Department of Civil and Resource Engineering, Dalhousie University, 1360 Barrington St. D514, Halifax, Nova Scotia B3H 4R2, Canada.
Department of Civil and Resource Engineering, Dalhousie University, 1360 Barrington St. D514, Halifax, Nova Scotia B3H 4R2, Canada.
J Hazard Mater. 2014 May 30;273:85-93. doi: 10.1016/j.jhazmat.2014.03.031. Epub 2014 Mar 27.
The fate of pharmaceutically active compounds (PhACs) in wastewater treatment systems is an area of increasing concern. Little research has been done to understand this issue in rural or decentralized communities. The objective of this research was to examine the ability of a bench scale nitrifying recirculating biofilter (RBF) to remove four acidic PhACs: gemfibrozil, naproxen, ibuprofen and diclofenac from secondary treated municipal wastewater at concentrations of 20 and 200μg/L. The average removals in this study were between 92 and 99% for ibuprofen, 89 and 99% for naproxen, 62 and 92% for gemfibrozil and 40 and 76% for diclofenac, which is consistent with literature. Ibuprofen and naproxen were largely removed through biological transformation; whereas gemfibrozil and diclofenac showed more variable removal, likely due to both biological transformation and sorption processes. PhAC removal in the RBFs was repeatable between trials, robust and responsive to system upsets, and the presence of PhACs as a single compound versus mixtures had no impact on PhAC removal efficiency. In summary, this study indicates that RBFs as a nitrifying stage of a multi-stage filtration process could be a viable technology for removal of some acidic pharmaceuticals in small onsite wastewater treatment facilities.
制药活性化合物（PhACs）在废水处理系统中的命运是一个日益受到关注的领域。在农村或分散社区中，对于理解这一问题的研究很少。本研究的目的是检验中试硝化循环生物滤池（RBF）从浓度为 20 和 200μg/L 的二级处理城市废水中去除四种酸性 PhACs（吉非贝齐、萘普生、布洛芬和双氯芬酸）的能力。在本研究中，布洛芬的平均去除率在 92%至 99%之间，萘普生的平均去除率在 89%至 99%之间，吉非贝齐的平均去除率在 62%至 92%之间，双氯芬酸的平均去除率在 40%至 76%之间，这与文献一致。布洛芬和萘普生主要通过生物转化去除；而吉非贝齐和双氯芬酸的去除率则变化较大，可能是由于生物转化和吸附过程的共同作用。RBF 中的 PhAC 去除在试验之间具有可重复性、稳健性和对系统干扰的响应性，并且 PhAC 作为单一化合物存在与混合物存在对 PhAC 去除效率没有影响。总之，本研究表明，RBF 作为多级过滤工艺的硝化阶段，可能是小型现场废水处理设施中去除某些酸性药物的一种可行技术。
