|
|||||
|
|
| 水洗联合固化处理电解锰渣 | |
| 引用本文： | 康志鹏, 林晔, 岳波, 闫敏婕, 孟棒棒, 梁宇廷. 水洗联合固化处理电解锰渣[J]. 环境工程学报, 2023, 17(1): 235-241. doi: 10.12030/j.cjee.202209069 |
| 作者姓名： | 康志鹏 林晔 岳波 闫敏婕 孟棒棒 梁宇廷 |
| 作者单位： | 1.沈阳建筑大学市政与环境工程学院，沈阳 110168; 2.中国环境科学研究院固体废物污染控制技术研究所，北京 100012 |
| 基金项目： | 国家重点研发计划资助项目(No.2019YFC1904802)；贵州省科技计划项目 (黔科合重大专项[2022]002) ；贵州省交通运输厅科技项目 (2021-122-005) |
| 摘 要： |  为减少电解锰渣中主要污染物锰离子和氨氮含量，降低其对环境的污染，采用水洗联合固化法处理电解锰渣，通过改变水渣比、洗涤次数、搅拌时间，固化剂添加比例，观察锰渣水洗及固化过程中锰离子、氨氮的质量浓度变化并确定最佳水洗固化条件。研究表明，水渣比为2，洗涤2次，搅拌时间30 min为最佳水洗条件，此时锰渣浸出液Mn2+、NH3-N的质量浓度分别为106.65和40.05 mg·L−1；向水洗后锰渣中添加0.15%的Na3PO4、1.00%的生石灰，0.75%的水泥和0.50%的粉煤灰为最佳固化剂添加比例，此时锰渣浸出液Mn2+、NH3-N的质量浓度分别为0.141和1.260 μg·L−1，满足污水综合排放标准。  本研究结果表明，对水洗后的锰渣进行固化处理，可以有效降低浸出液中Mn2+和NH3-N质量浓度，可为锰渣无害化处理提供参考。  |
| 关 键 词： | 水洗 固化 固化剂 锰渣 氨氮 |
| 收稿时间： | 2022-09-19 |
Treatment of electrolytic manganese slag by water washing combined curing method |
|
| KANG Zhipeng, LIN Ye, YUE Bo, YAN Minjie, MENG Bangbang, LIANG Yuting. Treatment of electrolytic manganese slag by water washing combined curing method[J]. Chinese Journal of Environmental Engineering, 2023, 17(1): 235-241. doi: 10.12030/j.cjee.202209069 | |
| Authors: | KANG Zhipeng LIN Ye YUE Bo YAN Minjie MENG Bangbang LIANG Yuting |
| Affiliation: | 1.School of Municipal and Environmental Engineering, Shenyang University of Architecture, Shenyang 110168, China; 2.Institute of Solid Waste Pollution Control Technology, Chinese Academy of Environmental Sciences, Beijing 100012, China |
| Abstract: | To reduce the content of manganese ions and ammonia nitrogen, which are the main pollutants in the electrolytic manganese slag, and reduce its pollution to the environment, the combined washing and curing method was used to treat the electrolytic manganese slag, and the changes of manganese ions and ammonia nitrogen concentrations during the washing and curing process were observed and the optimal washing and curing conditions were determined by changing the water-slag ratio, washing times, stirring time and the addition ratio of curing agent. The study showed that the water-slag ratio of 2, washing twice and stirring time of 30 min were the best washing conditions, and the concentrations of Mn2+ and NH3-N in the leachate of manganese slag were 106.65 mg·L-1 and 40.05 mg·L−1, respectively; 0.15% of Na3PO4, 1.00% of quicklime, 0. 75% of cement and 0.50% of fly ash were added to the washed manganese slag. At this time, the concentrations of Mn2+ and NH3-N in manganese slag leachate were 0.141 μg·L−1 and 1.260 μg·L−1, respectively, which satisfied the comprehensive effluent discharge standard. The results of this study showed that the curing treatment of manganese slag after water washing could effectively reduce the concentrations of Mn2+ and NH3-N in the leachate, and provide a reference for the harmless treatment of manganese slag. |
| Keywords: | water washing curing curing agent manganese slag ammonia nitrogen |
| 点击此处可从《环境工程学报》浏览原始摘要信息 | |
| 点击此处可从《环境工程学报》下载全文 | |