APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Peng Zhou,Yangyang Yang,Wei Ren,Xiaojie Li,Yongli Zhang,Bo Lai,Shaobin Wang,Xiaoguang Duan
In this work, crystalline boron is applied as a green co-catalyst to accelerate the redox processes in the Fe(III)/PMS(peroxymonosulfate) system. The semi-metallic B-B bonds in the icosahedra B 12 unit of boron will donate electrons to reduce Fe(III) to initiate Fenton-like PMS activation to generate hydroxyl radical (•OH), sulfate radical (SO 4 •− ) and high-valence Fe(IV). Meanwhile, surface boron can directly cleave the peroxide O-O bonds of PMS molecules to produce •OH. The contributions of radical and Fe(IV) can be regulated by Fe(III) dosage, and parallel radical and nonradical oxidation will enable non-selective degradation of diverse organic contaminants with high PMS utilization efficiency. Moreover, Fe(III) accelerates the self-clean of boron surface and secures continuous exposure of active sites. Spontaneously, boron experiences stepwise oxidation and hydrolysis into soluble products without generating toxins. The novel Boron/Fe(III)/PMS system overcomes the rate-limiting step in Fenton chemistry and realizes exceptional efficiency and stability in long-term operations.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Zhouwei Miao,Xiaogang Gu,Shuguang Lu,Mark L. Brusseau,Xiang Zhang,Xiaori Fu,Muhammad Danish,Zhaofu Qiu,Qian Sui
The performance of Fe(III)-based catalyzed sodium percarbonate (SPC) for stimulating the oxidation of tetrachloroethene (PCE) for groundwater remediation applications was investigated. The chelating agents citric acid monohydrate (CIT), oxalic acid (OA), and glutamic acid (Glu) significantly enhanced the degradation of PCE. Conversely, ethylenediaminetetraacetic acid (EDTA) had a negative impact on PCE degradation, which may due to its strong Fe chelation and HO scavenging abilities. However, excessive SPC or chelating agent will retard PCE degradation. In addition, investigations using free radical probe compounds and radical scavengers revealed that PCE was primarily degraded by HO radical oxidation in both the chelated and non-chelated systems, while O 2 − also participated in the non-chelated system and the OA and Glu modified systems. According to the electron paramagnetic resonance (EPR) studies, the presence of HO in the Fe(III)/SPC system was maintained much longer than that in the Fe(II)/SPC system. The results indicated that the addition of CIT, OA or Glu indeed enhanced the generation of HO in the first 10 min and promoted degradation efficiency by increasing the amount of Fe(III) and maintaining the concentration of HO radicals in solution. In conclusion, chelated Fe(III)-based catalyzed SPC oxidation is a promising method for the remediation of PCE-contaminated groundwater.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Tong Liu,Zhican Xie,Peng Zhou,Zhaokun Xiong,Heng Zhang,Zhicheng Pan,Yang Liu,Bo Lai
Transition metal activation of sulfite (S(IV)) is a promising wastewater treatment technology . In this study, the activation of potassium pyrosulfite (PPS) with ferric iron (Fe 3+ ) is proposed firstly to degrade carbamazepine (CBZ). PPS has the advantages of low cost, non-toxicity and acidic solution, which makes it unnecessary to adjust the pH. The results showed that the Fe 3+ cycle was realized during the reaction process, and the degradation trend of CBZ was consistent with the formation rate of Fe 2+ and the decay rate of S(IV). Moreover, oxygen (O 2 ) plays a decisive role in the system and was the initiator of free radical chain reactions. The existence of sulfite radical (SO 3 •− ), sulfate radical (SO 4 •− ) and hydroxyl radicals (HO • ) in Fe 3+ /PPS system was proved by electron paramagnetic resonance (EPR), quenching experiments and terephthalic acid (TA) photoluminescence probing technique. The contribution of SO 4 •− and OH • to the removal of CBZ in Fe 3+ /PPS system is 64% and 35%, respectively. In addition, intermediates of CBZ were identified by Liquid Chromatography–Tandem Mass Spectrometry (LC–MS/MS) and possible removal pathways were also proposed. Finally, the effects of PPS concentration, Fe 3+ concentration, initial pH, anions and humic acid (HA) were also investigated.
研究领域:
环境科学
·
废水处理技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Zhihao Shen,Shuming Wen,Yongchao Miao,Han Wang,Qicheng Feng
Unavoidable metal ions commonly exist in the pulp during flotation. These ions can affect the floatability of minerals, and they can also result in the differences in the surface features between different minerals. In this study, how Fe 3+ affected the flotation behavior of cerussite was investigated by micro-flotation tests. The corresponding adsorption characteristics of the sulfidizing agent and collector on the surfaces of cerussite were investigated by surface-analysis techniques. The results of micro-flotation tests showed that the floatability of cerussite significantly decreased when Fe 3+ was added before Na 2 S and xanthate. The flotation recovery of cerussite decreased compared with that obtained without participation of Fe 3+ . Additionally, the results of xanthate and Na 2 S adsorption tests, X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS) and zeta potential measurements verified that Fe 3+ and its hydrophilic hydroxyl derivatives (Fe-OH compounds) resulted in reduced amounts and reactive activities of S-bearing species adsorbed on the surfaces of cerussite. This decreased the adsorption capacity of subsequently added xanthate, resulting in the difficulty in effectively recovering cerussite in the sulfidization-xanthate system.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Mengyu Lin,Jialiang Zhang,Chengjun Xu,Yongqiang Chen,Chengyan Wang
Recycling of spent lithium-ion batteries (LIBs) has become urgently imperative to address global environmental issues and achieve sustainable development of new energy industries. Prioritizing lithium and aluminum leaching is an ideal path for recovering lithium efficiently from spent LFP and preparing high-purity battery-grade FePO 4 . Here, a novel ferric ions-assisted air oxidation method was proposed for the simultaneous leaching of Li and Al. Fe 3+ was ingeniously introduced playing two roles: acting as a catalyst for air oxidation and leaching aluminum. 98.8% Li and 95.2% Al are selectively leached under optimal conditions. The thermodynamic analysis indicated that the displacement reaction between Al and Fe 3+ dominates the leaching of Al. Furthermore, Cl − can promote the leaching of Al by forming a stable complex [AlCl 4 ] − with Al 3+ . The reaction course and mechanism were clarified by various characterizations, which indicate that the successful selective leaching of lithium does not destroy the original structure of LFP and the presence of carbon coatings. A cycling process was proposed for enriching the Li + concentration and reusing Fe 3+ , and then Li 2 CO 3 with a purity of 99wt.% was successfully prepared. This method demonstrates excellent economic efficiency and environmental friendliness, thus providing a sustainable and low-carbon recycling route for the spent LFP industry.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Gilsang Hong,Hyojeong Nam,Levie Mweene,Hyunjung Kim
Flotation of goethite, a representative mineral of laterite ore, which is essential source of nickel used in secondary batteries, was conducted using salicylhydroxamic acid as the collector. The presence of ferric ions derived from goethite in the pulp resulted in an increased consumption of the collector during flotation. Following three washing stages, the maximum recovery of 98.5 wt% was achieved with a collector dosage of only 60 % in the absence of a washing stage. The oxalic acid is employed to eliminate ferric ions via precipitation without the requirement for supplementary water, energy, and time-consuming washing stages. The utilization of 40 g⋅t −1 of oxalic acid yielded comparable recovery outcomes to those observed in the three washing stages. Furthermore, theoretical investigations were conducted to determine the collector species influencing goethite flotation with density functional theory. It was observed that compared with that of goethite with non-ionized salicylhydroxamic acid complex, the complexation energy for goethite with ionized salicylhydroxamic acid was lower by 113.9 kJ⋅mol −1 , indicating that the optimum adsorption onto the mineral surface strongly depends on ionized salicylhydroxamic acid species. This study presents a potential method for reduction of reagent consumption in the flotation of future complex laterite ore, an acidic soil in which metal ions might be present. Additionally, the theoretical framework elucidates the complexation of collectors to minerals that are challenging to quantify experimentally.
研究领域:
矿物加工工程
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Chemical Neuroscience
·
2019
·
IF 3.861
Lu Kou,Yuemei Duan,Pengcheng Wang,Yaru Fu,Nerek Darabedian,Yonghui He,Dianlu Jiang,Dinglong Chen,Juan Xiang,Guokun Liu,Feimeng Zhou
The aberrant autoxidation of norepinephrine (NE) in the presence of oxygen, which is accelerated by Fe(III), has been linked to the pathogenesis of the Parkinson’s disease (PD). Adenosine triphosphate (ATP), as a neurotransmitter whose release can be stimulated by tissue damage and oxidative stress, is co-stored and often co-released with NE in presynaptic terminals. We have shown previously that ATP inhibits the iron-catalyzed dopamine oxidation, thereby decreasing the production of certain neurotoxins such as 6-hydroxydopamine. Whether ATP plays a similar role in Fe(III)-catalyzed NE oxidation and how it maintains the NE stability have not been investigated. Here, we studied the coordination in a ternary complex among NE, Fe(III), and ATP, and found that Fe(III) is coordinated as a octahedral center by NE and ATP. Voltammetry and mass spectrometry were employed to examine this ternary complex’s modulation of the NE autoxidation. NE–Fe(III)–ATP plays a protective role to modulate the autoxidation and Fe(III)-catalyzed oxidation of NE. The ternary complex can be detected in the substantia nigra (SN), locus coeruleus (LC), and striatum regions of C57BL/6 wild-type mice. In contrast, the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD mouse brains displayed a significant decrease of the ternary complex in the SN region and an increase in the LC and striatum areas. We posit that the ternary complex is produced by noradrenergic neurons as a protective regulator against neuronal damage and oxidative stress, contributing to the lower vulnerability of LC neurons with respect to that of SN neurons.
研究领域:
神经科学
·
医学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Liu Renlan,Zhu Xiaoying,Chen Baoliang
Graphene oxide (GO) contains not only aromatic carbon lattice but also carboxyl groups which enhanced the aqueous solubility of GO. To study the transformation of GO nanosheets in natural environments, GO aqueous dispersion was mixed with Fe 3+ ions to form photoactive complex. Under visible light irradiation, Fe(III) of the complex would be reduced to Fe(II) which could subsequently reduce highly toxic Cr(VI) to Cr 3+ . The electron of the reduction was contributed by the decarboxylation of carboxyl groups on GO and iron was acting as a catalyst during the photoreduction. On the other hand, the consumption of carboxyl groups may convert GO to rGO which are tend to aggregate since the decreased electrostatic repulsion and the increased π-π attraction. The formed Cr 3+ may be electrostatically adsorbed by the rGO sheets and simultaneously precipitated with the aggregated rGO sheets, resulting the effective removal of chromium and GO nanosheets from the aqueous environment. This study may shed a light on understanding the environmental transformation of GO and guide the treatment of Cr(VI).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Yongsheng Lu,Xingxing Yang,Lu Xu,Zhan Wang,Yunfeng Xu,Guangren Qian
The Fe3+/persulfate system for Rhodamine B (RhB) oxidative degradation has been investigated. The catalytic mechanism in the Fe3+/persulfate system was proposed as follows: Fe3+ was restored to Fe2+ by the generated intermediate products during the degradation process. The influence parameters were examined in batch experiments, including Fe3+ and persulfate concentration and initial pH. The results indicated that the Fe3+/persulfate system exhibited good performance for RhB degradation and followed first-order kinetics. 95.91% of the RhB was removed within 30 min under the following conditions: [Fe3+]0 = 1 mM, [persulfate]0 = 1 mM and pH 3.0. The RhB degradation efficiencies increased as the Fe3+ and persulfate concentrations increased. In addition, the RhB degradation was inhibited in the presence of inorganic anions, which was primarily due to a complex reaction between Fe3+ and various anions except for .
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Qiang Zhao,Dandan Li,Guofeng Gao,Wen Yuan,Genyan Hao,Jinping Li
We describe a novel nanostructured iron oxide catalyst film electrodeposited from iron(II) triflate under mild conditions (room temperature, atmospheric pressure, and near-neutral solution) that can catalyze water oxidation in potassium carbonate solution. The structure, morphology, composition, and catalytic activity of the catalyst were characterized by X-ray diffractometry, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical measurements. The results indicate that nanostructured iron oxide is an active electrocatalyst for water oxidation at higher catalytic current and low overpotential.
研究领域:
无机化学
·
材料科学
·
电化学
·
能源化学
·
纳米科技
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2024
·
IF 2.2
Yiqing Liu,Linghan Xu,Xin Li,Shixiang Wang
Ascorbic acid (AA) was used as a reducing agent to improve the Fe(III)-activated peracetic acid (PAA) system for the removal of sulfamethoxazole (SMX) in this work. The efficiency, influencing factors and mechanism of SMX elimination in the AA/Fe(III)/PAA process were studied. The results exhibited that AA facilitated the reduction of Fe(III) to Fe(II) and subsequently improved the activation of PAA and H2O2. Various radicals, including organic radicals (e.g. CH3C(O)O• and CH3C(O)OO•) and hydroxyl radical (HO•), were rapidly formed from the activated PAA and H2O2, resulting in SMX removal. Increasing dosages of PAA and Fe(III) contributed to enhanced SMX degradation, while excessive PAA and Fe(III) did not further promote SMX degradation. Due to the radicals' quenching effect, excess AA hindered SMX elimination in the AA/Fe(III)/PAA process. The presence of HCO3− and Cl− inhibited SMX removal in this system, whereas NO3−, SO42− and natural organic matter had little impact on SMX degradation. The transformation pathways of SMX in the AA/Fe(III)/PAA system included hydroxylation, bond cleavage and amino oxidation. This research provides a strategy to enhance the Fe(III)-activated PAA system for the elimination of refractory organic pollutants.
研究领域:
环境科学
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Tingting Zhang,Di Wu,Zhenlei Wang,Guangsen Song,Guozhi Fan,Xinyu Cai,Yunliang Zhao
Excess phosphorus (P) in surface water poses a serious threat to ecological safety. However, current methods for effectively removing low concentrations of phosphorus are complicated and expensive. Herein, we used one-step mechanical activation to enhance the release of alkalinity from carbonates and to stimulate ferrous activity in situ, thus achieving efficient and stable removal of phosphorus at low concentrations. The resultant activated FeCO 3 was demonstrated to be a high-performance material, which can remove more than 92 % of the actual low concentration of phosphorus pollution within 30 min, and the concentration of the effluent steadily met the requirements of Chinese Class I environmental quality standards for surface water (0.02 mg/L). In addition, mechanistic investigation showed that mechanical activation significantly enhanced the reactivity and phosphorus removal performance of MgCO 3 . Moreover, one-step mechanical activation simultaneously stimulates the release of alkaline and ferrous ionic groups from iron-rich FeCO 3 , which can produce highly active trivalent iron oxides in situ, leading to efficient and stable phosphorus removal at low concentrations. The present work provides a new insight and direction for developing high-performance materials to remediate low concentration phosphorus polluted waters.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）