Heterogeneous Fenton-like degradation of methoxychlor in water using two different FeS@hydrotalcites (LHDs) and Fe 3 O 4 @LHDs catalysts prepared via an in situ growth method

Huang, Yan; Yang, Yunxia; Wang, Xinxin; Xue, Yuan; Pi, Na; Yuan, Hongmin; Liu, Xiangnong; Ni, Chaoying

doi:10.1016/j.cej.2018.02.056

Cited by 39 publications

(5 citation statements)

References 33 publications

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“…[1][2][3][4] Thus, the remediation is probably one of the major challenges faced by researchers due to the dynamics between pollutants and medium as well as because some pesticides are persistent pollutants. [5] The removal of pesticides from media has been attempted by using different techniques including advanced oxidative processes (AOPs), [6][7][8][9][10] membranes technology, [11] soil washing [12,13] and the use of adsorbents, such as activated carbon [14] or biochar. [15] All these techniques have some drawbacks that are essentially related to the high energy cost, the formation of by-products (as it happens in, e. g., AOPs) and membrane fouling; in turn, activated carbon is cheap and highly efficient as adsorbent for pollutant removal, but its reuse is difficult and expensive.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Insights for Screening the Ability of Polymers to Remove Pesticides from Water

2019

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The use of pesticides in agriculture is known to have environmental impacts, namely it leads to underground and spring water contamination. Thus, it turns out that nowadays general‐endeavor towards the sustainability of farmer production requires novel strategies to capture pesticides from water and soils. We propose a methodology based on molecular dynamics simulations to identify polymers that are potentially featured to be applied for pesticide remediation in water and soils. We have employed cymoxanil (CYM), glufosinate ammonium (GLF), imidacloprid (IMI) and mancozeb (MAN) as pesticides, and have tested polymers with different characteristics as removing agents. Specifically, we have investigated oligomers of polypropylene (PP), poly(acrylic acid) protonated (PAAH) and deprotonated (PAA), and chitosan protonated (CTH) and deprotonated (CT). It has been found that all oligomers show a certain degree of selectivity concerning the interaction with the tested pesticides.

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Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Insights for Screening the Ability of Polymers to Remove Pesticides from Water

2019

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“…Fenton reaction is a process that uses the catalytic reaction of H 2 O 2 and Fe 2+ to rapidly generate highly reactive • OH radicals, which is widely used in the wastewater treatment [ 87 ]. The generation of • OH in the Fenton reaction is closely related to iron ions, and it has been shown that the incorporation of FeS and Fe 3 O 4 nanoparticles significantly enhanced the coupling of Fe 2+ and S − and the synergistic effect of FeS on the Fenton process accelerated the dechlorination and degradation of organochlorine compounds [ 88 ].…”

Section: Application Of Ldhs In Advanced Oxidation Processesmentioning

confidence: 99%

“…The generation of • OH in the Fenton reaction is closely related to iron ions, and it has been shown that the incorporation of FeS and Fe 3 O 4 nanoparticles significantly enhanced the coupling of Fe 2+ and S − and the synergistic effect of FeS on the Fenton process accelerated the dechlorination and degradation of organochlorine compounds [ 88 ]. Furthermore, Huang et al [ 87 ] obtained FeS@LDH and Fe 3 O 4 @LDH composites to catalyze the Fenton reaction for the degradation of methoxychlor. In the catalytic degradation process of Fe 3 O 4 @LDH, the reductive dechlorination, cleavage, and oxidation of methoxychlor occurred; while using FeS@LDH and Fe 3 O 4 @LDH hybrid catalysts, the hydrogenolysis and cleavage of methoxychlor occurred ( Figure 6 A).…”

Section: Application Of Ldhs In Advanced Oxidation Processesmentioning

confidence: 99%

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Recent Progress of Layered Double Hydroxide-Based Materials in Wastewater Treatment

Fu,

Song

et al. 2023

Materials

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Layered double hydroxides (LDHs) can be used as catalysts and adsorbents due to their high stability, safety, and reusability. The preparation of modified LDHs mainly includes coprecipitation, hydrothermal, ion exchange, calcination recovery, and sol–gel methods. LDH-based materials have high anion exchange capacity, good thermal stability, and a large specific surface area, which can effectively adsorb and remove heavy metal ions, inorganic anions, organic pollutants, and oil pollutants from wastewater. Additionally, they are heterogeneous catalysts and have excellent catalytic effect in the Fenton system, persulfate-based advanced oxidation processes, and electrocatalytic system. This review ends with a discussion of the challenges and future trends of the application of LDHs in wastewater treatment.

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“…Laipan等 [47] 用NiFe-LDH作前驱体, 进行煅烧, 所 LDHs, ③ H 2 O 2 +Fe 3 O 4 @LDHs+FeS@LDHs, ④ LDHs, ⑤ Fe 3 O 4 @LDHs, ⑥ H 2 O 2 +FeS@LDHs, ⑦ H 2 O 2 [45] (网络版彩图) 图 9 (a) LDH负载碳点催化芬顿反应机理示意图; (b) 产生的•OH的EPR谱 [46] (网络版彩图) Oladipo等 [48] 将CoNiFe-LDH煅烧成磁性复合物…”

Section: 水滑石作前驱体制备复合金属氧化物作为催化剂unclassified

Research progress of LDHs as Fenton reaction catalysts

Shao¹,

Han²,

Li³

et al. 2021

Sci. Sin.-Chim

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Fenton reaction utilizes the catalytic reaction of H 2 O 2 and Fe 2+ to generate highly active hydroxyl radicals (•OH) quickly to degrade organic compounds without the secondary pollution of by-products, which is widely used in the fields of environmental protection and sewage treatment. However, the difficulty of the regeneration of low-valence metals in the ordinary homogeneous Fenton reaction limits the efficiency of the overall reaction. In addition, the acidic requirements of the reaction system and the introduction of iron ions are not ideal from an environmental perspective. In recent years, layered double hydroxides (LDHs), as a unique layered material, have shown excellent catalytic performance in Fenton reaction and have attracted widespread attention. The active sites of LDHs are usually the metal ions fixed on the solid surface, which can avoid the leaching of metal ions and reduce the pH requirements of the reaction system. Besides, by adjusting the structure of the LDHs layers, a redox cycle of multiple metals can be formed, which promotes the regeneration of the low-valence metals effectively and thus improves the efficiency of the Fenton reaction. This review mainly summarizes the recent progress of LDHs materials as Fenton reaction catalysts. The challenge and prospective trends of LDHs materials as Fenton reaction catalysts are also discussed.

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Heterogeneous Fenton-like degradation of methoxychlor in water using two different FeS@hydrotalcites (LHDs) and Fe 3 O 4 @LHDs catalysts prepared via an in situ growth method

Cited by 39 publications

References 33 publications

Molecular Dynamics Insights for Screening the Ability of Polymers to Remove Pesticides from Water

Molecular Dynamics Insights for Screening the Ability of Polymers to Remove Pesticides from Water

Recent Progress of Layered Double Hydroxide-Based Materials in Wastewater Treatment

Research progress of LDHs as Fenton reaction catalysts

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