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Regenerating Spent Zeolites with UV and UV/H2O2 to Enhance Removal of Endocrine Disrupting Compounds 用UV和UV/H2O2再生废沸石以增强内分泌干扰物的去除
发布日期: 2008-11-01
内分泌干扰物(EDC)具有生物活性,因此在水处理领域一直备受关注 在纳克每升的浓度,并已被证明会导致性发育 水生野生动物的破坏。吸附过程已显示出良好的前景 EDC去除过程中,由于许多EDC的疏水性以及由此产生的 这些化合物对疏水表面的亲和力。除了传统的吸附 涉及活性炭的方法,最近的工作一直在检查活性炭的有效性 用于去除疏水性污染物的高硅沸石。小型吸附 进行研究,以收集三种EDC(E1、E2、EE2)的基线吸附数据 三种玉米醇溶物(疏水性从低到高)。 紫外线和紫外线的效率 UV/H2O2治疗正在通过实验室规模的准直光束研究进行研究。 初步数据表明,90%的吸附E1可以从DAY沸石中去除 在2000 mJ cm的剂量下单独使用紫外线-2。虽然E1在结构上与E2和EE2相似,但 如图所示,直接紫外线降解这些化合物的效率差异很大 通过量子产额的变化。因此,UV/H2O2AOP也被测试为 去除并氧化EDC。包括21个参考文献、表格和图表。
Endocrine disrupting compounds (EDCs) are a continual source of concern in water treatment, as they are biologically active at nanogram per liter concentrations, and have been shown to cause sexual development disruption in aquatic wildlife. Adsorption processes have shown promise as excellent EDC removal processes, due to the hydrophobic nature of many EDCs and the resulting affinity of these compounds for hydrophobic surfaces. In addition to traditional sorption methods involving activated carbon, recent work has been examining the effectiveness of high silica zeolites for removal of hydrophobic contaminants. Bench scale adsorption studies are performed to collect baseline adsorption data for three EDCs (E1, E2, EE2) on three zeolytes (ranging from low to high hydrophobicity). The efficiency of UV and UV/H2O2 treatment is being studied with bench-scale collimated beam studies. Preliminary data indicated 90% of adsorbed E1 can be removed from DAY zeolite with UV alone at a dose of 2000 mJ cm-2. While E1 is structurally similar to E2 and EE2, the efficiency of direct UV for degrading these compounds varies significantly, as indicated by the variation in quantum yield values. Therefore, UV/H2O2 AOP was also tested for removing and oxidizing the EDCs. Includes 21 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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