SCIENCE OF THE TOTAL ENVIRONMENT
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2025
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IF 8
Meng-zhou Wang,Rui Liu,Jin-yan Yang,Aleksander Nikitin
There is an urgent need to develop effective and sustainable methods to decrease sulfonamide (SA) contamination of soil. Herein, a non-homogeneous system of zero-valent metal-biochar-based composites was proposed and tested for persulfate (PS) activation. This system employed zero-valent iron (Fe 0 ) as an electron donor to catalyze the cleavage of the O O bond in PS, thereby generating reactive oxygen species (ROS) that degrade SAs. Notably, the incorporation of elemental sulfur (S) significantly mitigated the passivation of Fe 0 , leading to an enhanced degradation capability of the system. The system decomposes 84–97 % of SAs at their concentration in soil suspension 10 mg/kg in 3 h. Among the coexistence of several SAs, the system showed the fastest degradation rate of sulfisoxazole with a k obs of 0.0305 min −1 , nearing complete removal within 3 h. The system is resistant to the impact of organic matter in soil. It allows to decrease concentration of sulfadiazine in actual contaminated soil on 73 % in 2 h. The system remains effective with decreasing concentrations of PS from 20 mM to 2.5 mM, which lowered the operating cost. T.E.S.T software evaluation showed a significant reduction in the bioaccumulation toxicity and developmental toxicity of the degradation products, suggesting that the system is environmentally friendly. The high efficiency of the catalytic system, the simplicity and economy of the manufacturing process, the resistance to interference in real soil, and the environmental friendliness make this technology promising for mitigating the problem of the environment contamination by SAs.
研究领域:
环境科学
·
土壤修复
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DOI
PubMed
高影响因子
WATER ENVIRONMENT RESEARCH
·
2025
·Vol. 97
·期 2
·e70020
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IF 1.9
Zonglin Li,Junsen Wang,Bomin Fu,Frederic C. Meunier,Mohamad Sleiman,Jean-Marc Chovelon,Hongtao Wang
The waste activated sludge (WAS) generated from sewage treatment accumulates antibiotics including ciprofloxacin (CIP), which may be released into the environments if WAS is not handled properly. Therefore, there is a need to develop technologies aiming at removing CIP from sludge. In this study, electrically activated peroxymonosulfate (E/PMS) was investigated to remove CIP from WAS. The optimal conditions for the degradation of CIP in sludge by E/PMS were determined by response surface methodology (RSM) simulations combined with experimental validation. The highest CIP removal level of 93.8% was achieved in 10 min at a dosage of 250 mg/g dry solid (DS) PMS, and an electrolysis voltage of 23 V. E/PMS facilitated the generation of radicals involved in the elimination of CIP. The contribution of free radicals showed that SO 4 •− is more important than HO • in this process. A degradation pathway for CIP in sludge was proposed based on the detected byproducts and density functional theory (DFT) calculations. The E/PMS process also promoted sludge disintegration, dewatering, heavy metal removal, and morphological transformation. The total content of all six heavy metals decreased, with As and Cr being converted into more stable forms, thereby reducing their leaching rates. The E/PMS process also reduced the toxicity of the sludge filtrate. Finally, the analysis of economic feasibility and energy consumption showed that E/PMS has a significant potential for controlling antibiotics and promoting the harmlessness of sludge. Practitioner Points Effective removal of ciprofloxacin (CIP) from waste activated sludge by electrically activated peroxymonosulfate (E/PMS). Reaction time has little effect on CIP removal from sludge. The degradation sites of CIP in sludge were the piperazine ring, the quinolone fraction, and the cyclopropyl. Promotion of sludge decomposition and dewatering, heavy metal stabilization, and decrease of sludge filtrate toxicity by the E/PMS process. Graphical Ciprofloxacin in sludge was degraded in a direct and indirect way by electrically activated peroxymonosulfate process, while sludge dewaterability was effectively improved.
研究领域:
环境科学
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污水处理
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DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
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2025
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IF 6.5
Jue Wang,Jinyi Yang,Siyu Zeng,Huitao Liu,Fei Li,Haijiao Xie,Senpei Tang,Zaihui Fu,Youji Li
The highly selective synthesis of KA oil (cyclohexanol and cyclohexanone) from the oxidation of cyclohexane (CHA) with O 2 under mild conditions is still a very important and challenging research topic. This paper discloses that the hybrid (DTCN) is easily prepared by inducing carbon nitride (CN) in the synthesis of decatungstate (DT) and is found to be efficiently photo-catalyst for the above selective oxidation in acetonitrile. After illumination (LED of 405 nm) for 2 h, the best DTCN-0.5 can achieve 41.03 % CHA conversion and greater than 95 % KA oil selectivity with an apparent quantum efficiency of 25.52 %, which is much superior to the pure DT (12.46 % CHA conversion). Also, it is active for the selective oxidation of other substrates containing inert C(sp 3 )-H bonds. A series of characterizations, free radical trapping and isotope tracing tests as well as DFT calculations support that the doped CN can construct a built-in electric field with DT to accelerate the separation of the photo-generated charge, thus hoisting the photo-excited quantum efficiency of DT. Furthermore, it also plays a key role in converting O 2 into superoxide (•O 2 – ) radical as the active oxygen donor. Additionally, the doped CN also contributes to the limited participation of water as a weak oxygen donor in the selective oxidation of CHA to cyclohexanol. It is hoped that this work will be informative for advancing the key technology of selective oxidation of saturated hydrocarbons under mild conditions.
研究领域:
化学工程
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材料科学
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Shuyu Chen,Zhengkai Wu,Xueying Cheng,Lu Chen,Yunning Chen,Yingna Guo,Changhua Wang,Qingkun Shang
In this work, we used a simple hydrothermal method to in-situ grow Zn 3 In 2 S 6 on MIL-100(Fe) octahedra, and obtained a MIL-100(Fe)@Zn 3 In 2 S 6 Z-scheme heterojunction photocatalyst. We systematically studied its performance in degrading phenol and p-nitrophenol (PNP) under visible light. MIL-ZIS 6 -2 can remove 89.1 % of phenol within 120 min and nearly 100 % of PNP within 60 min. Its photocatalytic activity to the degradation of phenol is 30.7 times and 1.7 times higher than that of MIL-100(Fe) and Zn 3 In 2 S 6 , respectively. And the photocatalytic activity to degrade PNP is 18.2 times and 1.4 times higher than MIL-100(Fe) and Zn 3 In 2 S 6 . Further research was conducted on its band structure and photocatalytic response mechanism through photoelectric performance, ultraviolet photo-electron spectroscopy, and electron spin resonance spectrometer testing. The results showed that the formation of Z-scheme heterojunction not only increased the specific surface area of the composite photocatalyst, enabling it to provide more reaction sites, but also effectively suppressed the recombination of photogenerated holes and electrons, improving the redox ability of the photocatalyst. This work provides a new perspective for constructing efficient Zn 3 In 2 S 6 -based composite photocatalysts and addressing environmental issues.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
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IF 4.1
Jingyi Shang,Xudong Hu,Shuang Li,Xinhai Wang,Usman Farooq
Antibiotic resistance has emerged in recent years, posing a threat to human health and the environment. There is promising evidence that Fe 3 O 4 nanomaterials can act as catalysts for the breakdown of antibiotics in aqueous systems. Herein, Fe 3 O 4 was synthesized using a hydrothermal technique, and its potential as a catalyst for tetracycline (TC) degradation in the persulfate (PS) system was explored. Highly crystalline (73.4 %) Fe 3 O 4 possessed a prominent octahedral and tetrahedral structure. After testing different combinations of Fe 3 O 4 dosage, PS concentration, pH, and temperature, the optimal conditions for removing about 86.7 % of the TC were 0.20 g/L Fe 3 O 4 , 8.0 mM PS, and pH around 8. In contrast to the more typically seen sulfate (SO 4 •− ) and hydroxyl (OH • ) radicals, quenching tests showed that the non-radical oxo-specie ( 1 O 2 ) predominated in TC degradation, which was also supported by density functional theory (DFT) calculations, when the O O bond was stretched, the free energy barrier of O O bond break (transition state) was 1.2 eV, followed by a thermodynamically favorable process to produce 1 O 2 . However, the reaction energy barrier (2.03 eV) for generating OH • and SO 4 •− on Fe 3 O 4 (4 4 0) was higher, making it difficult to trigger the reaction. Furthermore, electron spin resonance (ESR) tests validated the prominence of the 1 O 2 species in TC degradation. The stability experiments showed that the TC degradation efficiency remained at over 56 % after three cycles. Finally, natural water systems using lake and river water demonstrated that the Fe 3 O 4 catalyst was suitable for practical applications, with more than 70 % TC degradation. Based on these findings, Fe 3 O 4 nanomaterials showed non-radical dominant activation of PS as a potential candidate in practical applications for the degradation of organic pollutants in water systems.
研究领域:
环境科学
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化学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
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IF 6.3
Weiwei Zhang,Su Xu,Yuanjin Zhao,Huan Chen,HuaYing Li,Han Liu
Sulfamethazine (SMT), a sulfonamide antibiotic, is widely present in medical wastewater and is one kind of refractory organic pollutants that endanger the water environment. An efficient and environmentally friendly degradation method is crucial for treating antibiotic wastewater. Based on the strong activation capability of transition metal ions for peroxymonosulfate (PMS) and highly affinity of MoS 2 towards PMS, the decoration of MoS 2 with transition metal ions would be an effective activation of PMS for degradation of organic pollutants. In this work, Co@MoS 2 was synthesized by hydrothermal method and used as catalyst for the degradation of SMT with PMS. Almost 100 % of sulfamethazine (SMT) was removed within 10 min. The EPR and quenching experimental results suggested that 1 O 2 was the main active species for SMT degradation in the Co@MoS 2 /PMS system. The accelerated valence cycle between Co 2+ and Co 3+ was the key factor to PMS activation and SMT degradation. Further, the Co@MoS 2 /PMS system showed good applicability to different pollutants, excellent reusability for SMT removal. Therefore, the results demonstrated that the present study process was a promising strategy for antibiotic removal.
研究领域:
环境科学
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水处理工程
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DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 48
·22273-22282
·
IF 5.8
Feng Li,Kairen Zhao,Yan Jin,Baoxin Li
Currently, water treatment usually requires additional light illumination or oxidants for the degradation of organic pollutants, which increases the costs and is not conducive to practical application. In this study, carbon vacancy-modified Fe–N–C single-atom catalysts (Cv-Fe–N–C SACs) were prepared through one simple acid-etching and pyrolysis process. Interestingly, we found that Cv-Fe–N–C SACs could degrade organic pollutants without any external assistance (such as oxidants or light illumination). The Cv-Fe–N–C SACs could remove over 99% of Rhodamine B (RhB) within 10 min at room temperature. The degradation of organic pollutants with the Cv-Fe–N–C SACs was attributed to their ability to activate dissolved oxygen for producing superoxide (O2˙−). In addition, the catalysts showed high activity over a broad pH range (3–11) and held rather good stability after 5 recycles. This study proved that the Cv-Fe–N–C SACs are highly efficient catalysts for degrading organic pollutants. These catalysts have the potential to make sewage treatment more efficient and less expensive.
研究领域:
环境科学
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催化材料
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Han Zhang,Yinyin Zhang,Luxiang Zhu,Yanan Liu
The frequent detection of 6:2 chlorinated polyfluorinated ether sulfonate (F-53B) in various environments has raised concerns owing to its comparable or even higher environmental persistence and toxicity than perfluorooctane sulfonate (PFOS). This study investigated the plasma degradation of F-53B for the first time using a water film plasma discharge system. The results revealed that F-53B demonstrated a higher rate constant but similar defluorination compared to PFOS, which could be ascribed to the introduction of the chlorine atom . Successful elimination (94.8–100 %) was attained at F-53B initial concentrations between 0.5 and 10 mg/L, with energy yields varying from 15.1 to 84.5 mg/kWh. The mechanistic exploration suggested that the decomposition of F-53B mainly occurred at the gas-liquid interface, where it directly reacted with reactive species generated by gas discharge . F-53B degradation pathways involving dechlorination , desulfonation , carboxylation , C-O bond cleavage , and stepwise CF 2 elimination were proposed based on the identified byproducts and theoretical calculations. Furthermore, the demonstrated effectiveness in removing F-53B in various coexisting ions and water matrices highlighted the robust anti-interference ability of the treatment process. These findings provide mechanistic insights into the plasma degradation of F-53B, showcasing the potential of plasma processes for eliminating PFAS alternatives in water.
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
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kexuan Gao,Doudou Huang,Li-an Hou,Xiaoqiang An,Satoshi Takizawa,Yu Yang
Improving the utilization rate of active sites through rational design of material structure is considered to be an effective way to enhance the activation efficiency and degradation performance of peroxymonosulfate (PMS). Co-sulfate anions-induced layered double oxide/carbon nitride (Co-SLDO/CN) was prepared by sulfate anion induction for the rapid degradation of carbamazepine in the photo assisted persulfate system. Graphitic carbon nitride (CN) provided nucleation sites for Co-SLDH to inhibit its aggregation. Sulfate anions induced the material to transform into three-dimensional flower balls, promoting the formation of oxygen defects, which is beneficial for charge separation and thus promotes more electrons to participate in the catalytic reaction. The synergistic effect of visible light/PMS system and oxygen vacancies (Vo) enabled 100 % degradation efficiency of 10 mg/L carbamazepine (CBZ) to be achieved within 10 min. Among them, the electron transfer of Co (III)/Co (II) promoted the decomposition of PMS to generate SO 4 - •, visible light activated Co-SLDO/CN to produce e CB - and h VB + , and the O 2 in the micro area around the oxygen vacancy captured electrons to generate O 2 • − and 1 O 2 . Seventeen intermediates, such as 10, 11-dihydroxy-carbamazepine, and possible CBZ degradation pathways were proposed, and the overall toxicity was found reduced through experiments, which was consistent with eco-SAR software prediction. After four cycles, the degradation rate of CBZ remained at 100 %, and the system showed good efficiency while degrading various PPCPs, indicating practical application potential.
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
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Yu Gao,Siyu Liu,Xu Huang,Weiwen Lu,Jian Huang,Hua Zhang,Yong Zhang,Jinhua Wang,Shanshan Xi,Jun Liu,Tao Luo
Considering the difficulty in recovering powder materials and the low photocatalytic efficiency, we have developed a series of Fe-MOFs (MIL-53(Fe), NH2-MIL-53(Fe), MIL-101(Fe), NH2-MIL-101(Fe) and MIL-100(Fe)) on pure iron mesh. In this study, the growth of Fe@MILs on the iron mesh was confirmed through SEM, XRD, and FT-IR characterizations. Among the photocatalytic experiments, Fe@NH2-MIL-53(Fe) and Fe@NH2-MIL-101(Fe), which are amine-functionalized, showed improved photocatalytic activity. This improvement is believed to be due to the combination of NH2 functionality and electron transfer to the Fe-O cluster centre, resulting in dual excitation pathways. Furthermore, Fe@MIL-100(Fe) showed the highest performance for the removal of Cr(VI), with over 92% of Cr(VI) being removed in the fifth photocatalytic cycle. Mechanism indicated that the close connection between the compact structure of Fe-MOFs and effective electron migration. Additionally, sacrificial reagent experiments identified two important species for Cr(VI) reduction: electrons (e-) and superoxide radicals (O2-). The photocatalytic recovery tests showed a 97% recovery rate of Cr(VI). This work offers a novel solution for the treatment of water sources contaminated with Cr(VI).
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
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xing Liu,Jing Wang,Yuting Zhang,Gang Guo,Jiakuan Yang,Shushan Yuan,Bart Van der Bruggen
Catalytic ceramic membranes (CCM) have attracted increasing attention in membrane material research due to their catalytic and separation functions. However, it is difficult to obtain stable CCM with excellent catalytic performance via common methods. Herein, SiC ceramic membrane loaded with Co, Cu bimetal were prepared by vacuum filtration method and heat treated at H 2 atmosphere (CoCu@SiC-H CCM). Results confirmed that heat-treated at H 2 atmosphere can enhance the catalytic performance of membrane. The first-order rate constant of the CoCu@SiC-H CCM/ peroxymonosulfate(PMS) system reached 0.01473 ms −1 , which is 10 3 -10 5 times greater than previously researches (0.0409–0.7588 min −1 ). Optimal CoCu@SiC-H CCM/PMS system achieved 98.02 % degradation of sulfamethoxazole in 1 min. The CoCu@SiC-H CCM presents outstanding catalytic performance due to the generation of Co 0 and the increase of oxygen vacancy concentration. OH and SO 4 − play important roles in the CoCu@SiC-H CCM/PMS degradation system. This work provides a new design method for preparing catalytic ceramic membranes with excellent catalytic performance, which can efficiently treat refractory wastewater in harsh environments.
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 Water Process Engineering
·
2024
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IF 6.3
Hao Dai,Ying Han,Xiaolong Rong,Haixia Jiang,Lulu Jiang,Yingang Xue,Wenbin Liu
A novel composite material consisting of black phosphorus nanosheets (BPNS) and titanium dioxide (TiO 2 ) for degrading bisphenol A (BPA) under visible light was investigated. Through a series of photocatalytic experiments and characterization techniques, we found that BPNS/TiO 2 composite materials exhibit excellent BPA degradation ability under visible light irradiation , are capable of degrading 85 % of BPA, and can degrade up to 88.72 % of BPA in acidic environments. The synergistic effect of the composite, combined with the advantages of BPNS, increases the light absorption capacity of TiO 2 . The introduction of TiO 2 can reduce the photogenerated electron-hole pair recombination ability of the composite material and improve the carrier migration ability of the composite material, making it an efficient and environmentally friendly catalyst for BPA degradation. We identified and characterized intermediate products of BPA degradation using high-performance liquid chromatography–mass spectrometry (HPLC–MS) and other study. This process elucidates the potential degradation pathways . The results of this study provide strong support for addressing BPA pollution in the environment and offer a new scientific foundation for the application of photocatalysis technology in environmental protection and wastewater treatment .
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
危险品化学品经营许可证（带存储）