Naglaa Salem El-Sayed , Kholod H. Kamal , Mohamed El-Sakhawy , El Barbary Hassan , Samir Kamel
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引用次数: 0
Abstract
Industrial development has significantly escalated water pollution from heavy metals and dyes. This study explores an innovative solution using biochar (BC), a cost-effective and eco-friendly adsorbent, enhanced for improved performance. Rice straw-derived biochar was oxidized (OBC) and further immobilized with MnO2 (MnO2@OBC). Comprehensive characterization using FTIR, XRD, SEM/EDX, and TGA confirmed the structural modifications. The adsorption efficiency of BC, OBC, and MnO2@OBC was evaluated for Pb2+ and methylene blue dye (MB) with and without UV light. MnO2@OBC (1:1 wt/wt) exhibited exceptional Pb2+ removal efficiencies of 96.7 % (non-UV) and 97.1 % (UV), while OBC excelled in MB removal with efficiencies of 93.6 % (non-UV) and 94.3 % (UV). Kinetic studies revealed rapid Pb2+ adsorption within 5 mins and MB adsorption within 30 mins, following a pseudo-second-order model that highlights the importance of sorbent-contaminant interactions. High pH and sorbent dosages further enhanced removal efficiencies. Freundlich isotherm analysis indicated multilayer adsorption, with maximum adsorption capacities (qmax) of 143 and 135 mg/g for Pb2+ and MB, respectively. These findings underscore the potential of MnO2@OBC and OBC as highly effective adsorbents for water purification applications. These findings underscore the potential of MnO2@OBC and OBC as highly effective adsorbents for water purification applications.
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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