WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 21
·1226
·
IF 3.5
Yu Yunhao,Xia Kangle,Zhou Zhongxiao,Zhao Lanlan,Sun Pengfei,Zhou Baocheng,Gong Yixuan,Dong Xiaoping
Excessive phosphate discharge into aquatic environments causes severe eutrophication, posing significant threats to ecological balance and human health. Adsorption is a promising technology for phosphate removal, and fly ash (FA), an industrial solid waste, has attracted attention as a low-cost adsorbent. However, raw FA suffers from low adsorption capacity and pH-dependent performance, limiting its practical application. In this study, a dual-alkali (NaOH and Ca(OH) 2 ) modified FA adsorbent (FA-NC) was developed to address these limitations. The synthesis parameters, including the alkali composition, total alkali dosage, and calcination temperature, were systematically optimized. The optimal FA-NC was prepared by mixing 5.0 g of fly ash with 7.0 g of NaOH and Ca(OH) 2 at a mass ratio of 1:1, followed by calcination at 600 °C for 2 h. An adsorbent dosage of 1.0 g L −1 was selected for the subsequent phosphate adsorption experiments. The physicochemical properties of FA-NC were characterized by XRD, SEM, EDS, XPS, and nitrogen adsorption–desorption techniques, and its phosphate adsorption performance was evaluated through batch and dynamic experiments. The results showed that under the standard batch condition (1.0 g L −1 FA-NC, 20.0 mg P L⁻ 1 , 240 min), phosphate removal exceeded 97% over an initial pH range of 2–12, with a maximum adsorption capacity of 33.0 mg·g −1 . The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, indicating chemisorption and monolayer adsorption. Thermodynamic analysis confirmed that the adsorption was spontaneous and endothermic. FA-NC also exhibited excellent selectivity against coexisting anions, good regenerability (removal efficiency > 82% after four cycles), and effective performance in dynamic adsorption, meeting the Class II water quality standard in China. Mechanistic studies revealed that phosphate removal by FA-NC was achieved through the synergistic effects of electrostatic attraction, surface precipitation, and anion exchange, with calcium sites playing a central role. These results demonstrate that the principal novelty of FA-NC lies in the integration of structural activation and calcium-mediated phosphate immobilization within a simple, rare-earth-free modification route, providing a potentially cost-competitive approach for fly ash valorization and phosphate removal.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Junning Wang,Mengyuan Bao,Tianxiang Wei,Zhaoyin Wang,Zhihui Dai
An iron-nickel bimetallic metal−organic framework (FeNi-MOF) with inner peroxidase-like activity as a support for enzyme immobilization was synthesized for the first time. And the GOx-mediated synthesis of mimic multienzyme system (GOx/FeNi-MOF) was obtained by a one-step biomimetic mineralization . FeNi-MOF played a dual role of a peroxidase mimic and a protective coating. Therefore, the obtained multienzyme system showed both peroxidase-like activity of FeNi-MOF and the biological activity of natural enzyme . FeNi-MOF acted as a peroxidase mimic, showing a higher affinity for hydrogen peroxide (H 2 O 2 ). The enhanced catalytic activity of the FeNi-MOF may result from synergistic effect between iron and nickel. In addition, the GOx/FeNi-MOF was selected as a proof of concept and succeeded in a one-step colorimetric detection of glucose by tandem catalysis. A small amount of the product was used for glucose detection, and the detection range was 0.3–35 mM, which indicated that our sensor can meet the clinical needs for diagnose diabetes.
研究领域:
生物化学
·
材料科学
·
医学诊断
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高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
·
2020
·
IF 3.448
Jia-Qin Wu,Xiao-Mei Xu,Ding-Lin Wang,Neng-Bing Long,Rui-Feng Zhang
Novel nano-composites were prepared by coating epoxy resin-based cationic polymer in nano-thickness via in-situ curing on the nano-wall of macroporous SiO 2 with pore size of 0.5∼1 μm. By changing the thickness of polymer coating the specific surface area and porosity varied in range of 115∼74 m 2 /g and 90.4∼83.9 %, respectively. Through ion exchange phospholipase D (PLD, from Streptomyces sp ) was efficiently immobilized on the nano-composites as support and the immobilized PLD was applied for the highly efficient synthesis of phosphatidylserine (PS). The loading amount of PLD on the nano-composited support reached to a maximum of 90.2 mg/g support , 4 times as high as that on the pure macroporous silica. The specific activity of the immobilized PLD reached as high as 16,230 U/g protein , while that of free PLD was 18,780 U/g protein . Under a wide range of temperature and pH the stability and activity of the immobilized PLD were greatly improved as compared with the free ones. Under optimized conditions at 45 °C and pH 7.0, the PS yield reached as high as 96.2 % within 40 min. After 28 days storage the immobilized PLD retained 82.2 % of original activity, and after 12 cycling reuses it retained 79.3 % of PS yield, which indicated that the immobilized PLD exhibited good stability.
研究领域:
生物化学
·
酶工程
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PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Yan Cai,Weifu Ren,Haiyan Wang,Qi Bian
Diabetic kidney disease (DKD) is a common and serious kidney-related complication of diabetic mellitus. Although albuminuria and estimated glomerular filtration rate (eGFR) are commonly used diagnostic biomarkers, they have limitations in the diagnosis of DKD due to the lack of specificity and sensitivity. Urinary N-glycans are emerging as novel biomarkers for predicting renal prognosis in DKD. However, most of the current N-glycan profiling methods for DKD were based on lectin affinity enrichment or hydrophilic interaction chromatography (HILIC) with optical detection, which provided limited N-glycome coverage in low throughput. Herein, we developed a novel N-glycan purification method, termed Ultrafast Glycoprotein Immobilization for Glycan extraction (UltraGIG), for in-depth profiling of urinary N-glycome in DKD using mass spectrometry (MS). In UltraGIG, proteins were rapidly (within 40 min) immobilized to resin with high efficiency (over 98%) through NHS-reactive chemistry , and then N-glycans were enzymatically released from the resin by PNGase F. Owing to good efficiency of immobilization of proteins to resin, the subsequent washing steps to remove proteins and other impurities could be easily performed. The UltraGIG showed good selectivity towards glycans (extracting N-glycans from the mixture of IgG and BSA at a 1:100 M ratio) and samples loss was minimized (detection sensitivity at fmol level). A total of 237 N-glycan compositions were identified from urine samples with DKD and healthy controls, which representing the largest data set of N-glycome from DKD. Compared to healthy controls, 3 N-glycans were up-regulated and 14 N-glycans were down-regulated in DKD patients. Collectively, UltraGIG offers a competitive sample purification method for in-depth analysis of urinary N-glycome by MS and provide new insights into biomarker study for the diagnosis of DKD.
研究领域:
医学
·
生物化学
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PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2021
·Vol. 39
·期 10
·2889-2897
·
IF 6
Cuiyuan Liang,Xin Wang,Dexin Yu,Wei Guo,Feng Zhang,Fengyu Qu
Main observation and conclusion Detection of hydrazine originated from electrochemical media has recently gained considerable attention in the sensing field. Herein, to improve electron transfer capacity, a polyoxometalate metal-organic framework (POMOF, NENU-3) is in-situ nucleated onto the carboxyl functionalized reduced graphene oxide (CFG) (NENU-3/CFG, abbreviation N3/CFG). The N3/CFG supported onto carbon cloth electrodes (CCEs) has been investigated for hydrazine detection. The amperometric results display that the POMOF/CFG to hydrazine has a broad linear range (0.09—362.5 μmol/L) and low detection limit (24 nmol/L). In addition, the POMOF/CFG-based sensors possess good anti-interference capability, boosted stability and feasibility. Furthermore, when applied to the detection of practical samples, acceptable relative recoveries of 96.26%—107.30% are obtained.
研究领域:
材料科学
·
分析化学
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DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Guangshui Tu,Chong Wang,Shengyou Chen,Qian Wang,Zhenxue Liu,Haotian Zhou,Chunyu Feng,Handou Zheng,Haiyang Gao
Heterogeneous catalysts have long dominated polyolefin production, the immobilization of a pyridylamido hafnium catalyst is highly challenging because of its unique in-situ ligand modification mechanism. Here, we report a heterogeneous pyridylamido hafnium catalyst immobilized on a dual MgCl 2 /Al i Bu n (2-ethyl-1-hexoxide) 3-n activator/support for slurry homo- and copolymerization of 4-methyl-1-pentene (4MP). The supported pyridylamido hafnium catalyst shows enhanced catalytic activity and excellent polymer morphology control toward homopolymerization of 4-methyl-1-pentene. The produced poly(4-methyl-1-pentene)s show high isotacticity (>99%) and high melting temperatures up to 230 °C, and have normal molecular weight distribution. The heterogeneous catalyst still remains the advantages of enhanced catalytic activity and excellent polymer morphology control during the copolymerization of 4MP and α-olefins. Both the incorporation of α-olefin and longer chain α-olefins can improve the resilience of PMP materials.
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高影响因子
Nano Research
·
2023
·Vol. 17
·期 3
·1473-1481
·
IF 9.9
Ouyang Yue,Li Xiaoxiao,Zhu Jiexin,Zong Wei,Dai Yuhang,Gao Xuan,Zhang Wei,Yang Shengyuan,Bagherzadeh Roohollah,Lai Feili,Miao Yue-E.,Liu Tianxi
The shuttle effect induced by soluble lithium polysulfides (LiPSs) is known as one of the crucial issues that limit the practical applications of lithium-sulfur (Li-S) batteries. Herein, a titanium dioxide nanoparticle embedded in nitrogen-doped porous carbon nanofiber (TiO 2 @NCNF) composite is constructed via an interface-induced polymerization strategy to serve as an ideal sulfur host. Under the protection of the nanofiber walls, the uniformly dispersed TiO 2 nanocrystalline can act as capturing centers to constantly immobilize LiPSs towards durable sulfur chemistry. Besides, the mesoporous microstructure in the fibrous framework endows the TiO 2 @NCNF host with strong physical reservation for sulfur and LiPSs, sufficient pathways for electron/ion transfer, and excellent endurance for volume change. As expected, the sulfur-loaded TiO 2 @NCNF composite electrode presents a fabulous rate performance and long cycle lifespan (capacity fading rate of 0.062% per cycle over 500 cycles) at 2.0 C. Furthermore, the assembled Li-S batteries harvest superb areal capacity and cycling stability even under high sulfur loading and lean electrolyte conditions.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
·
高分子化学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2012
·Vol. 16
·期 12
·3783-3790
·
IF 2.131
Dong Jing,Liu Tao,Meng Xiaomeng,Zhu Jianying,Shang Kun,Ai Shiyun,Cui Shenglong
A new method based on specific binding between glycoprotein acetylcholinesterase and boronic acid-functionalized Fe@Au magnetic nanoparticles was presented for the development of acetylcholinesterase biosensor. Alginate–graphene composite-modified electrode was firstly prepared as the substrate. Then, biocompatible boronic acid-functionalized Fe@Au magnetic nanoparticles were anchored by the covalence between the cis -diol of alginate and the boronic acid group on Fe@Au nanoparticles. Acetylcholinesterase was subsequently immobilized via the bonding between the glycosyl of acetylcholinesterase and the boronic acid group. The immobilized enzyme retained relatively high bioactivity and the fabricated biosensor exhibited high sensitivity and fast response to acetylthiocholine chloride. Based on enzyme inhibition, carbamate pesticide was detected using Furadan as a model compound. Two linear ranges of 0.05–15 and 15–400 ppb were obtained with a detection limit of 0.01 ppb. The biosensor also showed acceptable reproducibility and relatively good storage stability. Moreover, satisfactory results were obtained in the real sample analysis.
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高影响因子
CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Linbin Jiang,Yuan Lu,Xingyun Liu,Hu Tu,Jianwei Zhang,Xiaowen Shi,Hongbing Deng,Yumin Du
Quaternized carboxymethyl chitosan (QCM-chitosan) and organic rectorite (OREC) immobilized nanofibrous mats are fabricated via layer-by-layer (LBL) technique in a self-assembly manner. The negatively charged cellulose nanofibrous mats hydrolyzed from electrospun cellulose acetate (CEL) mats are alternately modified with the positively charged QCM-chitosan and OREC intercalated composites and the negatively charged sodium alginate (ALG) via LBL technique. The morphology and antibacterial activity of the resultant mats are studied by changing the number of deposition bilayers, the compositions of dipping solutions and outermost layer. X-ray photoelectron spectroscopy results imply that QCM-chitosan and OREC are coated on cellulose mats. Besides, wide angle X-ray diffraction and small angle X-ray diffraction are applied to investigate the crystalline of the composite mats and the interlayer distance of OREC, respectively. The antibacterial activity of the mats increases with the incorporation of OREC into LBL films.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
表面工程
·
生物医学工程
·
抗菌技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Wei-Ming Yin,Yan Wang,Yuan Sun,Nian-Dan Zhao,Chen Wang,Zhijun Chen,Yuan-Ru Guo,Shujun Li,Qing-Jiang Pan
To solve pollution problem of heavy metal ions (HMIs) and recover them for sustainable development, a high-efficient-sewage treatment agent, carbon dots/cellulose nanofiber/Mg(OH) 2 (CCMg), has been fabricated via a simple hydrothermal method . A variety of characterizations show that cellulose nanofiber (CNF) formed a layered-net structure. Hexagonal Mg(OH) 2 flakes of about 100 nm has been attached on CNF. Carbon dots (CDs) around 10–20 nm in size were produced from CNF and distributed along CNF. The extraordinary structural feature endows CCMg with high removal performance towards HMIs. The up-taken capacities reach 992.8 and 667.3 mg g −1 for Cd 2+ and Cu 2+ , respectively. The composite bears excellent durability in treating wastewater. Notably, the qualification of the drinking water can be satisfied while applying CCMg to handle Cu 2+ wastewater. The mechanism of removal process has been proposed. Practically, Cd 2+ /Cu 2+ ions were immobilized by CNF due to the space confinement effect. It achieves the facile separation and recovery of HMIs from the sewage, and more importantly, eliminates the risk of secondary contamination.
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DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Qian He,Huixia Chen,Haiyan Tang,Jiyuan Sun,Hongbin Xu,You Zhang
The lightweight aggregate ceramsite (LAC) was prepared from by-product sulfate salt slag (BPSS) of high-salt organic wastewater with fly ash. The BPSS fixation rate, leaching toxicity, morphological structures and potential environmental risks of heavy metals in LAC were investigated. BPSS can be fixed in LAC when the mass ratio of Fly ash: Kaolin: clay was 7:1:2, the addition of BPSS was 28%, the heating rate was 8°C min−1, and the calcination temperature was 1100°C. The characteristics of the LAC met the requirements for Chinese lightweight aggregate standards (GB/T17431.2-2010). The Total Organic Carbon (TOC) content of the aqueous leaching liquor in LAC was less than 0.5 mg·L−1. And the fixation rate of heavy metal was more than 99%, which meets the requirements of GB 5085.3-2007. The BPSS immobilization mechanisms were mainly related to the formation of new crystal phases, including Leucite (KAlSi2O6), Albite (Na2O·Al2O3·6SiO2), Potash Feldspar (K2O·Al2O3·6SiO2), Jadeite (NaAlSi2O6), Hauyne ([Na,Ca]8[Si,Al]12O24[SO4]2), Nosean (Na8Al6Si6O24SO4), and Sodalite (Na8Al6Si6O24[MnO4]2) by incorporation of heavy metals in high-temperature curing reaction. This work provides an effective method for the harmless treatment and recycling of by-product salt residues from high-salt organic wastewater.
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DOI
PubMed
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 7
·4353-4371
·
IF 5.7
Wang Peiwen,Chen Congjin,Shen Hangyu,Wei Jinrou,Lan Yi,Liao Xiufen,Fan Hui,Hu Huayu,Zhang Yanjuan,Huang Zuqiang
Ciprofloxacin (CIP) contamination can induce the growth of antibiotic-resistant bacteria, which poses a great threat to the environment. Herein, a composite adsorbent material, sodium lignosulfonate/chitosan@ZIF-8 (SLS/CS@ZIF-8), was synthesized by introducing sodium lignosulfonate into chitosan foams (CS-FM) and then loading ZIF-8 onto the resulting foams (SLS/CS-FM) by in situ immobilization to effectively remove CIP from water. The adsorption behaviour and mechanism were studied through batch experiments and characterization analysis. The results showed that the maximum adsorption capacity of SLS/CS@ZIF-8 was 413 mg/g with a CIP concentration of 250 mg/L at 303 K, which was more than most previously reported adsorbents. The CIP adsorption of SLS/CS@ZIF-8 was better described by the pseudosecond-order kinetic model and Langmuir isothermal model. The adsorption was a spontaneous and endothermic physical adsorption process with increased entropy. The adsorption involved electrostatic interactions, hydrogen bonding interactions and π-π interactions. This work provides a potential adsorbent for the effective removal of CIP from wastewater and a new, low-carbon, green chemical technology for the high-value utilization of lignin.
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高影响因子
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