JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Jie Chen,Jinfeng Ling,Bo Sun,Jian Wang,Baoxue Zhou,Xiaohong Guan,Yuankui Sun
Bisulfite-activated permanganate (PM/BS) process has proven to be a promising method for trace organic contaminants (TrOCs) abatement. However, to our knowledge, most previous studies on PM/BS process were limited in synthetic water at lab-scale. Hence, the performance of TrOCs abatement by PM/BS process was investigated in real waters in this study, and for the first time, its feasibility as a pretreatment process was evaluated at pilot-scale. The lab-scale results indicated that almost all tested TrOCs could be completely removed from pure water, while their removal efficiencies varied widely from ∼20 % to ∼90 % in real waters. Correlation analysis suggested that TrOCs abatement decreased linearly with increasing concentration of dissolved organic matter (DOM) and halide ions in real waters. The TrOCs with electron-donating groups were more likely to be decomposed in PM/BS process. The PM/BS pretreatment produced MnO 2 and decreased the aromatic signal of the DOM, which enhanced the removal of DOM during subsequent coagulation-sedimentation processes. Comparing with ozonation, chlorination, and permanganate processes, PM/BS process showed some advantages in terms of TrOCs abatement and operating costs. Furthermore, the pilot-scale experiment confirmed that PM/BS process combined with traditional water treatment processes could achieve excellent TrOCs abatement (greater than 84%).
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高影响因子
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
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2020
·
IF 4.074
Yuxuan Liu,Yonghua Wang,Qianqian Wang,Beibei Wang,Xiaodan Liu,Bing Wu
Bisphenol A (BPA) as an endocrine-disrupting chemical has been widely detected in the aquatic environment, including Taihu Lake, China. Adsorption and bacterial removal in sediments play important roles in the fate of BPA in the aquatic environment, which might be influenced by the properties of the sediment. In this study, two types of sediments from Gonghu Bay and Meiliang Bay in the northern Taihu Lake were collected to investigate the fate of BPA in the sediments. Both sediments showed different adsorption properties to BPA. Due to the higher proportion of sand and total organic carbon (TOC) content in the Meiliang Bay sediment, its adsorption capacity was stronger than that in the Gonghu Bay sediment. Bacteria in both sediments could completely degrade BPA within 3–5 days. Based on the correlation analysis, Firmicutes and Cyanobacteria might be involved in BPA removal at the phyla level. At the genus level, Novosphingobium , Massilia, and Methylophilus were found to be related to the BPA removal in the Gonghu Bay sediment, and Acinetobacter , Bacillus and Pseudomonas were found in the Meiliang Bay sediment. The different bacterial communities might be important reasons for the different removal capacity of BPA in both sediments. The above results provide basic information for the assessment and management of BPA in the Taihu Lake, and improve the understanding of BPA removal in sediments.
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高影响因子
ANALYTICAL SCIENCES
·
2020
·Vol. 36
·期 10
·1157-1161
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IF 2.049
Yu Wenjie,Li Hengye,Zhang Lin,Liu Jing,Kong Fenying,Wang Wei
In this study, efforts were made to prepare a porous aromatic framework (PAF) with build-in magnetic nanoparticles (Fe3O4-PAF) for use as an efficient adsorbent for the removal of organic pollutants from water. The Fe3O4-PAF showed good handleability and could be recovered easily by magnetic separation. As a proof of concept, the adsorption properties of Fe3O4-PAF were investigated to remove 2,4-dichlorophenol (2,4-DCP) and bisphenol A (BPA) from water. The Fe3O4- PAF showed a fast adsorption rate, high adsorption efficiency and high adsorption capacities. It adsorbed 2,4-DCP (0.1 mmol L −1 ) and BPA (0.1 mmol L −1 ) with pseudo-second-order rate constant (k2) of 2.1 and 3.54 g mg −1 min −1 , respectively. According to the Langmuir isotherm model, the maximum adsorption capacities of 2,4-DCP and BPA onto Fe3O4-PAF were calculated to be 234.74 and 233.65 mg g −1 , respectively. The Fe3O4-PAF also featured good tolerance to harsh conditions, facilitating its application in a real water environment. It could be regenerated easily and reused multiple times without obvious loss of efficiency. In summary, this study provides a general and effective way to improve the handleability of PAFs and expands the practical application of PAF-based materials.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 14
·5324-5332
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IF 3.288
Jinfei Liu,Huijiao Qiu,Fei Zhang,Yan Li
In this study, a new magnetic composite material zeolitic imidazolate framework-8 coated Fe3O4@SiO2 (Fe3O4@SiO2/ZIF-8) was prepared by in situ growth of ZIF-8 on the surface of Fe3O4@SiO2 microspheres at room temperature. In addition, it had a large surface area, high superparamagnetism and great adsorption capacity. As is well known, MOFs have extraordinary adsorption capacity. As one of the classic MOFs, ZIF-8 has open metal sites, hydrophobic properties, and especially excellent water stability. Fe3O4 is generally used for the synthesis of different magnetic materials, which can make the preconcentrated material easy to separate from the extraction medium. All these features make the composite material Fe3O4@SiO2/ZIF-8 suitable to be developed as an adsorbent for preconcentration of bisphenols (BPs) including bisphenol F, bisphenol A, bisphenol B and bisphenol AP. Most of all, applying Fe3O4@SiO2/ZIF-8 to magnetic solid-phase extraction (MSPE) coupled with high performance liquid chromatography (HPLC) for detection of BPs can greatly improve the sensitivity of the method, and the process is simple and convenient. Under the optimal conditions, four BPs were detected with large linear ranges (0.05–200 μg L−1), low limits of detection (LODs) (10–15 ng L−1), relative standard deviations (RSDs) ranging from 2.0 to 4.5% and enrichment factors (EFs) ranging from 110 to 186. Additionally, the proposed method was applied to detect BPs in water and plastic packagings of food and drinks generally used in daily life.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Chengyu Zhang,Shengping You,Yudong Liu,Chengyu Wang,Qisheng Yan,Wei Qi,Rongxin Su,Zhimin He
The raw material of resin, Bisphenol A (BPA), is an endocrine-disrupting compound that can be continuously released into the environment and directly harms health. In this study, luffa sponge was used as the raw material to prepare magnetic carbon chemicals for laccase immobilization and BPA degradation. The MLC-1 was synthesized by one-step carbonization-magnetization method, which showed good magnetic properties and a strong load capacity for laccase. Compared with free laccase, Laccase@MLC-1 showed stronger thermal stability, better acid-tolerate performance and reusability. Moreover, Laccase@MLC-1 showed higher BPA degradation efficiency than free laccase. 100 mg/L of BPA can be completely removed by Laccase@MLC-1 in 4 h, while only 62.70% of BPA was removed by the same amount of free laccase. By improving reuse strategies, a complete BPA degradation ratio was obtained in each reoperation process. All results proved that Laccase@MLC-1 might be a suitable biocatalyst candidate for BPA removal.
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高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Min Jia,Junyi Sha,Zhihua Li,Wenjing Wang,Hongyan Zhang
The widespread exposure of bisphenol A (BPA) presents a significant risk to human health. A rapid, ultra-sensitive and label-free colorimetric aptasensor using high affinity truncated aptamers was developed for BPA detection. Truncated 38-mer and 12-mer aptamers specific for BPA were obtained through rationally truncation from 63-mer BPA aptamer. The dissociation constants ( K d ) of 38-mer and 12-mer aptamers were determined to be 13.17 nM and 27.05 nM. Then, truncated aptamers were used in label-free colorimetric detection assays based on gold nanoparticles (AuNPs). The limit of detections of aptasensors using 38-mer and 12-mer aptamers were 7.60 pM and 14.41 pM, which were 265-fold and 140-fold lower than that of the aptasensor using 63-mer aptamer, respectively. The recovery rates in milk, orange juice and mineralized water samples were 93.88% to 107.30%. Therefore, the developed BPA colorimetric aptasensor using truncated aptamers has great application prospects in food safety control and environmental monitoring.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Yin Wang,Ruotong Wang,Lan Yu,Yun Wang,Chuanhui Zhang,Xiaodong Zhang
A series of new layered composite catalysts LaCu 0.5 Co 0.5 O 3 -MMT 0.2 /CN x (x = 0.025, 0.075, 0.125) were prepared by montmorillonite (MMT) and g-C 3 N 4 (CN) in situ intercalation of B-site double perovskite. The experimental results showed that the appropriate MMT and CN loading of LaCu 0.5 Co 0.5 O 3 -MMT 0.2 /CN 0.075 were beneficial to the increase of catalytic performance because perovskites were evenly distributed between the layers of MMT and CN and effectively avoided the loss of active components. The sample had a smaller particle size distribution, a larger specific surface, a higher ratio of O ads /O latt and excellent microwave absorption capabilities. The removal rate reached 98.7% in 6 min under optimal conditions with catalyst dosage of 9.5 g/L, H 2 O 2 dosage of 350 μL, pH of 4, MW power of 500 W, and bisphenol A (BPA) concentration of 50 mg/L. LCCOM 0.2 /CN 0.075 also showed good reusability with a degradation efficiency of 95.7% even after the 5th cycle. And the microwave-catalyzed degradation followed pseudo first-order kinetics. Combining relevant characterization and experimental results of free radical capture, possible reaction mechanisms were discussed. The surface active sites of the catalyst can be excited by microwaves to produce oxidized free radicals, thereby degrading bisphenol A through electron-hole transport.
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高影响因子
Journal of Environmental Chemical Engineering
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2020
·
IF 4.3
Aijiao Zhou,Xumeng Wu,Wangwei Chen,Lei Liao,Pengchao Xie
Powdered activated carbon embedded chitosan-polyvinyl alcohol composite (PAC/CS/PVA) beads were designed via a simple method for the adsorptive removal of hydrophilic sulfamethoxazole (SMX) and hydrophobic bisphenol A (BPA) from water. The as-prepared hydrogel was characterized, and the adsorption performances were comprehensively investigated. The maximum adsorption capacities of SMX and BPA on the adsorbent are 9.1 mg g −1 and 64.6 mg g −1 , respectively. The optimal pH was around 4 for SMX and 2–9 for BPA, respectively. Higher adsorbent dosages benefited the removal efficiencies but lowered the adsorption capacities. Both temperature and ionic strength slightly affect the adsorption of SMX and BPA. Pseudo-second-order model can well describe the adsorption of SMX and BPA on the hydrogel through spontaneous and endothermic process. Langmuir isotherm model performed better than Freundlich model to fit the equilibrium data. The stable adsorption capacities of SMX and BPA after used the hydrogel for 5 cycles evidenced its excellent reusability. The high adsorption capacities (> 7 mg g −1 for SMX, > 50 mg g −1 for BPA) in the presence of typical water matrices including Cl − , SO 4 2− , Cu 2+ and humic acid further suggest the good application potential of the fabricated PAC/CS/PVA beads.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Chun-Shuai Cao,Jingzhen Wang,Xiaoyong Yu,Yinqing Zhang,Lingyan Zhu
Bisphenol analogues have been widely used and displayed adverse effects on human beings. Although many photocatalysts displayed remarkable performance in degrading bisphenol A (BPA) or bisphenol F (BPF), it is not clear if they may also efficiently decompose other bisphenol analogues. In this study, Bi 5 O 7 I with satisfactory photocatalytic activity was doped with metal-organic framework (UiO-67) to build up Bi 5 O 7 I/UiO-67 heterojunctions. The heterojunction enhanced the charge mobility and separation of the electron-hole pairs, which was conducive for improving the photocatalytic activity. Consequently, 4:1-Bi 5 O 7 I/UiO-67 realized highly effective degradation of seven bisphenol analogues in one hour. Density functional theory (DFT) calculations uncovered that the reaction rate constant k displayed a positive correlation with the Hirshfeld charge q (N) of tertiary butyl carbon attached with different substituent groups. This provides a prospective heterojunction catalyst to degrade a group of pollutants with similar structures, and sheds light on the structural relationship of degradation efficiency.
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高影响因子
ELECTROANALYSIS
·
2020
·Vol. 32
·期 9
·2010-2017
·
IF 2.544
Shengbiao Zheng,Jiaqi Hu,Xue Cui,Tao Hu,Yuyang Zhang,Jiahao Guo,Jing Tang,Xuchun Wang
In the present study, we report a facile method for preparing a porous MWCNTs/ZIF-67 nanocomposite with the help of a morphology-maintained ZIF-67 in situ growth on multi-walled carbon nanotubes. Interesting, the MWCNTs/ZIF-67 nanocomposite demonstrated excellent electrochemical activity for hydroquinone (HQ) and catechol (CC) attribute to the effective interconnections ZIF-67 crystals and MWCNTs. The analytical curves for HQ and CC obtained by differential pulse voltammetry (DPV) were linear in the range from 0.5 to 100 μM. Benefitting from the excellent conductivity of MWCNTs as well as the high surface area and porosity of ZIF-67, the advanced nanocomposite displayed good reproducibility, high selectivity and excellent stability, and was successfully employed to assay the content of dihydroxybenzene isomers in the lake water samples.
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高影响因子
WATER RESEARCH
·
2020
·
IF 9.13
Shiqing Zhou,Ling Li,Yangtao Wu,Shumin Zhu,Ningyuan Zhu,Lingjun Bu,Dionysios D. Dionysiou
The presence of nitrite (NO 2 − ) is inevitable with concentrations of several mg L −1 in some typical water bodies. In this study, UV at wavelength of 365 nm was investigated to degrade contaminants of emerging concern (CECs) in the presence of NO 2 − at environmentally relevant concentrations (0.1–5.0 mg L −1 ). Six selected CECs with different structures were efficiently removed because of the generation of reactive nitrogen species (RNS) and hydroxyl radical (HO • ) from photolysis of NO 2 − . Contributions of UV 365 photolysis, RNS, and HO • to CEC degradation in UV 365 /NO 2 − system were calculated, and RNS were found to be the predominant species that are responsible for CEC degradation. The second major contributor is HO • for the degradation of selected CECs except for the case of sulfadiazine. Impacts of water matrix components (including dissolved oxygen, solution pH, and natural organic matter) on CEC degradation in UV 365 /NO 2 − system were evaluated. Furthermore, evolution profiles of CECs and NO 2 − in UV 365 /NO 2 − system were tracked when actual water samples were used as background, and a simultaneous removal of CECs and NO 2 − was observed. Transformation products of bisphenol A and carbamazepine were proposed according to the results of HPLC/MS and quantum chemistry calculations. Nitration induced by RNS and hydroxylation induced by HO • are main reactions occurred during CEC degradation in UV 365 /NO 2 − system. Overall, UV 365 is a potential technology to remove CECs and NO 2 − in aquatic environment when residual NO 2 − is present. Our present study also provides possibility for the application of sunlight to remediate water co-polluted by CECs and NO 2 − .
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yue Yin,Mengqi Shi,Yi Ren,Shu Wang,Ming Hua,Junhe Lu,Weiming Zhang,Lu Lv
A novel multifunctional metal-organic frameworks (MOFs) UiO-66@Fe 3 O 4 @UiO-66 (UiO = University of Oslo) was fabricated to adsorb pharmaceuticals and personal care products (PPCPs) under near neutral conditions. We designed a wrinkle structure on the surface of UiO-66@Fe 3 O 4 @UiO-66 by seeded growth strategy. These wrinkles were composed of Fe 3 O 4 nanoparticles and outermost UiO-66. It made the specific surface area of the MOFs increases, and provided multiple active sites for a representative pollutant salicylic acid (SA) adsorption. Moreover, lattice defects formed during secondary growth facilitating the coordination interaction between SA and the secondary building unit of UiO-66@Fe 3 O 4 @UiO-66 under near neutral conditions. These advantages made the adsorption capacity of per unit mass UiO-66 in UiO-66@Fe 3 O 4 @UiO-66 about 42% higher than that of the pristine UiO-66, and the removal rate of 1 mg L −1 SA reach 64.5% in real wastewater. Furthermore, magnetic Fe 3 O 4 particles in the wrinkles exhibited outstanding magnetic separation performance. So that UiO-66@Fe 3 O 4 @UiO-66 can be effectively separated from the liquid media and regenerated after adsorption. The results show that the wrinkled MOFs could be used as an excellent candidate for SA adsorption in real wastewater. More importantly, this strategy could guide the preparation of different kind of MOFs to adsorb PPCPs in wastewater.
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