| 5种颗粒活性炭对水中卤乙酸的等温吸附试验 |
| 摘要点击 2323 全文点击 2696 投稿时间：2004-06-21 修订日期：2004-07-08 |
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| 中文关键词 饮用水 卤乙酸 颗粒活性炭 等温吸附 水处理 |
| 英文关键词 drinking water GAC HHAs haloacetic acids isothermal adsorption water treatment |
| DOI 10.13227/j.hjkx.20050320 |
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| 中文摘要 |
| 通过等温吸附实验,考察了5种不同类颗粒活性炭(GAC)对消毒副产物卤乙酸(HAAs)中致癌风险较高的二氯乙酸、三氯乙酸的吸附行为.结果表明:二氯乙酸、三氯乙酸的吸附行为符合Langmuir等温式;进口活性炭A对二氯乙酸饱和吸附量是3种国产活性炭的4.4～5.7倍,是另一种进口活性炭B的3.8倍;对三氯乙酸的饱和吸附量是3种国产活性炭的4.0～5.4倍,是另一种进口活性炭B的2.6倍.针对进口活性炭A开展的进一步研究结果表明,二氯乙酸、三氯乙酸2组分的相对吸附量与2组分的相对浓度成正比关系,二氯乙酸吸附容量变化对平衡浓度的敏感程度不如三氯乙酸. |
| 英文摘要 |
| Adsorption performance of 5 GACs were compared on two abundant haloacetic acids (HAAs) as disinfection by-products (dichloroacetic acid and trichloroacetic acid). The adsorption behaviours of the two HAAs were well correlated with Langmuir equation. When the two HAAs co-existed, trichloroacetic acid tended to be adsorbed more easily. The adsorption capacity of a foreign GAC-A for dichloroacetic acid was 4.4～5.7 times that of domestic GACs, and 3.8 times that of another foreign GAC-B,while the adsorption capacity of a foreign GAC-A for trichloroacetic acid was 4.0～5.4 times that of domestic GACs, and 2.6 times that of another foreign GAC-B. The equilibrium study of competitive adsorption between dichloroacetic acid and trichloroacetic acid on GAC-A demonstrates that the relative adsorption capacity of HAAs has a linear increase with their relative equilibrium concentration. The adsorption capacity for trichloroacetic acid is sensitive to changes at its equilibrium concentration greater than that for dichloroacetic acid. |
