锌系磷化废水去锌除磷的研究  

REMOVAL OF ZINC AND PHOSPHATE FROM ZINCIC PHOSPHATIZING WASTEWATER

作　　者：雷育涛[1] 罗建中[1] 宋光敏[1] 陈平[1] 

机构地区：[1]广东工业大学环境科学与工程学院,广州510090

出　　处：《腐蚀与防护》2005年第8期351-354,共4页Corrosion & Protection

摘　　要：以Fe3(SO4)2和CaCl2为沉淀剂处理磷化废水,研究废水中锌对磷化溶液化学特性的影响.结果表明,当进水TP(总磷)浓度为15.67mg/L,不加任何沉淀剂,以NaOH调节pH到12.10,处理后出水磷浓度为9.53mg/L;采用Fe3(SO4)2为沉淀剂时,进水磷浓度为11.97mg/L,出水磷浓度为0.44～0.26mg/L,除磷的最佳pH范围为3.04～5.50;改用CaCl2沉淀剂,进水磷浓度为12.24mg/L,出水磷浓度小于0.47mg/L,除磷的pH大于10.72,除锌pH大于8.00,因此在碱性条件下,能同时达到除磷和除锌的要求,处理后出水达标排放.In the case of treating phosphatizing wastewater containing zinc, zinc has an impact on the solution chemistry, specially on pH. Fe3 （SO4）2 and CaCl2 were used as precipitators to remove phosphate from zincic phosphatizing wastewater and the optimum pH was investigated. Zinc ion had a significant effect on the optimum pH. The optimum pH ranges were 12. 10 （inlet concentration of 15.67mg/L, outlet concentration of 9. 53mg/L）, 3. 0445.50（inlet concentration of 11.97mg/L, outlet concentration of 0. 44～0. 26mg/L）, and more than 10. 72 （inlet concentration of 12. 24mg/L, outlet concentration of less than 0. 47mg/L） under the conditions withour precipitatiors, with Fe3 （SO4）2 and with CaCl2 respectively.

关 键 词：磷化废水 化学沉淀法 含锌的 

分 类 号：X781[环境科学与工程—环境工程]