A quantitative analysis of hydroxyl radical generation as H2O2 encounters siderite: Kinetics and effect of parameters

Sun, Fuwei; Chen, Tianhu; Li, Haibo; Chu, Ziyang; Shu, Daobing; Wang, Hanlin; Huang, Fangju; Chen, Dong

doi:10.1016/j.apgeochem.2021.104893

Cited by 15 publications

(5 citation statements)

References 70 publications

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“…S6). Further, 2,2‐bipyridine (BPY) was reported to have the ability to chelate with the aqueous Fe(II) and, thus, inhibit PDS activation by aqueous Fe(II) ions 26,27 . However, the addition of 1 mM BPY did not significantly affect SMT degradation.…”

Section: Resultsmentioning

confidence: 99%

Activation of peroxydisulfate by thermally‐treated natural siderite to degrade sulfamethazine: performance and mechanism

Sun

Wang

et al. 2023

J of Chemical Tech & Biotech

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Compared with synthetic materials, natural mineral materials have the advantages of low cost and easy availability. In the present study, magnetite was prepared by calcination of natural siderite under an N2 atmosphere and utilized as a heterogeneous material for sulfamethazine (SMT) degradation via peroxydisulfate (PDS) activation. Various characterizations demonstrated that the S600 (siderite calcinated at 600 °C for 1 h) had a high specific surface area (57.18 m2/g) and high electron transfer ability. Under 1 g/L S600 and 1 mM PDS, 99.9% and 50% of SMT (5 mg/L) and TOC were eliminated in 2 h, with a kinetic constant of 0.026 min−1. Increasing the S600 dosage and PDS concentration favored SMT degradation, while inorganic anions and natural organic matter had the opposite effect. Besides this, Electron spin resonance (ESR) analysis and scavenger experiment results demonstrated that hydroxyl radicals (about 62.3%) and sulfate radicals (about 20.2%) played a major role, while Fe(IV) (about 16.5%) played a minor role in SMT degradation. Moreover, various intermediates for SMT degradation were put forward based on the LC–MS/MS results and their toxicity was predicted to decrease. This work provides a vision for water treatment based on natural mineral materials and presents a new idea for the comprehensive utilization of siderite. © 2023 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

Activation of peroxydisulfate by thermally‐treated natural siderite to degrade sulfamethazine: performance and mechanism

Sun

Wang

et al. 2023

J of Chemical Tech & Biotech

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“…While these ROS might play a role in driving reactions or influencing the process, their presence can introduce complexities in terms of process control and environmental impact [34]. ROS, depending on their concentration and nature, can potentially affect the efficiency of the reaction and, in higher concentrations, may pose environmental risks due to their reactivity [35]. Therefore, the role of H 2 O 2 in this context is dual: it contributes to the oxidation of organic content, aligning with green objectives, yet it necessitates careful consideration due to its potential to generate reactive oxygen species, which can influence the process in diverse ways.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the role of H 2 O 2 in this context is dual: it contributes to the oxidation of organic content, aligning with green objectives, yet it necessitates careful consideration due to its potential to generate reactive oxygen species, which can influence the process in diverse ways. Balancing the positive effects of H 2 O 2 in organic content degradation with a comprehensive understanding and management of ROS formation becomes pivotal in assessing the overall "greenness" and environmental impact of the process [33,35]. Further exploration and discussion regarding the optimization and control of H 2 O 2 concentration, reaction conditions, and potential mitigating strategies for ROS formation could enhance the understanding of its impact within the context of eco-friendly processes [33][34][35].…”

Section: Methodsmentioning

confidence: 99%

“…Balancing the positive effects of H 2 O 2 in organic content degradation with a comprehensive understanding and management of ROS formation becomes pivotal in assessing the overall "greenness" and environmental impact of the process [33,35]. Further exploration and discussion regarding the optimization and control of H 2 O 2 concentration, reaction conditions, and potential mitigating strategies for ROS formation could enhance the understanding of its impact within the context of eco-friendly processes [33][34][35].…”

Section: Methodsmentioning

confidence: 99%

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Recovery of Cobalt, Nickel, and Lithium from Spent Lithium-Ion Batteries with Gluconic Acid Leaching Process: Kinetics Study

Gerold,

Lerchbammer,

Antrekowitsch

2024

Batteries

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The demand for lithium-ion batteries (LIBs) is driven by environmental concerns and market growth, particularly in the transportation sector. The EU’s push for net-zero emissions and the European Green Deal accentuates the role of battery technologies in sustainable energy supply. Organic acids, like gluconic acid, are explored for the eco-friendly leaching of valuable metals from spent batteries. This study investigates leaching kinetics using gluconic acid (hydrolyzed glucono-1.5-lacton), analyzing factors such as temperature, acid concentration, particle size, and reaction time. Results reveal the temperature’s influence on leaching efficiency for cobalt, nickel, and lithium. The mechanism for Co follows a surface chemical reaction model with an activation energy of 28.2 kJ·mol−1. Nickel, on the contrary, shows a diffusion-controlled regime and an activation energy of 70.1 kJ·mol−1. The reaction of leaching Ni and Co using gluconic acid was determined to be first-order. The process within this environmentally friendly alternative leaching agent shows great potential for sustainable metal recovery.

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“…Esses processos fundamentam-se na produção de radicais livres, com destaque para o radical hidroxil (•OH), o qual possui elevada capacidade oxidante, com potencial redox de 2,80 eV, ficando apenas atrás do flúor (2,87 eV) (MA et al 2021). O radical hidroxil reage sem seletividade com moléculas orgânicas com velocidades elevadas de reação e promove a degradação de contaminantes orgânicos, sejam eles biodegradáveis ou refratários (SUN et al, 2021;FIOREZE;SCHMACHTENBERG, 2014;SANZ;LOMBRAÑA;LUIS, 2013).…”

Section: Introdução Aos Proces-sos Oxidativos Avançadosunclassified

A Influência Das Vertentes Na Gestão Urbana

Bonifácio¹,

Nóbrega²

2021

Gestão Urbana Sustentável, Águas Urbanas

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O processo de urbanização desenfreada torna o meio físico vulnerável às ações antrópicas, e condiciona a vários problemas de ordem socioambientais. O excesso de superfícies impermeabilizadas, resultante do acelerado crescimento urbano, reduz a infiltração da água da precipitação e aumenta a velocidade do escoamento da água em superfície, neste sentido, provoca alterações morfológicas nas vertentes e no funcionamento dos fluxos hídricos superficiais e subsuperficiais. À medida que a impermeabilização produzida pela urbanização aumenta, as alterações são mais intensas e os riscos de degradação tornam-se mais críticos. O conhecimento da dinâmica das vertentes e dos efeitos da urbanização sobre ela, fornecem subsídios para um planejamento urbano sustentável.

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A quantitative analysis of hydroxyl radical generation as H2O2 encounters siderite: Kinetics and effect of parameters

Cited by 15 publications

References 70 publications

Activation of peroxydisulfate by thermally‐treated natural siderite to degrade sulfamethazine: performance and mechanism

Activation of peroxydisulfate by thermally‐treated natural siderite to degrade sulfamethazine: performance and mechanism

Recovery of Cobalt, Nickel, and Lithium from Spent Lithium-Ion Batteries with Gluconic Acid Leaching Process: Kinetics Study

A Influência Das Vertentes Na Gestão Urbana

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