Water
·
2023
·Vol. 15
·期 15
·2856
·
IF 3.4
Jing Wang,Huanyu Zhou,Li Ma,Quanfeng Wang,Da Sun,Libo Jin,Guoming Zeng,Jujiao Zhao
Peroxymonosulfate (PMS) activation has gained increasing attention for its water remediation. In this work, carbon nanotube-supported FeCo2O4nanoparticles (FeCo2O4/CNT) were prepared and showed tremendous potential as a catalyst for PMS activation. The synergistic effect between FeCo2O4and CNT in FeCo2O4/CNT promotes its better catalytic performance than individual CNT or FeCo2O4. The synthesized FeCo2O4/CNT could reach 100% phenol removal with akvalue of 0.30 min−1within 15 min ([PMS] = 0.3 g L−1, [FeCo2O4/CNT] = 0.3 g L−1). FeCo2O4/CNT can adapt well to a wide pH range (4–9) and a complex water component (with inorganic ions or organic matter). Moreover, the catalytic mechanism investigation suggested that both radical and non-radical pathways are accountable for the efficient removal of phenol.Keywords:peroxymonosulfate;FeCo2O4/CNT;phenol removal
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Zihang Cheng,Fenglian Fu,Yansong Pang,Bing Tang,Jianwei Lu
Currently, organic pollution is becoming increasingly severe with continued industrialization. In this study, the characterization of acid-washed zero-valent aluminium (AW-ZVAl) and the mechanism of using AW-ZVAl/Air/H + system in the presence of H 2 O 2 to remove phenol were investigated. The influencing factors including acid washing time, AW-ZVAl concentration, pH, H 2 O 2 concentration, air or N 2 conditions, and humic acid (HA) on phenol removal were studied. AW-ZVAl exhibited a greater capacity to remove phenol than that of ZVAl. In the presence of 4.0 mM H 2 O 2 , the phenol concentration decreased from initial 20.0 mg/L to 0.3 mg/L by 6.0 g/L AW-ZVAl in 3 h at initial pH 2.7. The addition of H 2 O 2 into AW-ZVAl/Air/H + system facilitated the reaction due to the enhancement of hydroxyl radicals generation, while the addition of HA inhibited the reaction due to the competitive reaction of HA and phenol with hydroxyl radicals. The reusing of AW-ZVAl showed that the AW-ZVAl was consistently effective in 5 cycles. The removal mechanism of phenol in the AW-ZVAl/Air/H + and AW-ZVAl/N 2 /H + were discussed. This study demonstrates that AW-ZVAl has a great potential to be applied in treating wastewater containing organic pollutants.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Miaomiao Ye,Xiaojiao Zhou,Ziyi Luo,Xingyuan Wang,Wen Jin,Xiaowei Liu
The formation of “high-temperature, high-salt and intense-light” environment during the new process of photothermal distillation desalination causes volatile pollutants such as phenol in seawater to volatilize into condensed freshwater, resulting the quality safety risk of the freshwater. In this work, activated peroxides processes including hydrogen peroxide (H 2 O 2 ), peroxyacetic acid (PAA), peroxodisulfate (PDS) and peroxymonosulfate (PMS) were applied for the inhibition of phenol entering condensed freshwater by making full use of the “high-temperature, high-salt, intense-light” media. Under the same conditions, the phenol removal efficiency by the activated peroxides were in the order of H 2 O 2 < PDS < PAA < PMS. The effects of the salinity, peroxide dosage, initial phenol concentration, humic acid and sunlight intensity on the distillation rates (R D ) of phenol were investigated. It was revealed that the main factor for activation of H 2 O 2 , PAA, PDS and PMS were heat, Cl − /heat, heat/light and Cl − , respectively. Though both PMS and PAA could completely degrade phenol and reduced its entry into condensed freshwater, PMS formed fewer halogenated distillation by-products and was more promising for future applications.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Ying Wang,Yanqiang Tang,Wei Jiang,Qingdong Qin,Rongsheng Lu,Yan Xu
Sulfurized nanoscale zero-valent iron supported on biochar (BC-SNZVI) has been successfully synthesized for 2,4,6-trichlorophenol (2,4,6-TCP) removal, while was only effectively under acidic conditions. To obtain highly efficient removal of 2,4,6-TCP within a broader pH range, weak static magnetic fields (WMF) was applied in BC-SNZVI/2,4,6-TCP aqueous systems. Results showed 30 mT WMF supported the most extensive 2,4,6-TCP removal, and 87.4% of 2,4,6-TCP (initial concentration of 30 mg/L) was removed by 0.5 g/L BC-SNZVI at neutral pH (pH = 6.8) within 180 min, which was increased by 54.4% compared to that without WMF. The observed rate constant ( K obs ) under 30 mT WMF was 2.1-fold greater than that without WMF. Although three typical anions (NO 3 − (0.5–10.0 mM), H 2 PO 4 − (0.05–0.5 mM), and HCO 3 − (0.5–5.0 mM)) still inhibited 2,4,6-TCP removal, WMF could efficiently alleviate the inhibitory effects. Moreover, 73.1% of 2,4,6-TCP was successfully removed by BC-SNZVI under WMF in natural water. WMF remarkably boosted the dechlorination of 2,4,6-TCP, increasing the 2,4,6-TCP dechlorination efficiency from 45.2% (in the absence of WMF) to 83.8% (in the presence of WMF) by the end of 300 min. And the complete dechlorination product phenol appeared within 10 min. Force analysis confirmed the magnetic field gradient force ( F B ) moved paramagnetic Fe 2+ at the SNZVI surface along the direction perpendicular to the external applied field, promoting the mass-transfer controlled SNZVI corrosion. Corrosion resistance analysis revealed WMF promoted the electron-transfer controlled SNZVI corrosion by decreasing its self-corrosion potential ( E corr ). With the introduction of sulfur, the magnitude of F B doubled and the E corr decreased comparing with NZVI. Our findings provide a facile and viable strategy for treating chlorinated phenols at neutral pH.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jiafeng Jin,Jinsheng Sun,Kaihe Lv,Xuan Guo,Qilin Hou,Jingping Liu,Jintang Wang,Yingrui Bai,Xianbin Huang
The introduction of oxygen-defects has been a versatile strategy to enhance photocatalysis efficiency. In this work, a 2D/3D Bi/BiO 2-x /Bi 2 WO 6 heterojunction photocatalyst with rich oxygen-defective was in sequence prepared through a facile solvothermal method , which displays favorable photocatalytic activity towards organic contaminants under visible-NIR light irradiation . The enhancement in photocatalytic performance can be attributed to the synergistic effect between oxygen-vacancy-rich heterojunction and the localized surface plasmon resonance induced by metallic Bi. The functional group interaction, surface morphology , crystal structure, element composition , and tuned bandgap were investigated by FT-IR, SEM, Raman shift, ICP-MS, and XPS technique. The spectrum response performance of the photocatalyst was verified by UV–visible DRS analysis. Results of photodegradation experiments toward organic contaminants showed that the prepared photocatalyst can degrade 90% of phenol in 20 mins under visible-NIR light irradiation, both Z-scheme heterojunction and the introduction of Bi metal contribute to the enhancement in the photocatalytic activity. The results of the DFT calculation suggest that the valence band-edge hybridization within BiO 2-x and Bi 2 WO 6 can effectively enhance the photocatalytic performance by increasing the migration efficiencies of electron-hole pairs. Moreover, a possible mechanism was proposed on the results of EIS, ESR and GC–MS tests. This work offers a novel insight for synthesizing efficient visible-NIR light photocatalysis by activating the semiconductors with Bi metal.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 25
·期 3
·719-726
·
IF 1.624
Hu Xuebing,Yu Yun,Ren Shuang,Lin Na,Wang Yongqing,Zhou Jianer
To achieve superior separation performance in the phenol aqueous solutions treatment, a novel graphene oxide/Al 2 O 3 composite membrane was prepared by a spin coating process. The microstructure measurement shows that the composite membrane has a multilayer structure and graphene oxide has been tightly coated on the surface of the Al 2 O 3 membrane interlayer homogeneously. During the treatment of phenol aqueous solutions, the permeation flux and phenol rejection of the composite membrane were investigated. The results show the permeation flux of the membrane is about 1.153 L m −2 h −1 bar −1 and the phenol rejection of the membrane increases to 99.9% when the phenol concentration is 0.01 g L −1 . The high phenol rejection of the composite membrane is mainly attributed to the physical sieving, the solution–diffusion effect and the hydrophobic nature of graphene oxide. All these results indicate the GO/Al 2 O 3 composite membrane is a suitable material for the removal of phenol from aqueous solutions in environmental pollution management.
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
Food Chemistry-X
·
2025
·
IF 8.2
Xin Ning,Chengrong Wen,Shimin Chen,Lina Chen,Xiaohui Huang,Lei Wang
The effects of defatting and dephenolization treatments on the structural, physico-chemical and technological properties of passion fruit epicarp flour (PFEF) were evaluated in this research. The FT-IR, SEM and XRD results illustrated that defatted and defree phenolics did not change the basic chemical structure of PFEF, while debound phenolics treatment hydrolyzed the ester bonds between dietary fiber and polyphenols and hydrolyzed the amorphous region of dietary fiber, resulting in self-assembly into a larger aggregate with a compact texture. All three kinds of treatment could improve the flowability of passion fruit epicarp flour to some extent. In addition, dephenolization treatment brought about an obvious change in the technological properties of PFEF, and removal of free polyphenols or bound polyphenols contributed to two completely different effects on partial indicators. These properties may be important for their value-added utilization.
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science of Advanced Materials
·
2018
·Vol. 10
·期 12
·1729-1736
·
IF 1.318
Fan Youhua,Wu Zhenming,Sun Tiantian,Zhan Haijuan,Liu Wanyi,Bi Shuxian
Horseradish peroxidase (HRP) was successfully immobilized on a novel enzyme carrier, hydride composite of graphene oxide grafted sodium styrene sulfonate (GO-g-PSStNa), and used for removal of phenol from water. Hydride composite (GO-g-PSStNa) was synthesized using graphene
oxide (GO) and sodium styrene sulfonate (SStNa) by atom transfer radical polymerization (ATRP). The morphologies and chemical composition of the resulted samples were investigated by SEM, FTIR and XPS. The results showed that the hydrophilic monomer SStNa was grafted onto the surface of the
GO. HRP was immobilized on the surface of hydride material and its loading reached 8.0 mg/g under the immobilization conditions of pH 7 at 0 °C. The removal efficiency of phenol for immobilized HRP had an optimum pH 6, which was shifted to 8 for free enzyme. Both the free and immobilized
enzyme shared the same optimal temperature at 40 °C. Immobilized HRP exhibited higher removal efficiency for phenol compared with free HRP. The best immobilization effect could be reused at least eight times. The high phenol removal can be resulted by improvement of catalytic activity
of immobilized HPR with adsorption on GO-g-PSStNa support.
研究领域:
生物化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2015
·Vol. 39
·期 3
·503-517
·
IF 2.737
Wenming Yang,Lukuan Liu,Xiaoni Ni,Wei Zhou,Weihong Huang,Hong Liu,Wanzhen Xu
A molecular simulation method was introduced to compute the phenol–monomer pre-assembled system of a molecularly imprinted polymer. The interaction type and intensity between phenol and monomer were evaluated by combining binding energy and charge transfer with complex conformation. The simulation results indicate that interaction energies are simultaneously affected by the type of monomer and the ratio between phenol and monomers. At the same time, we considered that by increasing the amount of functional monomer is not always better for preparing molecularly imprinter polymers. In this study, three kinds of novel magnetic phenol-imprinted polymers with favorable specific adsorption effects were prepared by the surface imprinting technique combined with atom transfer radical polymerization. Various measures were selected to characterize the structure and morphology to obtain the optimal polymer. The characterization results show that the optimal polymer has suitable features for further adsorption process. A series of static adsorption experiments were conducted to analyze its adsorption performance, which follows the Elovich model from the kinetic analysis and the Sips equation from the isothermal analysis. To further verify the reliability and accuracy of the simulation results, the effects of different monomers on the adsorption selectivity were also determined. They display higher selectivity towards phenol than 4-nitrophenol.The results from the simulation of the pre-assembled complexes are in reasonable agreement with those from the experiment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Guangxu Bo,Liangcheng Jiao,Huanhuan Li,Guowei Zhao,Zitang Xu,Xiaoxiao Liu,Pengbo Wang,Xiaoke Tian,Jinyong Yan,Xueqing Wang,Yunjun Yan
In this study, the removal efficiencies of bio-based rigid polyurethane foams (“RPUFs” group), Alcaligenes faecalis subsp. faecalis NBRC 13111 T (“strain” group), and the combined use of RPUFs and A. faecalis subsp. faecalis NBRC 13111 T (“RPUFs + strain” group) were investigated. The concentration of NaCl, number of RPUFs, initial pH and initial phenol concentration were sequentially examined. The results showed the adsorption of phenol in “RPUFs” group and “RPUFs + strain” group was improved with the increased number of RPUFs, and the highest adsorption was about 200 mg/L when 40 pieces of RPUFs were used. Under all conditions, the phenol removal efficiency of “RPUFs + strain” group was higher than that of the “strain” group. With the increased concentration of NaCl, the complete removal time of phenol in “strain” group and “RPUFs + strain” group was correspondingly prolonged. In neutral and weakly alkaline conditions, the phenol removal efficiency of “strain” group and “RPUFs + strain” group was much improved, and the phenol-removed time of 500 mg/L of “RPUFs + strain” group was only 30 h at the pH of 7. With the increase of initial phenol concentration, the complete removal time in “strain” group and “RPUFs + strain” group was delayed, especially at the high concentration of 1100 mg/L, the “strain” group had nearly no ability to remove phenol, while the “RPUFs + strain” group could still completely removed phenol at 78 h. The phenol removal mechanism of the “RPUFs + strain” group was attributed to “physical adsorption - biodegradation”.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 6
·8781-8797
·
IF 0
Al-Nayili Abbas,Alhaidry Wissam A.
Herein, novel surface structure LaFeO 3 /nitrogen-deficient g-C 3 N 4 nanocomposites (LaFeO 3 /g-C 3 N 4 -H) have been successfully synthesized by a two-step process. First, nitrogen-deficient graphitic carbon nitride (g-C 3 N 4 -H) was produced by thermally condensing melamine that had been treated with acetic acid as a precursor. After that, LaFeO 3 was incorporated into the g-C 3 N 4 -H nanosheets. The as-prepared nanostructured materials were characterized by XRD, FT-IR, N 2 adsorption–desorption experiments, FESEM, and TEM, demonstrating the formation of interfacial interaction and heterogeneous structure in LaFeO 3 /g-C 3 N 4 -H nanocomposites. Additionally, UV–vis diffuse reflectance spectra (DRS) and photoluminescence spectra (PL) have been used to assess the optical properties of the nanohybrids. The results show that the LaFeO 3 /g-C 3 N 4 -H nanocomposite was successfully produced with a reliable interfacial interface, and produced a good heterojunction relationship between g-C 3 N 4 -H and LaFeO 3 which may significantly boost the photocatalytic activity as compared to prinstine g-C 3 N 4 and LaFeO 3 . Phenol degradation under visible light irradiation was used to test the photocatalytic activity of LaFeO 3 /g-C 3 N 4 -H, and the results showed that 10%-LaFeO 3 /g-C 3 N 4 -H had significant photocatalytic activity and remarkable adsorption efficiency, with an overall removal rate of phenol up to 88% after 180 min of visible light irradiation. This study may present a novel method for developing highly efficient artificial photocatalytic systems.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
催化
·
物理化学
✓ 已验证
DOI
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Tao Pei,Feng Shi,Can Liu,Yi Lu,Xu Lin,Defa Hou,Shunxiong Yang,Jirong Li,Zhifeng Zheng,Yunwu Zheng
In this study, a novel nitrogen-doped magnetic Fe–Ca codoped biochar for phenol removal was successfully fabricated via a hydrothermal and coactivation pyrolysis method. A series of adsorption process parameters (K 2 FeO 4 to CaCO 3 ratio, initial phenol concentration, pH value, adsorption time, adsorbent dosage and ion strength) and adsorption models (kinetic models, isotherms and thermodynamic models) were determined using batch experiments and various analysis techniques (XRD, BET, SEM-EDX, Raman spectroscopy , VSM, FTIR and XPS) to investigate the adsorption mechanism and metal-nitrogen-carbon interaction. The biochar with a ratio of Biochar: K 2 FeO 4 : CaCO 3 = 3:1:1 exhibited superior properties for adsorption of phenol and had a maximum adsorption capacity of 211.73 mg/g at 298 K, C 0 = 200 mg/L, pH = 6.0 and t = 480 min. These excellent adsorption properties were due to superior physicomechanical properties (a large specific surface area (610.53 m 2 /g) and pore volume (0.3950 cm 3 /g), a well-developed pore structure (hierarchical), a high graphitization degree (I D /I G = 2.02), the presence of O/N-rich functional groups and Fe-Ox,Ca-Ox, N-doping, as well as synergistic activation by K 2 FeO 4 and CaCO 3 ). The Freundlich and pseudo-second-order models effectively fit the adsorption data, indicating multilayer physicochemical adsorption. Pore filling and π-π interactions were the predominant mechanisms for phenol removal, and H-bonding interactions, Lewis-acid-base interactions, and metal complexation played an important role in enhancing phenol removal. A simple, feasible approach with application potential to organic contaminant/pollutant removal was developed in this study.
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
危险品化学品经营许可证（带存储）