摘要
采用CO2生成量法测试水中季铵盐浮选药剂的生物降解性。在通氧条件下,以十二胺降解的最佳环境条件为基础,考察双烷基季铵盐、双酯季铵盐的生物降解性。结果表明:十二胺在通气量16 L/h,微生物浓度100 mg MLSS/L,受试物浓度20 mg DOC/L的最佳环境条件下,28 d的生物降解率为74.34%。双酯基季铵盐28 d的生物降解率为81.18%,而双烷基季铵盐几乎不降解。按照生物降解性评价标准-生物降解性指数(IB),双酯季铵盐可生物降解;双烷基季铵盐属于难降解有机物。
The carbon dioxid e evolution test was used to determine the biodegradability of cationic flotation collectors in water. Based on the optimal degradation conditions of laurylamine, the biodegradability of other collectors were studied. The results showed that under the best degradation conditions of the gas flow of 16L/h, the inoculum concentration of100 mg MLSS/L, the test substances concentration of 20 mg DOC/L, the reaction time of 28 d, the degradation rate of laurylamine was 74.34%. The degradation rate of diester quaternary ammonium salt was 81.18%, And double alkyl quaternary ammonium salt was almost no degradable. In accordance with evaluation criteria- biodegradability index（IB）, and diester quaternary ammonium salt could be biodegradable, another collector inhibited the growth of microorganisms was classified as difficult biodegradable organic substances.
出处
《能源环境保护》
2015年第5期30-32,共3页
Energy Environmental Protection
基金
国家自然科学基金资助项目(50579080)
关键词
季铵盐
好氧生物降解
CO2生成量法
Quaternary ammonium salt
aerobic biodegradation
carbon dioxide evolution test
