State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, 150090, Harbin, P.R. China.
Institute of Environmental Engineering, RWTH Aachen University, Aachen, Germany; Sustainability Division, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar.
J Hazard Mater. 2024 May 15;470:134182. doi: 10.1016/j.jhazmat.2024.134182. Epub 2024 Apr 6.
Establishing an economic and sustained Fenton oxidation system to enhance sludge dewaterability and carbamazepine (CBZ) removal rate is a crucial path to simultaneously achieve sludge reduction and harmless. Leveraging the principles akin to "tea making", we harnessed tea waste to continually release tea polyphenols (TP), thus effectively maintaining high level of oxidation efficiency through the sustained Fenton reaction. The results illustrated that the incorporation of tea waste yielded more favorable outcomes in terms of water content reduction and CBZ removal compared to direct TP addition within the Fe(III)/hydrogen peroxide (HO) system. Concomitantly, this process mainly generated hydroxyl radical (•OH) via three oxidation pathways, effectively altering the properties of extracellular polymeric substances (EPS) and promoting the degradation of CBZ from the sludge mixture. The interval addition of Fe(III) and HO heightened extracellular oxidation efficacy, promoting the desorption and removal of CBZ. The degradation of EPS prompted the transformation of bound water to free water, while the formation of larger channels drove the discharge of water. This work achieved the concept of treating waste with waste through using tea waste to treat sludge, meanwhile, can provide ideas for subsequent sludge harmless disposal.
建立经济且可持续的芬顿氧化体系以提高污泥脱水性能和卡马西平（CBZ）去除率，是同时实现污泥减量化和无害化的关键途径。借鉴“制茶”原理，我们利用茶渣持续释放茶多酚（TP），通过持续的芬顿反应有效地保持高氧化效率。结果表明，与在 Fe(III)/过氧化氢（HO）体系中直接添加 TP 相比，茶渣的加入在降低污泥含水率和去除 CBZ 方面产生了更有利的结果。同时，该过程主要通过三种氧化途径生成羟基自由基（•OH），有效改变了胞外聚合物（EPS）的性质，并促进了从污泥混合物中去除 CBZ。Fe(III)和 HO 的间隔添加提高了细胞外氧化效果，促进了 CBZ 的解吸和去除。EPS 的降解促使结合水转化为自由水，而较大通道的形成则推动了水的排出。这项工作通过利用茶渣处理污泥实现了以废治废的理念，同时为后续的污泥无害化处理提供了思路。
