SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Belay Tafa Oba,Xuehao Zheng,Moses Akintayo Aborisade,Akash Kumar,Ashenafi Yohannes Battamo,Jiashu Liu,Azhar Ali Laghari,Peizhe Sun,Yongkui Yang,Lin Zhao
Soil pollution caused by complex organochloride mixtures has been increasing in many parts of the world in recent years; as a result, countless numbers of people are exposed to dangerous pollutions; hence, the treatment of organochlorides-polluted soils is gaining considerable attention. In this study, the potential of unactivated peroxymonosulfate (KHSO 5 ) in remediating soil co-contaminated with trichlorophenol, para-dichlorobenzene, and para-chloro-meta-cresol was investigated. In addition, the treatment's collateral effect on critical soil properties was explored. The result revealed that treating 10 g of soil with 20 mL of 5 mM KHSO 5 for 60 min could oxidize 70.49% of the total pollutants. The pH of the soil was decreased following the treatment. The significant decrease, ( p < 0.05), in the soil organic matter following the remediation has affected cation exchange capacity, and available nitrogen. It was also observed that the treatment reduced the β-glucosidase, urease, invertase, and cellulase activities significantly, ( p < 0.05). The treatment, on the other hand, brought negligible effects on available phosphorus, available potassium, and particle size distribution . The phytotoxicity tests, which included seed germination and root elongation and soil respiration tests revealed that the treatment did not leach toxins into the treated soil. The treatment method was found to be relatively ecofriendly and cost effective.
研究领域:
环境科学
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土壤化学
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污染控制
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植物毒理学
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修复技术
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DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
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2021
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IF 8.071
Belay Tafa Oba,Xuehao Zheng,Moses Akintayo Aborisade,Ashenafi Yohannes Battamo,Akash Kumar,Sheila Kavwenje,Jiashu Liu,Peizhe Sun,Yongkui Yang,Lin Zhao
Calcium peroxide (CaO 2 ) has been proven to oxidize various organic pollutants when they exist as a single class of compounds. However, there is a lack of research on the potential of unactivated CaO 2 to treat mixed chlorinated organic pollutants in soils. This study examined the potential of CaO 2 in treating soils co-contaminated with p-dichlorobenzene (p-DCB) and p-chloromethane cresol (PCMC). The effects of CaO 2 dosage and treatment duration on the rate of degradation were investigated. Furthermore, the collateral effects of the treatment on treated soil characteristics were studied. The result showed that unactivated CaO 2 could oxidize mixed chlorinated organic compounds in wet soils. More than 69% of the pollutants in the wet soil were mineralized following 21 days of treatment with 3% (w/w) CaO 2 . The hydroxyl radicals played a significant role in the degradation process among the other decomposition products of hydrogen peroxide. Following the oxidation process, the treated soil pH was increased due to the formation of calcium hydroxide. Soil organic matter , cation exchange capacity, soil organic carbon , total nitrogen, and certain soil enzyme activities of the treated soil were decreased. However, the collateral effects of the system on electrical conductivity, available phosphorus, and particle size distribution of the treated soil were not significant. Likewise, since no significant release of heavy metals was seen in the treated soil matrix, the likelihood of metal ions as co-pollutants after treatment was low. Therefore, CaO 2 can be a better alternative for treating industrial sites co-contaminated with chlorinated organic compounds.
研究领域:
环境科学
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土壤化学
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污染控制
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2025
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IF 3.5
He Yan,Du Qingwang,Wen Shuna,Yu Tong,Wang Na,Yuan Dingzhong,Na Bing
In this work, an amine functionalized porous organic polymer (POP-ABP-NH 2 ) was synthesized by one-step Friedel–Crafts alkylation reaction using 2-aminobiphenyl as an organic monomer and p-dichlorobenzyl as a crosslinker. Then, POP-ABP-NH 2 was functionalized with different concentrations of phytic acid (PA, 30% and 50%) through hydrothermal reaction, and new phytic acid-modified porous organic polymers (POP-ABP-PA-1 and POP-ABP-PA-2) were successfully synthesized. The adsorption performance of the adsorbents for U(VI) ions in aqueous solution and simulated seawater was studied. The results show that the higher PA concentration, the smaller the specific surface area ( S BET POP-ABP-PA-2 (185.84 m 2 /g) < S BET POP-ABP-PA-1 (598.43 m 2 /g)). This may be because the high concentration of PA occupies more pore sites, resulting in a decrease in specific surface area. The adsorption kinetics of the materials for U(VI) conform to the pseudo-second-order kinetic adsorption model, and the adsorption isotherm conform to the Langmuir monolayer adsorption model. Under the optimal adsorption conditions, the maximum adsorption capacity of POP-ABP-PA-2 for U(VI) (q max = 1372.2 mg/g) is much higher than that of POP-ABP-PA-1 (q max = 769.2 mg/g). This may be because POP-ABP-PA-2 is connected to a high concentration of PA and has a high phosphorus and oxygen content, resulting in stronger coordination ability and higher adsorption capacity. Most importantly, in simulated seawater at pH = 8, POP-ABP-PA-2 exhibited a high theoretical adsorption capacity of 299.4 mg/g in 150 min. In addition, in a solution where many impurity ions coexist, POP-ABP-PA-2 can still exhibit excellent adsorption selectivity for U(VI), and after five adsorption–desorption cycles, the adsorption removal percentage of U(VI) can still be maintained at 90%. This study provides an important research idea for further developing phytic acid (PA) composites for U(VI) adsorption.
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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核化学
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水处理技术
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产品关联
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
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2024
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IF 4.3
Wang Dan,Huang Guifang,Yu Chunming,Wang Yawen,Baek Nawon,Zhu Ruofei
The emergence of environmental endocrine disruptor chlorobenzene (CB) in surface water and its potential environmental impacts have attracted serious global attention. It is still very difficult to achieve effective degradation of it by catalytic oxidation process under mild conditions. Here, an optimized method for degrading CB in aqueous solution using Trametes versicolor laccase and surfactant-assisted laccase-mediator (SALM) system was investigated. The use of a Tween 80 surfactant enhanced the solubility of CB and promoted its efficient degradation. Under favorable conditions, the SALM system yielded a degradation efficiency of 43.5% and a dechlorination efficiency of 41.55% for CB (25 mg/L) within 24 h. The possible degradation pathway of CB by this system was speculated by detecting the intermediates produced during the reaction. The outcome of the proliferation assays on MCF-7 human breast cancer cells demonstrated a reduction in the estrogenic activity of the CB solution following treatment with the SALM system. Furthermore, the influence of the quantity and positional variation of chlorine substituents on the degradation process was methodically investigated. Moreover, molecular analyses were employed to study the detailed interaction mechanism between laccase and CB, which revealed that the hydrophobic interaction contributed dominantly to binding process. These findings provide an efficient and environmentally friendly degradation system for the development of purification strategies for halogenated pollutants.
研究领域:
环境科学
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生物化学
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毒理学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2025
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IF 6
Ting Wang,Yuan-Yuan Cui,Cheng-Xiong Yang
Background As a class of boomingly developed porous material, microporous organic networks (MONs) demonstrated great prospects in HPLC because of their unique structures and excellent stabilities. However, the agglomerated, irregular, and sub-micron sized MONs obtained via the traditional synthesis methods inevitably cause high column pressure and low column efficiency, rendering the main obstacles for their applications in HPLC. Monolithic column has the characteristics of continuous porous structure, fast mass transfer rate, excellent permeability, and low column pressure. Therefore, the integration of MONs with monolithic column should be a potential way to extend the widespread applications of MONs in HPLC. Results In this work, we reported the first example of fabricating MON incorporated monolithic columns by employing methacrylic acid as the monomer, ethylene dimethacrylate as the cross-linking agent, and polyethylene glycol-6000 as the porogen for the improved HPLC separation of small organic molecules. Effects of preparation conditions for MON incorporated monolithic column, sample loading mass, column temperature, and mobile phase composition were studied in detail. MON monolithic column after MON incorporation exhibits improved permeability, column efficiency, hydrophobicity, and specific surface area. Diverse small organic molecules such as polycyclic aromatic hydrocarbons, alkylbenzenes, acidic phenols, basic amines, phenylurea herbicides, parabens, phthalates, and flavonoids were successfully separated on MON incorporated monolithic column (50.0 mm length × 4.6 mm i.d.). MON incorporated monolithic column also provided better resolution and selectivity than C18 packed column. Significance This work reported the first combination of MON and monolithic column for efficient HPLC separation of variety small organic compounds with good resolution, selectivity, and precisions based on typical reversed phase mechanism. The experimental results demonstrated the great potential of MON incorporated monolithic column for enhanced HPLC separation of small organic compounds and could extend the new applications of MONs in separation science.
研究领域:
分析化学
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分离科学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yang Liu,Jian Li,Jiawei Liu,Changwei Tang,Quan Bai
Metal-organic frameworks (MOFs) are promising packing materials in liquid chromatography, but their micropore character extremely prevents the separation performance. Herein, we proposed an acidic etching strategy to fabricate a hierarchically porous University of Oslo-66 (HP-UiO-66) coated silica shell-core composite by using phosphoric acid as an etchant. The prepared composite, namely HP-UiO-66@silica-PA, was characterized by SEM, TEM, FT-IR, and N 2 -adsorption–desorption isotherms, demonstrating the generation of mesopores in HP-UiO-66 shell with pore width ranging in 4–5 nm. The chromatographic performance of HP-UiO-66@silica-PA-1 (etched by 1 mL phosphoric acid for 2 h) as HPLC stationary phase was evaluated in reversed-phase mode, and the separations of three groups of small solutes were studied and compared with the microporous UiO-66@silica (MP-UiO-66@silica) column. The results proved the obviously improved performances with narrower peak width, better resolution, and higher symmetry were achieved by the HP-UiO-66@silica-PA-1 column. The faster diffusion and mass transfer kinetics in the HP-UiO-66 shell signally reduce the plate height and improve the column efficiency. Specifically, the plate number of o -xylene was 18,442 plates m −1 , which was about 18.5 times higher than that on the MP-UiO-66@silica column (993 plates m −1 ). Furthermore, good repeatability and reproducibility with RSDs of both retention time and peak area less than 0.5 % confirmed the high stability and outstanding reliability of the HP-UiO-66@silica-PA-1 column. This study demonstrates that the phosphoric acid etching strategy is simple, mild, and controllable to fabricate hierarchically porous MOFs-based stationary phase for enhancing the HPLC separation performance.
研究领域:
分析化学
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材料科学
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色谱
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2024
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IF 4.8
Wei Chen,Pengfei Wang,Weike Jia,Huidan Zeng
Improving the zeolite adsorption separation efficiency of individual xylene isomer with high purity from their mixture is still a pressing challenge in the fine chemical industry. Herein, plate-like silicalite-1 (p-S-1) zeolite crystals with short b-axis thickness have been successfully synthesized by combination of tributylphosphine oxide (TBPO) modifier and F − -assisted crystallization method to first investigate the separation property of xylene isomers. The morphology and structure of the p-S-1 zeolite crystals were characterized by XRD, FTIR, BET, SEM and TEM. The results showed that the p-S-1 zeolite crystals with thickness of about 50 nm along the b-axis and high crystallinity, as well as extremely rich micropores, were obtained by crystallizing the gels with TBPO/SiO 2 ≥ 0.04. By static adsorption experiment and fixed bed experiment, xylene isomers selective adsorption separation property of the p-S-1 zeolite crystals prepared at TBPO/SiO 2 = 0.04 was investigated. The static adsorption experiment demonstrated that the p-S-1 zeolite crystals exhibited higher adsorption capacity of p-xylene (p-X) and more excellent xylene isomers separation performance than that of the bulk coffin-shaped silicalite-1 (c-S-1) zeolite crystals because of the shorter mass transfer channel and larger diffusivity differences between p-X and o-X/m-X/EB. The dynamic adsorption experiment in simulated five-component solutions diluted by isooctane (IO) indicated that the p-S-1 zeolite crystals had excellent xylene isomers selective adsorption separation performance. The optimum dynamic xylene isomers selective adsorption separation factors for p-X/o-X, p-X/m-X and p-X/EB were 25.41, 36.45 and 11.57 at 150 °C, respectively. The regeneration experiment also indicated that the p-S-1 zeolite crystals had more stable structure and longer lifetime. This work suggested that the p-S-1 zeolite crystals had great potential as new adsorbent for selective adsorption separation of xylene isomers.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Pan Yang,Jinlan Tang,Zhuorui Ding,Yiqun Chen,Zizheng Liu,Jianping Yuan,Yuhua Zhu,Pengchao Xie
Carbocatalysts, widely regarded as eco-friendly catalysts in the field of peroxymonosulfate (PMS) activation for pollutant removal, exhibit significant variations in performance depending on the type of carbon atom hybridization. Notably, the novel graphdiyne (GDY), characterized by its sp-hybridized carbon (sp-C), has recently garnered significant attention. However, the precise mechanistic role of sp-C on PMS activation remains unclear. Herein, we elucidate the role of sp-C on PMS activation and the corresponding mechanism behind enhanced phenolic pollutant degradation over the GDY catalyst. GDY demonstrates exceptional phenolic removal efficiency (97 %), which far exceeds that of traditional sp 2 -hybridized graphene (2 %). The GDY facilitates pollutant oxidation via a catalyst-mediated electron transfer mechanism. The sp-C provides additional sites for PMS adsorption and donates significantly more electrons from GDY to PMS (0.51 e more than graphene), effectively facilitating PMS activation, intermediate species conversion, and reaction kinetics during phenolic pollutant degradation. By integrating the monolithic GDY catalyst into a flow-through device for continuous phenolic pollutant removal, long-lasting phenolic removal was maintained for over 80 hours, with a removal rate exceeding 85 %. This work highlights that sp-C in GDY effectively enhances PMS activation, providing a pathway for efficient organic pollutant degradation in advanced oxidation processes.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Xupeng Li,Hyeon Keun Cho,Shuai Yang,Shuwei Li,Gang Wang,Young Moo Lee
This research was dedicated to the development of high-performance proton exchange membranes (PEMs) via the synthesis of two sulfonated poly(benzothiazole)-b-poly(benzimidazole) (sPBTx-PBI) block copolymers.The structural difference between them is primarily in the length of their hydrophilic chains. Excellent solubility was achieved through the incorporation of hexafluoroisopropyl and phenylphosphine oxide units. Partially cross-linked PEMs (sPBTx-PBI-y) were subsequently fabricated via thermal cross-linking of the hydrophobic PBI segments. The elongation of the hydrophilic block was found to promote water uptake, swelling, and proton conductivity at the expense of oxidative stability. Cross-linking effectively mitigated swelling and greatly improved durability while preserving high proton conductivity. The proton conductivity of the sPBT12-PBI-20% membrane reached 0.115 S cm −1 at 80 °C and 100% RH—exceeding Nafion 117—and maintained a stable operating voltage of 0.79 V over 20 h. Under anhydrous 200 °C conditions, single-cell power densities reached up to 510 mW cm −2 . These results demonstrate that partially cross-linking of sPBT-PBI block copolymers provides a promising pathway toward mechanically robust and highly conductive PEMs for wide-temperature fuel cell applications.
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高影响因子
TALANTA
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2025
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IF 6.1
Liwu Gan,Xiaoying Feng,Suxin Zhou,Jinglin Chen,Juan Zheng,Gangfeng Ouyang
Functionalized metal organic framework (MOF) and covalent organic framework (COF) composites (MOF@COFs) with complementary advantages, hierarchical pores, pre-designable and tunable structures, are expected for remarkable adsorption of organic pollutants, yet to be explored. Herein, a kind of MOF@COF composite was synthesized by combining the parent MIL-68(In) and COF–V (10 %-MIL-68@COF–V), characterized with well-retained crystallinity and hierarchical pores. The parent materials and as-prepared MIL-68@COF-Vs were further fabricated as solid phase microextraction (SPME) coatings to study their extraction performance for Cl/Br-substituted organic pollutants. The 10 %-MIL-68@COF–V coated fiber exhibited the most outstanding enrichment performance for Cl/Br-substituted organic pollutants mainly due to the synthetic advantages, which was 1.1–196.5 times superior than that of the commercial PDMS coating. By combining it with gas chromatography-mass spectrometry (GC-MS), an ultrasensitive method was established, exhibiting wide linear ranges (1–5000 ng L −1 ), low LODs (0.17–0.29 ng L −1 ), and good reproducibility. The trace Cl/Br-substituted organic pollutants in marine water samples were successfully detected, verifying the practicability of the developed method in environmental monitoring.
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
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Mingxi Yang,Zhenlong Zhang,Huafang Zhang,Yuefeng Liu,Huiping Gao,Yanli Mao
The two-step sequential deposition method has been widely applied to fabricate the perovskite films due to its better reproducibility and easy operation. The perovskite film is formed by a reaction of the pre-deposited PbI 2 film with organic amine salts. Therefore the microstructure and crystal orientation of the pre-deposited PbI 2 are crucial for preparing high-quality perovskite film. However, controlling the growth of the pre-deposited PbI 2 is a challenge. Herein, we added an additive of 1, 4-dichlorobenzene (DCB) to the PbI 2 precursor solution. The DCB molecule connects two crystal planes of the PbI 2 through an interaction between the Pb 2+ and the two Cl − in DCB, which induces the formation of a layered structure PbI 2 , and the growth along with the (001) plane to form an orientated PbI 2 film. Thus high-quality perovskite films with reduced defect states, improved charge transfer efficiency, and better energy level structure were obtained. Consequently, a high efficiency of 24.27% was achieved for the perovskite solar cells (PSCs) with DCB additive. Moreover, the stability of the PSCs was improved. The unencapsulated devices remain 82.6% of the initial efficiency after aging for 1100 h in air.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2025
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IF 4
Jinhua Xu,Minghui Tang,Jinyu Zhang,Wenmin Zhang,Shiye Xie,Lan Zhang
This study reports the synthesis and application of a flower-like chiral metal-organic framework (CMOF) based on copper ions and tryptophan (Cu(Trp)-CMOF). The Cu(Trp)-CMOF was successfully synthesized at room temperature through a facile method with hexadecyl trimethyl ammonium bromide (CTAB) as a structure-directing agent. The material exhibits a flower-like morphology with hierarchical porosity and well-defined crystallinity in the monoclinic P2 1 /c space group. Comprehensive characterization revealed that different optical configurations ((R)-type, (S)-type, and (RS)-type) could be selectively obtained by controlling the chirality of tryptophan ligands. The synthesized CMOFs demonstrated excellent performance in two key applications: colorimetric recognition of amino acid enantiomers and separation of volatile organic compounds (VOCs). When used as a chromatographic stationary phase, the CMOF significantly enhanced the separation of challenging structural isomers, particularly improving the resolution (R S ) of xylene isomers (R S from 1.03 to 2.62) and ethyltoluene isomers (R S from 4.83 to 9.23) compared to conventional columns. This work provides new insights into the design and application of CMOFs for chiral separation and recognition.
研究领域:
材料科学
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化学
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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）