Junlong Cai , Bin Liu , Fazhi Xie , Xin Mao , Bing Zhang
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引用次数: 0
Abstract
Cr(VI) in chromium-containing industrial wastewater, which is highly toxic and difficult to degrade, brings great challenges to the treatment of industrial wastewater. However, conventional chromium removal methods suffer from low efficiency and secondary contamination. This study demonstrates that the micelle-enhanced nanofiltration (MENF) process is an effective strategy for the removal of Cr(VI). Micelles generated from two commonly used cationic surfactants (cetyltrimethylammonium bromide (CTAB) and cetyltrimethylammonium chloride (CTAC)) were capable of complexing with Cr(VI), resulting in the formation of aggregates with larger hydrodynamic diameters that were effectively retained by the membrane. The results showed that CTAC had a greater performance in removing Cr(VI) compared to CTAB, and the removal rate can reach 98.55 % at an initial concentration of 100 ppm. Meanwhile, the retention rate of surfactant under each condition was more than 96.23 %, which effectively reduced the generation of secondary pollution. Even in the presence of interfering anions, Cr(VI) still had a high affinity for cationic surfactant micelles. In addition, concentration polarization and micelles deposition acted as the main fouling potential during MENF process. This study provides a new insight into technological innovation and environmental protection in the field of wastewater treatment.
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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