ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2016
·Vol. 408
·期 13
·3527-3536
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IF 3.125
Sun Yanan,Lv Zhengxian,Sun Zhiwei,Wu Chuanxiang,Ji Zhongyin,You Jinmao
A simple, sensitive, and selective high-performance liquid chromatography (HPLC) method using 9-(2-iodoethyl)acridone (IEA) as a novel fluorescence derivatizing agent for the simultaneous determination of six thiophenols has been developed. An efficient Pb 2+ -modified OASIS-MCX cartridge was used and could get good recoveries. IEA was successfully used to label thiophenols with high sensitivity and excellent selectivity. The effects of different solvents, pH, and surfactants on fluorescence properties of derivatives were investigated. To obtain the best labeling efficiency, derivatizing parameters including pH value, temperature, and concentration of IEA, as well as types of catalysts were also evaluated in detail. Under the optimal conditions, the separation could be achieved within 12 min with limits of detection (LODs) in the range of 0.6–5.8 μg L −1 and relative standard deviations (RSDs) < 3.9 %. This is the first time that IEA was applied to the analysis of thiophenols, and the established method has been successfully applied to the trace level detection of thiophenols in industrial wastewater samples.
研究领域:
分析化学
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环境科学
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PubMed
高影响因子
Journal of Advanced Research
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2018
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IF 4.327
Nan You,Ji-Yu Li,Hong-Tao Fan,Hua Shen
Nitrophenols (such as o-nitrophenol (ONP), p-nitrophenol (PNP), and 2,4-dinitrophenol (DNP)) are priority environmental pollutants. Their toxicity is pH dependent, and these molecular species of nitrophenols exhibit higher toxicity than their anionic counterparts. Herein, for the first time, a method for the in situ measurement of nitrophenols in acidic industrial wastewater was developed using diffusive gradients in thin films (DGT) with lignocellulose hazelnut shell-derived activated carbons (HSACs) as the binding agents. Nylon membranes (0.1 μm rated) with diffusion coefficients of (2.02 ± 0.13) × 10 −6 cm 2 s −1 for ONP, (1.39 ± 0.09) × 10 −6 cm 2 s −1 for PNP and (1.20 ± 0.08) × 10 −6 cm 2 s −1 for DNP at 25 °C were used as the DGT diffusion layers. The accumulation of ONP, PNP, and DNP in DGT samplers based on the HSAC and nylon membranes (HSAC-DGT) agreed well with the theoretical curves predicted by the DGT equation in synthetic solutions with 200 μg L −1 nitrophenol. The uptake of the HSAC-DGT samplers for ONP, PNP, and DNP was found to be independent of the ionic strength of pNaNO 3 (−log [NaNO 3 ] (mol L −1 )) in the range of 0.7–3 and the pH range of 3–7 for ONP and PNP and 3–6 for DNP, which is beneficial for their accumulation. The matrices of the tested water samples exhibited no notable interference during nitrophenol analysis by the HSAC-DGT samplers. The results of field deployments in acidic industrial wastewater containing 268.3 ± 79.2 μg L −1 DNP were satisfactorily accurate, thus demonstrating that the HSAC-DGT samplers are good candidates for use in the in situ measurement of nitrophenols in acidic aqueous solutions.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
·
IF 6.1
Nian Liu,Yuqi Zhang,Jiaoyan Huang,Sicong Liu,Taiping Qing,Peng Zhang,Bo Feng
In the realm of sensing, carbon dots (CDs) have exhibited remarkable fluorescence characteristics. In the field of catalysis, CDs can function concurrently as electron donors and acceptors and have substantial electron or hole transport capacities. In this study, both merits were integrated into one, and a one-step hydrothermal approach was used to create multifunctional CDs. On the one hand, CDs are employed as a fluorescence probe with good sensitivity and selectivity to detect Cr(VI). On the other hand, CDs exhibit strong photoreduction capabilities for Cr(VI) in the absence of any external cocatalysts or photosensitizers when acting as photoinitiators. The results show that Cr(VI) quenches the CDs fluorescence as a result of the combined effects of static quenching and the inner filter effect. At the same time, under the condition of illumination, the inner filter effect encourages the CDs electrons to move from the valence band to the conduction band, resulting in electron hole pairs. With the help of electrons' reducing power, Cr(VI) can be rapidly and effectively converted to Cr(III). The findings of this study suggest that CDs are a satisfying bi-functional carbon-based material with significant potential for the treatment of industrial wastewater.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chunyan Zhang,Xiaohong Chen,Yanmi Liu,Yi Zhao,Han Zhang,Daomei Chen,Shirong Zong,Jiaqiang Wang
Most photocatalysts reported to date need sacrificial agents (ethanol or methanol) to quench h + and facilitate the reduction of O 2 to H 2 O 2 . This requirement increases the cost of H 2 O 2 production and hinders the advancement of photocatalytic technology. Exploring a novel photocatalyst without the sacrificial agents for photocatalytic production of H 2 O 2 remains a huge challenge. In this research, we designed Indium phosphide (InP) quantum dot (QDs)-decorated bismuth tungstate (Bi 2 WO 6 ) microspheres for the photocatalytic generation of H 2 O 2 without the use of any sacrificial agents. The photocatalytic efficiency of InP/Bi 2 WO 6 composites for H 2 O 2 production reached 17.45 mmol g −1 h −1 , which is 90.8 times and 53.6 times greater than pure InP and Bi 2 WO 6 , respectively. Furthermore, InP/Bi 2 WO 6 composites demonstrated high photocatalytic H 2 O 2 production efficiency when used in industrial wastewater and tap water. In addition, in-situ photocatalytic H 2 O 2 synthesis was applied to actual coking wastewater for lowering chemical oxygen demand (COD) levels, and the removal rate was more than 60%. Remarkably, the degradation efficiency of acid orange 7 using the 3InP/Bi 2 WO 6 sample reached 99.9%. To the best of our knowledge, no other research has reported the use of InP QDs for the photocatalytic in-situ synthesis of H 2 O 2 in real water. This study provides valuable insights for the development of InP-based photocatalysts.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 17
·10094
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IF 6.208
Xiaoxin Chen,Gengxin Yu,Yuanhui Chen,Shanshan Tang,Yingjie Su
Cow dung (CD) is a waste product of livestock production. Improper disposal of a large amount of CD will cause environmental pollution. In this work, three biochar materials based on CD (BMCD) were prepared by using three types of base, including KOH, NaOH, and mixed base (MB, a mixture of equal mass NaOH and KOH) as activators to investigate the different physicochemical properties of BMCDs (BMCD-K, BMCD-Na, and BMCD-MB). The objective was to verify the effectiveness of MB activation in the preparation of biochar materials. The results show that MB has an effect on the structural characteristics of BMCDs. In particular, the surface area and total pore volume, the specific surface area, and the total pore volume of BMCD-MB (4081.1 m2g−1and 3.0118 cm3g−1) are significantly larger than those of BMCD-K (1784.6 m2g−1and 1.1142 cm3g−1) and BMCD-Na (1446.1 m2g−1and 1.0788 cm3g−1). While synthetic dye rhodamine B (RhB) and antibiotic tetracycline hydrochloride (TH) were selected as organic pollutant models to explore the adsorption performances, the maximum adsorption capacities of BMCD-K, BMCD-NA and BMCD-MB were 951, 770, and 1241 mg g−1for RhB, 975, 1051, and 1105 mg g−1for TH, respectively, which were higher than those of most adsorbents. This study demonstrated that MB can be used as an effective activator for the preparation of biochar materials with enhanced performance.Keywords:industrial wastewater;organic pollutants;cow dung;biochar materials;adsorption
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Xiaoqian Liu,Jiaying Ma,Enchao Li,Jiandong Zhu,Huaqiang Chu,Xuefei Zhou,Yalei Zhang
Zero liquid discharge (ZLD) strategy provides significant potential for industrial brine treatment. Still, the application has been constrained by the inadequate water recovery and membrane fouling of its membrane-based brine concentration system. Herein, a pilot-scale system was established that integrated pretreatment, reverse osmosis (RO), nanofiltration (NF), and disk tube reverse osmosis (DTRO), and demonstrated over a 6-month operation for the first application in treating steel industry brine. Meanwhile, novel insights were offered into the spatial evolution of DTRO membrane fouling. The overall ZLD system reached ultra-efficient water recovery at 91% with relatively low energy consumption (7.27 kWh/m 3 ). The RO and NF units concentrated the brine and selectively separated ions of different valences, simultaneously eliminating various contaminants. The DTRO unit enriched the highly saline NF permeate with a remarkable 7.5-fold concentration effect, producing an extremely hypersaline brine salinity (138,472 ± 34,804 mg/L, Cl − /SO 4 2− mass ratio of 56) that ultimately yielded ultra-pure NaCl salt. Additionally, DTRO special fouling patterns revealed a distinctive "W"-shaped fluctuation in humic acid along the device water flow, with concurrent reduction in iron/aluminum oxides leading to their deposition at the outlet. This synergistic fouling, coupled with silicon, coincides with the transformation of silica colloids into silicate compounds. The multistage membrane-based strategy and the spatial membrane fouling evolution pattern proposed and investigated in this work provide a highly efficient and cost-effective solution for industrial brine treatment with ZLD.
研究领域:
环境工程
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水资源管理
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化学工程
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高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
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2021
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IF 2.826
Huimin Li,Shaofan Guo,Lu Wang
This paper reports a new voltammetric method for detection of bisphenol AP (BPAP) with high sensitivity, which is based on a new electrochemical sensor from a three-component composite-modified glassy carbon electrode. The composite was characterised by various surface, structural and electrochemical analysis techniques, such as transmission electron microscopy (TEM), scanning electron microscopy (SEM), Infrared Spectrum (IR), X-ray diffraction (XRD), Energy Dispersive X-Ray Spectroscopy (EDX) and Cyclic voltammograms (CV). The sensor had a well voltammetric response to BPAP, and the linear response ranges from 0.005 μM ~7 μM with the detection limits of 2 nM (S/N = 3). Finally, this system was utilised for determining BPAP in industrial wastewater using the standard addition method.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
ACS ES&T Engineering
·
2025
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IF 6.7
Lei Lu,Xu Cao,Xian-Wei Liu,Han-Qing Yu
Fenton-based advanced oxidation processes (AOPs) are widely applied for the degradation of recalcitrant organic pollutants in chemical industrial wastewaters. However, traditional systems often generate excessive iron sludge and face challenges in sustaining Fe2+ production, which reduces hydroxyl radical (·OH) utilization efficiency and increases treatment costs. Here, we present a FeS-modified micron-sized zerovalent iron (FeS-mZVI) catalyst that enhances continuous Fe2+ release and prevents FeOOH passivation. The FeS-mZVI/H2O2 system achieved nearly 90% COD removal of phenol within 2 h and maintained high efficiency in pilot-scale testing, achieving over 50% COD reduction in real industrial wastewater with a 47% reduction in operational costs compared to traditional Fenton processes. Mechanistic studies confirmed that ·OH, generated through a Fe2+-dominated homogeneous Fenton reaction, are the primary reactive species. These findings indicate that the FeS-mZVI/H2O2 system is a promising and practical approach for large-scale chemical industrial wastewater treatment, offering both economic and environmental advantages.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Tianlei Yang,Shen Zhao,Jie Wang,Mingqi Guo,Yueping Guan,Tao Li
The recovery of low-concentration Au(III) from industrial wastewater holds significant economic and environmental value. Therefore, developing materials for the efficient extraction of low-concentration Au (III) is of great importance. In this study, we propose a novel microextraction scheme that combines the characteristics of microextraction with an extractant curing technique. Magnetic polystyrene microspheres serve as containers to encapsulate the extraction phase, which consists of the extractant (Aliquat 336) and the diluent (1,2-dichloroethane). Magnetic polystyrene microspheres with a diameter of 3.69 μm were swollen using an emulsion containing Aliquat 336 and 1,2-dichloroethane, resulting in the formation of magnetic oil-based gel microspheres with a diameter of 10.14 μm. These magnetic oil-based gel microspheres, which also contain Aliquat 336, are composed of 1,2-dichloroethane (81.73 wt%), Aliquat 336 (11.52 wt%), polystyrene (4.36 wt%), and iron tetroxide (1.69 wt%). At a low oil-to-water (O:A) ratio (ranging from 1:40 to 1:100), the microspheres achieved extraction equilibrium within 8 min. An eluent solution containing 0.1 mol·L −1 hydrochloric acid and 0.05 mol·L −1 thiourea was able to completely reverse the extraction of AuCl 3 from the microspheres, facilitating their regeneration. The microspheres demonstrated stable and effective extraction capabilities over four cycles. In the presence of impurity ions (Ca 2+ , Fe 3+ , Cu 2+ , and Ni 2+ ), the extraction rate of gold by the microspheres exceeded 95 %, while the extraction rate of the impurity ions remained below 10 %. This indicates the excellent selective extraction ability of the microspheres for Au(III).
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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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Jing Yang,Yun Yuan,Ruxin Zhang,Chao Liu,Deyi Zhu,Dandan Ji
Industrial wastewater, a byproduct of rapid industrialization, often contains hazardous heavy metal ions such as Cu 2+ , Cr 3+ , posing significant risks to environmental and human health. To address the urgent need for fast and simple detection methods in industrial enterprises, we developed gelatin-poly-ε-caprolactone (GEL-PCL) nanofiber fluorescent sensors, incorporating 1,4-dihydroxyanthraquinone (1,4-DHAQ), for the rapid detection of Cu 2+ , Cr 3+ ions. Electrospinning was used to prepare 1,4-DHAQ@GEL-PCL and 1,4-DHAQ/Cu 2+ @GEL-PCL sensors, leveraging the fluorescence intensity fluctuation behavior between 1,4-DHAQ and the target ions to enable fluorescence-based detection. The sensors were characterized using SEM to confirm nanofiber morphology, and UV–Vis spectroscopy to analyze absorption properties. The sensors demonstrated high sensitivity and selectivity for Cu 2+ , Cr 3+ ions, with detection ranges of 4.8–6.5 × 10 −6 M and 2.7–4.3 × 10 −6 M, respectively. Furthermore, they maintained stable performance over 6 months of storage and showed reliable results in actual tannery wastewater samples, comparable to ICP-MS data. This study highlights the potential of these sensors as environmentally friendly, cost-effective tools for monitoring heavy metal ion concentrations, offering significant contributions to sustainable industrial wastewater management, and meeting the pressing needs of enterprises for efficient and straightforward monitoring solutions.
研究领域:
环境科学
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材料科学
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分析化学
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2019
·
IF 1.918
Yao Kun,Jia Manke,Wu Huanhuan,Li Yonggang,Chen Chuncheng,Huang Yingping
Cl− in industrial wastewater from glyphosate production has been used as Cl source to synthesize BiOCl photocatalyst via a simple solvothermal route. The crystalline, morphology, specific surface area and optical properties of photocatalysts prepared under various conditions have been investigated. BiOCl photocatalyst prepared in acidic solution shows the highest crystallinity and without impurities and microcellular structure. The degradation of industrial wastewater contaminants demonstrates the possibility of this BiOCl used in industrial wastewater treatment and phosphorus recycling through the subsequent phosphorus recovery processes. This study not only sheds light on the possibility of photocatalysts’ preparation in situ using industrial wasterwater as raw materials and the feasibility of using photocatalysis technology in wastewater treatment area, but also the chloride ions have been removed as an available resource and the corrosion to treatment facilities has been slowed down. The phosphorus and nitrogen resources can be recycled by other subsequent recycle recoveries. It offers a novel way for the wastewater treatment process in succession from photocatalysts’ manufacture to contaminants disposal.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Zhiyuan Zhao,Jinna Zhang,Jie Yao,Shijie You
Electro-oxidation is a promising technology for removal of refractory organic pollutants. While the appeal of this technology lies in its chemical-free nature, commercially scale-up application may be limited by the availability of electrode materials and mass transport. Here we report the development of a flow-through electro-oxidation system for removal of chlorophenols in water using Magnéli-phase (Ti 4 O 7 ) tubular anode and a 304 stainless steel (SS) tubular cathode. The key to this system was the porous and conductive Magnéli-phase Ti 4 O 7 anode, the structure and composition of which was confirmed by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. System efficacy was evaluated by using 4-chlorophenol (4-CP) as a typical refractory contaminant and model chlorophenol. Under optimized conditions, a complete removal of 4-CP could be obtained within 120 min in 0.04 mol L −1 Na 2 SO 4 solution. Electro-produced HO • and direct electron transfer were both shown to contribute to the 4-CP electro-oxidation process due to the high selectivity and oxygen evolution potential of the Ti 4 O 7 anode. The intermediates of 4-CP degradation were identified and a pathway for its electro-oxidation was proposed. When challenged with industrial wastewater containing 4-CP, chemical oxygen demand (COD) and total organic carbon removal efficiencies of 67.5% and 63.1% respectively could be obtained, accounting for energy consumption of 85.1 kWh·kg COD −1 for degradation of 1 kg of COD in industrial wastewater. This study provides an effective and robust solution for the removal of refractory emerging contaminants from industrial wastewaters using a continuous-flow electro-oxidation system.
研究领域:
环境科学
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电化学工程
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PubMed
高影响因子
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