Use of thermally activated Fenton sludge for Cd removal in zinc smelter wastewater: Mechanism and feasibility of Cd removal

Cho, Eun-Ji; Kang, Jin-Kyu; Lee, Changgu; Bae, Sungjun; Park, Seong‐Jik

doi:10.1016/j.envpol.2023.122166

Cited by 16 publications

(3 citation statements)

References 104 publications

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“…These materials can be prepared into adsorbents through activation and calcination treatment, the adsorption mechanism of which involves mainly ion exchange and surface coordination. Eun-Ji Cho et al [84] utilized the Fenton oxidation process to treat ES. The obtained Fenton sludge was activated at various temperatures to produce active adsorbents for the removal of Cd 2+ from wastewater.…”

Section: Materialization Treatmentmentioning

confidence: 99%

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Guo,

Wang,

Liu

et al. 2024

Materials

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The disposal of electroplating sludge (ES) is a major challenge for the sustainable development of the electroplating industry. ESs have a significant environmental impact, occupying valuable land resources and incurring high treatment costs, which increases operational expenses for companies. Additionally, the high concentration of hazardous substances in ES poses a serious threat to both the environment and human health. Despite extensive scholarly research on the harmless treatment and resource utilization of ES, current technology and processes are still unable to fully harness its potential. This results in inefficient resource utilization and potential environmental hazards. This article analyzes the physicochemical properties of ES, discusses its ecological hazards, summarizes research progress in its treatment, and elaborates on methods such as solidification/stabilization, heat treatment, wet metallurgy, pyrometallurgy, biotechnology, and material utilization. It provides a comparative summary of different treatment processes while also discussing the challenges and future development directions for technologies aimed at effectively utilizing ES resources. The objective of this text is to provide useful information on how to address the issue of ES treatment and promote sustainable development in the electroplating industry.

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Section: Materialization Treatmentmentioning

confidence: 99%

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Guo,

Wang,

Liu

et al. 2024

Materials

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“…It has a particularly strong negative effect on the environment due to its tendency to bioaccumulate within organisms, its persistent nature, and its non-biodegradability (Kang et al, 2023). Cd thus has a detrimental effect on human health, leading to disorders affecting the bones, liver, kidneys, lungs, testes, brain, and immune and cardiovascular systems, while also contributing to the onset of Itai disease (Cho et al, 2023;Qasem et al, 2021). However, Cd is often found in compound form within the natural environment, with surface soils containing a background concentration of 0.53 mg/kg, resulting in minimal health risks under typical environmental conditions (Liu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…To date, various approaches have been employed to remove Cd from wastewater, including chemical precipitation (Habte et al, 2020;Serrano et al, 2021), coagulation and flocculation (Bora & Dutta, 2019;Teh et al, 2016), adsorption (Cho et al, 2023;Hong et al, 2021), ion exchange (Berbar et al, 2019), reverse osmosis (Kheriji et al, 2015), and electrodialysis (Min et al, 2023). Of these, precipitation is particularly widely used due to its exceptional efficacy, easy operating process, and cost-effectiveness (Chen et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Efficient cadmium removal from industrial wastewater generated from smelter using chemical precipitation and oxidation assistance

Lee,

Min

et al. 2024

Water Environment Research

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The effective treatment of cadmium (Cd) in smelting wastewater is of great industrial importance. This study investigates the efficient removal of Cd from real industrial smelting wastewater via chemical precipitation using a series of experiments. In particular, the effects of different precipitants, agitation conditions, and the addition of NaOCl on Cd removal and pH variation are investigated. CaO (3.75 g/L), NaOH (3.50 g/L), and Ca(OH)2 (3.75 g/L) are found to be effective in elevating the wastewater pH and achieving high Cd removal rates (>99.9%), while the use of NaOH as a precipitant maintains a high Cd removal rate even at low agitation intensities. The properties of the produced sludge and supernatant are also determined using moisture content, particle size, and sludge leaching analyses due to the importance of economic and environmental sustainability in filtration, dewatering, and waste disposal processes. In addition, the addition of 2% NaOCl is tested, revealing that it can improve the Cd removal efficiency of Ca(OH)2, thus potentially reducing processing costs and enhancing the environmental benefits. Overall, these findings offer valuable insights into the removal of Cd from smelting wastewater, with potential implications for both environmental sustainability and economic viability.Practitioner Points CaO, NaOH, and Ca(OH)2 effectively remove Cd (>99.9%) from smelting wastewater. The use of NaOH leads to high Cd removal rates even at low agitation speeds. Adding 2% NaOCl can reduce the Ca(OH)2 dose for more economical Cd removal.

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Valorization of Fenton sludge by pyrolysis as a green adsorbent for arsenate removal

Cho,

Kyu‐Kang,

Lee

et al. 2023

Applied Organom Chemis

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Significant quantities of Fenton sludge (FS) are produced during the treatment of industrial wastewater from the plating industry because of the removal of residual organic matter and color‐causing substances. This study proposes repurposing waste FS as a valuable resource to contribute to environmentally favorable remediation initiatives. This study focuses on producing Fenton sludge biochar (FS‐BC), which effectively removes As(V) from wastewater and offers a sustainable solution for wastewater treatment. Different FS‐BC samples were produced at various pyrolysis temperatures (300–900 °C), with FS‐BC‐900 exhibiting the greatest As(V) adsorption capacity. As(V) removal was primarily mediated by electrostatic attraction with iron oxide, and adsorption via inner‐sphere complex formation, as revealed by the XPS analysis. FS‐BC‐900 had a remarkable maximum As(V) adsorption capacity of 148.7 mg/g (initial concentration: 100–900 mg/l; reaction time: 96 h; pH 7.86), surpassing many other adsorbents reported in the literature. FS‐BC‐900 also demonstrated a high As(V) removal percentage, with 6.67 g/l of FS‐BC‐900 removing 96.8% of the As(V). Notably, the adsorption of As(V) by FS‐BC‐900 was affected by certain factors, including pH and carbonate presence. High pH and carbonate inhibited the ability of FS‐BC‐900 to adsorb As(V). This study presents a novel method for utilizing FS to combat As(V)‐contaminated water‐induced environmental contamination. This study contributes to eco‐friendly and sustainable wastewater treatment and As(V) remediation strategies by transforming waste into valuable resources.

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Use of thermally activated Fenton sludge for Cd removal in zinc smelter wastewater: Mechanism and feasibility of Cd removal

Cited by 16 publications

References 104 publications

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Efficient cadmium removal from industrial wastewater generated from smelter using chemical precipitation and oxidation assistance

Valorization of Fenton sludge by pyrolysis as a green adsorbent for arsenate removal

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