| 煅烧温度对硅藻土净化焦化废水效能的影响 |
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| 作者姓名： | 谷启源 吴根 宋存义 李国亭 赵伟高 |
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| 作者单位： | 1. 北京科技大学土木与环境工程学院, 北京 100083; |
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| 基金项目： | 城市水资源与水环境国家重点实验室开放基金;大学生创新性实验计划 |
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| 摘 要： | 选用临江硅藻土和张家口硅藻土进行焦化废水的吸附净化,作为焦化废水预处理和后处理的手段.考察了不同温度煅烧对硅藻土自身性质和对焦化废水净化效能的影响,探讨了硅藻土作为焦化废水净化手段的可行性.能谱分析表明原始张家口硅藻土中有机质含量偏高.煅烧前后两种硅藻土的形貌、晶型并未发生明显变化;煅烧后两种硅藻土中碳含量有所减少.无论煅烧与否,临江硅藻土在254nm和269nm处色度去除方面都明显优于张家口硅藻土.500℃煅烧的临江硅藻土对化学需氧量的去除率达到61.8%,而张家口硅藻土仅达到30.3%;500℃煅烧的临江硅藻土对氨氮的去除率达到50.4%.实验结果证明硅藻土可以作为焦化废水的预处理和后处理手段.
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| 关 键 词： | 硅藻土 煅烧 焦化废水 吸附 废水处理 |
| 收稿时间： | 2011-07-10 |
Influence of diatomite calcination temperature on the purification of coking wastewater |
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| Affiliation: | 1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Basic Research Service, Ministry of Science and Technology of the People's Republic of China, Beijing 100862, China;3. Department of Environmental and Municipal Engineering, North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China |
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| Abstract: | As pretreatment or post-treatment for coking wastewater, two kinds of diatomites from Linjiang and Zhangjiakou in China were selected for the adsorption and purification of coking wastewater. The influences of diatomite calcination temperature on their properties and purification performance were studied during coking wastewater treatment. The feasibility of using the diatomite as a sorbent in coking wastewater treatment was also discussed. Energy dispersive spectroscopy results indicate that raw Zhangjiakou diatomite shows a higher organic content. The morphologies and crystal structures of both the diatomites do not significantly change before and after calcination. A decrease in carbon content was observed for both the diatomites after calcination. As to the color removal at 254 and 269 nm, Linjiang diatomite is particularly superior to Zhangjiakou diatomite whether the diatomites are calcined or not. For example, after calcination at 500℃, the removal of chemical oxygen demand achieves to 61.8% for Linjiang diatomite while it only reaches 30.3% for Zhangjiakou diatomite. In addition, the removal of ammonia nitrogen can achieve to 50.4% for Linjiang diatomite after the calcination. It is concluded that the diatomite involved can be used for the pretreatment and post-treatment of coking wastewater. |
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