Journal of Environmental Sciences
·
2024
·
IF 5.9
Weixu Tang,Jianjian Wei,Shuting Wang,Qiang Cheng,Aroob Abid,Jia Gu,Min Zheng,Dehua Ma
This study aims to identify the highly non-specific toxicity by-products during ozonation of three cresols in wastewater. In ozonated effluents, biotoxicity increased along with increasing reaction time, followed by gradual decrease. The peak biotoxicity for ozonated o -cresol ( o -C), m -cresol ( m -C), and p -cresol ( p -C) was estimated to be 17.4, 14.8 and 5.5 times higher than that of untreated wastewater, respectively. A redox-directed approach with high-resolution mass spectrometry and toxicity prediction revealed that monomeric para-benzoquinones ( p -BQs), hydroxylated p -BQs, and dimeric p -BQs in ozonated cresols were the primary contributors to the increased toxicity. Calculations based on density functional theory indicated formation pathways of p -BQs byproducts, e.g., the formation of 2-methyl- p -benzoquinone was likely induced by ozone molecules rather than hydroxyl radicals in ozonated o -C and m -C, and the formation of p -benzoquinone during ozonation of p -C was attributed to the oxidation of methyl group to carboxyl group and subsequent decarboxylation initiated by hydroxyl radicals. Electron paramagnetic resonance and spin density calculation showed that the presence of carbon-centered cresoxyl radicals was responsible for dimeric p -BQs formation. Collectively, these results underscore significant contribution of non-halogenated p -BQs to non-specific toxicity increase in ozonated effluents.
研究领域:
环境科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Jun Wang,Deyan Wang,Chunxiang Huang,Xueni Sun,Xiaoyong Yue,Hui Shao,Yixin Leng
Isobaric vapour–liquid equilibrium (VLE) data for two binary systems of p-Cresol (PC) + diethanolamine (DEA) and m-Cresol (MC) + DEA were measured at 20.0 kPa. The Herington area method was used to check the binary VLE data, and the results showed good thermodynamic consistency. Meanwhile, the Wilson, NRTL, UNIQUAC models and the chemistry theory proposed by Dolezalek were used to correlate the VLE data. The binary energy interaction parameters for activity models, and reaction equilibrium constants for chemistry theory were obtained. With help of the parameters obtained in this work, the NRTL model was used to predict the VLE data of the two binary systems at the pressure of 8.33 kPa. The predictive results were compared with the literature’s data. At same time, the excess Gibbs free energy for the two binary systems, and infinite dilution activity coefficients for MC and PC in DEA were estimated. The calculated results showed that the DEA had slightly stronger interaction with PC than MC.
研究领域:
化学工程
·
热力学
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DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 32
·3079-3086
·
IF 3.532
Shuang Han,Ruonan Sun,Fu Teng,Yuan Wang,Hongtao Chu,Wei Zong,Yao Chen,Zhonghui Sun
p-Cresol is a harmful phenolic substance that can cause serious effects on human health even at a low concentration in water. Therefore, the detection of p-cresol in a water environment is particularly important. In this paper, a novel zeolite imidazolate framework-67 (ZIF-67) material with regular morphology was prepared on the surface of graphene oxide doped with silver nanoparticles. The composite was modified on the glassy carbon electrode surface to increase the specific surface area, accelerate the electron transfer rate, enhance the current response and improve the performance of electrochemical sensors. Furthermore, a layer of p-cresol-molecularly imprinted polymer was prepared on the surface of the modified electrode by electropolymerization for the selective, rapid and sensitive detection of p-cresol, which greatly improved the specific recognition of p-cresol. Under optimal conditions, the prepared sensor had a good linear range of 1.0 × 10−10 M to 1.0 × 10−5 M with a detection limit as low as 5.4 × 10−11 M, and it presented excellent reproducibility, stability and selectivity. Moreover, the sensor was successfully applied for the detection of trace p-cresol in a real water environment, providing a reliable assay for sensitive, rapid and selective detection of p-cresol in complex samples.
研究领域:
环境科学
·
分析化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Qibang Tong,Jingqi An,Jingcheng Liu,Guixin Wang,Xin Zhou,Wenhao Zhang,Lifang Jiang,Yan Li,Yong Guo
P-cresol ( p -C) is a highly toxic and refractory phenolic pollutant, which is frequently found in industrial wastewater. Since the deficiencies of traditional treatment processes, it is easily transferred to water environment, posing a potential threat to ecological safety and human health. Hence, high-efficiency degradation of p -C in water is an urgent but challenging task. In this study, a kind of low-cost commercial ferrous sulfide (FeS) was employed to activate peroxydisulfate (PDS) for the degradation of p -C in water, and the main impact factors, active species and reaction mechanism were investigated. The results revealed that p -C (20 mg/L) could be thoroughly degraded in 20 min in FeS-activated PDS system over a wide initial pH range of 3.0–9.0, and the mineralization ratio reached 68.8 %. Based on the results of radical scavenging experiment, electron paramagnetic resonance (EPR) trapping experiment and XPS analysis, the mechanism of p -C degradation was proposed. P-cresol degradation in FeS/PDS system mainly follows heterogeneously catalytic oxidation mechanism, in which surface ≡Fe 2+ active PDS to generate surface-bound radicals (SO 4s •– and HO s • ), while the free radicals (SO 4L •– and HO L • ) diffusing from the surface of FeS catalysts to the solution are primarily responsible for p -C degradation, and the HO L • is the dominant one. The sulfur species of S 2− and S n 2− on FeS surface provided electrons to facilitate a continuous ≡Fe 3+ /≡Fe 2+ circulation, promote PDS activation and thus enhance p -C degradation. Conclusively, the FeS/PDS system could have a great potential for the degradation of p -C and the like recalcitrant pollutants in water.
研究领域:
环境科学
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化学工程
·
水处理
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高级氧化工艺
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Shuang Yang,Meiyan Guo,Jiani Yang,Gang Xiong,Baoyi Ren,Fu Ding,Lixin You,Yaguang Sun
In this study, by hydrolysis of the phosphonate esters in these hypercrosslinked polymers (HCPs) made from two bis(α-hydroxyphosphonate) linkers (1, 4-bis[(diethoxyphosphoryl)hydroxymethyl]benzene, 1 ;4,4′-bis[(diethoxyphosphoryl)hydroxymethyl]biphenyl, 2 ) and polyaromatic compounds (9, 9′-spirobi[fluorene], SF; 1, 1′, 2, 2′-tetraphenylethene, TPE; tetraphenylmethane, TPM), respectively, two porous ( SF-1-H and SF-2-H ) and four non-porous ( TPE-1-H, TPE-2-H, TPM-1-H , and TPM-2-H ) hydrophilic HCPs were prepared and characterized in detail. In pure water systems, high adsorption capacities of creatinine and p -cresol on HCPs are exhibited, with saturated adsorption capacities ranging from 96 to 208 mg/g for creatinine and from 82 to 100 mg/g for p -cresol, respectively, with saturation adsorption being attained within 15 minutes. While in the simulated blood system, the porous polymers SF-1-H and SF-2-H show also significant adsorption capacities of creatinine (21 mg/g on SF-2-H ) and p-cresol (21 mg/g on SF-1-H and 24 mg/g on SF-2-H ). The kinetics, thermodynamics and adsorption mechanism of the adsorption process are investigated. This study not only investigated the different adsorption behaviour of creatinine and p -cresol on non-porous and porous materials under different solution conditions, but also provided a method for the preparation of adsorbents with fast and high adsorption capacity, offering new insights for future efficient perfusors.
研究领域:
材料科学
·
化学工程
·
高分子化学
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环境科学
·
生物医学工程
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产品关联
DOI
高影响因子
Bioresource Technology Reports
·
2018
·
IF 0
Hao Li,Zhiling Liu
Hydrodeoxygenation (HDO) is one of the most promising technologies for the biomass pyrolysis oil upgrading, but substantial challenges for the development of efficient HDO catalysts still remain. In this work, the nickel catalysts supported on carboxylic carbon nanotube (Ni/CCNTs-X, X = 1, 2, 3, 4 and 5) with different diameter have been synthesized for the HDO of model compound (vanillin) to p -creosol. As the tube diameters of Ni/CCNTs-X catalysts increased, the catalytic activity increased firstly, and then decreased. The conversion of vanillin over Ni/CCNTs-4 catalyst reached up to 90.0% under mild reaction condition, with a concomitant 87.7% selectivity of p -creosol. The transformation pathway for the HDO of vanillin over Ni/CCNTs-X catalysts involve in hydrogenation, hydrogenolysis and etherification .
研究领域:
催化化学
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能源化学
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生物质转化
·
可再生能源
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环境化学
✓ 已验证
DOI
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Bingxiao Feng,Lining Hao,Chaoting Deng,Jiaqiang Wang,Hongbing Song,Meng Xiao,Tingting Huang,Quanhong Zhu,Hengjun Gai
Catalytic wet air oxidation (CWAO) can degrade some refractory pollutants at a low cost to improve the biodegradability of wastewater. However, in the presence of high temperature and high pressure and strong oxidizing free radicals, the stability of catalysts is often insufficient, which has become a bottleneck in the application of CWAO. In this paper, a copper-based catalyst with excellent hydrothermal stability was designed and prepared. TiO 2 with excellent stability was used as the carrier to ensure the long-term anchoring of copper and reduce the leaching of the catalyst. The one pot sol–gel method was used to ensure the super dispersion and uniform distribution of copper nanoparticles on the carrier, so as to ensure that more active centers could be retained in a longer period. Experiments show that the catalyst prepared by this method has good stability and catalytic activity, and the catalytic effect is not significantly reduced after 10 cycles of use. The oxidation degradation experiment of m -cresol with the strongest biological toxicity and the most difficult to degrade in coal chemical wastewater was carried out with this catalyst. The results showed that under the conditions of 140 °C, 2 MPa and 2 h, m -cresol with a concentration of up to 1000 mg·L −1 could be completely degraded, and the COD removal rate could reach 79.15%. The biological toxicity of wastewater was significantly reduced. The development of the catalyst system has greatly improved the feasibility of CWAO in the treatment of refractory wastewater such as coal chemical wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2025
·
IF 1.6
Shuai Yan,Xin Pu,Zhiyong Qi,Xiaoran Zhang,Xiaoyu Zhou,Xin Han,Lei Ye,Xinglong Qin,Jichang Liu
m -Cresol and p -cresol cannot be effectively separated using conventional distillation because of their proximate boiling temperatures. This study investigated the adsorption separation of cresol using the short b -axis ZSM-5 synthesized via a urea-assisted method. In contrast to the ellipsoidal HZSM-5, which was approximately 1 μm in length, the thickness of the sheet-like HZSM-5 decreased to 36 nm, resulting in an increase in total cresol adsorption capacity from 76 to 122 mg/g. Applying the CLD method, an increase in the TEOS:HZSM-5 ratio from 0 to 0.83 resulted in the increase in p -cresol adsorption capacity from 69 to 106 mg/g, while m -cresol adsorption capacity dropped from 53 to 12 mg/g. The adsorption selectivity significantly rose from 1.3 to 9.7. The adsorption kinetics and isotherms demonstrated that the process was exothermic for p -cresol and endothermic for m -cresol.
研究领域:
材料化学
·
物理化学
·
分离科学
·
催化化学
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jing Cao,Kejun Chen,Fangmei Teng,Jialing Liu,Xinyi Liu,Cen Zhang
Maximizing the exposure of edge sites and achieving sufficient promotion remain arduous tasks for designing efficient bimetallic MoS2-based catalysts. Herein, ultrathin CoMoS nanosheets vertically grown on reduced graphene oxide (CoMoS/rGO–DMF) were fabricated by a facile one-pot solvothermal method using dimethylformamide (DMF) as solvent. The vertically aligned structure and good Co promotion endow CoMoS/rGO–DMF with abundant Co–Mo–S active sites and excellent catalytic performance in the hydrodeoxygenation (HDO) reaction. Consequently, CoMoS/rGO–DMF afforded a conversion of 98.2% and a toluene selectivity of 98.8% at 240 °C, 3.0 MPa, and 4 h in the HDO of 4-methylphenol. In addition, CoMoS/rGO–DMF showed a 3-fold larger turnover frequency value than that of CoMoS/rGO–DW prepared in deionized water. The reusability test of CoMoS/rGO–DMF showed a slight activity loss after six catalytic cycles, which resulted from the surface oxidation by water product, but the HDO performance of the spent catalyst can be easily regenerated by a simple sulfidation process. This work provides new insights for the rational design of sulfide catalysts with excellent HDO activity and arene selectivity.
研究领域:
催化化学
·
材料科学
·
能源化工
·
纳米材料
·
绿色化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Zijiang Zhao,Songtao Huang,Guanglu Dong,Yi Chen,Mingxuan Wang,Molin Xia,Xin Song,Xiaonian Li,Zhongzhe Wei,Jianguo Wang
The hydrogenation of vanillin stands as a pivotal platform reaction within biomass conversion processes, presenting a significant challenge in achieving controlled synthesis of different products. Here, we proffer different methodology for elaborately designing the electronic structure of Pt via regulating the strong metal-support interactions (SMSI) between Pt and Mo 2 TiC 2 , thereby facilitating the targeted synthesis of vanillyl alcohol (VA) and 2-methoxy-4-methylphenol (MMP) from vanillin. Appropriate H 2 reduction can enhance the SMSI between Pt and Mo 2 TiC 2 , promoting the electron transfer from Mo 2 TiC 2 to Pt, resulting in 200-Pt/Mo 2 TiC 2 with 68.1 of Pt 2+ . However, the SR-Pt/Mo 2 TiC 2 obtained through the galvanic replacement strategy possesses 64.7 % of Pt 4+ , which is attributed to the weaker spontaneous SMSI between Pt and Mo 2 TiC 2 . XPS adsorption experiments highlight the pivotal role of Pt 2+ in facilitating the desorption of VA, resulting in the 200-Pt/Mo 2 TiC 2 catalyst demonstrating exceptional selectivity towards VA (96 %). Meanwhile, SR-Pt/Mo 2 TiC 2 showcases a predilection for the direct hydrogenation and deoxygenation of vanillin into MMP. This research not only marks the application of the MXene system to biomass conversion but also illuminates the relationship between the electronic structure of Pt and its selectivity towards VA and MMP.
研究领域:
化学工程
·
催化
·
生物质转化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 6
·1002
·
IF 3.9
Qi Wu,Dejin Zhang,Shu Sun,Chengcheng Liu,Cong Wang
The synthesis 2-tert-butyl-4-methylphenol is of great significance because of its wide application in industry, and the development of a highly efficient catalyst is necessary for the alkylation of p-cresol and tert-butyl alcohol. Here, an efficient and mild method was established. Caprolactam was chosen as the hydrogen-bonding acceptor; p-toluenesulfonic acid was employed as the hydrogen-bonding donor, and a deep eutectic solvent (DES) was prepared to catalyze the alkylation reaction. The structure of the deep eutectic solvent catalyst was characterized by1H NMR spectra, thermogravimetric analysis, and Fourier transform infrared spectra (FT-IR). In addition, response surface design based on the Box–Behnken method was employed to optimize the alkylation reaction process parameters, and the study of reaction kinetics was also carried out subsequently. The recycle performance of the catalyst was evaluated by recovery experiments, and a good result was obtained. By drawing comparisons with the literature reported, we provide a mild method for the synthesis of 2-tert-butyl-4-methylphenol.
研究领域:
化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zhen Chen,Cheng Li,Yating Yu,Youzhi Xu,Minghua Chen
High reactivity between single-crystalline high-nickel LiNi x Co y Mn 1-x-y O 2 cathode materials (Ni-rich SC-NCM) and the electrolyte is considered to be the main cause of fast capacity decay. To prevent direct their direct contact, we utilized a wet coating process to uniformly coat the surface of SC-NCM811 with a layer of brominated phosphoric acid tri-p-cresyl ester (Br-TCP) approximately 6 nm in thickness. X-ray photoelectron spectroscopy analysis of a cycled SC-NCM811 electrode indicates that the Br-TCP coating layer not only plays a key role in reducing interfacial side reactions, but also generates LiBr, a Li-ion conductor, due to reactions with surface lithium sources. The presence of LiBr in the coating layer enhances the lithium-ion dynamics and reduces the impact of coating layer on the lithium-ion diffusion within SC-NCM811. Additionally, the strong ionic bonds of LiBr enable enhanced adhesion between Br-TCP coating layer and SC-NCM811, thereby achieving lasting protection effect. Consequently, the synergistic effects provided by the Br-TCP modification layer are beneficial to delivering excellent electrochemical performance. Specifically, the capacity retention ratio is improved from 8.95 % to 55.28 % over 400 cycles at 1 C. We believe the strategy developed herein can provide valuable guidance in designing advanced surface modified cathodes for high-performance lithium (-ion) batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）