Department of Chemistry, Visvesvaraya National Institute of Technology (VNIT), Nagpur 440010, India.
Department of Chemistry, Visvesvaraya National Institute of Technology (VNIT), Nagpur 440010, India.
Carbohydr Polym. 2022 Feb 15;278:118940. doi: 10.1016/j.carbpol.2021.118940. Epub 2021 Nov 27.
Emerging contaminants (ECs) are often detected in water bodies due to their prevalent use combined with inefficiency of the conventional wastewater treatment plants for their complete removal. Elimination of ECs using photocatalysis as a tertiary treatment can be a sustainable option for the reuse wastewater. Reported herewith is a photocatalyst, chitosan-based zirconia hybrid composite (ZrOCTS-HC) for the individual/ simultaneous degradation of multiple ECs like Congo red (CR), Methyl orange (MO) and 4-hydroxybenzoic acid (4-HA) under visible light irradiation. Successfully synthesized ZrOCTS-HC as confirmed by theoretical and various characterization techniques depicted photodegradation efficiency of 91.11, 69.11 and 78.40% for CR, MO and 4-HA respectively (SD 0.5-0.95; HPLC) aided by the reactive hydroxyl radical. Probable degradation mechanism supported by LC-MS/MS, COD and TOC along with reusability and antibacterial ability towards E.Coli & S.aureus is also reported. ZrOCTS-HC can be a good option for elimination of residual ECs during tertiary treatment.
新兴污染物 (ECs) 由于其广泛使用，而传统废水处理厂对其去除效率不高，因此经常在水体中被检测到。将光催化作为三级处理方法用于去除 ECs 可以是废水再利用的可持续选择。本文报道了一种壳聚糖基氧化锆杂化复合材料 (ZrOCTS-HC) 作为光催化剂，用于可见光照射下单独/同时降解多种 ECs，如刚果红 (CR)、甲基橙 (MO) 和 4-羟基苯甲酸 (4-HA)。通过理论和各种表征技术成功合成了 ZrOCTS-HC，证实了其对 CR、MO 和 4-HA 的光降解效率分别为 91.11%、69.11%和 78.40%（SD 0.5-0.95；HPLC），这得益于反应性羟基自由基的存在。还通过 LC-MS/MS、COD 和 TOC 以及对 E.Coli 和 S.aureus 的可重复使用性和抗菌能力来支持可能的降解机制。ZrOCTS-HC 可以作为三级处理中去除残留 ECs 的一种选择。
