Optimizing organic pollutant removal from hydrazine hydrate waste brine through thermal activation of sodium persulfate assisted by response surface methodology

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-01-01 DOI:10.1016/j.jwpe.2024.106687

He Sun , Guohao Geng , Shilong Lin , Doufeng Wu , Sanchuan Yu , Congjie Gao

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Abstract

Addressing the environmental impact of toxic waste from hydrazine manufacturing is crucial due to its severe implications for ecosystem health. This study focused on optimizing the removal of organic pollutants from hydrazine hydrate waste brine. By utilizing thermally activated sodium persulfate (Na₂S₂O₈), a mathematical model was developed that links operational variables—temperature, Na₂S₂O₈ concentration, pH, and reaction time—with the efficiency of total organic carbon (TOC) removal. The application of response surface methodology (RSM) incorporating the Box-Behnken Design (BBD) facilitated the identification of optimal conditions: Na₂S₂O₈ concentration of 4.22 g·L⁻¹, pH of 9.8, temperature of 90.0 °C, and reaction time of 180 min. These conditions achieved a TOC removal efficiency of 86.6 %, closely matching the actual experimental efficiency of 87.3 %. This study not only validates the effectiveness of RSM in refining the Na₂S₂O₈ treatment process but also underscores the efficiency of thermally activated Na₂S₂O₈ in purifying water from organic pollutants. The findings offer valuable insights into environmental management and endorse the sustainable development of waste treatment technologies.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

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