疏水改性高分子絮凝剂的制备及其煤化工含油废水应用研究
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摘要
针对煤化工废水成分复杂、油水乳化稳定性强等特点,采用水溶液聚合法,以丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)、甲基丙烯酸甲酯(MMA)为原料,合成了一种含亲、疏水基团的新型阳离子高分子絮凝剂P(AM-DMD-MMA)。红外光谱表征表明,AM、DMDAAC、MMA三种单体均参与了聚合反应。结果表明,所合成絮凝应用于典型煤化工废水(首钢国际曹妃甸焦化厂调节池出水)处理的最适絮凝条件为:P(AM-DMD-MMA)投药量10 mg/L,聚合氯化铝投药量150 mg/L,pH=8,最高除油率为72. 6%,对应的UV254去除率为41. 2%。实验证明,该新型絮凝剂的除油效果优于目前常用的市售高分子絮凝剂,处理后的水质满足了后续生化处理的要求。
A novel cationic polymeric flocculant containing hydrophobic group,acrylamide-co-dimethylduallylammonium chloride-co-methyl methacrylate(P(AM-DMDAAC-MMA)) was synthesized by aqueous solution polymerization and used in the treatment of coking wastewater which has complex composition and strong oil-water emulsion stability. The FTIR spectrum of P(AM-DMD-MMA) confirmed acrylamide(AM),dimethyldiallylammonium chloride(DMDAAC) and methylmethacrylate(MMA) participated in the polymerization. In the present of the as-prepared floccurant for treatment of the typical coking wastewater(effluent of SHOU GANG International CAOFEIDIAN Coking Plant),the maximum removal rate of oil and the corresponding UV254 were 72. 6% and 41. 2%,respectively,under the conditions as follow: the dosage of P(AM-DMD-MMA) of 10 mg/L,dosage of PAC of 150 mg/L,and pH value of 8. Moreover,the as-prepared flocculant exhibited better performance than most of the commercial polymeric flocculants,and the quality of the treated water could meet the requirements of the subsequent biochemical treatment.
A novel cationic polymeric flocculant containing hydrophobic group,acrylamide-co-dimethylduallylammonium chloride-co-methyl methacrylate(P(AM-DMDAAC-MMA)) was synthesized by aqueous solution polymerization and used in the treatment of coking wastewater which has complex composition and strong oil-water emulsion stability. The FTIR spectrum of P(AM-DMD-MMA) confirmed acrylamide(AM),dimethyldiallylammonium chloride(DMDAAC) and methylmethacrylate(MMA) participated in the polymerization. In the present of the as-prepared floccurant for treatment of the typical coking wastewater(effluent of SHOU GANG International CAOFEIDIAN Coking Plant),the maximum removal rate of oil and the corresponding UV254 were 72. 6% and 41. 2%,respectively,under the conditions as follow: the dosage of P(AM-DMD-MMA) of 10 mg/L,dosage of PAC of 150 mg/L,and pH value of 8. Moreover,the as-prepared flocculant exhibited better performance than most of the commercial polymeric flocculants,and the quality of the treated water could meet the requirements of the subsequent biochemical treatment.
引文
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[2]徐振刚,孙晋东.中煤集团煤化工污水处理思考与实践[J].煤炭加工与综合利用,2014,8:28-32.
[3]李丹阳.基于氮气气浮除油与改善煤化工废水生化处理效能研究[D].哈尔滨:哈尔滨工业大学,2013.
[4] Hill A,Candau F,Selb J. Properties of hydrophobically associating polyacrylamides:influence of the method of synthesis[J]. Macromolecules,1993,26(17):4521-4532.
[5] Whipple W L,Maltesh C,Johnson C C,et al. Structurallymodified polymer flocculants:US,621529[P]. 2003-08-12.
[6]赵娜娜,佟瑞利,邹立壮,等.疏水改性高分子絮凝剂的合成及其对含油污水的净化[J].环境化学,2008,27(4):454-457.
[7] Hubbe M A,S M M,Lee S Y. Effects of charge ratios and cationic polymer nature on polyelectrolyte complex deposition onto cellulose[J]. Industrial&Engineering Chemistry Research,2005,44(9):3068-3074.
[8]王正熙.聚合物红外光谱分析和鉴定[M].成都:四川大学出版社,1989.
[9]刘娟,武耀锋,张晓慷.水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理[J].环境工程学报,2015,9(1):119-124.
[10]刘宏.化学破乳特性与高分子聚合物破乳[J].工业水处理,2000,20(9):22-24.
[11] RíOs G,Pazos C,Coca J. Destabilization of cutting oil emulsions using inorganic salts as coagulants[J]. Colloids&Surfaces A Physicochemical&Engineering Aspects,1998,138(2):383-389.
[12]岳钦艳,赵华章,高宝玉.有机高分子絮凝剂P(DMDAAC-VTMS)和P(DMDAAC-AM-VTMS)的合成及絮凝性能研究[J].工业水处理,2001,21(3):16-20.
[13] Pinotti A,Bevilacqua A,Zaritzky N. Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems[J]. Journal of Surfactants&Detergents,2001,4(1):57-63.
[14] Zhao X,Yang T,Liu L,et al. Effect of aluminum speciation on silica removal during coagulation of heavy-oil wastewater using polyaluminum chloride[J]. Desalination&Water Treatment,2016,57(25):11789-11799.
[15] Liu S,Wang Q H,Shi Y,et al. Coagulation micro-bubble flotation technology on oil contained coke wastewater treatment[J]. Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology,2012,44(SUPPL. 2):25-30.