苯达松生产高浓度含磷废水的镁盐-钙盐协同沉淀处理及资源化研究  

Treatment and resource recovery of wastewater containing high concentration phosphorus from bentazon production by Ca^2+-Mg^2+synergistic precipitation

作　　者：张磊 刘帅 刘德启[1] ZHANG Lei;LIU Shuai;LIU Deqi(College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China;Suzhou Collaborative Innovation Center of Nano Science and Technology,Suzhou 215123,China;Zhejiang Zhongshan Chemical Group Stock Co.Ltd.,Changxing 313100,China;College of Textile and Clothing Engineering,Soochow University,Suzhou 215021,China)

机构地区：[1]苏州大学材料与化学化工学部,江苏苏州215123 [2]苏州纳米科技协同创新中心,江苏苏州215123 [3]浙江中山化工集团股份有限公司,浙江长兴313100 [4]苏州大学纺织与服装工程学院,江苏苏州215021

出　　处：《化工环保》2020年第3期253-258,共6页Environmental Protection of Chemical Industry

基　　金：国家重点研发计划项目(2017YFC0210603)。

摘　　要：采用鸟粪石结晶协同钙盐沉淀法从苯达松生产高浓度含磷废水中回收磷酸盐沉淀物,探讨了磷回收效果的影响因素,并对所得磷酸盐沉淀物进行了定量分析和盆栽对照实验。实验结果表明:在pH为9~10、n(Mg^2+)∶n(NH4^+)∶n(PO4^3-)为1.2∶1∶1的最佳条件下加入氯化镁和氯化铵,磷回收率(以磷计)可达95.7%;再按照n(Ca^2+)∶n(Mg^2+)为0.10加入氯化钙,磷总回收率达到99.1%,上清液中磷质量浓度降至8.7 mg/L;每盆施用3 g磷酸盐沉淀物,对开豆41^#具有显著的增效作用,对杂草猪殃殃也有较好的除草效果。Phosphate precipitate was recovered from the wastewater containing high concentration phosphorus from bentazon production by struvite crystallization and calcium salt precipitation method.The factors affecting phosphorus recovery were discussed,and the phosphate precipitates were tested by quantitative analysis and potted plant control experiments.The experimental results show that:The phosphorus recovery rate can reach 95.7%when magnesium chloride and ammonium chloride are added under the optimum conditions of pH 9-10 and n(Mg^2+)∶n(NH4^+)∶n(PO4^3-)is 1.2∶1∶1,and then 99.1%after calcium chloride is added according to n(Ca^2+)∶n(Mg^2+)0.10,the mass concentration of phosphorus in supernatant is reduced to 8.7 mg/L;The application of 3 g phosphate precipitate per pot has significant synergistic effect on kaidou 41^#,and has good weeding effect on the weedy Galium aparine Linn.var.tenerum(Gren.et Godr.)Rch.

关 键 词：苯达松生产废水 磷酸盐 沉淀法 沉淀物分析 

分 类 号：X786[环境科学与工程—环境工程]