SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Yan Li,Liangmin Gao,Yu Wang,Shuo Cheng,Guowei Wu,Xuan Yang,Shunli Wan
Biochar-supported metallic oxides are attractive adsorbents for heavy metal cleanup, but the adsorption performance is still unsatisfactory as a result of the self-aggregation of the incorporated metallic oxides. A new hybrid nano-material was prepared through impregnating hydrated ferric oxide (HFO) nanoparticles within biochar bearing high-density charged oxygen-containing groups (e.g., carboxyl and hydroxyl groups) (ABC) derived from HNO 3 treatment. The as-made adsorbent, denoted as HFO-ABC, possesses highly dispersed HFO nanoparticles with typical size lower than 20 nm, and exhibits greater sorption capacity for Cd(II) and Cu(II) than the pristine biochar-supported HFO. It also shows great sorption preference toward Cd(II) and Cu(II) in co-presence of high levels of Ca 2+ , Mg 2+ and humic acid (HA). Such prominent performance is put down to the high-density charged functional groups on the host ABC, which not only promote the dispersion of the immobilized HFO nanoparticles but also generate the potential Donnan membrane effect, i.e., the pre-concentration and permeation of target metals prior to their preferable adsorption by nano-HFO. The predicted effective coefficients of intra-particle diffusion for Cu(II) and Cd(II) are 3.83 × 10 −9 and 4.33 × 10 −9 cm 2 /s, respectively. HFO-ABC exhibits excellent performance for fixed-bed column application, and yields 513 and 990 BV effluents for Cd(II) and Cu(II) to achieve their discharge standards, respectively. The spent HFO-ABC could be in situ regenerated using binary HCl-CaCl 2 solution with desorption efficiency higher than 95%. All results manifest that increasing charged functional groups via HNO 3 treatment is an effective measure for boosting sorption performance of biochar-based nanocomposites.
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DOI
PubMed
高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Kai Wei,Xiufan Liu,Shiyu Cao,Huijuan Cui,Yu Zhang,Zhihui Ai
In this study, we fabricated a micro-nano structured Fe 2 O 3 @FeB composites by treating commercial Fe 2 O 3 with sodium borohydride. The outside amorphous FeB alloy shell endowed the Fe 2 O 3 @FeB with remarkable Fenton-like performance in organic pollutants oxidation by efficient Fe(III)/Fe(II) cycle. For instance, the pseudo first-order rate constants of RhB degradation using Fe 2 O 3 @FeB as Fenton reagent was 74.6 times that of the Fe 2 O 3 counterpart, the hydroxyl radical generation rate of Fe 2 O 3 @FeB was 1-3 orders of magnitude larger than that of other heterogeneous Fenton reagent. Further mechanistic study unveiled that FeB was oxidized accompanying with Fe(0) and B(0) continuously donated electrons to Fe(III) to secure the efficient generation of surface Fe(II), which could generate additional H 2 O 2 by consecutive single-electron molecular oxygen activation (O 2 →•O 2 − →H 2 O 2 ), leading to enhance •OH production and Fenton-degradation toward typical pollutants. This study provides a facile route for efficient heterogeneous Fenton and strengthens the vital role of molecular oxygen activation on Fenton-like process.
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DOI
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Fei Miao,Zehao Liu,Xin Kang,Cheng Cheng,Xiaoyu Mao,Ruimeng Li,Heng Lin,Hui Zhang
Heterogeneous catalytic oxidation based on iron species for peroxymonosulfate (PMS) activation is considered as one of the most attractive strategies for wastewater treatment. However, the rate-limiting regeneration of Fe(II) from Fe(III) heavily hampers the efficient activation of PMS. In this study, the introduction of electric field to the Fe-supported bentonite (Fe-B) activated PMS process was proposed to enhance the Fe(III)/Fe(II) redox cycle. The Fe-B catalyst performed well in the removal of Acid Orange 7 (AO7) through the synergistic effect of electrolysis and the continuous redox cycle of Fe(III)/Fe(II) for PMS activation. The use of 0.5 g L −1 Fe-B catalyst and 10 mM PMS yielded nearly complete removal of the AO7 (50 mg L −1 ) in 60 min at 2 mA cm −2 of current density. Based on the results of electron paramagnetic resonance (EPR) spectroscopy, chemical quenching tests, X-ray photoelectron spectroscopy (XPS) analysis, and electrochemical measurements, the decolorization of AO7 was dominantly attributed to surface-bound radicals (SO 4 •− ads and • OH ads ) and also the direct electron transfer at DSA anode. Moreover, the electro/Fe-B/PMS system showed an effective pH range from 2.6 to 9.0 and the abatement of AO7 was slightly affected in the presence of natural background anions. This work provides a feasible strategy of PMS activation by cost-effective Fe-B catalyst coupling with electric field and gives an insight into the accelerated oxidation of recalcitrant pollutants.
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CHEMOSPHERE
·
2021
·
IF 7.086
Fangru He,Hejun Ren,Tingting Li,Shuai Liu,Rui Zhou
This work demonstrated a novel N , N -bis(carboxymethyl)glutamic acid (GLDA) modified visible (vis) light assisted Fenton–like system which could effectively removal ciprofloxacin (CIP) at neutral pH. The removal rate of CIP in the GLDA/Fe(III)/H 2 O 2 /vis system was 97.9% within 120 min and was approximately twice as high as that in the Fe(III)/H 2 O 2 /vis system. GLDA could significantly accelerate the Fe(III)/Fe(II) cycle under visible light irradiation. Radical scavenging experiments demonstrated that 74.2% of the Fe(II) in the GLDA/Fe(III)/H 2 O 2 /vis system originated from the ligand–to–metal charge transfer reaction between Fe(III) and GLDA. The hydroxyl radical was the dominant species for CIP degradation. H 2 O 2 utilization kinetic modeling exhibited that 90.1% of H 2 O 2 was used for CIP mineralization. The effects of experimental parameters and coexisting substances on the removal of CIP in the Fe(III)/GLDA/H 2 O 2 /vis system were investigated in detail. The intermediate products of CIP were explored via the high–performance liquid chromatography-mass spectrometry.
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高影响因子
DESALINATION
·
2026
·
IF 9.9
Weiwei Wang,Yiyao Xu,Changchen Wu,Zhiwei Chen,Zhe Xu,Guangze Nie
A single-step displacement–capture strategy enables efficient separation of Ni(II)–citrate complexes. • High-spin Fe(III)-D001 composites efficiently decomplex Ni(II)–citrate and simultaneously recover Ni(II). • The strong complexation ability of high-spin Fe 3+ with citrate ligands is crucial for the decomplexation of Ni(II)–citrate. • Fe(III)-D001 exhibits effective decomplexation and Ni recovery in real wastewater. Heavy metal–ligand complex wastewaters pose persistent challenges for industrial water treatment and separation processes, as strong chelation by organic ligands severely limits the effectiveness of conventional adsorption and ion-exchange methods. Herein, we develop a single-step, regenerable separation strategy that integrates Fe(III)-driven metal displacement with ion-exchange capture for the efficient decomplexation of nickel–citrate complexes (Ni(II)–citrate) and simultaneous recovery of Ni(II). Fe(III)-functionalized cation-exchange resins (Fe(III)-D001) enriched with high-spin Fe(III) species were synthesized via a continuous ion-exchange process in aqueous solution. The resulting material exhibited effective removal of Ni(II)–citrate, achieving a maximum capacity of 87.74 mg g −1 . In contrast, Fe(III)-modified resins prepared in dimethylformamide, which predominantly contain low-spin Fe(III), showed markedly reduced removal performance. Mechanistic investigations reveal that high-spin Fe(III) acts as the displacement-active center, preferentially coordinating with citrate ligands and promoting the decomplexation of Ni(II)–citrate, while residual sulfonic acid groups on the resin enable the immediate capture of liberated Ni(II) via ion exchange. Fixed-bed operation further demonstrates stable separation performance under ion-rich conditions, highlighting the practical applicability of the proposed approach. This work provides a process-intensified route for treating chelated metal wastewaters and offers a promising separation strategy for complex industrial water matrices relevant to desalination and advanced wastewater treatment applications. Download: Download high-res image (271KB) Download: Download full-size image
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122892
·
IF 7.5
Chengbin Zhong,Junxia Yu,Boxi Wu,Qingbiao Zhao,Kairui Zhou,Jia Wang,Li Guo,Ruan Chi,Zhen Luo,Xiang Zhang
Iron, a prevalent impurity in dechroming sludge (DCS), poses a major challenge to the recovery and purification of valuable metals such as Cu, Ni, and Zn in wet processing. There is an urgent need for an efficient and selective iron separation technique that minimizes the loss of Cu, Ni, and Zn. In this study, an innovative combined approach of acid leaching and on-line adsorption was developed to selectively recover Fe 3 + from DCS. Results indicated that acid leaching with 0.05 mol/L H 2 SO 4 achieved extraction efficiencies of 98.2% for Fe 3+ , 99.0% for Cu 2+ , 94.6% for Ni 2+ , and 96.5% for Zn 2+ , yielding a leachate containing approximately 93.5 mg/L Fe 3+ . A phosphonic acid-functionalized resin (X-Fe resin) was then used to selectively remove Fe 3+ from the leachate. Batch adsorption experiments demonstrated higher adsorption capacity, rapid kinetics, and good reusability of the resin. Dynamic adsorption tests in the unitary, binary, and ternary systems revealed an affinity order of Fe 3+ >Cu 2+ >Zn 2+ >Ni 2+ , with competitive substitution favoring selective Fe 3+ uptake. EDS-mapping (Energy-Dispersive X-ray Spectroscopy mapping), XPS (X-ray Photoelectron Spectroscopy), and DFT (Density Functional Theory) analysis demonstrated that the high adsorption affinity was due to the more negative binding energy between Fe 3+ and the resin. When treating the DCS, the dynamic on-line adsorption process efficiently recovered of 95.3% of Fe 3 ⁺, and the final effluent had less than 5.0 mg/L Fe, meeting the requirements for industrial production standards. This work focuses on an innovative combination process of acid leaching and selective adsorption for iron removal, which offers a sustainable route for purification and resource recovery in a hydrometallurgical process.
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高影响因子
RSC Advances
·
2026
·Vol. 16
·期 33
·30145-30157
·
IF 6.1
Mingchen Zhang,Wei Zhao,Yang Zhou,Ruiting Shen,Yiqiong Sun,Lei Jiang,Jiantao Zhang
Diabetic wounds are a serious and increasingly prevalent complication in patients with diabetes, characterized by impaired skin regeneration. A major challenge for effective healing is recurrent bacterial infection, which often resists conventional treatment strategies. In this study, we grafted polymyxin B onto hyaluronic acid and employed Fe3+–EDTA as a cross-linking agent to fabricate HA-B@Fe hydrogels via ionic interactions. Based on the reversible and dynamic coordination between Fe3+ ions and the carboxyl groups of the hyaluronic acid, the resulting hydrogels exhibited shear-thinning behavior and excellent injectability. Based on the combined effects of polymyxin B and Fe3+, the HA-B@Fe hydrogel exhibited potent antimicrobial activity against a broad spectrum of bacteria, achieving >99% bactericidal rates against Escherichia coli (E. coli) and >94% against Staphylococcus aureus (S. aureus). In addition, the HA-B@Fe hydrogel demonstrated great biocompatibility, and showed significant therapeutic efficacy in a diabetic mouse wound model. The mice treated with HA-B@Fe showed a marked reduction in wound size (down to 19%), compared to a residual wound size of 32% in group treated with commercial dressings at day 7. Histopathological analysis further confirmed that HA-B@Fe treatment promoted epidermal regeneration and collagen fiber deposition, suggesting its potential as a promiseing strategy for the clinical treatment of diabetic wounds.
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高影响因子
International Journal of Environmental Research
·
2026
·Vol. 20
·期 6
·269
·
IF 4.3
Liu Yiqing,Hu Hong,Chen Chuanzeng,Zou Qinghua,Ruan Zhitian,Tang Lun
To resolve two main drawbacks of Fe(II/III)/peroxydisulfate (PDS) system, i.e., sluggish Fe(II) regeneration and strongly acidic operating environment, hydroxylamine (HAm) and nitrilotriacetic acid (NTA) were introduced simultaneously to Fe(III)/PDS system to degrade orange G (OG) under neutral condition in this study. The results shown that Fe(III)-NTA/HAm/PDS system could effectively remove OG at pH 7.0 and the removal ratio of OG reached 86.4% in 15 min. In this system, Fe(III)/Fe(II) could complex with NTA to improve their solubility, leading to the broadening of pH application range from acidic condition to weakly alkaline circumstance (pH 3–9) and the decrease of iron sludge production; HAm could drive Fe(III)/Fe(II) cycle via reducing Fe(III) to Fe(II), ensuring the sustainability of catalytic reaction and lowering the Fe(III) dosage. Sulfate radical (SO 4 ·− ) and hydroxyl radical (HO·) mainly contribute to OG degradation in Fe(III)-NTA/HAm/PDS process. The increase of reagents dosage could accelerate the removal of OG, while excess HAm (> 1 mM) and NTA (> 25 µM) could depress OG degradation because of their competition with OG for active radicals. The existence of Cl − (0.5–5 mM) could slightly promote the removal of OG, but HCO 3 − (0.5-5–mM) and fulvic acid (2–10 mg L − 1 ) obviously suppressed OG degradation. This research offers a strategy to extend the pH application range of Fe(II/III)/PDS process with low Fe dosage and a technique to remove OG from contaminated water. Graphical abstract
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高影响因子
Journal of Hazardous Materials Letters
·
2026
·
IF 8.1
Jibo Dou,Yichao Xu,Yunfei He,Ruoru Xu,Yao Yue,Feifei Chen,Yuchi Zhong,Xuetong Qu,Jiafeng Ding,Hangjun Zhang
Fe-doped carbon matrices have garnered significant attention as peroxymonosulfate (PMS) activators for the removal of refractory organic pollutants. However, the role of Fe dopant in PMS activation remains unclear, especially concerning the relative contributions and reaction pathways of high-valent iron oxidations. In this study, a series of Fe-doped carbon nitride (CN) catalysts with varying iron contents was synthesized and utilized for the catalytic degradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Results showed that Fe doping significantly enhanced PMS activation, with the highest TCDD degradation rate achieved by Fe-CN-3, exhibiting a 4.6-fold improvement. Quenching experiment revealed that increasing Fe content shifted the degradation mechanism from a radical-dominated process (76.1%) to a Fe V =O-driven nonradical pathway (55.8%); consequently, the Fe-CN-3/PMS system exhibited significant resistance to common environmental interferents. Theoretical calculations further confirmed that the Fe(III)-PMS interaction weakened both the O 2 -O 3 and O 3 -H bonds, thereby enabling their thermodynamically feasible cleavage and the subsequent generation of Fe V =O via a coupled electron-proton transfer pathway, which ultimately enhanced the electrophilic σ-attack on TCDD. These findings highlight the criticality of the metal dopant's local coordination environment in steering persulfate activation pathways, guiding the rational design of catalysts for selective oxidant generation.
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产品关联
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高影响因子
TETRAHEDRON
·
2011
·Vol. 67
·期 41
·7909-7912
·
IF 3.011
Wei Lu,Han Jiang,Fangyu Hu,Liming Jiang,Zhiquan Shen
A novel fluorogenic receptor 1 was prepared by the reaction of thiosemicarbazide with 1-naphthaldehyde. Based on in situ-formed 1 –Fe(III) complexes having the specific binding affinity for F − anions, this sensory system allows rapid recognition and quantitative detection of fluoride in neutral aqueous media in an ‘off–on’ fashion. The fluoride measurement method not only exhibits a low detection limit but also has strong anti-interference ability to common coexisting ions, as evidenced by competitive experiments.
研究领域:
分析化学
·
超分子化学
·
传感器与生物传感器
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.7
Sufang Zhao,Xuezhe Wen,Renju Liu,Bin Zhi,Xingyi Ma,Zongze Shao
Coagulation has proven effective in removing microplastics (MPs) from water, yet existing studies indicate that using coagulants alone often yields unsatisfactory results. Therefore, developing sustainable flocculation technologies is crucial for efficient microplastic removal. In this study, microbial flocculants originated from algal extracellular organic matter (EOM) were used to enhance the effectiveness of the traditional flocculant ferric chloride (FeCl 3 ) for MP removal in marinr water. The PS flocculation efficiency of Fe (III)–EOM treatment achieved 90 %, which is 5 to 10 times higher than that of FeCl 3 treatment. Zeta potential, scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) analyses revealed that EOM significantly enhanced flocculation by facilitating charge neutralization and agglomeration adsorption. Additionally, reductions in total organic carbon (TOC), protein, total sugars and Fe concentration after flocculation in the Fe (III)–EOM system confirmed effective binding and co–precipitation of organic compounds in EOM with Fe (III). At 1 mmol/L Fe (III), the removal efficiency of TOC, total sugars, and proteins in the K1–EOM/S1–EOM systems reached 39 %/21 %, 47 %/40 %, and 10 %/18.7, respectively. Notably, the Fe (III)–EOM system significantly reduced residual iron levels to below 1 mg/L, which is significantly lower than that using FeCl 3 alone (29.1 mg/L). Therefore, the Fe (III)–EOM flocculation system demonstrates a high flocculation efficiency with low iron residue, providing a promising and sustainable solution for MP removal in water treatment.
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高影响因子
DESALINATION
·
2023
·
IF 9.9
Lanlan Ye,Li Wang,Zhongao Wei,Shenghua Zhou,Zhikan Yao,Fuqiang Fan,Ying Mei
Tailoring nanofiltration (NF) membrane with low scaling potential and high energy efficiency is of critical importance to its practical implementation for groundwater remediation . In this study, interfacial polymerization was performed on the surface of an intermediate layer of TA-Fe/CNTs coated polyether sulfone (PES) substrate to obtain a loose NF membrane (TFNi-x) with negative surface charges and optimized water transport path for selective permeation of scaling ions and higher water permeance . The obtained TFNi-10 intermediated with a moderate amount of CNTs (10 μg/cm 2 ) exhibited 80.5 % higher selectivity of Ca 2+ over SO 4 2− and 156 % higher water permeance compared to the control TFC while maintaining a high PFOA rejection (∼97.3 %). For the gypsum scaling measurements, TFNi-10 showed better anti-scaling behavior and 40 % less pressure energy consumption for the same recovered water volume (2.2 L), resulting in the higher water recovery and lower energy cost of specific volume of the permeate. It was contributed by the synergistic effects of the strong affinity of TA-Fe to piperazine monomer and the gutter effect of TA-Fe/CNTs interlayer . Our results paved a new way of fabricating novel NF membrane with tailored intermediate layer for optimized interfacial polymerization to realizing groundwater remediation in a cost-effective manner.
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高影响因子
危险品化学品经营许可证（带存储）