MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Linqing Liang,Jiahong Wang,Yanxin Zhang
In this study, H 2 O 2 oxidized magnetic mesoporous carbon hollow microspheres (Fe 3 O 4 @void@C@H 2 O 2 ) with core-shell structure, high magnetic properties and abundant oxygen-containing functional groups was synthesized for removal of Cr(III)-EDTA and Cr(III) in high salinity wastewater. Fe 3 O 4 @void@C@H 2 O 2 was synthesized at optimum conditions of H 2 O 2 concentration of 20%, oxidation temperature of 40 °C and oxidation time of 4 h, and the determined adsorption amount of Cr(III)-EDTA and Cr(III) on the adsorbent was 9.72 and 10.53 mg g −1 at pH 4.0 and 25 °C, respectively. Adsorption behavior of Cr(III)-EDTA could be better described by Langmuir isotherm and Cr(III) adsorption followed Freundlich isotherm. Cr(III)-EDTA and Cr(III) adsorption on the adsorbent followed pseudo-second-order kinetics, and adsorption rate of Cr(III) adsorption on the adsorbent is higher than that of Cr(III)-EDTA. Fe 3 O 4 @void@C@H 2 O 2 showed strong affinity for Cr(III) and Cr(III)-EDTA even in high salinity water. Moreover, Fe 3 O 4 @void@C@H 2 O 2 exhibited the high stability in acid solution and Cr(III) saturated adsorbent can be easily regenerated in 0.1 mol L −1 HCl. Cr(III)-EDTA adsorption was described to the surface complexation between the oxygen-containing groups (such as hydroxyl, carbonyl and carboxyl groups) of the adsorbent and Cr(III) in Cr(III)-EDTA, and the hydrogen bonding between oxygen-containing groups of the adsorbent and EDTA of Cr(III)-EDTA, while Cr(III) adsorption on the adsorbent was surface complexation and ion exchange. The results highlighted that Fe 3 O 4 @void@C@H 2 O 2 have great potentials for adsorptive removal of Cr(III) and it's chelate from the high salinity wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 1
·e202403550
·
IF 2
Qiulin Deng,Yuling Zhang,Xuanzhe Liao,Qianru He,Boli Zeng,Hong Luo,Lianjun Shi,Jinlong Jiang,Faqin Dong
Graphical In this study, the ZIF-8/GO composite was successfully prepared by the one-pot method and applied to the highly efficient removal of CR from high-concentration saline wastewater. The maximum removal ratio was up to 98%. Meanwhile, it was revealed that the removal of CR by ZIF-8/GO depended on hydrogen bonding, electrostatic interaction, and π-π stacking. Dye wastewater is high-concentration salt-containing chemical wastewater. It contains numerous toxic pollutants that are difficult to degrade, and its direct discharge without treatment will cause serious environmental problems. Herein, ZIF-8/GO adsorbent was prepared by the one-pot method to purify wastewater containing Congo red dye (CR). ZIF-8/GO possessed an S BET of 70.252 m 2 /g, pore volume of 0.036 cm 3 /g, and pore size of 3.22 nm. Adsorption experiments of ZIF-8/GO were performed based on various parameters, such as pH, concentration, dose, temperature, and salt concentration. The results showed that the adsorption capacity of ZIF-8/GO was better than ZIF-8 and GO for CR, which the adsorption process of 0.1-ZIF-8/GO (10.0 mg) for CR (50 mg/L) reached equilibrium in 60 min at 35 °C under the high-salt parameter (10 g/L NaCl). And the maximum removal ratio was up to 98%. Adsorption data were fitted using the Langmuir, and Freundlich isotherm models and pseudo-first-order, pseudo-second-order kinetics model and liquid film diffusion model, intra-particle diffusion model. The results indicated that the quasi-second-order kinetic model and Freundlich model were more suitable to describe the adsorption process for the removal of CR by ZIF-8/GO. ZIF-8/GO possesses a high removal ratio and it has promising applications in high-concentration salts-containing wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Fengjiao Quan,Guangming Zhan,Pengfei Xu,Xiaolan Chen,Wenjuan Shen,Falong Jia,Yun He,Jianfen Li
Nitrate (NO 3 – ) is a widespread pollutant in high-salt wastewater and causes serious harm to human health. Although electrochemical removal of nitrate has been demonstrated to be a promising treatment method, the development of low-cost electro-catalysts is still challenging. In this work, a phosphate modified iron (P-Fe) cathode was prepared for electrochemical removal of nitrate in high-salt wastewater. The phosphate modification greatly improved the activity of iron, and the removal rate of nitrate on P-Fe was three times higher than that on Fe electrode. Further experiments and density functional theory (DFT) calculations demonstrated that the modification of phosphoric acid improved the stability and the activity of the zero-valent iron electrode effectively for NO 3 – removal. The nitrate was firstly electrochemically reduced to ammonium, and then reacted with the anodic generated hypochlorite to N 2 . In this study, a strategy was developed to improve the activity and stability of metal electrode for NO 3 – removal, which opened up a new field for the efficient reduction of NO 3 – removal by metal electrode materials .
研究领域:
环境科学
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电化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Yue Sun,Yuanyuan Wang,Zheng Peng,Yan Liu
Sulfanilic acid (SA) is an important organic compound with numerous applications in industrial production, while the organic wastewater with high salinity is inevitably generated. In this work, desalination strategy of hypersaline SA wastewater was proposed by using bipolar membrane electrodialysis (BMED), which can realize the separation of SA and NaCl in wastewater and the conversion of NaCl into HCl and NaOH simultaneously. The influences of current density, initial concentrations of acid, base, SA and salt were investigated. The results showed that current efficiency decreased and energy consumption increased with an increase in current density. Higher initial concentrations of acid and base were favor to reduce energy consumption but current efficiency was low. At the current density of 40 mA/cm 2 , the initial acid and base concentrations of 0.10 mol/L, the highest concentrations of HCl and NaOH with initial salt concentration in the simulated feed solution of 80 g/L NaCl was 1.17 mol/L and 1.18 mol/L, respectively. Moreover, the total process cost of BMED process was estimated at $1.68/kg HCl and $1.52/kg NaOH respectively under the optimal experimental conditions. These findings confirmed that BMED may be an alternative and cost-effective strategy for treating high salinity SA wastewater.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Xiaochao Yu,Yan Lin,Haiyang Liu,Chunping Yang,Yanrong Peng,Cheng Du,Shaohua Wu,Xiang Li,Yuanyuan Zhong
In this work, Ag 3 PO 4 /PANI/Cr:SrTiO 3 photocatalysts were designed to effectively eliminate organic pollutants including Rhodamine B and phenol from high salinity wastewater under visible light . The phase composition , optical properties , and morphology of powders were studied, and the effects of inorganic salts on removal performance of the as-prepared particles were also tested. Results showed that the photocatalytic activities of Ag 3 PO 4 /PANI/Cr:SrTiO 3 composites for Rhodamine B and phenol reached 100% within 10 min and 18 min, respectively. The reaction rate of pure Ag 3 PO 4 was 7 times less than that of the ternary composite with the adding of PANI and Cr:SrTiO 3 . The activity of Ag 3 PO 4 /PANI/Cr:SrTiO 3 remained at 92.25% after five cycles, so the photocatalytic and recyclable performance of ternary composite was greatly improved. In addition, when there was SO 4 2− with a content of ranging from 1% to 21%, the degradation activity of the ternary catalyst under visible light was not changed for Rhodamine B, which indicated that the ternary catalyst exhibited the excellent sulfate resistance ability. Results from ESR and radical trapping experiments showed that O 2 − and h + made an important contribution to visible-light photocatalytic activities .
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2021
·
IF 4.311
Yong Suo,Yongsheng Ren
The influence of representative typical pollutants in the zero-discharge process of coal chemical high-salty wastewater on the fouling behavior of nanofiltration membranes was studied. In this study, a commercially available NF90 nanofiltration membrane was selected, with three inorganic salts, cyclohexanol (C 6 H 12 O) and APAM as the main target foulants. Various membrane samples were characterized by Contact angle, AFM and SEM-EDS, and the membrane fouling behavior was quantitatively evaluated by analyzing the influence of the interaction between different components in the feed solution on the membrane flux and interface thermodynamics. The results show that the deposition of fouling is closely related to the interface free energy (ΔG). The AB interfacial energy significantly affects membrane fouling. Membrane fouling is mainly dominated by residual APAM, followed by inorganic salts and cyclohexanol. The interaction between organic and inorganic fouling is the core factor that exacerbates membrane fouling. The interaction between APAM and inorganic salt ions mainly accelerates membrane fouling through charge shielding and complexation. Cyclohexanol accelerates membrane fouling mainly by reducing the solubility of inorganic salts and absorbing on the surface of the fouling layer. The competition and synergy between hydrophilic APAM and hydrophobic cyclohexanol are also the factors that aggravate membrane fouling.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Chen Wang,Mingjie Huang,Wentao Hu,Wei Xiang,Tao Zhou,Juan Mao,Feixiang Zan,Xiaohui Wu
The carcinogenic and hard-to-dispose Cr(VI) in high-salinity industrial wastewater has caused severe environmental problems. Herein, a novel hollow spherical CuFe 2 O 4 spinel oxide with concentrated confined oxygen vacancies (HS/CuFe 2 O 4 -OVs) was developed for Cr(VI) decontamination. Such a fancy material delivers a remarkable removal rate of 0.041 min −1 , approximately-one order of magnitude higher than the commonly reported iron-based materials. The OVs in the confined space could exert dual effects on Cr(VI) removal from the aspects of enhanced stabilization via local electronic structure regulation and strengthened immobilization via electron conductivity modulation. Importantly, due to the highly sensitive response of Cr(VI) to the changed confined OVs content, the HS/CuFe 2 O 4 -OVs showed higher selectivity for Cr(VI) removal in the interference of high concentration salts than its nonhollow-structured counterpart and can successfully treat Cr(VI)-contaminated industrial wastewater with high salinity. This work opens up a new concept for rational design of robust spatial confined architectures for Cr(VI) treatment.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
DESALINATION
·
2021
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IF 9.501
Chenghan Ji,Zhigao Zhu,Lingling Zhong,Weiming Zhang,Wei Wang
Electrospun fibrous distillation membrane (EFDM), owing to its low mass transfer resistance for relatively high-water flux, has attracted significant attention to the treatment of high salinity wastewater with membrane distillation. However, a significant challenge in using EFDM for desalination of high-salinity wastewaters is pore wetting induced by scaling. Herein, we designed a firm-pore superhydrophobic fibrous membrane via a facile and scalable electrospinning in combination with dip-coating methods, which displayed a high-water flux of about 28.5 L/m 2 ·h (ΔT = 40 °C) and unexpected durability (>312 h) in the long-term running of direct contact membrane distillation . Significantly, we also systematically investigate the effect of surface wettability and pore structure on the durability of EFDM. The experiments and simulations demonstrate that the formation of firm-pore among the EFDM has a substantial influence on the membrane durability when desalinating high salinity wastewaters, owing to the avoidance of pore deformation influenced by the feedwaters turbulent on the EFDM surface . Meanwhile, the superhydrophobic surface also helps reducing the contact area between the crystals and the salts to further improve the membrane durability. The theory simulation may provide new insight into designing novel structured fibrous membrane to improve the fibrous membrane stability in MD.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Liangjie Wang,Chunxiang Geng,Dawei Yu,Daoqing Liu,Hao Sun,Ke Xiao,Huazhang Zhao
High temperatures and high pressures restrict the application of catalytic wet air oxidation (CWAO). Thus, realizing the high performance of CWAO under ambient pressure (AP-CWAO) is attractive. In this study, hydrophobic modification by polytetrafluoroethylene (PTFE) was adopted to enhance the O 2 transfer and salts resistibility of hollow microspheres NiCo 2 O 4 (HM-NiCo 2 O 4 ), for harvesting an efficient catalyst of AP-CWAO to treat high-salt wastewater. Under ambient pressure in 10 g/L NaCl solution, PTFE modified HM-NiCo 2 O 4 (PHM-NiCo 2 O 4 ) can catalyze O 2 to realize about 70 % mineralization of bisphenol A (BPA, 100 mg/L) within 240 min at 80 ℃, while it is only about 50 % for HM-NiCo 2 O 4 . Density functional theory calculations and molecular dynamics simulations show that PTFE indeed can enhance O 2 transfer and salt resistibility of HM-NiCo 2 O 4 . HO•, O 2 •- , and 1 O 2 all contribute to the degradation of BPA in presence of O 2 . These reactive oxygen species generate based on Mars-van Krevelen mechanism.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Zhao Song,Yu Zhang,Peiru He,Xuesong Liu,Nanqi Ren,Yidi Chen
Phenolic pollutants are highly toxic and can affect the growth and reproduction of aquatic organisms, as well as contaminate drinking water resources, posing a significant threat to both ecological and human health. However, conventional biological treatment processes are constrained in treating high salinity organic wastewaters due to the potentially lethal effects of high concentrations of dissolved salts on microorganisms. While advanced oxidation processes have shown promise in removing phenolic contaminants from high-saline wastewater, their widespread application is always limited by the high costs associated with energy and chemical usage. In this study, we explored the potential application of directly introducing peroxymonosulfate (PMS) and peracetic acid (PAA) to high-salinity water for the removal of nine phenolic contaminants. By establishing a correlation between the degradation rate constants in the PMS/Cl – ( k PMS ) and PAA/Cl – ( k PAA ) systems and various molecule descriptors, two multiple linear regression models were developed to predict the degradation rate constants under investigation. Additionally, we selected bisphenol A (BPA) as the target contaminant and investigated the impact of common ions found in natural water, such as HCO 3 – , NO 3 – , and humic acid, on the removal of BPA using two systems. Finally, we conducted experiments using tap water and sewage water to demonstrate the practical application and performance of the two systems. These experiments aimed to provide valuable insights into the influence of background chloride on PMS and PAA activation, as well as the potential of direct PMS/PAA introduction for eliminating phenolic micropollutants from high-saline wastewaters.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Zhuoyu Bu,Xiaoyu Li,Yan Xue,Jingya Ye,Jingyi Zhang,Yuwei Pan
This study demonstrated a fast and efficient treatment of highly salty wastewater in a hydroxylamine (HA) enhanced Fe 0 /H 2 O 2 system. The apparent rate constant ( k ) in Fe 0 -HA/H 2 O 2 system could achieve 7.9 times higher than that in Fe 0 /H 2 O 2 system using tartrazine as the target pollutant and Na 2 SO 4 as the model salt. The value of k for removing tartrazine in the salty system by Fe 0 -HA/H 2 O 2 process even 12.7 times higher than that in the conventional system which was attributed to the faster Fe 0 corrosion rate in the salty system. Meanwhile, Fe 0 -HA/H 2 O 2 process could obtain remarkable performance for highly salty wastewater treatment at wide salt concentration levels (0–0.2 M) and could also widen the application of pH to neutral pH. The characterizations by SEM and XPS, the intensity of DMPO–OH adduct signals and detection of Fe 2+ and Fe 3+ ions in different systems confirmed the good performance was owing to the faster Fe 0 corrosion rate in the salty system and acceleration of Fe 3+ /Fe 2+ recycle owing the addition of HA inducing fast catalysis of H 2 O 2 and generation of hydroxyl radicals. Moreover, the value of k for removing tartrazine in various types of salty system by Fe 0 -HA/H 2 O 2 process was 2.9–30.8 times larger than Fe 0 /H 2 O 2 process demonstrating the good suitability of Fe 0 -HA/H 2 O 2 process at various types of salty system. Therefore, this study will shed lights on the reactivity of the Fe 0 -HA/H 2 O 2 system and provide an alternative pathway for removal of salty wastewater.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2021
·Vol. 16
·期 6
·1-10
·
IF 4.357
Man Quanli,Zhang Peilian,Huang Weiqi,Zhu Qing,He Xiaoling,Wei Dongsheng
A novel salt-tolerant heterotrophic nitrification and aerobic denitrification (HN-AD) bacterium was isolated and identified as Halomonas venusta TJPU05 ( H. venusta TJPU05). The nitrogen removal performance of H. venusta TJPU05 in simulated water (SW) with sole or mixed nitrogen sources and in actual wastewater (AW) with high concentration of salt and nitrogen was investigated. The results showed that 86.12% of NH 4 + -N, 95.68% of NO 3 − -N, 100% of NO 2 − -N and 84.57% of total nitrogen (TN) could be removed from SW with sole nitrogen sources within 24 h at the utmost. H. venusta TJPU05 could maximally remove 84.06% of NH 4 + -N, 92.33% of NO 3 − -N, 92.9% of NO 2 − -N and 77.73% of TN from SW with mixed nitrogen source when the salinity was above 8%. The application of H. venusta TJPU05 in treating AW with high salt and high ammonia nitrogen led to removal efficiencies of 50.96%, 47.28% and 43.19% for NH 4 + -N, NO 3 − -N and TN respectively without any optimization. Furthermore, the activities of nitrogen removal-related enzymes of the strain were also investigated. The successful detection of high level activities of ammonia oxygenase (AMO), hydroxylamine oxidase (HAO), nitrate reductase (NAR) and nitrite reductase (NIR) enzymes under high salinity condition further proved the HN-AD and salt-tolerance capacity of H. venusta TJPU05. These results demonstrated that the H. venusta TJPU05 has great potential in treating high-salinity nitrogenous wastewater.
研究领域:
微生物学
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环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）