摘要
以钛白粉厂产生的酸解泥渣为研究对象,开展危险废物豁免管理研究,酸解泥渣豁免管理不仅可以减少环境风险,还能减轻企业处理处置的负担。危险特性鉴别结果表明,酸解泥渣不具有浸出毒性,毒性物质含量低于危险废物鉴别标准;酸解泥渣具有一定的腐蚀性,但水洗可降低其腐蚀性,经2次水洗后酸解泥渣不再具有腐蚀性危险特性;酸解泥渣经水洗后重金属的浸出毒性有所降低;酸解泥渣水洗后堆存时因地表径流产生的环境风险不高,水洗处理后酸解泥渣的环境风险将显著降低,3次水洗后的酸解泥渣即使在发生地质灾害时也不会造成水体水质的污染风险;钛白粉厂酸解泥渣水洗处理后可以进行豁免管理。
The acidified slime generated by titanium dioxide plant was studied to develop the hazardous wastes exemption management research, which could not only reduce the environment risk, but also lighten the load on companies regarding the treatment and disposal of hazardous wastes. The hazardous characteristics identification results showed that the acidified slime did not possess the leaching toxicity for the toxic substances content far lower than the hazardous wastes identification standards, yet it had certain corrosive nature. Rinsing could reduce the corrosivity of acidified slime. After the acidified slime was washed twice, it no longer possessed the hazardous characteristic of corrosivity. Also the leaching toxicity of heavy metals was lowered after the acidified slime was washed. When washed acidified slime was kept in storage, the environmental risk brought up by the surface runoff was not high, and the environmental risk of the acidified slime lowered remarkably after washed. If acidified slime was washed 3 times, it would not cause the pollution risk of water quality even when the geological disasters occurred. The acidified slime generated by titanium dioxide plant could thus be given exemption management after washed.
出处
《环境工程技术学报》
CAS
2013年第1期22-27,共6页
Journal of Environmental Engineering Technology
基金
国家环境保护公益性行业科研专项(200709028
200709050)
关键词
危险废物
豁免
废酸
环境风险
hazardous wastes
exemption
wasted acid
environmental risk
