CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shizong Wang,Jun Hu,Jianlong Wang
This study investigates the treatment performance of saline wastewater using electron beam radiation (EB), comparing it with ozonation. The results indicate that chloride ions (Cl - ) inhibited the mineralization of all the organic pollutants, and the inhibition presented slightly enhancement with the increase of Cl - concentration. Within pH ranging from 3 to 9, Cl - had a minimal impact on the removal of organic pollutants. At pH 3.0 and pH 9.0, Cl - promoted the phenol mineralization when Cl - concentration was 1 and 5 g/L, while decreased the mineralization when Cl - was 10 g/L. Sulfate ions (SO 4 2- ) had no significant effect on removal and mineralization. Similarly, nitrate ions (NO 3 – ) had minor effect on the removal. At 1, 2 and 5 kGy, NO 3 – even enhanced the mineralization. In comparison, Cl - , SO 4 2- , and NO 3 – also had minor effect on the removal of organic pollutants by ozonation, but predominantly inhibited mineralization, except for benzoic acid, where Cl - promoted it. Mechanistic analysis suggests that inorganic ions influenced the types and utilization efficiencies of reactive species during EB, ultimately affecting pollutant degradation. While the effect of inorganic anions on ozonation was not only reflected in the reactive species, but also in the changes in solution ionic strength that further decrease the mineralization. Overall, EB radiation demonstrated superior COD removal and cost-effectiveness compared to ozonation, presenting a viable alternative for saline wastewater treatment.
研究领域:
环境科学
·
废水处理
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DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·255
·
IF 4
Changhui Zhu,Xudong Zhang,Wenling Xu,Yanni Zheng,Baohe Tian,Xi Chen,Wenchao Zhu
To overcome the limitations of conventional catalysts in sterically hindered esterification reactions, a radio frequency (RF) plasma-modifiedSO42−/S2O82−/SnO2-Al2O₃ solid superacid catalyst was synthesized via sol-gel and impregnation, followed by RF plasma treatment and calcination. Comprehensive characterization revealed that the RF plasma modification endowed the catalyst with a uniform particle distribution (4.32 nm average size), larger specific surface area (104.44 m2·g−1), elevated total acid content (142.86 μmol·g−1), and increased oxygen vacancy concentration (16.4%), compared to the conventional sol-gel–impregnation–calcination-prepared catalyst. The RF plasma-modifiedSO42−-S2O82−/SnO2-Al2O3was subsequently applied to perform the esterification reaction of Tyr, with a higher steric hindrance. Mechanistic studies indicated that the plasma-induced surface etching and electronic redistribution/intensified electron-withdrawing capability ofSO42−/S2O82−groups synergistically strengthened Brønsted/Lewis acidity. For the esterification of tyrosine—a sterically demanding substrate—the modified catalyst achieved a 92.1% methyl tyrosine yield under the optimized conditions (180 °C, 0.8 MPa N2, 6 h), where the catalyst exhibited a better mechanical strength and better lifetime with five cycles. This work not only provides a scalable plasma-assisted strategy for tuning solid superacids but also establishes an eco-friendly alternative to traditional catalysts, and was applied to the esterification reactions of some high-steric-hindrance substrates.
研究领域:
催化化学
·
生物有机化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Dingyang Chen,Zhaoli Liu,Shuying Li,Xiaofei Jing,Yuyang Tian,Wei Hu,Fengchao Cui,Rui Zhao,Guangshan Zhu
Developing cationic adsorbents for efficient radioactive pertechnetate ( 99 TcO 4 − ) removal from water is of great significance in both nuclear fuel management and nuclear-related environmental treatment fields. However, tremendous efforts should be taken to improve the comprehensive performance of the adsorbent materials. Herein, novel cationic electrospun nanofibers were synthesized via the blending electrospinning from the branched polyethylenimine based solution and the following quaternization reaction by benzyl bromide. Consequently, abundant specific anion traps with hydrophobic microenvironment were constructed on the fibers. The obtained fiber adsorbents were systematically investigated to remove perrhenate (ReO 4 − ) ions (the nonradioactive surrogate for TcO 4 − ), which exhibit satisfying adsorption performance in several aspects: high adsorption capacity (943 mg g −1 ), fast kinetics (30 min), good removal depth (distribution coefficient = 1.1 × 10 6 mL g −1 ), large dynamic column adsorption volume (1540 bed volume), and excellent ReO 4 − capture from solution with high ionic strength or acidity/alkalinity. The adsorption performance surpassed all macroscopic shapeable adsorbents and many powdery advanced porous materials, owing to their abundant adsorption sites, tailored anion traps and macroscopic fibrous structures. Overall, this work gives a useful insight into designing novel adsorbents for effective TcO 4 − /ReO 4 − capture.
研究领域:
材料科学
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环境科学
·
核能工程
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DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
·
IF 6.1
Qiyi Zhu,Xiaofeng Zhu,Ning Yang,Yuxi Duan,Yuanyuan Wang,Xiaoyu Liu,Di Zhao,Haiyan Fan,Lijie Chen
Root-knot nematodes ( Meloidogyne incognita ) present a significant threat to global agriculture, and the development of multi-drug resistance in these nematodes exacerbates this problem. Benzothiazole, a heterocyclic compound has been reported as a potential nematicide, however, its mode of action is not fully understood. This study aims to elucidate the nematicidal mechanism of benzothiazole against M. incognita . In the toxicity assays, benzothiazole exhibited rapid and effective nematocidal activity, significantly compromising egg masses and inhibiting egg hatching while killing newly hatched second-stage juveniles (J2s) of M. incognita . Microscopic observations revealed that after 48 h of incubation, a marked reduction in protein and carbohydrate levels within the J2s was observed. Notably, benzothiazole at a concentration of 14 mmol/L significantly inhibits glutathione S-transferase (GST) enzyme activity, leading to the accumulation of reactive oxygen species (ROS), ultimately resulting in rapid nematode death. Molecular docking and dynamics simulations demonstrated that benzothiazole forms a stable complex with GST, thereby disrupting its antioxidant function. Furthermore, in pot experiments, benzothiazole effectively reduced the gall formations of M. incognita on tomato roots. Overall, this novel inhibitory mechanism of glutathione S-transferase (GST) differs from that of the neurotoxicant abamectin, which targets glutamate-gated chloride channels (GluCl). This mechanism holds significant promise for the development of environmentally friendly nematicides. It offers a potential solution to the growing problem of multidrug resistance in root-knot nematodes and could help mitigate the substantial economic losses caused by these pests in global agriculture.
研究领域:
农业科学
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害虫防治
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生物化学
·
线虫学
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植物病理学
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产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Lingjie Zhang,Tingting Zhang,Shuaike Lv,Shuai Cheng,Guangfeng Dong,Mildred Quintana,Shaoxian Song,Yunliang Zhao
Lithium-aluminum layered double hydroxide (LiAl-LDH) is the most successful industrialized adsorbents for lithium extraction from salt lake brines with high Mg 2+ /Li + ratios. Nevertheless, its applications in SO 4 2− -type brines hit an “Achilles heel”, i.e., the poor Li + extraction due to the desorption obstacle arising from spontaneous intercalation of SO 4 2− . Herein, a novel strategy of steering interlayer interaction was developed by embedding portion of PO 4 3− into interlayers of LiAl-LDH beads (BLDH-P). Owing to the lower binding energy ( E b ) and stronger diffusion energy barrier of SO 4 2− within interlayers, BLDH-P featured property of preventing SO 4 2− intercalation, with the unchanged adsorption and desorption capacity in Lop Nor brine (the largest SO 4 2− -type brine in the world) during the long-term recycling. BLDH-P also showed excellent Li + extraction performance, as the results of enlarged interlayer spacing and selective electrostatic repulsion. The static and dynamic Li + uptake reached 5.26 mg/g and 3.96 mg/g, with high separation factors of 39.84, 48.14, and 144.87 for Li + /K + , Li + /Na + , and Li + /Mg 2+ , respectively, superior to those of reported and commercialized LiAl-LDH. This work offers a feasible strategy of using interlayer modulation for long-term Li + extraction by LiAl-LDH from SO 4 2− -type brines, and inspires the development and design of next-generation lithium adsorbents.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2014
·
IF 5.481
Yue Liu,Qingfeng Wang,Rongjun Mei,Haiqiang Wang,Xiaole Weng,Zhongbiao Wu
Recently, simultaneous removal of SO2, NOx and oxidized mercury in wet flue gas desulfurization (WFGD) scrubber has become a research focus. Mercury re-emission in traditional WFGD system has been widely reported due to the reduction of oxidized mercury by sulfite ions. However, in multipollutants simultaneous absorption system, the formation of a large quantity of nitrate and nitrite ions as NOx absorption might also affect the reduction of oxidized mercury in the aqueous absorbent. As such, this paper studied the effects of nitrate and nitrite ions on mercury re-emission and its related mechanism. Experimental results revealed that the nitrate ions had neglected effect on mercury re-emission while the nitrite ions could greatly change the mercury re-emission behaviors. The nitrite ions could initially improve the Hg0-emission through the decomposition of HgSO3NO2–, but with a further increase in the concentration, they would then inhibit the reduction of bivalent mercury owing to the formation of Hg-nitrite complex [Hg(NO2)x2-x]. In addition, the subsequent addition of Cl– could further suppress the Hg0 emission, where the formation of a stable Hg-SO3–NO2–Cl complex was assumed to be the main reason for such strong inhibition effect.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Shizong Wang,Jianlong Wang
The effect of common inorganic anions (chloride, bicarbonate, carbonate, nitrate, sulfate and phosphate) on the radiation-induced degradation of sulfamethoxazole (SMX) was investigated. In the absence of anions, the removal efficiency of SMX reached 99.6% at dose of 1 kGy. However, the presence of inorganic anions had obvious influence on SMX degradation, which was dependent on their initial concentrations. Nitrate ions had inhibitive effect, which increased with increase of its initial concentration. Chloride ions showed no obvious inhibition at low concentration, while they had significant inhibition at higher concentration. For bicarbonate, carbonate and phosphate ions, they presented inhibition at low concentration, while they had enhancing effect at higher concentration. The promotion of SMX removal efficiency was observed when the initial concentration of bicarbonate, carbonate and phosphate was 50, 20 and 50 mM, respectively. Quenching experiments proved that hydroxyl radicals made a major contribution to SMX degradation in the absence of anions. However, in the presence of 50 mM of carbonate or phosphate ions, carbonate and phosphate radicals played a key role in SMX degradation. In addition, carbonate and phosphate radicals preferentially attacked the amino group and resulted in the formation of different intermediate products compared to hydroxyl radicals. The results suggested that the effect of inorganic anions on the radiation-induced degradation of sulfonamides antibiotics should be considered when radiation technology is used for the treatment of industrial wastewater.
研究领域:
环境科学
·
药学
·
放射化学
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Min Shi,Yao Wang,Xiaorong Wang,Changping Deng,Wenzhi Cao,Qiang Hua,Guoyin Kai
Tanshinones and phenolic acids are two major groups of natural bioactive compounds in Salvia miltiorrhiza which exert excellent pharmacological activities. Due to low content in S.miltiorrhiza , it is urgent to enhance the production of the two compounds to meet the increasing need. The Arabidopsis basic helix-loop-helix (bHLH) transcription factor MYC2 was introduced into S. miltiorrhiza hairy roots. In the best transgenic line AtMYC2-3 , tanshinone yield was 14.06 mg/g dw which was increased by 5.45-fold more than that in the control line, while phenolic acid production was enhanced to 95.9 mg/g dw, a 3.3-fold increase compared with the control. Transcript levels of some genes involved in biosynthesis of tanshinones and phenolic acids were noticeably upregulated. Dual-luciferase assay revealed that AtMYC2 activated the expression of biosynthetic genes including SmDXS2 and SmTAT . These results revealed that AtMYC2 plays a positive role in accumulation of both tanshinones and phenolic acids which provides a promising strategy for engineering tanshinone and phenolic acid production in S. miltiorrhiza .
研究领域:
植物学
·
分子生物学
·
药用植物学
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 5
·2205
·
IF 4.6
Shengli Shi,Xinsha Zhang,Xianbin Liu,Zhen Chen,Hewen Tang,Dongbao Hu,Hongmei Li
The essential oil (EO) was extracted from aerial parts with insecticidal and fungicidal activity. Herein, the hydro-distilled essential oils ofSeseli maireiH. Wolff roots were determined by GC-MS. A total of 37 components were identified, (E)-beta-caryophyllene (10.49%),β-geranylgeranyl (6.64%), (E)-2-decenal (6.17%) and germacrene-D (4.28%). The essential oil ofSeseli maireiH. Wolff had nematicidal toxicity againstBursaphelenchus xylophiluswith a LC50value of 53.45 μg/mL. The subsequent bioassay-guided investigation led to the isolation of three active constituents: falcarinol, (E)-2-decenal, and octanoic acid. The falcarinol demonstrated the strongest toxicity againstB. Xylophilus(LC50= 8.52 μg/mL). The octanoic acid and (E)-2-decenal also exhibited moderate toxicity againstB. xylophilus(LC50= 65.56 and 176.34 μg/mL, respectively). The LC50of falcarinol for the toxicity ofB. xylophiluswas 7.7 and 21 times than that of octanoic acid and (E)-2-decenal, respectively. Our findings demonstrate that the essential oil fromSeseli maireiH. Wolff roots and their isolates may be developed as a promising natural nematicide.Keywords:Seseli maireiH. Wolff;Bursaphelenchus xylophilus;falcarinol
研究领域:
植物化学
·
植物保护
·
药理学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Environmental Science
·
2016
·
IF 0
Cao Jiling,Feng Youzhi,Lin Xiangui,Wang Junhua
As a crucial reciprocal partner, arbuscular mycorrhizal fungi (AMF) can alleviate the negative effects of a variety of pollutants on their hosts and soil microbes. In our previous studies, such characteristics of AMF on plant growth were documented in response to metal engineered nanoparticle (ENP) treatments. However, the role of AMF in influencing ENP effects on soil microbes remains a matter of debate. To address this issue, we investigated the responses of soil microorganisms to iron oxide nanoparticles (Fe3O4NPs) along a concentration gradient (0.1, 1.0, and 10.0 mg kg−1) in maize plants inoculated with and without AMF. The results showed that a high concentration of Fe3O4NPs significantly decreased the soil bacterial abundance and shifted the community composition, and these negative responses were associated with decreased soil dissolved organic C (DOC) contents in non-AMF-inoculated treatments. However, in AMF-inoculated treatments, no significant changes in soil biota or DOC contents were observed under Fe3O4NPs treatment. These results indicate that AMF alter the effects of Fe3O4NPs on soil microorganisms, possibly by influencing plant growth and organic matter released from plant roots, as DOC contents were impacted by AMF. Our findings suggest that AMF can influence Fe3O4NP-plant-microbe interactions; therefore, more attention should be focused on plant-associated microbes when evaluating the biological effects of nanoparticles.
研究领域:
环境科学
·
微生物学
·
土壤学
·
生态学
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DOI
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Kanying Miu,Yunxiang Meng,Yiqi Yan,Zongsu Wei,Jannis Wenk,Ruiyang Xiao
Advanced oxidation processes involve radical-induced reactions to degrade organic contaminants, and understanding their reaction mechanisms is essential for optimizing and controlling treatment performance. However, the transient nature and complex kinetics of radical systems, characterized by highly branched pathways, make full quantitative mechanism elucidation challenging. Here, the decay kinetics of sulfate and carbonate radicals (SO4•– and CO3•–) were investigated through direct testing of mechanistic hypotheses against observations from time-resolved spectroscopy with a two-loop self-consistent approach. We found that four elementary reactions (SO4•– self-termination and reactions with persulfate PS, H2O, and hydroxyl radical •OH) dominate the decay kinetics of SO4•– in UV/PS systems. In the presence of HCO3– near neutral solutions, the kinetics of CO3•– can be described by its self-termination reaction alone. For comparison, in UV/H2O2/HCO3– systems, two elementary reactions (CO3•– self-termination and its reaction with H2O2) dictate the chemical dynamics of CO3•–. This differential involvement results in 2 orders of magnitude discrepancy in the CO3•– lifetime (9.07 ms and 70.2 μs, respectively) between the two systems. For the first time, direct evidence was presented to discern the elementary reactions involved and quantify the contribution of each elementary reaction to overall radical consumption.
研究领域:
环境化学
·
化学反应工程
·
水处理技术
·
自由基化学
·
光谱学
·
物理化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Yi Zhang,Cai Li,Qin Sun,Cuiling Jiang,Shiming Ding,Musong Chen,Xin Ma,Zhilin Zhong,Yan Wang,Daniel C.W. Tsang
Phosphorus (P) availability is closely related to the distributions of pH, O 2 and phosphatase activities in the rhizosphere of plants growing in soils and sediments. In this study, the P uptake processes and mechanisms of Vallisneria natans ( V. natans ) during two vegetation periods (i.e., week three and six) were revealed using three noninvasive 2D imaging techniques: planar optode (PO), diffusive gradients in thin films (DGT) and zymography. The results showed that increased phosphatase activity, O 2 concentration and root-induced acidification were observed together in the rhizosphere of root segments and tips. In week three, when V. natans was young, the flux of DGT-labile P accumulated more in the rhizosphere in comparison with the bulk sediment. This was because increased phosphatase activity (of up to 35%) and root-induced acidification (with pH decreasing by up to 0.25) enhanced P acquisition of V. natans by the third week. However, the flux of DGT-labile P turned to depletion during weeks three to six of V. natans growth, after Fe plaque formed at the matured stage. The constant hydrolysis of phosphatase and acidification could not compensate for the P demand of the roots by the sixth week. At this stage, Fe plaque become the P pool, due to P fixation with solid Fe(III) hydroxides. Subsequently, V. natans roots acquired P from Fe plaque via organic acid complexation of Fe(III).
研究领域:
植物生态学
·
环境科学
·
土壤学
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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）