Dihua Wu , Mengyuan Yi , Dong Zhang , Jie Zhou , Zhitong Yao , Chunhui Wang , Shaodan Xu , Yangxin Zhou , Xuesong Liu
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引用次数: 0
Abstract
Waste electrical and electronic equipment (WEEE) has increased dramatically as a result of the increasing usage of electronic gadgets. Waste printed circuit boards (WPCBs) make up a significant amount of WEEE and require efficient recycling techniques. This study focuses on the recovery of the non-metallic fraction (NMF) of WPCB as an adsorbent for tetracycline (TC) and its derivatives chlortetracycline (CTC) and oxytetracycline (OTC). The raw NMF WPCBs first went through an alkaline-thermo treatment with KOH solution and 100 °C air, and then pyrolysis at high temperature under an N2 atmosphere after FeN modification. It reveals that specific surface areas were greatly improved from 0.01027 m2/g of raw NMF WPCBs to 82.4864 m2/g of Fe-N-modified NMF, thus enhancing their pollutant adsorption capabilities. The FeN doping slightly increased the adsorption capacities and significantly shortened the equilibrium time due to the improved surface and textural properties. The FeN modified material showed uptake capacities of 94.22, 95.28, and 92.52 mg/g for TC, CTC and OTC at pH 7, which are comparably high among the other adsorbents reported. The adsorption mechanisms of TC, CTC, and OTC on Fe(3)-N(1)-800 include filling of pores, the formation of hydrogen bonds, surface complexation, π–π stacking interactions, and electrostatic forces. This study elucidates that the potential of modified WPCB NMF could be used as a functional adsorbent to remove antibiotics. This would be good for both waste utilization and environmental protection.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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