在饮用水配送系统内控制化和化DBP,使用颗粒活性炭和生物过
George William Kajjumba1,2,3, Ceonie M M Washington1,2, Cagri Utku Erdem4,5
1Water Quality Research and Development Division, Southern Nevada Water Authority, 1299 Burkholder Blvd, Henderson, Nevada 89015, United States.
Environmental science & technology
|March 4, 2026
概括
颗粒活性炭 (GAC) 和生物活性炭 (BAC) 有效地减少饮用水中的酸和酸消毒副产品 (Br-/I-DBPs),显著降低毒性. 然而,重新化可以部分扭转这些益处.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 公共卫生 公共卫生
背景情况:
- 消毒副产品 (DBPs),特别是和的物种 (Br-/I-DBPs),是饮用水分配系统的一个问题.
- 这些DBP有助于饮用水的总体计算添加剂毒性 (CAT).
- 活性炭过是一种常见的方法,用于从水中去除有机污染物.
研究的目的:
- 评估现场规模颗粒活性炭 (GAC) 和生物活性炭 (BAC) 过器在去除Br-/I-DBPs方面的有效性.
- 评估GAC和BAC处理对饮用水计算的添加剂毒性 (CAT) 的影响.
- 在活性炭处理后进行补充化后,研究DBP的形成和CAT的变化.
主要方法:
- 平行现场规模的GAC和BAC过器运行了11个月.
- 分析了37种DBP物种的水样,重点是Br-/I-DBPs.
- 确定了计算的添加剂毒性 (CAT),并分析了微生物群落.
主要成果:
- GAC有效地去除了所有被监测的甲 (HAL),乙 (HAN) 和乙酸 (HAA),并完全去除了多达3000个床体积的三甲 (THM),使CAT减少了99%.
- BAC还删除了所有HAN,HAL和HAA,CAT减少了99%,但THM删除有限.
- 在GAC或BAC处理后进行的补充化导致THM,HAL和HAA的形成,恢复了30-55%的原始CAT,主要是由于化HAL. 微生物分析发现了DBP降解的种群,也发现了机会性病原体.
结论:
- GAC和BAC都有效地减轻饮用水配送系统中的Br-/I-DBPs,从而大大降低了计算的添加剂毒性.
- 处理后的消毒是必要的,因为BAC过器中可能存在机会性病原体.
- 再化部分抵消了活性炭处理的好处,因为它形成了新的DBP并增加了CAT.
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