芬顿试剂氧化-PAC吸附工艺处理电厂排污水
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摘要
开发了芬顿试剂预氧化-粉末活性炭(PAC)吸附组合工艺处理电厂循环冷却排污水。首先分别研究了芬顿试剂氧化法和粉末活性炭吸附法对有机物的去除效果,发现2种工艺在最佳处理条件时仍存在处理效果较差、药剂费用高等问题。因此,开发了芬顿试剂预氧化-PAC吸附组合工艺,研究了该工艺的影响因素,并进行小试实验。结果表明,该组合工艺在不改变原水的初始pH、H_2O_2与Fe~(2+)的摩尔比为1以及H_2O_2的投加浓度为25 mg·L~(-1)时得到最佳的预处理条件。在最佳预氧化条件下投加0.15 g·L~(-1)的PAC进行了4级逆流吸附小试实验,结果表明:该工艺处理效果稳定、药剂费用低,出水满足排放要求。
Fenton's reagent preoxidation-powdered activated carbon(PAC) adsorption combined process for treatment of a recirculating cooling drainage from a power plants was developed.First,the Fenton's reagent oxidation and PAC adsorption methods for organics removal were studied respectively.It was found that the two processes still had some problems such as poor in treatment effect and high in chemicals cost.Therefore,the Fenton's reagent preoxidation-PAC adsorption combined process was studied,and the influence factors of this process were tested.The results showed that the best efficiency was achieved when pH value of raw water was unchanged,the molar ratio of H_2O_2 to Fe~(2+) was 1 and the H_2O_2 concentration was 25 mg·L~(-1).Under the optimum condition with PAC dosage of 0.15 g·L~(-1),the results obtained from four-stage countercurrent adsorption process showed that it was stable and the removal effect was good.In addition,the process was low in operation cost and the effluent quality could meet the discharge standards.
Fenton's reagent preoxidation-powdered activated carbon(PAC) adsorption combined process for treatment of a recirculating cooling drainage from a power plants was developed.First,the Fenton's reagent oxidation and PAC adsorption methods for organics removal were studied respectively.It was found that the two processes still had some problems such as poor in treatment effect and high in chemicals cost.Therefore,the Fenton's reagent preoxidation-PAC adsorption combined process was studied,and the influence factors of this process were tested.The results showed that the best efficiency was achieved when pH value of raw water was unchanged,the molar ratio of H_2O_2 to Fe~(2+) was 1 and the H_2O_2 concentration was 25 mg·L~(-1).Under the optimum condition with PAC dosage of 0.15 g·L~(-1),the results obtained from four-stage countercurrent adsorption process showed that it was stable and the removal effect was good.In addition,the process was low in operation cost and the effluent quality could meet the discharge standards.
引文
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[20]WEI X Z,GU P,ZHANG G H.Reverse osmosis concentrate treatment by a PAC countercurrent four-stage adsorption/MF hybrid process[J].Desalination,2014,352(3):18-26
[21]刘成,黄廷林,赵建伟.混凝、粉末活性炭吸附对不同分子量有机物的去除[J].净水技术,2006,25(1):31-33
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[23]张定定,马冬梅,汤志涛,等.印染废水深度处理过程中有机污染物分子量的分布变化[J].环境化学,2014,33(7):1222-1228
[24]梅特卡夫和埃迪公司,乔巴诺格劳斯,伯顿,等.废水工程:处理及回用[M].北京:化学工业出版社,2004:826-827
[2]王国栋.循环冷却水排污水的处理[C]∥中国土木工程学会全国排水委员会.中国土木工程学会全国排水委员会2015年年会论文集.杭州,2015:299-302
[3]杨伟,刘芳,高雅,等.循环水排污水中残余阻垢剂对反渗透膜性能的影响[J].化工进展,2015,34(2):565-570
[4]易斌,杨春平,郭俊元,等.活性炭吸附-Fenton氧化处理高盐有机废水[J].环境工程学报,2013,7(3):903-907
[5]叶少帆,吴志超,王志伟,等.Fenton氧化-活性炭吸附协同深度处理垃圾渗滤液的研究[J].环境工程学报,2010,4(6):1363-1367
[6]ZHU X B,TIAN J P,LIU R,et al.Optimization of Fenton and electro-Fenton oxidation of biologically treated coking wastewater using response surface methodology[J].Separation and Purification Technology,2011,81(3):444-450
[7]BLANCO J,TORRADES F,VARGA M,et al.Fenton and biological-Fenton coupled processes for textile wastewater treatment and reuse[J].Desalination,2011,286(1):394-399
[8]BIANCO B,MICHELIS I D,VEGLIO F.Fenton treatment of complex industrial wastewater:Optimization of process conditions by surface response method[J].Journal of Hazardous Materials,2011,186(2/3):1733-1738
[9]CHEN S,SUN D Z,CHUNG J S.Treatment of pesticide wastewater by moving-bed biofilm reactor combined with Fenton-coagulation pretreatment[J].Journal of Hazardous Materials,2007,144(1/2):577-584
[10]涂响,魏健,李斌,等.Fenton氧化和絮凝作用对干法腈纶聚合废水中有机物的去除[J].环境工程技术学报,2014,4(1):53-59
[11]MOCHIZUKI T,KUBOTA M,MATSUDA H,et al.Adsorption behaviors of ammonia and hydrogen sulfide on activated carbon prepared from petroleum coke by KOH chemical activation[J].Fuel Processing Technology,2016,144:164-169
[12]胡佳欣.芬顿-活性炭吸附深度处理褐煤提质废水技术研究[D].长春:吉林大学,2016
[13]VARGAS A M M,CAZETTA A L,KUNITA M H,et al.Adsorption of methylene blue on activated carbon produced from flamboyant pods(Delonix regia):Study of adsorption isotherms and kinetic models[J].Chemical Engineering Journal,2011,168(2):722-730
[14]WANG L W,TAMAINOT-TELTO Z,THORPE R,et al.Study of thermal conductivity,permeability,and adsorption performance of consolidated composite activated carbon adsorbent for refrigeration[J].Renewable Energy,2011,36(8):2062-2066
[15]ZHANG S,SHAO T,KARANFIL T.The effects of dissolved natural organic matter on the adsorption of synthetic organic chemicals by activated carbons and carbon nanotubes[J].Water Research,2011,45(3):1378-1386
[16]ZHANG Y.Rapid adsorption and degradation of nitrophenol solution with activated carbon and Fenton’s reagent[J].Chinese Journal of Environmental Engineering,2012,6(3):787-792
[17]杨鹏,张伟军,刘园园,等.活性炭吸附和两级Fenton氧化组合工艺处理高盐对氨基苯酚生产废水[J].环境工程学报,2015,9(5):2232-2236
[18]国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002:211-213
[19]李竞,顾平,张光辉.PAC四级逆流吸附/微滤组合工艺处理二级出水[J].中国给水排水,2016,32(19):76-79
[20]WEI X Z,GU P,ZHANG G H.Reverse osmosis concentrate treatment by a PAC countercurrent four-stage adsorption/MF hybrid process[J].Desalination,2014,352(3):18-26
[21]刘成,黄廷林,赵建伟.混凝、粉末活性炭吸附对不同分子量有机物的去除[J].净水技术,2006,25(1):31-33
[22]XIA C,LI J G,FANG G.Fenton oxidation of different molecular weights polyethylene glycols in wastewater[J].Advanced Materials Research,2014,3514(1033):382-386
[23]张定定,马冬梅,汤志涛,等.印染废水深度处理过程中有机污染物分子量的分布变化[J].环境化学,2014,33(7):1222-1228
[24]梅特卡夫和埃迪公司,乔巴诺格劳斯,伯顿,等.废水工程:处理及回用[M].北京:化学工业出版社,2004:826-827