998:Microcystins; D014874:Water Pollutants, Chemical; D002606:Charcoal; D002713:Chlorine; C063855:microcystin RR; C057862:cyanoginosin LR