MICROCHIMICA ACTA
·
2024
·Vol. 192
·期 1
·1-12
·
IF 5.3
Liu Xiang,Li Huijun,Sun Junjun,Shi Jianchao,Xu Zhouqing,Wang Yan
A HPU-23@Ru@Tb-NH 2 sensor array with light-driven oxidase-mimicking activity and triple-emission fluorescence was developed. It was composed of a Tb 3+ -functionalized metal organic framework and Ru(bpy) 3 2+ and applied to the simultaneous detection of Hg 2+ , ClO − , and PO 4 3− via differently responsive channels. HPU-23@Ru@Tb-NH 2 had a photoresponsive colorimetric response toward Hg 2+ with a LOD as low as 4.18 nM. In addition, the three emissions of the HPU-23@Ru@Tb-NH 2 sensor array were influenced by ClO − and PO 4 3− to varying degrees, causing remarkably distinguishable responses for the fluorescence channels to discriminate ClO − and PO 4 3− from each other. The detection limits of ClO − and PO 4 3− were 12.26 µM and 0.197 nM, respectively. Therefore, this work demonstrates the feasibility of multi-emission and multi-mode sensing platform, which is able to combine the advantages of different strategies for solving the problems of various toxic substances coexisting in the environment while meeting the needs of accurate and precise results and no side interferences. Graphical
研究领域:
分析化学
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环境科学
·
生物医学
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Weihao Zhu,Lian Zhang,Peicong Li,Wei Fang,Panyue Zhang
Sewage sludge treatment remains a critical environmental challenge due to its high moisture content and heavy metal contamination. The Fe 2+ /Ca(ClO) 2 /tannic acid (TA) combined conditioning has shown great performances on sludge dewatering, but its influence on heavy metal removal and risk assessment was unclear. In this study the speciation transformation of heavy metals and related mechanisms were comprehensively investigated. The results demonstrated that the sludge conditioning simultaneously enhanced sludge dewatering and promoted heavy metal removal under optimized conditions. Notably, Zn, Cd, and Ni were effectively removed from the sludge solid phase, with removal efficiencies of 39.12 %, 52.49 %, and 30.86 %, respectively. Moreover, the conditioning significantly reduced the ecological risk posed by heavy metals, as indicated by a marked decrease in comprehensive risk index from high to medium levels. The mechanisms involved in the combined effects of oxidation, acidification, and ion binding. Oxidation disrupted extracellular polymeric substance structure, while acidification increased surface positivity, enhancing heavy metal desorption. The Fe 2+ /Ca 2+ competed with heavy metals for binding sites. Additionally, pH reduction and TA chelation further facilitated the transfer of heavy metals into the liquid phase. As a result, the potential mobility index for heavy metals Zn, Cd, Ni, Hg, and As decreased by 33.93 %, 35.98 %, 21.40 %, 26.76 %, and 50.57 %, respectively. This study provides a promising strategy for the safe and resource-efficient utilization of sewage sludge.
研究领域:
环境科学
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化学工程
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废弃物管理
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环境毒理学
·
水处理
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DOI
高影响因子
Engineering
·
2025
·
IF 11.6
Bin Zhao,Jialin Yang,Ruiping Liu,Jiuhui Qu,Meng Sun
The contamination of wastewater with organic pollutants and nitrogen compounds poses significant environmental challenges. The primary objective of wastewater treatment is the simultaneous denitrification and decarbonization of ammonia nitrogen into harmless by-products. This study presents a novel method for the directional generation of chlorine radical species like ·ClO and ·Cl using electro-reactive membranes (EMs), which were fabricated using an electro-deposition coupled template approach known as RuO 2 @PbO 2 -M. This method facilitates the rapid and efficient conversion of ammonia to nitrogen and concurrently reduces the chemical oxygen demand in the effluent. Our system achieved ultra-efficient simultaneous denitrification and decarbonization with minimal energy consumption in single-filtration mode, thereby eliminating the need for chemical precursors. We elucidate the formation pathway of ·ClO and ·Cl during the electrochemical oxidation process involving RuO 2 @PbO 2 -M, where ·Cl generated from RuO 2 reacts with ·OH from PbO 2 under hypochlorous acid conditions, thereby enhancing nitrogen and carbon removal. These findings highlight a novel filtration model that utilizes single-channel electro-filtration and an innovative reactive membrane design for ·ClO synthesis, which provides a new research framework for the concurrent removal of nitrogen and carbon, and offers a promising solution to enhance wastewater treatment efficiency.
研究领域:
环境科学
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水处理技术
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电化学
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膜科学
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化学工程
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可持续废水管理
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Wenxiao Zheng,Liuyi Zhu,Sheng Liang,Jinshao Ye,Xin Yang,Zhenchao Lei,Zhang Yan,Yongdong Li,Chaohai Wei,Chunhua Feng
Inorganic constituents in real wastewater, such as halides and carbonates/bicarbonates, may have negative effects on the performance of electrochemical systems because of their capability of quenching HO•. However, we discovered that the presence of Cl– and HCO3– in an electrochemical system is conducive to the formation of ClO•, which plays an important role in promoting the simultaneous elimination of biorefractory organics and nitrogen in secondary coking wastewater effluent. The 6-h operation of the coupled electrochemical system (an undivided electrolytic cell with a PbO2/Ti anode and a Cu/Zn cathode) at a current density of 37.5 mA cm–2 allowed the removal of 87.8% of chemical oxygen demand (COD) and 86.5% of total nitrogen. The electron paramagnetic resonance results suggested the formation of ClO• in the system, and the probe experiments confirmed the predominance of ClO•, whose steady-state concentrations (8.08 × 10–13 M) were 16.4, 26.5, and 1609.5 times those of Cl2•– (4.92 × 10–14 M), HO• (3.05 × 10–14 M), and Cl• (5.02 × 10–16 M), respectively. The rate constant of COD removal and the Faradaic efficiency of anodic oxidation obtained with Cl– and HCO3– was linearly proportional to the natural logarithm of the ClO• concentration, and the specific energy consumption was inversely correlated to it, demonstrating the crucial role of ClO• in pollutant removal.
研究领域:
环境工程
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水处理
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电化学
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DOI
PubMed
高影响因子
Analytical Methods
·
2013
·Vol. 5
·期 20
·5589-5596
·
IF 1.855
Guangfei Wu,Fang Zeng,Shuizhu Wu
Hypochlorite is one of the biologically important reactive oxygen species (ROS). Herein, a BODIPY-based fluorescent probe (BOD-OXIME) has been designed and synthesized for fluorescence detection of hypochlorite in aqueous media and imaging in live cells. Incorporating hydrophilic carboxyl and hydroxyl moieties makes the probe BOD-OXIME highly water soluble, thus making it operable in totally aqueous media. Besides, the probe can respond quickly toward hypochlorite in aqueous media. This new probe exhibits high selectivity and sensitivity towards ClO− over other reactive oxygen species (ROS) and reactive nitrogen species (RNS). Furthermore, the probe BOD-OXIME can be successfully applied to image both exogenous and endogenous ClO− in living cells.
研究领域:
分析化学
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生物化学
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细胞生物学
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材料科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
·
IF 5.667
Lu-Shuang Li,Xin-Yue Jiao,Yu Zhang,Cheng Cheng,Kun Huang,Li Xu
In the present study, highly fluorescent carbon dots were prepared by using citric acid as the carbon source with the binary dopants, i.e. melamine and formaldehyde, named as MF-CDs. The co-dopants played a crucial role to enhance the fluorescence quantum yield of the MF-CDs, reaching 48%, in which melamine was the major nitrogen source, while formaldehyde was the co-dopant to regulate the state of nitrogen in the MF-CDs. The fluorescence of the MF-CDs was found to be quenched by Hg 2+ , and then recovered equally by individual halogen ions (eg. Cl − , Br − and I − ). Correspondingly, the “turn off” and “turn off-on” sensing systems were separately established to detect Hg 2+ and total halogen ions with good accuracy and reliability. In addition, the fluorescence of the MF-CDs was quenched by ClO − , and recovered by Fe 2+ ; the “turn off” sensor was established to detect ClO − in tap water with low limit of detection of 0.18 μM, and the “turn off-on” sensor was to determine the ferrous succinate in ferrous succinate tablets. Furthermore, owing to the low cytotoxicity, the MF-CDs were successful for cellular labeling on HepG2 cells. The developed binary dopants were effective to enhance the fluorescence quantum yield and endow the MF-CDs with some special properties, which would help to widen the applicability of the carbon dots.
研究领域:
材料科学
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分析化学
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生物医学
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DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
Shan He,Wen-Le Fang,Xiao-Feng Guo,Hong Wang
Redox homeostasis is the guarantee for the normal operation of living organisms. Given its importance, monitoring dynamic changes of redox state will facilitate the study of relevant physiological and pathological processes. Herein, a two-photon fluorescent probe NA-Se with selenomorpholine as the response site has been developed for reversible detection of redox state. NA-Se exhibits outstanding analytical performance, including a rapid response to ClO − within 8 s, a detection limit as low as 13.3 nM, and at least 10 redox reversible cycles. Furthermore, NA-Se has improved water solubility and extremely low cytotoxicity, making it ideal for bioimaging. Finally, NA-Se has been successfully applied to monitor the ClO − /GSH redox cycle in living cells and zebrafish. This work may provide an effective tool for studying redox state and related diseases in vivo.
研究领域:
生物化学
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医学影像
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细胞生物学
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DOI
高影响因子
JOURNAL OF CHEMICAL EDUCATION
·
2023
·
IF 3
Min Lu,Ziyi Yang,Zihan Ding,Tao Liang
Fluorescence analysis is an important technology, which can obtain the concentration of target analytes through comparing the fluorescence intensity change of a fluorescent sensor. Generally, the fluorescence intensity is measured by a fluorometer. However, many undergraduates have no chance to operate such an expensive instrument. Besides, the students cannot see the fluorescence of the obscured samples during the fluorometer-based detection process. Herein, a flexible experiment for fluorescence analysis was designed using a smartphone for recording fluorescence photographs and the software, Photoshop or ImageJ, for measuring the fluorescence intensity. The change in fluorescence intensity can be directly observed by naked eyes and be quantitatively measured by Photoshop or ImageJ. RhBN, with a simple synthetic process, was chosen as a ClO– sensor, whose fluorescence emission significantly increased in the presence of ClO– because of the strongly enlarged conjugated system. The experimental course designed in this article overcame the requirement of an expensive fluorometer and provided an interesting and simple approach for educating undergraduates about fluorescence analysis and fluorescent sensors.
研究领域:
化学教育
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
·
IF 7.9
Sung-Hyo Jung,Kinza Shahid,Seong-Jik Park,Chang-Gu Lee
To mitigate the risk of toxic cyanide emissions from metal-plating wastewater, the development of treatment strategies capable of addressing recalcitrant metal-cyanide complexes is essential. In this study, a dual-oxidant system combining chlorine dioxide (ClO 2 ) with the conventional sodium hypochlorite (NaClO)-based alkaline chlorination process was investigated to enhance the degradation of metal-cyanide complexes, including tetracyanonickelate (Ni-CN), zinc cyanide (Zn-CN), and ferricyanide (Fe-CN). Under practical operating conditions (initial cyanide concentration of 50 mg/L, total chlorine of 50 mM, pH 10), the combined NaClO/ClO 2 system achieved significantly higher degradation efficiencies for all target pollutants (Ni-CN = 93.6 ± 1.3%, Zn-CN = 96.8 ± 0.0%, Fe-CN = 44.6 ± 1.1%) compared with the single NaClO system (Ni-CN = 27.8 ± 1.1%, Zn-CN = 87.1 ± 3.2%, Fe-CN = 13.9 ± 1.1) after 60 min of reaction. Electrochemical analysis showed that ClO 2 exhibited a higher redox potential, whereas NaClO primarily existed as the less oxidative hypochlorite ion at pH 10. The system demonstrated strong resistance to interference from inorganic anions and metal ions commonly found in plating wastewater. Furthermore, its application to real plating wastewater validated the practical feasibility of the system. These findings offer insight into a practical, adaptable, and easily integrable strategy for treating cyanide-bearing effluents using existing treatment facilities.
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高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Huiqing Li,Zhenni Wei,Xianwei Zuo,Hongli Chen,Cuiling Ren,Yalei Dong,Xingguo Chen
Hypochlorite (ClO − ) and antioxidants have been reported closely correlated with oxidative stress and related diseases. In recent years, many probes, especially fluorescent and colorimetric probes, have been developed to detect ClO − and antioxidants. It is meaningful to develop probes which can be used to detect them in these two modes. Herein, a novel dual mode carbon dots (DM-CDs) which can rapidly respond to ClO − and antioxidants by both fluorescent and colorimetric mode were synthesized. GSH was chosen as model antioxidants to evaluate its detection performance. The fluorescence of DM-CDs can be quenched by ClO − and then recovered by GSH, so sensitive and accurate detection of ClO − and GSH can be achieved. Meanwhile, the colour variation of this system can be observed by naked eye and detected quantitatively by UV–Vis spectra. The excellent analytical performance of DM-CDs together with their good biocompatibility endow them with great feasibility in cell imaging and real-time detection of intracellular ClO − and GSH.
研究领域:
分析化学
·
生物医学
·
材料科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Xiao Liu,Qingqing Tan,Weiheng Kong,Yan Zhao,Fengli Qu
Upconversion nanoparticles (UCNPs), as a type of light-emitting nanomaterials excited by near-infrared (NIR) light, can circumvent interference from spontaneous fluorescence and scattered light emitted by biological molecules in sensing applications. Traditional homogeneous core–shell UCNPs struggle to locate the position of luminescent doped ions (such as Tm 3+ ) within the NaYF 4 matrix, only the luminescent ions close to the surface of the particles can be efficiently quenched, with a low bursting efficiency that produces a considerable background. The full effectiveness energy transfer exists only by sufficiently close proximity between donor and acceptor. Here, a distance dependence “sandwich” structured NIR fluorescent probe UCNPs-IR820 was developed based on luminescence resonance energy transfer (LRET), where the luminescent ions (Tm 3+ ) were secured in a intermediate layer of a core-middle-shell UCNPs structure, which could be quenched by the specific distance external adjacent receptor molecule (cyanine NIR dye IR820). In the presence of the analyte ClO − , the double bonds of IR820 were oxidized, unable to absorb the luminescence from the core-middle-shell “sandwich” UCNPs, thus an “off to on” luminescence was restored. This core-middle-shell design could effectively enhance the effect of LRET-based detection strategies through physically meaningful distance constraints, providing new ideas for the design of future UCNP-based NIR fluorescent probes.
研究领域:
生物化学
·
分析化学
·
纳米医学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Yong Tang,Yuanyuan Li,Lei Liu,Haocheng Ni,Juan Han,Lei Wang,Yanli Mao,Liang Ni,Yun Wang
A simple colorimetric and fluorescent probe bearing coumarin and p-toluenesulfonyl hydrazide moieties was developed, which was capable of displaying excellent selectivity for hypochlorite. The distinct absorption spectral shift (49 nm) was induced by ClO − -triggered oxidative hydrolysis of C N double bonds in aqueous solution, which was accompanied by the optical variation from yellow to colorless. Besides, this probe solution underwent a dramatic intensification (162-fold) of the fluorescence signaling at 444 nm via the addition of ClO − (3 equiv.) within a short time. More importantly, the results achieved by fluorescence spectra revealed an excellent linear relation of probe 1 for ClO − with excellent sensitivity (9.1 nM). Further, the good recoveries and cellular experiments verified the prospective functions of this probe in real water environment and SW 480 cells.
研究领域:
生物化学
·
分析化学
·
医学检测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）