SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Chengyu Duan,Jianyu Wang,Qikai Liu,Yi Zhou,Yanbo Zhou
Salbutamol (SAL) and Atenolol (ATL), two common medical ingredients acting on adrenal receptor, are often used for treating chronic illnesses. However, the incomplete metabolism in organism and widespread utilization lead to unneglected problems of water pollution, which the traditional treatment plant cannot satisfactorily deal with. For efficient removal of SAL and ATL, a kind of silanized β-cyclodextrin compound adsorbents (GD-EDTS) was designed based on the ionization features of two pollutants. Through an introduction of rich carboxyl groups by N-[(3-Trimethoxysilyl)propyl]ethylenediamine triaceticacid trisodium salt (EDTS), GD-EDTS surface obtains an appropriate electronegativity to meet different forms of IOCs and maintain a good adsorption performance in a wide pH range. The maximum adsorption capacities of SAL and ATL are 140.24 mg/g and 236.92 mg/g, respectively. And a remarkable rise is known from the adsorption capacity of SAL and ATL increasing to 162% and 706%, respectively, after EDTS modification. Adsorption data fit the Sips adsorption isotherms and the pseudo second-order kinetic model, and a weak competitive behavior between SAL and ATL indicates two pollutants can be removed simultaneously by GD-EDTS in their binary system. In this work, GD-EDTS is suggested to be an efficient adsorbent in the removal of SAL and ATL.
研究领域:
环境科学
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药物化学
·
吸附材料研究
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Li Yin,Zhenguo Liu,Yufu Yang,Yang Guo,Guanying Zhang,Fangyuan Gai,Yuhui Ao,jieran Liu,Bingjing Xin,Yunling Liu
Organic dyes pollution of contaminated water is posing serious environmental crisis. In this work, the robust absorbent of organic dyes has been proposed by using carboxyl-modified carbon fiber (CF) cloths as scaffolds to structure ZIF-8 powder with specific shape (area: 10 × 10 cm 2 and thickness: 2 mm). The grinding ZnO and 2-methylimidazole powder was deposited on –COOH groups functionalized CF-cloth via an in situ non-solvent synthesis process without using binder. This as-synthesized robust absorbent was assembled layer-by-layer with four folds of ZIF-8 layers by inserting three folds of CF (3k, T300) between ZIF-8 layers. The surface microstructure of ZIF-8 and robust absorbent has been investigated and compared by X-ray diffraction. The techniques including Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and X-ray photoelectron spectroscopy (XPS) have been proposed to confirm the interfacial adhesion and surface modification of CF cloths layers in robust adsorbent. Moreover, compared to ZIF-8, CF-ZIF-8 composite exhibited improved thermal stability by the thermal gravimetric (TG) analysis. The CF-ZIF-8 composite exhibited two types of adsorption curves by using UV absorption spectra , which could discriminate six kinds of organic dyes by charge effect. The UV absorption of MB(Methylene Blue), CV(Crystal Violet) and TB(Toluidine Blue) dropped dramatically and exhibited only 4.5%, while the UV absorption of RB19 (Reactive Blue 19), RhB (Rhodamine B) and MO (Methyl Orange) exhibited 58.2%, 58.3% and 70.0% of original absorption intensity after conducted adsorption processes of 700 min, respectively. The as-synthesized robust adsorbent would be easily adapted and recycled from wasted water of real industry fields, which may attract more attentions to build the bridge between MOFs powder materials to carbon fiber cloth for real use.
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
CHEMOSPHERE
·
2019
·
IF 5.108
Biyuan Liu,Yujie Zhan,Ruijie Xie,Haibao Huang,Kai Li,Yuxuan Zeng,Rajendra P. Shrestha,Nguyen Thi Kim Oanh,Ekbordin Winijkul
Conventional gas-solid photocatalytic oxidation (SPCO) of VOCs has drawbacks such as accumulation of intermediates and catalytic deactivation. In this study, gas-liquid photocatalytic oxidation (LPCO) was exploited to improve the catalytic activity and stability by continuously bubbling VOCs into water. Toluene and commercial TiO 2 (P25) were chosen as the representative VOC pollutant and photocatalyst, respectively. Toluene removal efficiency in LPCO was about 6 times of that in conventional SPCO, and no intermediates were detected in the exhaust of LPCO probably due to its high degradation and mineralization rates. However, plentiful intermediates were identified by GC-MS and ITMS both in the gas outlet and on the surface of catalyst in SPCO, which may lead to photocatalytic deactivation. Moreover, LPCO exhibited superior catalytic activity towards typical soluble VOCs such as formaldehyde compared to SPCO. The soluble intermediates formed from toluene degradation can be easily removed by sustaining UV irradiation to avoid water pollution and the water after purification can be reused in LPCO. This study provides a novel gas-liquid photocatalytic oxidation to replace conventional gas-solid photocatalytic oxidation for the sake of better catalytic activity and fewer by-products.
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
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Xuelian Liu,Min Ye,Fangyuan Lin,Ling-ou Yang,Jie Lin,Yaqi Jiang,Dongjie Tian,Xi Chen
Ammonia (NH 3 ) is a common pollutant in water and an important indicator of environmental pollution. Its determination is of great significance to environmental protection. We synthesized ligand-free Cs 2 AgInCl 6 :Bi at room temperature to establish a low toxicity, rapid, and simple fluorescence assay for the selective determination of NH 3 in water. Studies have shown that there is a good linear relationship with the concentration of NH 3 in the range of 1.00 ∼ 20.00 mg L -1 and the determination limit is 0.40 mg L -1 . The selectivity for NH 3 is higher than other substances may exist in the water (eg. Na + , SO 4 2- ). Subsequently, X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, time-resolved fluorescence spectroscopy and ultraviolet absorption spectra were used to investigate the possible mechanism of NH 3 reaction with Cs 2 AgInCl 6 :Bi. The water samples of lakes and rivers were analyzed by the proposed method and indophenolblue method, the results shown that there is no significant difference between the two methods. The reliable results (0.1%< RSD < 4.1%) and the satisfactory recovery (99.0%∼102.5%) were obtained by direct determination method and mark recovery method. Therefore, the simple, rapid and low-toxicity fluorescence method established in this work provides a promising approach for NH 3 analysis in environmental water.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
Science of Advanced Materials
·
2020
·Vol. 12
·期 7
·1078-1089
·
IF 1.117
Xu Hongna,Jin Liguo,Cheng Yan
Metal organic skeleton (MOFs) is a kind of porous material composed of metal ions and organic ligands through coordination, which can be used to absorb a lot of toxic substances from waste water. In this research, UiO-66, UiO-66(Zr) and UiO-66(Zr)–2COOH were synthesized by solvent
thermal method, and physical analysis was conducted on the adsorbent properties of the materials by means of XRD, IR, Zeta potential, etc. In the adsorption test of wastewater impurities, UiO-66(Zr)–2COOH was firstly taken as the research object. With the increase of the initial concentration
of hydrochloric acid, the adsorption capacity of the organic skeleton was greatly increased. However, when the concentration increases further, the growth rate of adsorption decreases, and with the increase of temperature, the adsorption decreases further. The organic skeleton of Hg(II) adsorption
process conforms to the secondary dynamic adsorption model. At the same time, the organic skeleton materials of Hg(II) has strong ability of recognition, the recognition of Hg(II) sex is much stronger than the Ni(II) identification. Uio-66(Zr) and UiO-66(Zr)–2COOH are selected for adsorption
of As, and the adsorption process of the two kinds of materials of As is close to the Freundlich model(III). The ability of absorbing As(III) of these materials is stronger than the ability of As(V). At the same time, UiO-66(Zr)–2COOH shows higher adsorption capacity on the As(III),
and maximum adsorption capacity is 220 mg/g.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Jiamin Yu,Yan Kang,Wenjun Yin,Jinlin Fan,Zizhang Guo
Antibiotic pollution in water is an urgent environmental problem. A novel carbon adsorbent derived from powdery puffed waterfowl feather (PPWF)-doped Phragmites australis (PA) was proposed for enhancing the removal of antibiotics from water in this study. Amoxicillin (AMX) and cephalexin (CEX) were selected as typical antibiotics. PPWF-doped (FPAC) and -undoped (PAC) carbon adsorbents were developed to test the adsorption capacities and mechanisms of AMX and CEX. Characterization techniques such as N2 adsorption/desorption, Fourier transform infrared, X-ray diffraction, scanning electron microscopy, elemental analysis, and Boehm titration were used to determine the properties of adsorbents. Results showed that more microporous structure and surface functional groups are exhibited in FPAC compared to PAC. The nitrogen-containing functional groups were introduced in FPAC. Adsorption capacities at different contact times, pH, and initial concentration were investigated by batch experiments. The AMX and CEX maximum adsorption capacities of FPAC are 25.2 and 30.1% higher than those of PAC, respectively. The kinetic data were well represented by the pseudo-second-order model for AMX and CEX adsorption. The equilibrium data agreed well with the Langmuir model for AMX adsorption and the Freundlich model for CEX adsorption. The adsorption mechanism of AMX and CEX was chemisorption, such as electrostatic attraction and covalent bonding.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF SOIL SCIENCE
·
2024
·Vol. 75
·期 5
·e13572
·
IF 4
Shujuan Zhang,Xinlong Chen,Yuexiao Dong,Jingfan Qi,Zhaoyang You
Whether farmers should consider the role of arbuscular mycorrhizal fungi (AMF) in agriculture is a hotly debated topic. We aimed to investigate the role of indigenous AMF in reducing nitrogen (N) loss from paddy fields via runoff, leaching, NH 3 volatilization, and N 2 O emission. We conducted a pot experiment employing a mycorrhiza-defective rice mutant (non-mycorrhizal) as the control, grown in soil containing indigenous AMF. The corresponding AMF treatment used the progenitor of this mutant with the same soil. The plants were fertilized with nitrogen, phosphorus and potassium 6 weeks after sowing. The root colonization was 23% in mycorrhizal rice, and no typical AMF structures were observed in the roots of non-mycorrhizal rice. Our findings indicated that the mycorrhizal system exhibited lower N concentrations of runoff and leachate further compounded by reduced fluxes of N 2 O and NH 3 . This led to 14% decrease (mycorrhizal rice 111 kg N ha −1 ; the non-mycorrhizal rice: 129 kg N ha −1 ) in cumulative N loss within 3 days post-fertilization. While this AMF effect was consistent across the four tested N loss pathways, differences were observed between NH 4 + -N and NO 3 − -N in the runoff pathway. Notably, our results revealed no evidence of trade-offs in AMF effect on N loss among the tested pathways. Additionally, mycorrhizal rice had larger shoots and roots than their non-mycorrhizal counterparts. Our study underscores the potential benefits of indigenous AMF in paddy fields for mitigating water pollution and reducing greenhouse gas emission.
研究领域:
农业生态学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Honglei Zhao,Jiye Hu
Photodegradation behavior of a new fungicide isopyrazam in water under simulated sunlight and ultraviolet (UV) irradiation was studied. The photolysis half-life (t1/2) of isopyrazam in purified water was 195 h under simulated sunlight, which was decreased to 46–88 h, 28–51 h, and 13–18 h in the presence of NO3–, Fe3+, and riboflavin, respectively. UV irradiation accelerated the photolysis of isopyrazam with a half-life of 30 min and revealed varied degradation rates in acidic (0.011 min–1), neutral (0.024 min–1), and alkaline solutions (0.022 min–1). Nine transformation products under simulated sunlight and UV were found, and photolytic pathways were proposed to include cleavage of C–N bonds, hydroxylation, nitration, demethylation, dehydrofluorination, and photoisomerization. The acute toxicity of defluorinated isopyrazam (TP 4) and the chronic toxicity of isomerized isopyrazam (TP 9) to aquatic organisms were approximately twice that of isopyrazam. These findings provide insights into environmental risk assessment and management of water pollution.
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
JOM
·
2023
·Vol. 75
·期 12
·5606-5618
·
IF 2.6
Wang Jiuling,He Dandan,Chu Ling,Zhang Yupeng,Zhang Wenbo,Zhang Hong
The massive use of antibiotics has led to contamination of water resources, and concerns have been raised about how to treat antibiotic residues in water. In this study, a novel magnetic attapulgite composite (Fe@APT) was prepared by facile chemical precipitation. The characteristics and properties of Fe@APT were revealed by TEM, XRD, FTIR, XPS, BET, VSM, zeta potential, and batch adsorption experiments. The specific surface area of Fe@APT could reach 246.27 m 2 /g, which was about 1.8 times higher than that of APT. And the adsorption of tetracycline (TC) by the composite was shown by kinetics and isotherms to reveal the mechanisms, such as electrostatic attraction, physical adsorption, hydrogen bonding, π – π interaction, complexation, and electron transfer. The effects of pH and ions coexistence on the removal of TC by Fe@APT were also investigated. Specifically, the pore structure of Fe@APT was ameliorated and abundant active adsorption sites were obtained by the modification. The results showed that the maximum adsorption capacity reached 177.94 mg/g when the pH was 4, and it also exhibited good adsorption capacity under the interference of coexisting ions. Furthermore, the adsorbent displayed excellent recycling performance with easy separation. It has been proved that Fe@APT might have a potential application in antibiotic wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 16
·e202501101
·
IF 2
Guo Bin,Rabigul Tursun,Ma Shuaiwu
Graphical This study providing a solid experimental and theoretical basis for solving water pollution, has great research value. Synthesizing the MnTiO 3 with different molar ratios and calcination temperatures. Studying the structure, photodegradation performance, and photodegradation mechanism of synthetic materials, the conclusion is MnTi 0.9 O 3 -900 °C sample has the best photocatalytic performance. With the continuous development of industry, the problem of water pollution is becoming increasingly serious. Methylene blue (Mb) is an important water pollutant that has a negative impact on ecosystems. Photocatalytic technology has been recognized as an effective and environmentally friendly method for solving water pollution, which has attracted widespread research attention. This study providing a solid experimental and theoretical basis for solving water pollution and has high research value. In this paper, MnTiO 3 with different molar ratios (Mn:Ti = 1:0.9 and 1:1) and different calcination temperatures (800, 900, and 1000 °C) was synthesized by sol–gel method. A systematic study was conducted on the structure, photodegradation performance, and photodegradation mechanism of synthetic materials. Research has shown that when the Mn:Ti ratio is 1:0.9 and the calcination temperature is 1000 °C/2 h, pure MnTiO 3 phase can be obtained. Among them, the MnTi 0.9 O 3 -900 °C/2 h sample composed of MnTiO 3 , TiO 2 , and Mn 2 O 3 phases showed the highest photocatalytic degradation efficiency (54.3%) towards Mb. The mechanism of the excellent photocatalytic activity of MnTi 0.9 O 3 -900 °C/2 h is due to its narrow bandgap, porous structure, abundant oxygen vacancies, and heterojunction structure, which enhances light absorption and improves electron hole separation efficiency.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Algal Research-Biomass Biofuels and Bioproducts
·
2025
·
IF 4.5
Liqin Lin,Linjuan Ning,Shiping Chen,Baobei Wang,Huaqiang Zhuang,Xiaolian Jing,Qingbiao Li
Tetracycline (TC) is the one of the largest used antibiotics and its resulting water environment pollution has received widespread attention. In this paper, biochar was prepared by using the defatted Schizochytrium limacinum (microalgae) residue as raw material and KHCO 3 as activator, and its adsorption properties for TC were investigated. The results showed that KHCO 3 -activation biochar possessed the developed hierarchical porous structure. The specific surface area was up to 2295.26 m 2 ·g −1 , which was 409.6-fold higher than the pristine biochar. When the mass ratio of the pristine biochar to KHCO 3 was 1:1, the as-prepared biochar displayed the best adsorption performance for TC. The pseudo-second-order reaction kinetics can better describe the kinetic experiment results. The maximum adsorption capacity was 1357.5 mg·g −1 , which was more favorable than other biochar derived from agricultural waste reported previously. The adsorption capacity was stable under different solution conditions, suggesting that the microalgae residue-based biochar has a promising application foreground in wastewater treatment.
研究领域:
环境科学
·
生物学
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Meipeng Jian,Yongjian Che,Mingchen Gao,Xiaoran Zhang,Ziyang Zhang,Chaohong Tan,Haiyan Li
Biochar has been proved as a promising and efficient filler in bioretention facilities for enhancing the stormwater pollutants removal. However, the migration behaviors of stormwater pollutants in biochar filled bioretention facilities is unclear. In this study, as one of the most typical stormwater pollutants, naphthalene was selected as an example and a HYDRUS-1D model was first used to understand the migration behavior of naphthalene in a bioretention facility. In comparison with the conventional bioretention soil media (sandy loam), the amended biochar filled bioretention cell showed that the naphthalene removal rate was enhanced by up to 10.1%. Meanwhile, the experimental data was well-fitted by the “two-site sorption model” in HYDRUS-1D model. Another, the effect of rainfall intensity on the naphthalene migration in both bioretention columns was further investigated. The HYDRUS-1D model fitting indicated that the increase in rainfall intensity promoted naphthalene migration by increasing hydraulic conductivity and water flux. In addition, static batch experiments revealed that the biochar filled fillers achieved about 50% higher adsorption capacity than sandy loam. The sensitivity analysis from the HYDRUS-1D model data verified adsorption coefficient K d and longitudinal dispersivity λ are the main factors affecting naphthalene migration. Finally, the model simulation displays that the proportion of naphthalene retained by the fillers was highest during high rainfall intensities, indicating that the fillers remain the most important fate for naphthalene. This study presents research on the behavior and mechanisms of stormwater pollutant transport through improved bioretention facilities.
研究领域:
环境科学
·
水文学
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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）