KMnO_4-PAC对喀斯特高原湖库DOM的去除
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摘要
以云贵高原2个喀斯特湖库-红枫湖和阿哈水库为调查对象,研究了以KMnO_4-聚合氯化铝(PAC)预氧化协同混凝工艺对溶解性有机质(DOM)的去除影响。结果表明,对红枫湖DOM的溶解性有机碳(DOC)去除率要高于阿哈水库,但是对UV_(254)的控制却呈相反的趋势;且随着PAC投加量的增加而升高,KMnO_4的适宜投加量,对红枫湖DOM的去除分别为0.1、0.2 mg/L,对阿哈水库DOM的去除为0.3 mg/L。傅立叶变换红外光谱仪指纹区的峰频增加,且波数3 300 cm~(-1)处的主峰强度减弱,表明预氧化可以破坏DOM长链的不饱和键,产生低分子量的有机物,PAC的吸附卷扫作用可能是提高DOM去除率的主要机理。KMnO_4-PAC相结合的工艺对高原喀斯特湖库DOM的控制有较好的去除效果,可为当地水厂的工艺技术升级提供一定的理论基础。
The influence of KMnO_4pre-oxidation combined with PAC coagulation on removal of DOM in two representative Karst plateau reservoirsHongfeng and Aha Lake were investigated.The results indicated that,the DOC removal rate for DOM in Hongfeng Lake was higher than Aha Lake,however,UV_(254)removal rate showed opposite trends.The dosage of PAC was dominant in DOM control,0.1 and 0.2 mg/L of KMnO_4were the optimum dosage for DOM removal in Hongfeng Lake,0.3 mg/L of KMnO_4was the optimum dosage for DOM removal in Aha Lake.FT IR results indicated that the increase of peak frequency in fingerprint zone and the decrease of main peak at 3 300 cm~(-1),which was mainly attributed to the cleavage of carbon bonds and low molecular weight organic matters were produced.The adsorption and wrap effect of PAC might be the dominant mechanism for DOM removal rate improvement.KMnO_4combined with PAC technique could provide relative high removal rate of DOM in karst plateau reservoirs and provide part of fundamental theories for DOM treatment of local drinking water treatment plants.
The influence of KMnO_4pre-oxidation combined with PAC coagulation on removal of DOM in two representative Karst plateau reservoirsHongfeng and Aha Lake were investigated.The results indicated that,the DOC removal rate for DOM in Hongfeng Lake was higher than Aha Lake,however,UV_(254)removal rate showed opposite trends.The dosage of PAC was dominant in DOM control,0.1 and 0.2 mg/L of KMnO_4were the optimum dosage for DOM removal in Hongfeng Lake,0.3 mg/L of KMnO_4was the optimum dosage for DOM removal in Aha Lake.FT IR results indicated that the increase of peak frequency in fingerprint zone and the decrease of main peak at 3 300 cm~(-1),which was mainly attributed to the cleavage of carbon bonds and low molecular weight organic matters were produced.The adsorption and wrap effect of PAC might be the dominant mechanism for DOM removal rate improvement.KMnO_4combined with PAC technique could provide relative high removal rate of DOM in karst plateau reservoirs and provide part of fundamental theories for DOM treatment of local drinking water treatment plants.
引文
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[24]MA J,LIU W.Effectiveness and mechanism of potassium ferrate(VI)preoxidation for algae removal by coagulation[J].Water Research,2002,36(4):871-878.
[25]李多,苗时雨,张怡然,等.高锰酸钾预氧化-强化混凝控制饮用水消毒副产物的研究[J].水处理技术,2014,40(2):26-30.
[26]MATILAINEN A,VEPS魧L魧INEN M,SILLANP魧魧M.Natural organic matter removal by coagulation during drinking water treatment:A review[J].Advances in Colloid and Interface Science,2010,159(2):189-197.
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[2]CHEN J J,YEH H H,TSENG I C.Effect of ozone and permanganate on algae coagulation removal-Pilot and bench scale tests[J].Chemosphere,2009,74(6):840-846.
[3]GAN W,SHARMA V K,ZHANG X,et al.Investigation of disinfection byproducts formation in ferrate(VI)pre-oxidation of NOM and its model compounds followed by chlorination[J].Journal of Hazardous Materials,2015,292:197-204.
[4]MA J,LIU W.Effectiveness and mechanism of potassium ferrate(VI)preoxidation for algae removal by coagulation[J].Water Research,2002,36(4):871-878.
[5]岳兰秀,吴丰昌,陈文龙.贵州百花湖水中溶解有机质的分子量分布随深度的变化规律[J].环境科学与管理,2008,33(5):66-70.
[6]古励,郭显强,丁昌龙,等.藻源型溶解性有机氮的产生及不同时期藻类有机物的特性[J].中国环境科学,2015,39(9):2745-2753.
[7]HAN L,XU B,QI F,et al.Effect of nitrogen/phosphorus concentration on algal organic matter generation of the diatom Nitzschia palea:Total indicators and spectroscopic characterization[J].Journal of Environmental Sciences,2016,47:130-142.
[8]ZHANG N,XU B,QI F.Effect of phosphate loading on the generation of extracellular organic matters of Microcystis Aeruginosa and Its derived disinfection by-products[J].Water,Air,&Soil Pollution,2016,227(8):264.
[9]刘鸿雁,王龙飞,罗梅,等.贵阳市阿哈水库农业面源污染调查与分析[J].贵州农业科学,2009,37(9):235-239.
[10]刘方,朱健,罗海波,等.贵州喀斯特山区旱作土壤-水系统中氮磷迁移的变化特征[J].中国水土保持,2013(6):47-50.
[11]张巧香,刘方,朱健,等.贵州中部喀斯特山区水稻田面水N、P浓度变化及污染评价[J].中国农学通报,2012,28(24):63-67.
[12]方志青,李存雄,张明时,等.百花湖、阿哈水库底泥及营养盐蓄积量的估算[J].贵州师范大学学报(自然科学版),2009,27(4):30-33.
[13]潘祖光,侯克钧.关于阿哈水库水质及污染情况的研究及对策[J].贵州工业大学学报(自然科学版),2007,25(4):60-63.
[14]陈作州.阿哈水库、红枫湖水库水华蓝藻的时空变化及毒性试验研究[D].贵阳:贵州师范大学,2007.
[15]黄国佳,李秋华,陈椽,等.贵州高原红枫湖水库浮游植物功能分组及其时空分布特征[J].生态学报,2015,35(17):5573-5584.
[16]晏妮.贵州两种类型喀斯特水库浮游植物分布与富营养化特征比较研究[D].贵阳:贵州师范大学,2006.
[17]李磊,李秋华,焦树林,等.阿哈水库浮游植物功能群时空分布特征及其影响因子分析[J].环境科学学报,2015,35(11):3604-3611.
[18]黎文,吴丰昌,傅平青,等.贵州红枫湖水体溶解有机质的剖面特征和季节变化[J].环境科学,2006,27(10):1979-1985.
[19]岳兰秀,吴丰昌,刘丛强,等.红枫湖和百花湖天然溶解有机质的分子荧光特征与分子量分布的关系[J].科学通报,2005,50(24):2774-2780.
[20]王立英,吴丰昌,张润宇,等.红枫湖溶解有机质不同有机组分的地球化学特征[C].中国矿物岩石地球化学学会第12届学术年会,2009:1.
[21]万国江,万恩源,陈敬安,等.深水人工湖环境生物地球化学过程研究:以贵州红枫湖-百花湖为例[J].地球与环境,2010,38(3):262-270.
[22]S魧RKK魧H,VEPS魧L魧INEN M,SILLANP魧魧M.Natural organic matter(NOM)removal by electrochemical methods-A review[J].Journal of Electroanalytical Chemistry,2015,755:100-108.
[23]NEBBIOSO A,PICCOLO A.Molecular characterization of dissolved organic matter(DOM):a critical review[J].Analytical and Bioanalytical Chemistry,2013,405(1):109-124.
[24]MA J,LIU W.Effectiveness and mechanism of potassium ferrate(VI)preoxidation for algae removal by coagulation[J].Water Research,2002,36(4):871-878.
[25]李多,苗时雨,张怡然,等.高锰酸钾预氧化-强化混凝控制饮用水消毒副产物的研究[J].水处理技术,2014,40(2):26-30.
[26]MATILAINEN A,VEPS魧L魧INEN M,SILLANP魧魧M.Natural organic matter removal by coagulation during drinking water treatment:A review[J].Advances in Colloid and Interface Science,2010,159(2):189-197.
[27]方晶云.蓝藻细胞及藻类有机物在氯化消毒中副产物的形成机理与控制[D].哈尔滨:哈尔滨工业大学,2010.