Removal of Chromium ions (Cr6+) and Nickel ions (Ni2+) from Simulated Industrial Wastewater Using Flow-by-Porous Electrode

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Water, Air, & Soil Pollution Pub Date : 2024-07-02 DOI:10.1007/s11270-024-07246-7

Moatasem M. Kamel, Ali M. Bastaweesy

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Abstract

The quality of water is significantly impacted by the presence of Cr⁶⁺ and Ni²⁺ ions. This study investigates the effectiveness of a flow-by porous graphite electrode cell in removing these contaminants from simulated industrial wastewater. We explore the impact of various factors on the removal process, demonstrating the method's potential for efficient removal. The initial concentration of nickel and chromium ions (20 to 80 mg/l and 20 to 100 mg/l, respectively), the feed flow rate (0.28 to 1.11 ml/s), current density (0.2 to 2.25 mA/cm²) and pH all influence the removal rate and efficiency. A higher feed flow rate negatively affects the removal efficiency of both Ni²⁺ and Cr⁶⁺ ions. Nickel removal efficiency decreased by 34.9% at 20 ppm and 26% at 80 ppm, representing the highest and lowest reductions in efficiency, respectively. Chromium removal efficiency decreased by 19% at 100 ppm and 6.5% at 50 ppm, indicating the highest and lowest reductions in efficiency, respectively, under the same flow rate change. Under optimal conditions, the removal efficiency for Ni²⁺ was 99.47% after 15 min of operation at a current density of 1.96 mA/cm², a flow rate of 0.28 ml/s, and a pH of 8 and the removal efficiency for Cr⁶⁺ was 99.97% after 10 min of operation at a current density of 2.25 mA/cm², a flow rate of 0.28 ml/s, and a pH of 2. The flow-through porous electrode system achieves efficient heavy metal removal with operating costs of 0.24 USD/m³ for nickel and 0.38 USD/m³ for chromium at optimal conditions.

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使用逐流多孔电极去除模拟工业废水中的铬离子 (Cr6+) 和镍离子 (Ni2+)

Cr6+ 和 Ni2+ 离子的存在会严重影响水质。本研究探讨了流动多孔石墨电极池去除模拟工业废水中这些污染物的有效性。我们探讨了各种因素对去除过程的影响，证明了该方法具有高效去除的潜力。镍和铬离子的初始浓度（分别为 20 至 80 毫克/升和 20 至 100 毫克/升）、进料流速（0.28 至 1.11 毫升/秒）、电流密度（0.2 至 2.25 毫安/平方厘米）和 pH 值都会影响去除率和效率。较高的进料流速会对 Ni2+ 和 Cr6+ 离子的去除效率产生负面影响。镍的去除效率在 20 ppm 和 80 ppm 时分别下降了 34.9% 和 26%，分别为最高和最低。铬的去除效率在 100ppm 和 50ppm 条件下分别降低了 19% 和 6.5%，表明在相同的流速变化条件下，去除效率分别降低了最高和最低值。在最佳条件下，电流密度为 1.96 mA/cm2、流速为 0.28 ml/s、pH 值为 8，运行 15 分钟后，Ni2+ 的去除率为 99.47%；电流密度为 2.25 mA/cm2、流速为 0.28 ml/s、pH 值为 8，运行 10 分钟后，Cr6+ 的去除率为 99.97%。流过式多孔电极系统实现了高效重金属去除，在最佳条件下，镍的运行成本为 0.24 美元/立方米，铬的运行成本为 0.38 美元/立方米。

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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.