PDF《含锡、镍、 铜、锌离子废水的处理》

9 文献标识码: A 文章编号: 1008- 553X (2009 ) 05- 0057-

02 草甘膦生产废酸的循环利用 郝祥忠, 徐晓莉 (安徽氯碱化工集团, 安徽 合肥

230011 ) 收稿日期: 2009- 06-

14 作者简介: 郝祥忠 (1966-) , 男, 高级工程师, 毕业于华东化工学院, 目前主要从事化工产品的研发和设计工作, 13905519371, [email protected]. Treatment of Waste Water with Tin,Copper,Zinc WANG You-rong1 ,CAI Wen-ju2 , XU Yu-fu2 ,HU Xian-guo2 (1.Anhui Xinke NewMaterials Co., Ltd., Wuhu 241008, China;

2.School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China ) Abstract: In order to reclaim and make the heavy metal ions concentration come up to the waste water discharge standard , chemical coprecipitation method- ferrite was used to deal with metal ions such as tin, zinc, copper and nickel which are from deplating bath , and the process parameters of this method are discussed. The results indicate that tin and copper are eliminated step by step with the different pH values, the optimum pH values are

3 and

7 respectively, and the deposition amount to 97.0 and 99.9 percent, SnO2 and CuO are gained byhigh temperature calcining. The optimumprocess ofthe ferrite treating zinc and nickel is: pH value is 10,FeSO4・ 7H2O concentration is 0.24g/100mL,65℃ ,1.5% H2O2 1mL. In this condition,the concentration ofzinc ions decreased from100mg/Lto0.023mg/L, and nickel ions decreased from200mg/Lto0.11mg/L. Key words: treatment of waste water;

ferrite;

heavy metal ions 1.2 缩合反应 三氯化磷法缩合反应分三步进行, 第一步滴加三 氯化磷, 使其水解生成盐酸和亚磷酸, 见反应式②;

第二 步是生成的盐酸与亚氨基二乙酸的单钠盐反应生成亚 氨基二乙酸, 再使亚氨基二乙酸成盐, 稳定氨基, 便于下 步反应, 见反应式③;

第三步在酸性条件下, 加甲醛与生 成的亚磷酸和亚氨基二乙酸盐进行缩合反应, 得到草甘 膦的中间体双甘膦, 见反应式④. 亚磷酸法缩合反应分两步进行, 第一步加盐酸进行 反应, 见反应式③ (同三氯化磷法第二步) ;

第二步........