氯对粉末活性炭吸附水中阿特拉津性能的影响

为探讨氯对粉末活性炭(PAC)吸附水中阿特拉津效能的影响及预氯化与PAC联用工艺处理水中特定污染物时的工艺优化措施,采用小试试验研究氯的投加时间、投加量对PAC吸附阿特拉津的容量及速度的影响.结果表明,氯会显著降低PAC吸附阿特拉津的容量和速度,且氯在腐殖酸溶液中的降低程度小于在纯水中的;在腐殖酸溶液中,氯的投加时间影...

Effect of chlorine on adsorption performance of PAC for atrazine

To examine the inflence of chlorine on the adsorption effect of powdered activated carbon (PAC) for atrazine and optimize the combined project of pre chlorination and PAC adsorption, jar tests were conducted to sudy the doasage and the dosing point of chlorine’s effect on the adsorption capacity and the velocity of PAC. Results show that chlorine can decrease the adsorption capacity and the adsorption rate of the PAC to atrazine in pure water and humic acids solution. In addition, the extent of the decrease in humic acid solution is less than that in pure water;that the adding point of chlorine affects the removal effect of atrazine by the combined process in humic acids solution, in which adding chlorine before PAC adsorption can increase the removal rate by 10% than at the other two adding points; and that when the concentration decreases to below 0.2 mg/L, the negative effect of chlorine can be ignored. For the removal of relatively stable organic matters similar to atrazine,the combined process should be avoided, or used at some interval.