ABS树脂废水胶乳浓度对破乳的影响

发布时间：2017-12-27 12:07

本文关键词：ABS树脂废水胶乳浓度对破乳的影响　出处：《化工学报》2016年11期 　论文类型：期刊论文

【摘要】：以ABS树脂接枝聚合工段废水为研究对象,聚合氯化铝(PAC)为破乳剂,考察了胶乳浓度对破乳效果的影响。结果表明,不同胶乳浓度下均存在优化的药剂投加量区间,投加量过小或过大均会造成破乳效果不佳。随着胶乳COD浓度由13012 mg·L~(-1)下降至192 mg·L~(-1),单位胶乳COD的优化药剂投加量由6.1~10.8 mg·g~(-1)增加至7.7~13.8 mg·g~(-1),区间向右移动,最佳COD去除率由99.30%下降至91.24%。稀释前后最优单位胶乳COD的药剂投加量提高了40%左右。PAC对ABS树脂废水胶乳的破乳机理以吸附-电性中和为主,随着PAC投加量的增加,胶粒Zeta电位逐渐升高,Zeta电位在-23~13 m V范围内,胶乳可有效破乳。
[Abstract]:The effect of latex concentration on the demulsification effect of ABS resin graft polymerization section wastewater was studied, and poly aluminum chloride (PAC) was used as demulsifier. The results show that the dosage range of the optimized agent exists under different latex concentration, and the low or too large dosage will result in poor demulsification. With the latex COD concentration decreasing from 13012 mg to L~ (-1) to 192 mg. L~ (-1), the optimal dosage of unit latex COD increased from 6.1~10.8 mg to g~ (6.1~10.8), and the mobile zone moved to the right, and the best removal rate decreased from 99.30% to 91.24%. The dosage of the best unit latex COD before and after dilution was increased by about 40%. The Demulsification Mechanism of PAC for ABS resin wastewater latex is mainly adsorption electric neutralization. With the increase of PAC dosage, the Zeta potential of colloidal particles increases gradually, and the Zeta potential is within the range of -23~13 m V, and latex can be effectively demulsified.
【作者单位】：中国矿业大学(北京)化学与环境工程学院;中国环境科学研究院水污染控制技术研究中心;中国环境科学研究院环境基准与风险评估国家重点实验室;北京师范大学水科学研究院;
【基金】：国家水体污染控制与治理科技重大专项资助项目(2012ZX07201-005)
【分类号】：X783.2
【正文快照】： 引言丙烯腈-苯乙烯-丁二烯聚合物(ABS)树脂生产主要采用乳液接枝本体SAN掺混工艺[1-3],生产过程产生大量有机废水[4],主要来自丁二烯聚合、乳液接枝和凝聚干燥3个工段[5-6]。ABS树脂废水含有大量胶乳[7]及有毒有害污染物[8],可生化性差[9],难于直接进行生物处理[10-12],必须先

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