Performance of magnetite/layered double hydroxide composite for dye removal via adsorption, Fenton and photo-Fenton processes

Gonçalves, Rosembergue Gabriel Lima; Lopes, Paloma Aparecida; Resende, Júlia Alvarenga; Pinto, Francisco de Assis de Carvalho; Tronto, Jairo; Guerreiro, Mário César; Oliveira, Luiz C.A.; Nunes, Wallace C.; Neto, Jonas Leal

doi:10.1016/j.clay.2019.105152

Cited by 49 publications

(12 citation statements)

References 32 publications

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“…Also, (Gonçalves et al 2019) investigated the application of magnetite substituted on layered double hydroxide to degrade harmful dyes. Layered double hydroxides are two-dimensional materials with a lamellar structure.…”

Section: Photodegradation Performancementioning

confidence: 99%

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

et al. 2021

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The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.

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Section: Photodegradation Performancementioning

confidence: 99%

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

et al. 2021

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“…The surface precipitation with metal ions can be enhanced in the LDH due to availability of OH groups and the interlayer anions [ 22 ]. LDHs are a category of isostructural (2D) lamellar materials composed of brucite-like octahedral sheets with positive charges [ 23 , 24 , 25 , 26 ]. Magnesium/ferric-based LDH (MF-LDH) can be co-precipitated from Mg and Fe salts and are indeed very efficient and environmentally friendly sorbents/ion exchangers for anions in aqueous media [ 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

New Composite Sorbent for Removal of Sulfate Ions from Simulated and Real Groundwater in the Batch and Continuous Tests

et al. 2021

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The evaluation of groundwater quality in the Dammam formation, Faddak farm, Karbala Governorate, Iraq proved that the sulfate (SO42−) concentrations have high values; so, this water is not suitable for livestock, poultry and irrigation purposes. For reclamation of this water, manufacturing of new sorbent for permeable reactive barrier was required through precipitation of Mg and Fe hydroxides nanoparticles on the activated carbon (AC) surface with best Mg/Fe molar ratio of 7.5/2.5. Mixture of 50% coated AC and 50% scrap iron was applied to eliminate SO42− from contaminated water with efficiency of 59% and maximum capacity of adsorption equals to 9.5 mg/g for a time period of 1 h, sorbent dosage 40 g/L, and initial pH = 5 at 50 mg/L initial SO42− concentration and 200 rpm shaking speed. Characterization analyses certified that the plantation of Mg and Fe nanoparticles onto AC was achieved. Continuous tests showed that the longevity of composite sorbent is increased with thicker bed and lower influent concentration and flow rate. Computer solution (COMSOL) software was well simulated for continuous measurements. The reclamation of real contaminated groundwater was achieved in column set-up with efficiency of 70% when flow rate was 5 mL/min, bed depth was 50 cm and inlet SO42− concentration was 2301 mg/L.

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“…Das aplicações mais conhecidas, as Fe-NPs têm sido utilizadas no tratamento de águas e solo contaminados. Atuam como adsorventes de metais pesados e catalisadores eficientes de poluentes orgânicos, usando ozônio ou peróxido de hidrogênio em escala de laboratório (OLIVEIRA et al, 2016;SANTOS et al, 2018;GONÇALVES et al, 2019). Poluentes orgânicos, como hidrocarbonetos policíclicos aromáticos, inseticidas e vários compostos orgânicos halogenados, podem ser degradados por meio de processos de oxidação/redução com essas NPs.…”

Section: Introductionunclassified

Ecotoxicidade de nanocatalisadores de óxidos de ferro, produzidos a partir da drenagem ácida de mina, quando submetidos à ação de ozônio em meio aquoso

Rauen

Scaratti

Geremias

et al. 2021

Eng. Sanit. Ambient.

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RESUMO Óxidos de ferro recuperados da drenagem ácida de minas representam uma matéria-prima potencial para a produção de baixo custo de nanogoetita ou nanohematita, com grau de pureza adequado para o seu uso como catalisador em processos de tratamento de efluentes líquidos com ozônio. Assim, a toxicidade das nanopartículas de ferro precisa ser determinada para prever seu impacto no meio ambiente, antes e depois de terem sido utilizadas nesses processos. Nesse contexto, o objetivo deste estudo foi avaliar a toxicidade de nanogoetita e nanohematita produzidas a partir da drenagem ácida de minas bem como comparar os resultados com hematita sintética de alta pureza. A nanogoetita foi obtida da drenagem ácida de minas e, após seu tratamento térmico a 450°C, produziu nanopartículas de hematita. Os materiais foram caracterizados por difração de raios X, microscopia eletrônica de transmissão e determinação da área superficial específica e porosidade com base nas isotermas de adsorção/dessorção de N2. Foram realizados os ensaios de ecotoxicidade usando os protocolos padronizados para bioluminescência com Vibrio fischeri, letalidade da Artemia sp., germinação de sementes de Lactuca sativa L. (alface) e crescimento das raízes de Allium cepa L. (cebola). Os resultados de toxicidade indicaram estabilidade das nanopartículas, que não são alteradas significativamente pela ação do ozônio em meio aquoso. Para todas as amostras, os valores indicaram baixa ou nenhuma toxicidade nas condições dos experimentos, para os bioindicadores utilizados. Esses resultados fornecem indicação de que as nanopartículas de ferro recuperadas da indústria de resíduos podem ser usadas como catalisadores sem efeitos adversos ao meio ambiente.

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Performance of magnetite/layered double hydroxide composite for dye removal via adsorption, Fenton and photo-Fenton processes

Cited by 49 publications

References 32 publications

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

New Composite Sorbent for Removal of Sulfate Ions from Simulated and Real Groundwater in the Batch and Continuous Tests

Ecotoxicidade de nanocatalisadores de óxidos de ferro, produzidos a partir da drenagem ácida de mina, quando submetidos à ação de ozônio em meio aquoso

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