在纳米氧化铜锌颗粒催化下用过氧化氢氧化去除水溶液中的氰化物

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Water, Air, & Soil Pollution Pub Date : 2024-06-27 DOI:10.1007/s11270-024-07298-9

Abderrahamane Boutrif, Salima Chergui, Farid Halet, Abdelmalek Chergui, Lilya Boudriche, Aïssa Ould-Dris, Erwann Guénin, Boubekeur Nadjemi, Ahmed Reda Yeddou

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引用次数: 0

摘要

本研究关注在共沉淀法制备的纳米氧化铜锌（CuO-ZnO）颗粒催化下，用过氧化氢 H2O2 氧化去除水溶液中的氰化物。研究了催化剂剂量、过氧化氢浓度、温度和催化剂稳定性对氰化物去除的影响。使用 CuO-ZnO 纳米粒子可以提高反应速率，从而显示出良好的催化活性。将催化剂剂量从 0.25 克/升提高到 1.0 克/升，反应 75 分钟后氰化物去除率从 70% 提高到 100%。将温度从 24 °C 提高到 35 °C，氰化物的去除率提高了，表观活化能等于 48 KJ/mol。该纳米催化剂连续使用了四次，表现出良好的稳定性。研究发现，氰化物的消除动力学与氰化物的消除动力学呈假一阶关系。

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Cyanide Removal from Aqueous Solution by Oxidation with Hydrogen Peroxide Catalyzed by Copper-Zinc Oxide Nanoparticles

This work is concerned with the cyanide removal from aqueous solution by oxidation with hydrogen peroxide H₂O₂ catalyzed by copper zinc oxide (CuO-ZnO) nanoparticles prepared by co-precipitation method. The influences of catalyst dose, hydrogen peroxide concentration, temperature, and catalyst stability on cyanide removal were examined. The use of CuO-ZnO nanoparticles made it possible to increase the reaction rate, thus showing good catalytic activity. The cyanide removal percentage was increased after 75 minutes of reaction time from 70% to 100% by raising the catalyst dose from 0.25 g/L to 1.0 g/L. Increasing the temperature from 24 °C to 35 °C enhanced cyanide removal rate, the apparent activation energy was then found to be equal to 48 KJ/mol. The nanocatalyst was used again for four successive times and exhibited good stability. The kinetics of cyanide elimination was found to be pseudo-first order with respect to cyanide.

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.