CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Wei Xia,Yuyang Wang,Shaohang Shen,Hu Yang
Harmful algal blooms (HABs) are becoming increasingly frequent in freshwater lakes and coastal water. In this study, a novel actinia-shaped composite coagulant (ATP@CS) comprising cationic starch (CS) and attapulgite (ATP), covalently bonded by a silane coupling agent, was successfully designed and fabricated for HAB mitigation. ATP@CS showed superior performance in the harvesting of Microcystis aeruginosa , a kind of typical algae, with a maximum harvesting efficiency exceeding 98.0%. The embedded ATP in ATP@CS as the weighted inert remarkably improved the settlement properties of the formed flocs. Settling velocity increased with increased ATP content in this composite coagulant, and complete settlement was immediately achieved after coagulation by ATP@CS with an ATP-to-CS mass ratio higher than 2.0. A higher coagulant dosage was required to achieve the optimum alga removal efficiency due to the charge neutralization and bridging effects of the CS as the tentacle of this actinia-shaped composite coagulant. The presence of ATP in this composite coagulant promoted the formation of large, compact, durable, and rapidly regrown flocs during coagulation. ATP@CS as an efficient coagulant has notable potential applications in HAB removal from water owing to its remarkable advantages of enhanced settlement property, high ecological safe, notable HAB removal efficiency, low cost, and environment friendliness.
研究领域:
环境科学
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水处理技术
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DOI
高影响因子
Water
·
2025
·Vol. 17
·期 9
·1342
·
IF 3
Xinyi Zhang,Tian Xia,Ying Meng,Jiaxi Zhang,Gaofeng Chen,Zhaoting Ji,Wenli Qin
Microcystins (MCs) are produced by cyanobacteria blooms in eutrophic water and can cause acute and chronic toxicity and even mortality to animals and humans. Previous MC removal strategies concernedonly highly contaminated water, in which the concentration of the pollutant was considerably larger than that in the natural world. In this study, we developed a composite of TiO2-coated magnetic carbon microtube (C-TiO2-Fe3O4) and used it as a photocatalyst to efficiently remove microcystin-LR (MC-LR) from water under visible light from water. And the huge surface of the carbon microtube dramatically boosted the adsorbability and charge mobility, which lowered the recombination rate of electron–hole pairs, and hence systematically enhanced photocatalytic activity. The combination of adsorption and photodegradation endowed the composite with a better performance in the removal of trace amounts of MC-LR than the C-TiO2. It was found that increasing the contact time and catalyst dosage, acidic environment, and lower initial MC-LR concentration had positive effects on MC-LR removal. The optimum reaction conditions of C-TiO2-Fe3O4was a reaction time of 12.68 min, a catalyst dosage of 0.39 g·L−1, and a pH of 7.72. The C-TiO2-Fe3O4(surface area normalized apparent reaction rate constantsK/SBET= 1.2 × 10−4) presented a higher reaction rate than C-TiO2(K/SBET= 8.4 × 10−5). Moreover, the stable removal capability of C-TiO2-Fe3O4was confirmed over multiple cycles. Finally, the ecological safety performance was also evaluated after visible light illumination. This work paves the way for the development of more efficient and easily separable purifiers for the removal of pollutants and toxins from contaminated water.
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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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Mihebai Yilimulati,Jiyuan Jin,Xin Wang,Xiaomeng Wang,Dmitry Shevela,Bing Wu,Kai Wang,Lang Zhou,Yunlu Jia,Bingcai Pan,Govindjee Govindjee,Shujuan Zhang
Selective inhibition of photosynthesis is a fundamental strategy to solve the global challenge caused by harmful cyanobacterial blooms. However, there is a lack of specificity of the currently used cyanocides, because most of them act on cyanobacteria by generating nontargeted oxidative stress. Here, for the first time, we find that the simplest β-diketone, acetylacetone, is a promising specific cyanocide, which acts on Microcystis aeruginosa through targeted binding on bound iron species in the photosynthetic electron transport chain, rather than by oxidizing the components of the photosynthetic apparatus. The targeted binding approach outperforms the general oxidation mechanism in terms of specificity and eco-safety. Given the essential role of photosynthesis in both natural and artificial systems, this finding not only provides a unique solution for the selective control of cyanobacteria but also sheds new light on the ways to modulate photosynthesis.
研究领域:
环境科学
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微生物学
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植物生理学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Yuanchen Chen,Chuan Yan,Zhe Sun,Yonghui Wang,Shu Tao,Guofeng Shen,Tongqin Xu,Peixue Zhou,Xiaoping Cao,Fusheng Wang,Shuqing Wang,Shoushen Hao,Hefang Yang,Hongjun Li,Quan Zhang,Weiping Liu,Meirong Zhao,Zhibin Zhang
Organochlorine pesticides (OCPs) have been used worldwide on an enormous scale over the last century but are banned globally due to environmental persistence and ecotoxicity in recent decades. The long-term effects of OCP ban for agricultural use in China since 1983 on the reproductive health of small terrestrial mammals have never been evaluated in the field. We examined the residue dynamics of OCPs and the reproductive performance of Chinese striped hamsters (Cricetulus barabensis) in North China Plain during 1983–2010 and concluded that the exposure levels of OCPs in hamsters drastically decreased from 2900 ± 740 to 25.2 ± 6.88 ng/g with an average half-life of 5.08 yrs, coinciding with the observed reproductive recovery of hamsters. The population-based reproductive performance of hamsters was significantly and negatively associated with OCP exposure levels after adjusting the contributions from climate and population density factors, indicating that the ban of OCPs has facilitated the reproductive recovery of hamsters by up to 81% contribution. Our findings suggest that the OCP ban is effective to restore reproduction of small terrestrial mammals. Integration of population biology and environmental science is essential to assess the impacts of persistent organic pollutants on ecological safety and biodiversity loss under accelerated global change.
研究领域:
生态学
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环境科学
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毒理学
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
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IF 7.1
Yaning Wang,Ruimin Xie,Jielin Xu,Zhenguang Li,Mingfa Guo,Fenghuan Yang,Jing Wu,Huaping Wang
Bisphenol-A polycarbonate (BPA-PC) has been widely used, but it has been restricted from use in several food-contact products due to the estrogen-like and antiandrogen effects of BPA. With the aim of developing novel, biobased, and ecologically safe high-performance polycarbonates with the potential to replace BPA-PC, in this work, a series of novel biobased copolycarbonates, viz., poly(isosorbide carbonate-co-isoidide-2,5-dimethylene carbonate) (PIsIeC), were designed and successfully synthesized via melt polymerization. The combination of two isohexide building blocks, the highly rigid isosorbide (IS) and the semirigid isoidide-2,5-dimethanol (IIDML), afforded an optimal candidate (PIsIeC-39) with a nice balance of high Tg (120.5 °C), high tensile strength (72.6 MPa), and also a high elongation at break (75.2%), which are comparable or even surpass the properties of BPA-PC and a few oil-based commercial benchmarks. The SEC/viscosity results and also a DFT simulation jointly revealed that the molecular weights of these copolycarbonates were significantly enhanced when using the two isohexide building blocks together due to a possible autocatalytic effect induced by the hydrogen bonding between IIDML and IS. These polymers were obtained with number-average molecular weights of 27,300–113,200 g/mol and intrinsic viscosities of 54–83 mL/g, which are also comparable to those of BPA-PC. Meanwhile, all copolycarbonates have good transparency similar to BPA-PC and also exhibit similar γ-relaxation and higher biobased content (72–84%). These biobased copolycarbonates with superior thermal and mechanical properties have high potential to be an ecologically safe alternative for BPA-PC.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2022
·
IF 7.129
Xiaoying Yuan,Guomin Geng,Xu Liu,Zucheng Wang,Zhaoxin Wang,Noor Samad Shah,Jianjun Song,Yingshu Guo,Lingshuai Kong,Shuhua Liu,Wenyu Zhang
Cobalt-based catalysts are expected as one of the most promising peroxymonosulfate (PMS) activators for the removal of organic pollutants from industrial wastewater . However, the easy agglomeration, difficult separation, and secondary pollution of cobalt ions limit their practical application. In this study, a novel, highly efficient, reusable cobalt and nitrogen co-doped monolithic carbon foam (Co-N-CMF) was utilized to activate PMS for ultrafast pollutant degradation . Co-N-CMF (0.2 g/L) showed ultrafast catalytic kinetics and higher total organic carbon (TOC) removal efficiency. Bisphenol A, ciprofloxacin, 2,4-dichlorophenoxyacetic acid, and 2,4-dichlorophenol could be completely degraded after 2, 4, 5, and 5 min, and the TOC removal efficiencies were 77.4 %, 68.9 %, 72.8 %, and 79.8 %, respectively, corresponding to the above pollution. The sulfate radical (SO 4 •- ) was the main reactive oxygen species in Co-N-CMF/PMS based on electron paramagnetic resonance. The ecological structure-activity relationship program analysis via the quantitative structure activity relationship analysis and phytotoxicity assessment revealed that the Co-N-CMF/PMS system demonstrates good ecological safety and ecological compatibility. The Co-N-CMF catalyst has good catalytic activity and facile recycling, which provides a fine method with excellent PMS activation capacity for 2,4-dichlorophenol elimination from simulated industrial wastewater. This study provides new insights into the development of monolithic catalysts for ultrafast wastewater treatment via PMS activation.
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
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Yuanqing Wang,Yusong Pan,Shuhuan He,Run Huang
This study reports an innovative europium-iron co-doped bismuth tungstate catalyst (EF-Bi 2 WO 6 ) for rapid organic pollutant degradation through a visible light-driven photo-Fenton process. The results of degradation experiment verified that the 1-EF-BWO catalyst exhibited superior photo-Fenton catalytic activity relative to single-doped and undoped Bi 2 WO 6 , achieving over 99 % degradation of Rhodamine B (RhB) within 6 min, with a kinetic rate constant of 0.9745 min −1 , which was 4.81 times higher than pure Bi 2 WO 6 (0.1678 min −1 ) and 2.42–2.92 times superior to Eu- or Fe-doped Bi 2 WO 6 . Remarkably, 1-EF-BWO maintained consistent degradation efficiency across a broad pH value and diverse ionic environments, showcasing robust operational adaptability. The enhanced catalytic activity is attributed to synergistic electron transfer mechanisms between Eu 3+ , Fe 3+ , and the Bi 2 WO 6 matrix, which optimized band gap structure to facilitate charge carrier separation. EPR spectroscopy revealed that singlet oxygen ( 1 O 2 ), photogenerated holes (h + ), and superoxide radicals (·O 2 − ) served as the primary reactive species driving pollutant mineralization. Reusability tests demonstrated remarkable catalytic stability over multiple cycles. Phytotoxicity assessments revealed that EF-Bi 2 WO 6 -treated wastewater significantly enhanced mung bean germination rates, underscoring its ecological compatibility for sustainable wastewater remediation. These results establish EF-Bi 2 WO 6 as a sustainable, pH-tolerant nanocatalyst with dual advantages of ultrafast degradation kinetics and environmental safety.
研究领域:
环境科学
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纳米技术
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催化
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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
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 1.5
Xiao Yongbo,Gao Yanjiao,Bai Fan,Xiao Jing
Waterborne antibiotics endanger ecological and human health, necessitating efficient treatment. The non-homogeneous catalyst ferrous sulfide (FeS) is readily available and environmentally friendly, capable of effectively activating periodate (PI) to degrade the antibiotic pollutant oxytetracycline (OTC) in water. Therefore, this study systematically investigates the degradation effect of OTC in the FeS/PI system. Through a three-factor (pH, FeS, PI) three-level (–1,0,1) response surface methodology optimization, the optimal reaction conditions were determined as pH 11.07, FeS 1.516 g/L, and PI 1.932 mM, achieving 83.26% OTC degradation efficiency with 39.7% mineralization rate under these conditions. Mechanistic investigations revealed: (1) singlet oxygen ( 1 O 2 ) and superoxide radicals (O 2 •− ) were identified as the primary reactive species (according to radical quenching experiments); (2) LC-MS analysis proposed three potential degradation pathways for OTC; (3) wheat seed germination tests demonstrated the ecological safety of degradation products. The system’s performance could be further enhanced through auxiliary measures: (1) UV irradiation achieved complete degradation; (2) temperature increase (20–50 °C) improved degradation efficiency by 6.76%; (3) ultrasonic treatment provided 0.9% enhancement. Interference resistance tests showed: (1) low concentrations of Cl − (< 10 mM) and HCO 3 − (< 5 mM) promoted the reaction; (2) NO 3 − , SO 4 2− , and humic acid (HA) exhibited negligible effects. Notably, FeS catalyst maintained excellent stability with only 6.6% decrease in OTC conversion rate after five wash-dry-reuse cycles. This technology offers multiple advantages including low energy consumption (ultralow activation energy), high efficiency (potential for complete degradation), and environmental friendliness (no secondary pollution), providing an innovative solution for practical antibiotic wastewater treatment.
研究领域:
环境科学
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化学工程
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水处理技术
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催化
·
污染控制
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Shengnan Li,Mingsi Gao,Heng Dong,Yuxin Jiang,Wanting Liang,Jiwei Jiang,Shih-Hsin Ho,Fengxiang Li
The misuse of antibiotics has increased the prevalence of antibiotic resistance genes (ARGs), considered a class of critical environmental contaminants due to their ubiquitous and persistent nature. Previous studies reported the potentiality of bio-electro-Fenton processes for antibiotic removal and ARGs control. However, the production and fate of ARGs in bio-electro-Fenton processes triggered by microbial fuel cells are rare. In this study, the norfloxacin (NFLX) average residual concentrations within two days were 2.02, 6.07 and 14.84 mg/L, and the average removal efficiency of NFLX was 79.8 %, 69.6 % and 62.9 % at the initial antibiotic concentrations of 10, 20 and 40 mg/L, respectively. The most prevalent resistance gene type in all processes was the fluoroquinolone antibiotic gene. Furthermore, Proteobacteria was the dominant ARG-carrying bacteria. Overall, this study can provide theoretical support for the efficient treatment of high antibiotics-contained wastewater by bio-electro-Fenton systems to better control ARGs from the perspective of ecological security.
研究领域:
环境微生物学
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水污染控制
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分子生态学
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环境工程
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抗生素耐药性
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电化学高级氧化
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Peng Zhao,Haorong Sun,Feixue Gao,Long Yu,Kangle Shang,Ming Fang,Bin Ma,Xiaoli Tan,Suhua Wang,Xiangke Wang
Rapid and accurate detection of nitrite in the aqueous environment is extremely important for ecological safety and human health. In this paper, the Raman detection of nitrite by a NiFe 2 O 4 @Ag sensor in water is enhanced by an extra magnetic field collaborated with surface plasma. Most importantly, it is demonstrated that the magnetic field enhances the Raman peak intensity through not only the effect of magnetic aggregation but also the magnetic field-induced dielectric polarization effect. In this way, the NO 2 − can be detected in a wide linear range from 10 −8 to 10 −3 mol L −1 , and the limit of detection (LOD) can reach as low as 1.25 × 10 −9 mol L −1 , which is 5.69 times lower than that in the absence of an external magnetic field. Similarly, the sensitivity under the magnetic field is 2.65 times that without the magnetic field. In addition, the sensor also shows superior detection ability to NO 2 − in real samples. Given the excellent capability of the magnetic field-enhanced Raman spectra, the reported strategy offers new thoughts on how to enhance the detection ability by an external magnetic field and show the great application potential in real water bodies.
研究领域:
分析化学
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环境科学
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材料科学
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光谱学
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 10
·4179-4190
·
IF 1.6
Wang Yaoxuan,Duan Siyihan,Song Wanrong,Duan Tao,Zhu Lin
The efficient removal of uranium from aqueous solutions is critical for ecological safety. Herein, a novel phytic acid and melamine covalent polymer adsorbent (named PEM) was designed and synthesized through a simple one-pot method, and its adsorption performance and mechanism of U(VI) were systematically investigated. The maximum adsorption capacity on U(VI) achieved 505.05 mg g −1 at pH 4.0, calculated with the Langmuir model, which was much higher than most other adsorbents under the same environment. Importantly, the reaction reached equilibrium quickly in the initial 20 min at 298 K. The sorption process conformed to a pseudo-second-order kinetics model and Langmuir model, indicating that the chemisorption of the monolayer was dominant. Overall, the synthesized PEM could be utilized as an easy, efficient, less time-consuming material for the removal of uranium from acidic nuclear wastewater. Graphical abstract
研究领域:
环境科学
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化学工程
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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）