| MAP法和折点氯化法联合工艺处理印制线路板铜氨废水试验研究 |
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| 引用本文： | 黄万抚,曾祥荣,黄李金鸿,李新冬,曹明帅,李睿涵. MAP法和折点氯化法联合工艺处理印制线路板铜氨废水试验研究[J]. 有色金属科学与工程, 2020, 11(1): 72-77. DOI: 10.13264/j.cnki.ysjskx.2020.01.012 |
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| 作者姓名： | 黄万抚 曾祥荣 黄李金鸿 李新冬 曹明帅 李睿涵 |
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| 作者单位： | a.江西理工大学 资源与环境工程学院，江西 赣州 341000 |
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| 基金项目： | 国家自然科学基金;江西理工大学研究生创新创业基础素质提升资助项目 |
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| 摘 要： | 在废印刷电路板回收利用时通常会产生大量含重金属离子的废水，一般含有[Cu（NH3）4]2+、NH4+和NH3·H2O，这些铜氨络离子稳定性高，处理难度极高。文中以废印刷电路板在回收利用有价金属时产生的铜氨废水为研究对象，通过MAP法和折点氯化法联合工艺对该废水进行处理，有效回收了氨氮和铜。该联合工艺不仅可以有效地节约经济成本，并且回收的铜和氨氮产物也能产生一定的经济效益。结果表明:MAP反应的较优条件为pH=9.5，废水中氨氮与投入磷盐和镁盐的摩尔比为4:1:1.1，对氨氮的去除率为23%，铜的去除率为2%，形成了磷酸氨镁沉淀。折点氯化法的较优pH为9.5，N/Cl的摩尔比为1:1.6，氨氮处理效果为98.8%，铜去除率99.8%。
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| 关 键 词： | MAP法 折点氯化法 铜氨废水 |
| 收稿时间： | 2019-07-18 |
Experimental study on treatment of copper ammonia wastewater from printed circuit board by MAP method and folded chlorination process |
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| Affiliation: | a.School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Chinab.School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| Abstract: | When waste printed circuit boards are recycled, a large amount of wastewater containing heavy metal ions is usually generated, and generally contains [Cu(NH3)4]2+, NH4+, and NH3·H2O. These copper ammine complex ions have high stability and are extremely difficult to handle. In this paper, the copper ammonia wastewater generated during the recycling of waste printed circuit boards is taken as the research object. The effective treatment of the wastewater and the recovery of ammonia nitrogen and copper are realized by the combined process of MAP method and broken point chlorination method, which can effectively save economic cost. And the recovery of products can also produce certain economic benefits. The results showed that the optimum conditions for MAP reaction were pH=9.5, the molar ratio of ammonia nitrogen to input phosphorus salt and magnesium salt in wastewater was 4:1:1.1, the removal rate of ammonia nitrogen was 23%, and the removal rate of copper was 2%. Formed a magnesium phosphate precipitate. The optimum pH of the chlorination method was 9.5, the molar ratio of N/Cl was 1:1.6, the ammonia nitrogen treatment effect was 98.8%, and the copper removal rate was 99.8%. |
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