摘要
用离子沉淀法回收对甲酚模拟废水中的酚,考察了不同的金属离子沉淀剂、沉淀剂加量、温度与pH值对酚去除率的影响.结果表明,最优的沉淀剂为BaCl2;对于 50 mL、5 000 mg/L的对甲酚模拟废水,当温度为 25℃,pH值为14,BaCl2 溶液加量为 18 mL,酚去除率可达 52.3%.将收集的酚钡盐沉淀用稀HCl中和,用乙酸丁酯为萃取剂进行萃取,对甲酚的萃取回收率达到 99.69%,为高含酚废水的资源化利用提供了思路和方法.
Abstract
P-cresol was recovered from simulated phenolic wastewater by precipitation.The effects of type of precipitants,precipitant dosage,temperature and pH value on P-cresol re-moval rate were investigated.The results showed that the best precipitant was barium chlo-ride and removal rate could reach 52.3%at 25℃and pH 14 when barium chloride dosage was 18 mL for 50 mL of 5 000 mg/L simulated phenolic wastewater.The precipitants were neutralized with dilute HCl and the free P-cresol was extracted with butyl acetate.The ex-traction efficiency reached 99.69%.The research provided ideas and methods for resource u-tilization of high concentration of phenolic wastewater.
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维普
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