新兴关注的水相污染物被活性炭吸附:比较固定床柱研究和现场再生方法
Vinicius Diniz1, Susanne Rath1
1Department of Analytical Chemistry, Institute of Chemistry, University of Campinas, Rua Josué de Castro, s/n, Cidade Universitária, Campinas, SP 13083-970, Brazil.
Journal of hazardous materials
|August 5, 2023
概括
这项研究表明,活性炭 (AC) 能够有效地从水中吸收新兴关注的污染物 (CEC). 优化液压保留时间 (HRT) 和使用预处理是使用交流柱有效净化水的关键.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 吸附科学 吸附科学
背景情况:
- 家庭废水中的新兴关注污染物 (CEC) 对水质构成风险.
- 活性炭 (AC) 广泛用于吸附性去除污染物.
- 了解不同水矩阵中的吸附行为对于有效的治疗至关重要.
研究的目的:
- 研究5种CEC (咖啡因,酸,糖,硫甲,糖) 在2种AC上吸附的情况.
- 评估水性矩阵 (超纯水,WWTP废水,再利用水) 对吸附能力 (qads) 的影响.
- 评估固定床柱运行参数,特别是液压保留时间 (HRT) 和流量模式 (上流与下流) 对吸附性能的影响.
主要方法:
- 固定床柱吸附实验使用两个具有不同颗粒大小和表面积的AC.
- 测试超纯水,废水处理厂 (WWTP) 废水和预处理的再利用水中的吸附性.
- 分析CEC吸附能力 (qads),柱子寿命和再生效率.
主要成果:
- 在下流模式下,AC1的吸附能力高于AC2.
- 对于CEC的吸附顺序是咖啡因 > 硫甲醇 > 甲 = 糖 > 糖.
- 与超纯水相比,WWTP废水降低了qads高达4.1倍,而再利用水则降低了高达1.2倍.
- 上流模式保持了相似的吸附能力和柱子寿命,无论交流类型如何,突出显示HRT是关键因素.
- 使用乙醇的AC1再生实现了97.2%的效率.
结论:
- 液压保留时间 (HRT) 是固定床吸附过程中用于CEC去除的关键因素.
- 水矩阵成分显著影响交流吸附能力,强调需要预处理.
- 优化运行参数和预处理策略对于提高基于AC的水处理系统的性能和寿命至关重要.
- 活性炭显示了在水净化中有效的现场再生和再利用的潜力.
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