| 石灰铝盐法沉淀废水中高浓度氯离子的研究 |
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| 引用本文：唐宝玲,左松,陈胜文,顾卫星,王利军.石灰铝盐法沉淀废水中高浓度氯离子的研究[J].上海第二工业大学(中文版),2018,(4):255-262 |
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| 基金项目:上海市高原学科–环境科学与工程(资源循环科学与工程), 上海第二工业大学培育学科建设项目(EGD18YJ0029), 青
浦区产学研合作发展资金项目(青产学研2018-48) 资助 |
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| 中文摘要:工业废水中高氯离子使其具有腐蚀性并妨碍水生动植物生长, 破坏生态环境, 在排放之前必须进行氯离子
去除, 达到排放要求。探究了单因素对氯离子去除率的影响, 并讨论了投料比、搅拌时间、静置时间以及体系初始
pH 对去除率影响及交互作用。研究表明: 搅拌速度为400 r/min, n(Al3+) : n(Ca2+) 为1 : 3.3, 搅拌时间为30 min, 静
置时间为30 min, 废水初始pH 为10 时, 去除效果最佳。应用所得最佳条件对实际水样进行二次去除实验并探讨了
相关影响因素。对实际水样二次氯离子去除实验的最佳工艺条件: 当n(Cl-):n(Al3+) : n(Ca2+) 为1 : 3.6 : 12, 初始溶
液浓度为4 g/L 时, 并且需要在二阶段投加药品前调节体系pH 值至弱碱性, 氯离子去除效率可达95%, 浓度可降到
400 mg/L 以下。通过X 射线洐射分析可知, 沉淀产物为层状结构的弗氏盐[Ca2Al(OH)6Cl·2H2O]。此方法成本低、
无污染, 对高氯废水去除有很好的应用价值。 |
| 中文关键词:氧化钙 铝酸钠 氯离子 去除 废水处理 |
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| Study on Precipitation of High Concentration Chloride Ion in Wastewaterby Lime with Aluminum Salt |
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| Abstract:The high chloride ion in industrial wastewater makes it corrosive and hinders the growth of aquatic animals and plants,
destroys the ecological environment, and must be removed before discharge to meet emission requirements. The influence of single
factor on chloride removal rate was explored, and the effects of feed ratio, stirring time, standing time and initial pH on removal rate
and interaction were discussed. The research shows that the stirring speed is 400 r/min, n(Al3+) : n(Ca2+) is 1 : 3.3, the stirring time is
30 min, the standing time is 30 min, and the initial pH of the wastewater is 10, the removal effect is best. The actual conditions were
applied to the second water removal experiment and the relevant influencing factors were discussed. The optimum process conditions
for the secondary chloride ion removal experiment of the actual water sample were that n(Cl- : n(Al3+) : n(Ca2+) is 1 : 3.6 : 12, and
the initial solution concentration is 4 g/L. It is also necessary to adjust the pH of the system to a weak alkaline before adding the drug
in the second stage, the chloride ion removal efficiency can reach 95%, and the concentration can be reduced to below 400 mg/L. X-ray
diffraction analysis shows that the precipitated product is a layered structure of Freund,s salt [Ca2Al(OH)6Cl·H2O]. This method has
low cost and no pollution, and has good application value for high chlorine wastewater removal. |
| keywords:calcium oxide sodium aluminate chloride ion remove wastewater treatment |
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