摘要
目的研究混凝—Fenton法对印染废水色度和COD的处理效果,解决印染废水的色度与有机物难于处理的问题.并分析水样中H2O2浓度、FeSO4.7H2O浓度等因素对处理效果的影响.方法通过混凝试验对水样进行预处理,在此基础上通过改变水样中H2O2浓度、FeSO4.7H2O浓度、pH值、温度、反应时间等因素得出Fenton氧化印染废水的最佳操作条件.结果预处理选择的混凝药剂为FeSO4.7H2O,助凝药剂为聚丙烯酰胺,其最佳投药量分别为1.4(g.L-1)和0.012(g.L-1).后续处理中,水样中H2O2浓度为2(mL.L-1)、FeSO4.7H2O浓度为250(mg.L-1)、pH值为3、反应时间20 min、反应温度20℃时为Fenton氧化反应的最佳操作条件,氧化处理后的出水的色度和COD分别降低了97.14%和90.52%.结论混凝—Fenton法对印染废水的色度和COD能够进行有效的去除,处理后水质达到了国家排放标准,并且操作简单.
The treating effect of coagulation-Fenton process on COD and decolorization was studied in order to solve the difficult problem of removing color and COD from the printing and dyeing wastewater. Since the pollution problem could not be solved effectively, the removal effectiveness of printing and dyeing wastewater by coagulation-Fenton process had been studied as well. In pretreatment, the optimal coagulant reagent and coagulant aids were determined, which were FeSO4·7H2O and PAM. The concentration of reagents was also confirmed, which was1. 4 （g·L^-1 ） and 0. 012 （g·L^-1 ） respectively. Then the effecting factors such as H2O2, FeSO4·7H2O, pH value, temperature, reaction time in Fenton oxidation process were discussed. Through the experiment, the best operation condition was determined, in which the dosage of H2O2 and Fe^2＋ was 2（mL·L^-1） and 0.25（g·L^-1）, pH value was 3, temperature was 20℃; and reaction time was 20 min. Under such operation condition, the removal rates of color and COD were 97.14 % and 90.52 % respectively. The results showed that it was feasible to treat printing and dyeing wastewater by coagulation Fenton process. The quality of the treated water reached the national standard, and the process of the operation was simple.
出处
《沈阳建筑大学学报（自然科学版）》
EI
CAS
2006年第1期137-140,共4页
Journal of Shenyang Jianzhu University：Natural Science
基金
建设部科技攻关项目(03-02-068)
关键词
混凝
FENTON试剂
氧化
印染废水
coagulation, Fenton reagent, oxidation, printing and dyeing wastewater
