[Removal effect of organics in Yangtze River raw water by MIEX resin pretreatment].
Jar-tests were used to study the removal effect of organics by MIEX pre-treatment from Yangtze River raw water, in which molecular weight, fractionation, UV scan, disinfection by-products, DOC and UV254 were used to estimate the removal effect. The results showed that organics in raw water were mainly composed of low-molecular weight and hydrophilic fraction, which accounted for above 50% of total organics. Above 35% DOC was removed by MIEX pretreatment with a dosage of 10 mL/L and contact time of 15 min, which due to the removal of low molecular weight and hydrophilic organics. The results of UV scan showed that organics which had high adsorption between 190 nm and 250 nm were significantly removed by MIEX pretreatment, while the part that had high adsorption on wavelength above 250 nm could be removed similar to coagulation alone.
Liu
Cheng
C
Key Laboratory of Integrated Regulation and Resource Development Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China. liucheng8791@sina.com
Chen
Wei
W
Li
Lei
L
Sheng
Yu
Y
D000327:Adsorption; D002244:Carbon / Q000302:isolation & purification; D002681:China; D007475:Ion Exchange Resins / Q000737:chemistry*; D008280:Magnetics; D009930:Organic Chemicals / Q000032:analysis / Q000302:isolation & purification*; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods; D014881:Water Supply / Q000032:analysis*
D007475:Ion Exchange Resins; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; D002244:Carbon