| 溴离子和溴酸盐活性炭竞争吸附及溴酸盐生成影响 |
| 摘要点击 2229 全文点击 1773 投稿时间：2007-04-24 修订日期：2007-06-27 |
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| 中文关键词 溴离子 溴酸盐 活性炭 吸附 |
| 英文关键词 bromine bromate activated carbon adsorption |
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| 中文摘要 |
| 采用3种活性炭对水体中溴离子和溴酸盐的吸附去除规律进行了考察. 结果表明，单吸附条件下溴离子和溴酸盐的吸附去除效率分别达到69％和88％以上，双吸附质条件时溴离子去除率减少到10％，溴酸盐去除率为60％以上；有机物与溴酸盐之间存在竞争吸附关系，AC-400的孔径分布条件更适合于有机物的吸附过程，而不利于溴酸盐的吸附，在低浓度平衡溶液条件下（ce<72 mg·L－１），AC-100对有机物的吸附能力较高，在溶液平衡浓度72 mg·L－１<ce<211 mg·L－１条件时，AC-150对有机物的吸附能力较强，影响程度取决于活性炭比表面积和粒度分布等因素；溴酸盐的去除效率同时受到水体中氨含量和pH的影响，氨含量超过200 μg/L以上溴酸盐减少量变化不显著，较低pH值溴酸盐生成量较少. |
| 英文摘要 |
| Regularity of adsorption removal for bromine and bromate in water has been tested by three different activated carbon. It is demonstrated that in single adsorbent solution adsorption removal rates for bromine and bromate is 69% and 88%, respectively. As for double adsorbent solution, the removal rate of bromine decreased to 10% and of bromate is higher than 60%. The competitive adsorption between NOM and bormate is due to surface area and pore size distribution etc. The pore size distribution for AC-400 favors NOM adsorption process but hinders bromate adsorption. In low concentration solution（ce<72 mg·L－１） NOM is absorbed with high rate, while in the solution with the concentration between 72 mg·L－１ and 211 mg·L－１, AC-150 is effective in removing NOM. Furthermore, ammonia concentration and pH level has impact on bromate removal rate in water. The optimal conditions for bromate removal are determined by ammonia concentration less than 200 μg/L and low pH in water. |
