KMnO_4预氧化强化混凝工艺处理黑臭水的试验研究
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摘要
研究了KMnO_4预氧化与混凝工艺组合去除黑臭水COD_(Cr)、UV_(254)和浊度效果,分析多种混凝剂混凝处理黑臭水的絮凝性能,并对比分析投加KMnO_4前后的去除效果。结果表明:聚硅酸铁镁混凝剂对黑臭水浊度的去除效果优于聚合氯化铝和氯化铁混凝剂;SEM表征结果发现,聚硅酸铁镁呈紧簇团聚树枝状,能增强混凝过程中的吸附架桥和网捕等功能。KMnO_4预氧化能强化聚硅酸铁镁混凝剂去除有机污染物,在水样p H为8.0,KMnO_4投加浓度为25 mgL,预氧化时间为25 min时,COD_(Cr)去除率最高,可达81.76%,比单一混凝工艺提高了12.15个百分点;UV_(254)去除率最高可达49.44%,较单一混凝工艺提高了11.71个百分点;投加KMnO_4前后,浊度去除率均在90%以上。
The removal effect of organic pollutants in black and odorous water by KMn O_4pre-oxidation combined with conventional coagulating sedimentation treatment processes was studied.The flocculation performance of various coagulant flocculation treatment was analyzed,and the removal effects of COD_(C r),UV_(254)and turbidity before and after adding potassium permanganate compared and analyzed.The test results showed that KMnO_4pre-oxidation technology could strengthen the poly ferric magnesium silicate(PFMS)coagulating sedimentation process to remove organic pollutants.In the entire dosage range of the coagulation test,the PFMS coagulant had a great effect on the black and odorous water turbidity.The removal rate of turbidity was much higher than that of poly aluminum chloride and ferric chloride coagulants.The results of SEM characterization showed that the PFMS was aggregated in a tree-like shape,which could enhance the functions of adsorption bridging and net replenishment in the coagulation process.When the pH of raw water was 8,the dosage of KMnO_4was 25 mgL,and the pre-oxidation time was 25 minutes,the highest COD_(Cr)removal rate of 81.76%could be reached,which was 12.15 percent higher than the single coagulating sedimentation process,while the highest UV_(254)removal rate was 49.44%,increased by 11.71 percent compared with the single coagulating sedimentation.The turbidity removal rate of black and odorous water before and after adding KMnO_4was both above 90%.
The removal effect of organic pollutants in black and odorous water by KMn O_4pre-oxidation combined with conventional coagulating sedimentation treatment processes was studied.The flocculation performance of various coagulant flocculation treatment was analyzed,and the removal effects of COD_(C r),UV_(254)and turbidity before and after adding potassium permanganate compared and analyzed.The test results showed that KMnO_4pre-oxidation technology could strengthen the poly ferric magnesium silicate(PFMS)coagulating sedimentation process to remove organic pollutants.In the entire dosage range of the coagulation test,the PFMS coagulant had a great effect on the black and odorous water turbidity.The removal rate of turbidity was much higher than that of poly aluminum chloride and ferric chloride coagulants.The results of SEM characterization showed that the PFMS was aggregated in a tree-like shape,which could enhance the functions of adsorption bridging and net replenishment in the coagulation process.When the pH of raw water was 8,the dosage of KMnO_4was 25 mgL,and the pre-oxidation time was 25 minutes,the highest COD_(Cr)removal rate of 81.76%could be reached,which was 12.15 percent higher than the single coagulating sedimentation process,while the highest UV_(254)removal rate was 49.44%,increased by 11.71 percent compared with the single coagulating sedimentation.The turbidity removal rate of black and odorous water before and after adding KMnO_4was both above 90%.
引文
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[19]刘锐平,杨艳玲,李圭白,等.腐殖酸在水合二氧化锰表面的吸附行为[J].环境科学学报,2005,25(3):351-355.LIU R P,YANG Y L,LI G B,et al. Adsorptive behavior of humic acid on hydrous manganese dioxide[J]. Journal of Environmental Science,2005,25(3):351-355.
[20]梁恒,李星,李圭白,等.高锰酸钾和氯联合预氧化强化地表水处理[J].中国给水排水,2006,22(增刊1):279-283.LIANG H,LI X,LI G B,et al. Combined preoxidation by potassium permanganate and chlorine in enhancing the treatment of surface water[J]. China Water&Wastewater,2006,22(Suppl1):279-283.
[21]杨威,杨艳玲,陈杰,等.水合二氧化锰混凝去除原水中的浊度物质[J].化学与粘合,2006(6):416-418.YANG W,YANG Y L,CHEN J,et al. Turbid substances removal in raw water by hydrated manganese dioxide[J]. Chemicals and Adhesion,2006(6):416-418.
[22] OWEN D M,AMY G L,CHOWDHURY Z K,et al. NOM:characterization and treatability:natural organic matter[J].Journal American Water Works Association,1995,87:46-63.
[2]王旭,王永刚,孙长虹,等.城市黑臭水体形成机理与评价方法研究进展[J].应用生态学报,2016,27(4):1331-1340.WANG X,WANG Y G,SUN C H,et al. Formation mechanism and assessment method for urban black and odorous water body[J]. Chinese Journal of Applied Ecology,2016,27(4):1331-1340.
[3]李亮,武成辉,陈涛,等.过氧化钙在城镇黑臭水体修复中的作用[J].化工进展,2016,35(11):340-346.LI L,WU C H,CHEN T,et al. Effect of calcium peroxide on the restoration of black and odorous water in towns[J]. Chemical Industry and Engineering Progress,2016,35(11):340-346.
[4]于玉彬,黄勇.城市河流黑臭原因及机理的研究进展[J].环境科技,2010,23(增刊2):111-114.YU Y B,HUANG Y. Review of reason and mechanism of black and stink in urban rivers[J]. Environmental Science and Technology,2010,23(Suppl 2):111-114.
[5]李星,杨艳玲,刘锐平,等.高锰酸钾净水的氧化副产物研究[J].环境科学学报,2004,24(1):56-59.LI X,YANG Y L,LIU R P,et al. Reasearch on oxidation byproduct in water treatment using potassium permanganate[J].Journal of Environmental Science,2004,24(1):56-59.
[6] LI L,WEI D,WEI G,et al. Oxidation of cefazolin by potassium permanganate:transformation products and plausible pathways[J]. Chemosphere,2016,149:279-285.
[7]田家宇,陈伟雄,王威,等.高锰酸盐复合剂强化饮用水除污染生产性研究[J].环境工程学报,2007,1(7):42-46.TIAN J Y,CHEN W X,WANG W,et al. Full-scale study of enhanced treatment by PPC for drinking water production[J].Chinese Journal of Environmental Engineering,2007,1(7):42-46.
[8]岳兵,颜勇,谢美萍,等.高锰酸钾预氧化强化混凝工艺对高藻水的处理[J].净水技术,2013,32(2):16-19.YUE B,YAN Y,XIE M P,et al. Treatment of enhanced coagulation process of potassium permanganate pre-oxidation for raw water with high-algae[J]. Water Purification Technology,2013,32(2):16-19.
[9]苑宝玲,李坤林,钱强,等.高锰酸钾预氧化强化处理受污染的水库水[J].安全与环境工程,2005,12(3):42-45.YUAN B L,LI K L,QIAN Q,et al. The effectiveness of permanaganate pre-oxidation enhancing reservoir source water treatment[J]. Safety and Environmental Engineering,2005,12(3):42-45.
[10]李暮,孙贤波,刘勇弟,等.印染废水生化出水高锰酸钾强化混凝深度处理溶解性有机物的去除特性[J].环境化学,2012,31(12):1878-1885.LI M,SUN X B,LIU Y D,et al. Removal characteristic of dissolved organic matters in bio-treated effluents of dyeing and textile wastewater by potassium permanganate enhanced coagulation[J]. Environmental Chemistry,2012,31(12):1878-1885.
[11]陈禹志,预氧化强化混凝-膜除藻工艺膜污染控制研究[J].膜科学与技术,2016,36(1):104-108.
[12]马健,高俊敏,高旭,等.强化混凝-氧化处理含溴氰菊酯农药水库水[J].环境工程学报,2015,9(6):2777-2782.MA J,GAO J M,GAO X,et al. Enhanced coagulation-oxidation treatment of reservoir water containing deltamethrin pesticides[J]. Chinese Journal of Environmental Engineering,2015,9(6):2777-2782.
[13] ZHANG Z G,LIU D,QIAN Y,et al. Drinking water treatment using a submerged internal-circulation membrane coagulation reactor coupled with permanganate oxidation[J]. Journal of Environmental Sciences,2017,56(6):153-163.
[14] TIAN J Y,ERNST M,CUI F,et al. KMnO4pre-oxidation combined with Fe Cl3,coagulation for UF membrane fouling control[J]. Desalination,2013,320(11):40-48.
[15] WANG L,QIAO J L,HU Y H,et al. Pre-oxidation with KMnO4change sextra-cellular organic matter's secretion characteristics to improve algal removal by coagulation with a low dosage of polyaluminium chloride[J]. Journal of Environmental Sciences,2013,25(3):452-459.
[16]姚淑华,石中亮,宋守志,等.预氧化-混凝沉淀法处理制浆造纸废水的研究[J].环境工程学报,2003,4(11):75-78.YAO S H,SHI Z L,SONG S Z,et al. Study on treatment of papermaking waste water using pre-oxidation-coagulating sedimentation method[J]. Chinese Journal of Environmental Engineering,2003,4(11):75-78.
[17]胡劲召,占达东,王玉杰,等.高锰酸钾预氧化-混凝沉淀组合工艺处理微污染水研究[J].生态环境学报,2011,20(3):511-514.HU J Z,ZHAN D D,WANG Y J,et al. Combination process of KMnO4pre-oxidation-coagulative precipitation in slightly polluted water treatment[J]. Ecology and Environmental Sciences,2011,20(3):511-514.
[18] LIU R,SUN L,RAN J,et al. Treatment of low-turbidity source water by permanganate pre-oxidation:insitu,formed hydrous manganese dioxide as filter aid[J]. Separation&Purification Technology,2013,117(1):69-74.
[19]刘锐平,杨艳玲,李圭白,等.腐殖酸在水合二氧化锰表面的吸附行为[J].环境科学学报,2005,25(3):351-355.LIU R P,YANG Y L,LI G B,et al. Adsorptive behavior of humic acid on hydrous manganese dioxide[J]. Journal of Environmental Science,2005,25(3):351-355.
[20]梁恒,李星,李圭白,等.高锰酸钾和氯联合预氧化强化地表水处理[J].中国给水排水,2006,22(增刊1):279-283.LIANG H,LI X,LI G B,et al. Combined preoxidation by potassium permanganate and chlorine in enhancing the treatment of surface water[J]. China Water&Wastewater,2006,22(Suppl1):279-283.
[21]杨威,杨艳玲,陈杰,等.水合二氧化锰混凝去除原水中的浊度物质[J].化学与粘合,2006(6):416-418.YANG W,YANG Y L,CHEN J,et al. Turbid substances removal in raw water by hydrated manganese dioxide[J]. Chemicals and Adhesion,2006(6):416-418.
[22] OWEN D M,AMY G L,CHOWDHURY Z K,et al. NOM:characterization and treatability:natural organic matter[J].Journal American Water Works Association,1995,87:46-63.
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