SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Huiping Zeng,Weihua Zhao,Siqi Sun,Xiao Sun,Yuwei Zeng,Ruixia Hao,Jie Zhang,Dong Li
In this study, we demonstrated the effective acquisition of magnetic iron oxide (MIO) for As(V) adsorption by high-temperature pyrolysis of waste iron sludge from the water treatment plant under a confined environment without adding extra chemical reagents. The operating temperature and time in the pyrolysis process were optimized to improve the yield of MIO and its As(V) adsorption capacity. MIO 500 – 2 (500 °C, 2 h) had both relatively high yield and arsenic adsorption efficiency, which was characterized by XRD and XPS as mainly γ-Fe 2 O 3 with small particle size (100–900 nm), significant mesopore (12.43 nm), high specific surface area (65.25 m 2 /g), and effective saturation magnetization intensity (14.45 emu/g). The maximum adsorption capacity was 14.2 ± 0.4 mg/g, and the removal rate could still reach about 80 % after five times of adsorbent regeneration. Considering this facile preparation route and its high yield, large-scale production of MIO from waste iron sludge is feasible, which is expected to provide a low-cost and efficient adsorbent for the treatment of arsenic-containing water in less economically developed areas.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Weihua Zhao,Huiping Zeng,Qihan Wang,Xiao Sun,Yuwei Zeng,Dong Li,Jie Zhang
Environmental protection has become a pressing concern for numerous countries, with waste-to-waste strategies at the forefront. This study demonstrated the successful fabrication of bifunctional magnetic microspheres for arsenic remediation using waste iron sludge as precursor material. The synthesized material exhibited a monodisperse particle size distribution ranging from 300 to 500 μm, with a saturation magnetization of 22 emu/g ensuring efficient magnetic recovery. Maximum arsenic adsorption capacities of 21.99, 21.63, and 14.2 mg/g were observed at pH 5.7, 7.0, and 9.0, respectively, while stable adsorption performance persisted across a broad pH range (2−10).Kinetic analysis revealed close adherence to the pseudo-second-order model (R² > 0.99), complemented by Freundlich isotherm fitting suggesting multilayer adsorption. Notably, the 28.6 % reduction in zeta potential post-adsorption, coupled with enhanced adsorption capacity at elevated ionic strength, confirmed predominance of chemisorption processes through inner-sphere complexation mechanisms. Competitive adsorption experiments showed that carbonate, silicate, and phosphate ions substantially inhibited As(V) removal through ligand competition, while chloride, nitrate, and sulfate exhibited negligible effects. The material retained 76 % removal efficiency after 5 regeneration cycles, demonstrating remarkable environmental adaptability and engineering application potential. Consequently, MCMB emerged as an efficient adsorbent for arsenic removal.
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
PLASMA CHEMISTRY AND PLASMA PROCESSING
·
2022
·Vol. 43
·期 2
·491-511
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IF 3.337
Huang Shaoyong,Huang Quanjia,Gan Jiaming,Li Ting,Wang Lei
In this study, Fe-rich sludge was pretreated by dielectric barrier discharge (DBD) and used as a Fenton catalyst for the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) in aqueous solution, where hydrogen peroxide was in situ supplied from a glow discharge plasma (GDP) in contact with the solution. Synergistic mechanism of the two plasmas during 2,4-D degradation was explored. The Fe-rich sludge pretreated by H 2 -DBD could significantly accelerate the 2,4-D degradation as it converted Fe(III) in the sludge to the active Fe(II). 2,4-D can be completely removed in the presence of H 2 -DBD pretreated Fe-rich sludge with 25 min of GDP at pH 0 3.0 and catalyst dosage of 1.0 g/L. Quenching experimental studies showed that both ·OH (oxidative degradation) and ·H (reductive dechlorination) were responsible for 2,4-D degradation. Reducing radicals (such as ·R and·H) formed during GDP can continuously reduce the Fe 3+ back to Fe 2+ , which further promoted the degradation and dechlorination of 2,4-D. The results of three consecutive experiments indicated the stability and reusability of catalyst. This study provides a potential method for the recycle of Fe-rich sludge as a novel and cost-effective catalyst for 2,4-D removal from aqueous environments, which is significant for the terminal disposal of Fe-rich sludge. Graphical Abstract
研究领域:
环境科学
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废水处理
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化学工程
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产品关联
DOI
高影响因子
ChemSusChem
·
2020
·Vol. 13
·期 13
·3469-3478
·
IF 7.962
Gang Liu,Yiyao Shen,Peihua Ma,Sijia Zhao,Antoine Bonnefont,Yaokang Lv,Congze Wang,Laurent Ruhlmann,Cheng Zhang
Graphical Wasteful to useful : A series of sludges is produced by using a simple electroflocculation method to deal with industrial printing and dyeing wastewater. The sludges can be directly and effectively made into anodes for Li-ion batteries. The performance of the electrodes can be improved by adding different proportions of super P® conductive carbon black. This strategy not only helps to decrease the cost of waste treatment but also provides a possibility to apply the treatment products in a distributed energy storage device. Iron-containing sludges (DW/Fe) were prepared by the electroflocculation of industrial printing and dyeing wastewater (DW). To investigate the formation process and the properties of the DW/Fe sludges and their application in anode materials in Li-ion batteries, the DW/Fe sludges were compared to three other sludges (MB/Fe, RB/Fe, Ta/Fe) prepared from model solutions that contained either methyl blue (MB), rhodamine B (RB), or tartrazine (Ta). The DW/Fe sludges were calcined at 500 °C under N 2 to form iron oxide/carbon composite C-DW/Fe. The composition and structure of the sludges and the C-DW/Fe composite were analyzed by using FTIR spectroscopy, XRD, thermogravimetric analysis, SEM, TEM, and X-ray photoelectron spectroscopy, and their performances as anodes of Li-ion batteries were studied by adding different proportions of conductive agent (super P® conductive carbon black). Our results show that the sludges are a complex mixture of Fe 3 O 4 and organic matter. The specific capacity and stability can be improved during the charge–discharge test by increasing the amount of carbon black. Importantly, this improvement is more pronounced on DW/Fe that does not require high-temperature carbonization, which means that the sludges cannot only protect the environment and avoid the waste of resources but also can be used directly and widely in decentralized energy storage devices.
研究领域:
环境科学
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材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yong Chen,Huiping Zeng,Jiaxin Xu,Dong Li,Jie Zhang
Currently, there are well-operated iron removal water plants in the northeast region of China. Among them, the backwash process produces a large amount of iron-containing sludge (IS) year by year, which can cause some harm to the environment if not treated. The main form of existence for IS is amorphous γ-FeOOH, and this work demonstrates that IS is a natural and highly active catalyst for periodate(PI). Moreover, IS showed strong stability in environmental factor effects and reproducibility experiments. EPR with quenching experiments proved that IS could activate PI to produce •OH, O 2 •− , 1 O 2 , and IO 3 • . In the degradation experiments where methylene blue was chosen as the model pollutant, IO 3 • , and 1 O 2 were the substances that served the prominent role in degradation. This work provides an inexpensive and feasible way to dispose of waste iron-containing sludge from water plants and provides fundamental insights into the degradation mechanism of organic pollutants through the activation of PI by IS.
研究领域:
环境科学
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化学工程
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废水处理
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shijun Zhu,Wei Wang,Yongpeng Xu,Zhigao Zhu,Zhiquan Liu,Fuyi Cui
Iron sludge produced numerously from drinking water treatment plants can be recycled to create catalyst for peroxymonosulfate (PMS) activation. In this study, iron sludge-derived catalysts were synthesized via one-step pyrolysis process by self-reduction in argon atmosphere. The crystallite structures and catalytic performance of these catalysts were strongly dependent on the pyrolytic temperature. The product carbonized at 900 °C (Fe 0 /Fe 3 C) exhibited a superior catalytic behavior with 99% ciprofloxacin (CIP, 10 mg/L) degradation in 20 min due to the synergistic effect of Fe 0 and graphitic carbon. The influences of reaction parameters on the CIP degradation were further investigated and the Fe 0 /Fe 3 C-PMS process had a wide efficient pH range from 3 to 9. The catalyst also exhibited excellent magnetic property and could be easily separated with external magnetic field. Radical quenching study and electron paramagnetic resonance (EPR) tests indicated that sulfate radical (SO 4 − ), hydroxyl radical ( OH), superoxide radical (O 2 − ) and singlet oxygen ( 1 O 2 ) contributed to the degradation of CIP. This study extended the application of Fe 0 /Fe 3 C to catalytic oxidation of other typical refractory organic contaminants and confirmed its excellent catalytic activity . Overall, this study provided a cost-effective iron sludge reuse method to develop an environment-friendly catalyst for decontamination of organics pollutants, and also to relieve detrimental influences on aqueous environment by discharging the iron sludge.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Xin-Hao Shen,Feng Liu,Qin-Qin Chen,Ying Gao,Xiao-Wen Wang,Xin Liu
The efficient degradation of emerging pollutants in water, represented by CBZ, is receiving increasing attention from all sectors of society. Although advanced oxidation reactions represented by Fenton reaction can efficiently degrade emerging pollutants, the problem of iron sludge that comes with it is hindering the further promotion of this technology. Herein, UiO-66(Zr)-2OH material was synthesized by hydrothermal method and loaded with Pd 0 NPs on the surface of the material by in situ reduction. The MOFs-H 2 -Accelerated Catalytic Fenton system was constructed by accelerating the regeneration of Fe(II) in the system by activating the [H] produced by H 2 introduced into the system at room temperature and pressure. Within 180 min, the removal of the target pollutant CZB could reach more than 99 % under the condition of only 25 µmol of Fe(II) and 25 mmol of H 2 O 2 .
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Yang Hu,Hai-Liang Yang,San-Jian Ma,Juan-Hong Li,Xin Liu,Yong-Jing Tian,Long Jin,Zi-Xia Lin
The promotion of Fenton process in organic wastewater treatment has been hindered by the disposal of large amounts of iron sludge derived from the excess addition of ferrous salt. The operation of the Fenton reaction could be maintained using trace level Fe II through the effective acceleration reaction of active hydrogen. However, the H 2 which is the precursor of active hydrogen is insoluble in water. Herein, the composite catalyst Pd/MOF-808(Zr) was introduced into the H 2 -Fenton system to enhance the adsorption and activation of this reducing gas. In this novel improved Fenton system called MHACF-MOF-808(Zr), the hydroxyl radical would be unceasingly produced based on the unceasingly recycling of FeII/FeIII at normal temperature and pressure. 15 mg L −1 sulfamethazine could be thoroughly degraded during 2 h reaction process in the initial condition of 60 mL min −1 H 2 , 20 μmol L −1 Fe II , pH 3, 20 mmol L −1 H 2 O 2 and 2 g L −1 Pd/MOF-808(Zr). And so did 10 mg L −1 2,4-Dichlorophenol. The activity and stability of Pd/MOF-808(Zr) could be maintained after at least 6 consecutive reaction cycles. It provides new insight for improving the inherent shortcoming of the Fenton reaction which will generate large amounts of iron sludge.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xinyun Zhang,Jian Zhang,Haigang Fu,Minglu Sun,Chenying Zhou,Xiaowei Huo,Chuanshu He,Yang Liu,Peng Zhou,Bo Lai
Resulting from the extremely low rate constant of hydrogen peroxide (H 2 O 2 ) induced Fe III reduction, the slow kinetics of reactive oxygen species (ROS) generation in the second stage of Fenton process and high iron sludge output are the core issue for Fenton technology. In this research, manganese sulfide (MnS) was used as environmentally friendly co-catalyst to promote redox processes in Fenton and Fenton-like processes. MnS can significantly boost Fenton (Fe II /H 2 O 2 and Fe III /H 2 O 2 ) and Fenton-like (Fe III /PMS, Fe III /PDS, and Fe III /PAA) processes to degrade sulfamethoxazole (SMX), while MnS/Fe III /H 2 O 2 outperforms other peroxides involved processes. Qualitative and semi-quantitative ROS analysis reveals that hydroxyl radical is the dominating ROS in MnS/Fe III /H 2 O 2 , resulting in the oxidation of diverse organic contaminants. Based on characterizations and DFT calculations, mechanism investigation unveils that the dual reactive and low valent centers of manganese and sulfur can sustainably donate electron for reducing FeOH 2+ into Fe II with the concerted oxidation of Mn II and S 2− , while in-situ generated Fe II reacts with H 2 O 2 to produce hydroxyl radical for water decontamination. In addition, MnS manifests high co-catalytic stability during long-term operation, due to the electron-rich properties of the dual reactive centers of MnS (Mn II and S 2− ). Therefore, this study proposed a new boosted Fenton process by coupling MnS and Fe III /H 2 O 2 for controlling iron sludge output and realizing high-efficiency water decontamination.
研究领域:
环境化学
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水处理技术
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高级氧化工艺
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催化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Huiping Zeng,Jianxue Li,Jiaxin Xu,Wei Qi,Ruixia Hao,Guowei Gao,Da Lin,Dong Li,Jie Zhang
The widespread use of tetracycline (TC) is a non-negligible cause of environmental pollution , such as antibiotic resistance genes (ARGs). Economical, green and efficient treatment methods are urgently needed. In this study, the magnetic N-doped iron sludge based biochar (N-BCFe) was prepared by a one-step pyrolysis method using the iron-containing sludge from groundwater treatment plants, sycamore leaves and urea as raw materials to active persulfate (PS) for TC degradation . The results show that under the optimal experimental conditions, the removal rate of 10 mg/L TC in the N-BCFe/PS system could reach 86.56% (120 min), accompanied by a 59.9% reduction in total organic carbon (TOC), and still 63.34% of TC was removed in the third recycle experiment. Combined with EPR, free radical quenching experiments and XPS spectra, it is confirmed that there are free radicals ( S O 4 · − , ·OH) and non-radical ( 1 O 2 ) pathways in N-BCFe/PS system. And the former is related to Fe doping, while the latter is attributed to N doping (nitrogen-containing functional groups). Seventeen TC intermediates were identified by LC-MS technology, and three TC degradation pathways were established accordingly. Generally, this study illustrates the considerable catalytic potential of N-BCFe and provides valuable insights into the synthesis of catalysts prepared from iron-containing sludge as feedstock.
研究领域:
环境科学
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化学
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材料科学
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水处理
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mian Li,Lian-Yu Qiu,Tian-Yang Zhang,Bin Xu,Dan Yang,Ting Ye,Heng Luo
Advanced oxidation processes (AOPs) based on Fe 2+ /persulfate (PS) have been widely applied in water treatment but face critical challenges: inefficient radical utilization due to excess Fe 2+ scavenging, unsustainable reactivity from irreversible Fe 2+ -to-Fe 3+ conversion, and ambiguous dominant reactive species (e.g., SO 4 − / OH vs. high-valent iron). Ferric oxalate complexes address these limitations by enabling light-driven iron photoreduction and the Fe 2+ /Fe 3+ cycle. However, direct comparisons of degradation efficiency, mechanisms, and environmental risks between Fe 2+ /PS and UV/Fe(C 2 O 4 ) 3 3− /PS remain scarce. Using iohexol as a model, this study directly compared the two systems. The UV/Fe(C 2 O 4 ) 3 3− /PS system achieved 98.8 % iohexol degradation in 60 min (vs. 69.9 % for Fe 2+ /PS) and reduced iron sludge by 70–80 %. Both systems relied on SO 4 − and OH, but UV/Fe(C 2 O 4 ) 3 3− /PS enhanced radical yield via photocatalytic iron cycling, whereas Fe 2+ /PS depended on Fe(IV). In Fe 2+ /PS, contributions were Fe(IV) (29.4 %) > SO 4 − (25.9 %) > OH (20.2 %); in UV/Fe(C 2 O 4 ) 3 3− /PS, SO 4 − (63.6 %) > OH (23.7 %) > Fe(IV) (23.7 %). Electrical energy per order (EE/O) analysis showed UV/Fe(C 2 O 4 ) 3 3− /PS consumed 1.166 kWh mM −1 , 60.2 % lower than Fe 2+ /PS (2.524 kWh mM −1 ). Acute toxicity tests with Vibrio fischeri exhibited 67.7 % inhibition in Fe 2+ /PS, significantly higher than 36.4 % in UV/Fe(C 2 O 4 ) 3 3− /PS. Ecological Structure-Activity Relationships (ECOSAR) modeling and disinfection by-products (DBPs) risk assessment further confirmed lower risks in UV/Fe(C 2 O 4 ) 3 3− /PS, with 50 % lethal concentration ((LC 50 ) for aquatic organisms 2.3-fold higher and genotoxicity potency 41.7 % lower than Fe 2+ /PS. These results bridge the efficiency-risk gap between the two systems and offer a three-dimensional (efficiency-cost-safety) framework for AOP selection.
研究领域:
环境工程
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水处理
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化学氧化
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毒理学
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自由基化学
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污染控制
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高级氧化工艺
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能源效率
✓ 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）