Journal of Energy Storage
·
2024
·
IF 8.9
Huanzhong Zeng,Qianghong Wu,Rui Liu,Yuanyou Peng,Fuliang Zhu,Fen Ran
Cobalt is a common contaminated metal exists in industrial wastewater and is also widely used in the field of energy storage as electrode materials. Cobalt(II) is the most familiar water-soluble form of cobalt element and its emission to environment causes serious problems. Traditional physical and chemical methods are unable to fully eradicate cobalt(II) in wastewater, especially at low concentrations. Therefore, phytoremediation is proposed and myriophyllum spicatum is chosen as the subject for absorbing cobalt(II) presented in the simulated wastewater. The results show that the myriophyllum spicatum can prominently but finitely absorb cobalt(II) from simulant wastewater; in order to reuse recycled cobalt(II), the composite material is obtained after carbonization and is applied to supercapacitors as electrode material. Under the condition of a current density of 0.5 A/g in 6 M KOH, the specific capacitance is 275 F/g, where good charge storage capacity and rate performance are obvious compared with other non-activated biomass-derived carbon materials.
研究领域:
环境科学
·
能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
GEODERMA
·
2017
·
IF 4.036
Dasheng Sun,Qingfang Bi,Huaping Xu,Kejie Li,Xipeng Liu,Jun Zhu,Qichun Zhang,Chongwei Jin,Lingli Lu,Xianyong Lin
Soil drying-rewetting can remarkably affect phosphorus (P) transformation, and thus, alter P distribution among P pools; however, little is known about the effect of the degree of drying before rewetting on labile P fractions and the bioavailability of organic P (P o ). In this study, soils with distinct physico-chemical properties were allowed to desiccate to 5%, 10%, 20%, 30%, and 40% water holding capacity (WHC), and soils maintained at 50% WHC were used as controls, and the bicarbonate-extractable P and hydrolyzable P o fractions were analyzed after 5 h of rewetting. Bicarbonate-extractable P o accounted for 33.3–56.4% of extractable total P, and hydrolyzable P o constituted 34.4–79.7% of extractable P o . For extractable P o , 7.7–29.9% was labile monoester P, 6.5–14.9% was diester P, and 17.8–36.5% was phytate-like P. Bicarbonate-extractable inorganic P and P o contents were not affected by 20–40% WHC treatments, but increased by 26.3–48.1% and 5.7–52.9%, respectively, when the soils were dried to 5% WHC. Similarly, labile monoester, diester, and phytate-like P contents increased by 12.5–89.8%, 0–65.2%, and 24.6–65.6%, respectively, in 5% WHC soils. Pearson's correlation analyses showed that the relative increases in bicarbonate-extractable inorganic P and phytate-like P, following extreme drought, were positively correlated with soil organic carbon , oxalate-extractable aluminum (Al), and iron (Fe), suggesting regulatory roles of organic matter and Al/Fe oxides in P transformation during soil drying-rewetting. Taken together, our results suggest that extreme drought events before rainfall or irrigation facilitate an increase in the level of labile P, including considerable proportions of hydrolyzable P o fractions, potentially posing a substantial threat to water bodies in the context of climate change .
研究领域:
生态学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yingnan Liu,Qinzhi Wang,Shuwen Guo,Pei Jia,Yuhang Shui,Siyu Yao,Chen Huang,Min Zhang,Li Wang
Hydroquinone (HQ) is a major phenol compound pollutant derived from industrial wastewater. Its content in environmental water is closely related to the water quality. Thus, it is in great need to develop facile, sensitive and selective detection methods for HQ. In this paper, an effective and selective HQ detection probe was fabricated based on novel silicon quantum dots (SiQDs), which were synthesized by a one-step hydrothermal method. Such SiQDs exhibited good water solubility and intensely green fluorescence. Interestingly, their fluorescence can be significantly quenched upon addition of HQ, which is attributed to the electron transfer from SiQDs to the generated 1,4-benzoquinone, and the inner filter effect of SiQDs-1,4-benzoquinone complex. This SiQD probe can detect HQ in a wide concentration range from 6 to 100 μM, with a detection limit of 2.63 μM. More importantly, compared with other reported methods, this probe can eliminate the interference from catechol (CC) and resorcinol (RS), and gives new insight on the discrimination HQ from its isomers. Furthermore, this fluorescent probe was also successfully applied for the determination of HQ in real water samples with satisfactory recoveries, indicating the reliability and potential application of this fluorescent probe for monitoring HQ.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Penggang Pei,Tao Sun,Yingming Xu,Yuebing Sun
Mercury (Hg) contamination in water and soil is of great concern due to its high toxicity and biomagnification in food chain. In this study, clay mineral montmorillonites (Mt) was thiol-functionalized via 2–mercaptoethylammonium intercalation (ISH–Mt) and 3–mercaptopropyltrimethoxysilane surface grafting (GSH–Mt) for enhancing remediation ability of Hg contamination. Characterization results indicated that surface grafting significantly changed surface morphology and porous structure , with rougher surface, larger specific surface area and more porous structure. The adsorption capacity of Hg 2+ was significantly enhanced by thiol functionalization, being 141.55 and 136.92 mg g −1 for ISH–Mt and GSH–Mt, respectively. Fitting results of pseudo-second-order kinetic models ( R 2 = 0.879– 0.930) and Freundlich isotherms ( R 2 = 0.900– 0.950) indicated that Hg 2+ was adsorbed on heterogeneous surfaces with chemical processes as the rate-limiting step. TCLP-Hg concentrations in soils after applying ISH–Mt and GSH–Mt (0.1%–1% dosage, m/m ) were < 200 μg L −1 (The Leaching Standards of Hazardous Wastes , USEPA). Hg fractionation shifted from mobile fractions (exchangeable and carbonate-bound) to stable forms (organic matter-bound). XPS and Hg L III -edge EXAFS studies revealed that the complexation of –SH toward Hg was the primary mechanism for Hg adsorption and stabilization. These results illustrated that thiol-functionalized Mts prepared by intercalation and surface grafting are promising for the remediation of Hg-contaminated water and soil.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuying Zhang,Na Li,Lianmei Chen,Xueru Sheng,Bing Wang,Jian Zhang,Qingwei Ping,Yan Shi
In this paper, bamboo biochar was prepared and used for laccase immobilization. Biochar was prepared under different conditions (pyrolysis temperature, heating rate and dwell time) to understand biochar characteristics impacts on enzyme activity. The results showed that the preparation conditions had an important effect on the content of carboxyl groups on biochar. And the specific surface area is not the key factor affecting laccase immobilization in this study, which is a little different than before. The highest immobilized laccase activity (1404.17 U/g) was obtained when the biochar was heated to 300 °C at the rate of 15 °C/min and stayed for 1.5 h, and the carboxy group concentration was 0.490 mmol/g. Compared with free laccase (FL), the immobilized laccase on bamboo biochar (LBC) showed higher thermo-tolerant performance, more excellent acid-proof ability and reusability. Without any mediators, LBC displayed high degradation efficiency (74.72 %, 85.88 % and 94.53 %, respectively) for bisphenol A (BPA), malachite green (MG) and methyl orange (MO) in water. Our research demonstrates that the content of carboxyl group in biochar plays a decisive role in the immobilization of laccase and LBC has excellent performance in the effective removal of toxicant in water, which makes it a promising candidate for environmental recovery.
研究领域:
环境科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2025
·
IF 2.5
Hui Zhang,Ziqi Wang,Yahui Ji,Junfeng Li,Feifei Chen,Fangxin Du,Gen Liu
The detection of organic pollutants in water was deemed critical for safeguarding aquatic ecosystems, maintaining human health, and upholding water quality standards. In this study, a novel electrochemiluminescence (ECL) sensor was proposed for the sensitive detection of hydroquinone (HQ) in lake water, utilizing a glassy carbon electrode (GCE) modified with silver/luminol-functionalized carbon microspheres (GCE/CM@Ag/Lu). Due to the consumption of H 2 O 2 by HQ, the ECL signal was attenuated, enabling the quantitative detection of HQ. Under optimized conditions, the linear range for HQ ranged from 1.0 × 10 −4 –1.0 × 10 −10 mol L −1 , with a limit of detection (LOD) of 3.3 × 10 −11 mol L −1 (S/N = 3). The proposed ECL sensor shows promising potential to open new avenues for water quality assessment.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-11
·
IF 3.998
Song Jinlong,Han Gang,Wang Yani,Jiang Xu,Zhao Dongxue,Li Miaomiao,Yang Zhen,Ma Qingyun,Parales Rebecca E.,Ruan Zhiyong,Mu Yingchun
Malachite green is a common environmental pollutant that poses a great threat to non-target organisms, including humans. This study reports the characterization of a bacterial strain, Pseudomonas veronii JW3-6, which was isolated from a malachite green enrichment culture. This strain degraded malachite green efficiently in a wide range of temperature and pH levels. Under optimal degradation conditions (32.4 °C, pH 7.1, and inoculum amount of 2.5 × 10 7 cfu/mL), P. veronii JW3-6 could degrade 93.5% of 50 mg/L malachite green within seven days. Five intermediate products from the degradation of malachite green were identified: leucomalachite green, 4-(dimethylamino) benzophenone, 4-dimethylaminophenol, benzaldehyde, and hydroquinone. We propose a possible degradation pathway based on these findings. The present study is the first to report the degradation of malachite green by P. veronii and the identification of hydroquinone as a metabolite in the degradation pathway.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Xiaojuan Zhang,Ting Dong,Linhao Wang,Tianhua Yang,Yanlong Li,Wanli Zhang
With high microporosity, good dispersibility, excellent specific surface area and large content surface functional group, hydrochar demonstrates significant advantages and strong affinity towards pollutants in water. Modification method plays a significant role for anion adsorption by modified hydrochar, layered double hydroxide (LDH) modified hydrocarbons (Mg/Al-LDH@HC-HCl) have been synthesized through a one-step hydrothermal approach and activated with hydrochloric acid in this paper. The physical and chemical characteristics of the hydrochar, both before and after modification, are analyzed using BET, SEM-EDS, TEM, XRD, FTIR, and XPS to explore the phosphate adsorption mechanisms. The adsorption behavior of the composite follows the pseudo-second-order kinetic model and the Langmuir isotherm model, achieving a substantial adsorption capacity of 143.03 mg/g. Multiple mechanisms are leveraged within the absorption process, including pore filling, electrostatic attraction, ligand exchange, metal complexation on inner and outer surfaces, and ion exchange. An approximate 70% phosphate removal efficiency is retained by modified Mg/Al-LDH@HC-HCl after a comprehensive 5-cycle desorption using NaOH as the eluent, demonstrating the remarkable regenerability of synthesized hydrochar composite.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Ting Wang,Tianwei Qian,Dongye Zhao,Xiaona Liu,Qingwei Ding
Radioactive pertechnetate (TcO4 − ) has been detected in nuclear waste affected soil and groundwater, posing significant effect on human health and the environment. Yet, cost-effective remediation of Tc-contaminated soil and groundwater remains challenging. To address this critical technology need, we prepared a class of pyrite (FeS 2 ) particles for effective immobilization of pertechnetate. Using perrhenate (ReO 4 − ) as a non-radioactive surrogate of TcO 4 − , we tested the immobilization effectiveness of the material through batch kinetic experiments, and evaluated the remobilization potential of immobilized Re under anoxic (sealed from air) and oxic (exposed to air) conditions and in the presence of humic acid (HA), EDTA, nitrate, and a Chinese loess soil. The results showed that more acidic pH gave faster Re(VII) removal due to more abundant electron sources (Fe 2+ and S 2 2− ). X-ray diffraction (XRD) and/or X-ray photoelectron spectroscopy (XPS) analyses confirmed formation of ReO 2 /ReS 2 as the major reduction products. The immobilized Re remained highly stable when aged for 360 days under anoxic conditions at different influence factors. Yet, the immobilized Re was vulnerable to oxygen oxidation, and about 78% of Re was remobilized after 40 days of exposure to air regardless of the initial pH (3.5–9.0) due to excessive pyrite oxidation and the associated pH drop (~2). HA at 120 mg/L inhibited Re remobilization under oxic conditions, which lowered the Re remobilization by ~21% after 40 days of oxic aging. The presence of EDTA facilitated dissolution of Fe but inhibited the dissolution of Re under oxic conditions. Nitrate showed negligible effect on Re remobilization. The presence of a Chinese loess soil effectively inhibited Re remobilization under both oxic and anoxic conditions, lowering the leachable Re by ~32% under oxic conditions. The findings may guide engineered application of pyrite particles as a long-lasting reducing material for immobilization pertechnetate or similar redox-active contaminants in soil and water.
研究领域:
环境科学
·
放射性废物处理
✓ 已验证
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 5
·3729-3735
·
IF 3.201
Haitao Wang,Shan Liu,Yisha Xie,Jingran Bi,Yao Li,Yukun Song,Shasha Cheng,Dongmei Li,Mingqian Tan
Chromium is highly toxic and considered as a severe contaminate. Therefore, low cost, highly sensitive sensors for the determination of Cr(VI) are highly required. In the present study, highly luminescent N-doped carbon dots (CG-CDs) obtained from citric acid and glycine with a quantum yield of 78% and label-free fluorescent assay system were designed for Cr(VI) detection based on the inner filter effect (IFE). The CG-CDs were prepared by a one-step hydrothermal method using citric acid and glycine as carbon precursors. The fluorescent sensors showed rapid response, high selectivity, and sensitivity to Cr(VI). A good linear relationship between the concentration of Cr(VI) ions and fluorescence intensity was obtained in the range from 5 to 200 μmol L−1 (R2 = 0.98), and the limit of detection was calculated to be 4.16 μmol L−1 for Cr(VI). Importantly, this method has been successfully applied to the detection of Cr(VI) ions in simulated aquaculture water, which may be helpful to reduce the risk of Cr(VI) intake from contaminated water.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
MARINE POLLUTION BULLETIN
·
2024
·
IF 5.3
Jianxin Fan,Jiaxin Yang,Fulong Cheng,Shikuo Zhang,Jiaoxia Sun
The extensive use of antibiotics has led to significant antibiotic pollution in water bodies, and suspended particulate matter (SPM) is known to be a key carrier of antibiotics in rivers. In this work, the adsorption characteristics of sulfamethoxazole (SMX) on SPM was investigated through batch adsorption and annular flume experiments, and the MIKE 21 model was employed to simulate the migration of SMX and SPM. Results revealed that most SMX adsorption occurred rapidly within 20 min, and 80 % of the equilibrium adsorption capacity was reached. Multilayer adsorption was confirmed by Freundlich model, and adsorption process was found to be spontaneous, endothermic, disordered, and the equilibrium adsorption amounts of SMX on SPM increased with salinity and organic matter increase. SMX desorption from SPM occurred upon the sudden changes of hydrodynamic states, nearly reaching the one-fifth of the SMX equilibrium adsorption amounts within 30 min and the re-adsorption of SMX on SPM would occur with water remained stationary or the re-disturbance time prolonged. The dynamic adsorption process of SMX related with the physicochemical property changes of SPM, which was contributed to the hydrogen bonds, π–π interactions, surface complexation, significantly influenced by the pore filling at the macropore and mesopore scales. The MIKE 21 simulations confirmed hydrodynamic states as the primary factors affecting the migration of SMX and SPM. SMX concentrations in the water would decrease in the presence of SPM, leading to the slower downstream migration of SMX.
研究领域:
环境科学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 29
·18784-18793
·
IF 4.036
Q. I. N. Shili,H. E. Xudong,J. I. N. Fenglong,W. A. N. G. Ying,C. H. U. Hongtao,H. A. N. Shuang,S. U. N. Yangyang,G. A. O. Lidi
Hg2+ is one of the most toxic chemical species in the water environment, and thus developing a new fluorescent covalent organic framework for both the detection and removal of Hg2+ is highly desirable. Herein, a fluorescent composite, termed TpPa-1 COF@CDs, was synthesized by inverse emulsion polymerization method using an imine covalent organic framework as the supporting material and carbon dots as the fluorescent sensor element. The crystallinity, porosity, rich functional receptors (hydroxyl and amino groups), thermal stability and fluorescent properties of TpPa-1 COF@CDs were characterized. The results showed that TpPa-1 COF@CDs exhibited a good detection and removal performance for Hg2+, which was evidenced by its high sensitivity (LOD = 0.75 μg L−1), superior selectivity, large adsorption capacity (235 mg g−1), fast adsorption rate (30 min equilibrium time) and good regeneration (at least five cycles). More importantly, the simple functional monomer, short reaction time and metal-free raw material made TpPa-1 COF@CDs reliable, cost effective and eco-friendly. This research demonstrated the facile construction of a functional covalent organic framework composite for water environmental remediation technologies of metal pollution.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）