高氯含量廢水去除氯離子之研究

A Study on Removing Chlorine Ions from High Chlorine Containing Wastewater

曾淑滿(S. M. Tseng) ； 鄭大偉(T. W. Cheng)

《鑛冶：中國鑛冶工程學會會刊》 55卷2期 (2011/06) Pp. 31-37

https://doi.org/10.30069/MM.201106.0003

摘要

工業上所排放之廢水常含有許多有害性之物質，如重金屬或高濃度之鹽類，若未經處理而排放，將會對環境造成傷害。而垃圾掩埋場之滲出水、鞣革業或底渣再利用時所排放之洗滌廢水，經常含有高濃度之氯鹽。由於高氯含量之廢水會對輸送之管路造成腐蝕，直接排放時亦會對農漁產業之灌溉或養殖造成不良之影響，目前並無適當之處理方法。因此，高氯含量之廢水處理成為一個重要之研究課題。本研究利用添加鋁系、鈣系化合物於含氯之水溶液中，使鈣、鋁離子與水中之氯離子結合，形成不溶性之弗氏鹽（Ca2Al(OH)6Cl．2H2O），以達到去除水中氯離子之效果。並且探討鈣系化合物與鋁系化合物之添加量，對於去除溶液中氯離子之影響。實驗結果顯示，經二階段除氯後，氯離子去除率可達85％以上，沉澱合成之固體成份為鈣鋁氯化合物之弗氏鹽。因此可證實本方法確實可有效去除水中之氯鹽，以減少後續之廢水處理問題。

關鍵字

除氯 ； 含氯廢水 ； 弗氏鹽

並列摘要

Industrial wastewater often contains many hazardous substances, such as heavy metals or high concentration of salts. Landfill, tanning industry or bottom ash treatment wastewater usually contain a high concentration of chlorine. Therefore, removing chlorine from high chlorine concentration wastewater becomes an important issue.This study investigated chloride removal from water. A series of aluminum compounds and calcium compounds were added in a chlorine-containing water solution to precipitate insoluble Ca-Al-Cl compounds. XRD analysis results show that this compound was Friedel's salt. The chlorine removal increased with increasing amount of calcium ions. The best chlorine removal ratio can reach 85% in a two-stage removal system. This chlorine removal method has a great potential for treating high chlorine containing wastewater.

並列關鍵字

chlorine removal ； high chlorine containing wastewater ； Friedel's salt