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Construction of eco-friendly dual carbon dots ratiometric fluorescence probe for highly selective and efficient sensing mercury ion

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Journal of environmental Sciences 2025年第2期148卷 1-12页

作者： Yongli Liu Xiaoyan Su Huanjia Liu Guifen Zhu Guobei Ge Yuxin Wang Penghui Zhou Qingxiang Zhou School of environment Henan Key Laboratory for Environmental Pollution ControlKey Laboratory for Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China College of Chemical Engineering and environment China University of Petroleum-BeijingBeijing 102249China

In present work,blue carbon dots(b-CDs)were derived from ammonium citrate and guanidine hydrochloride,and red carbon dots(r-CDs)were stemmed from malonate,ethylenediamine and meso-tetra(4-carboxyphenyl)porphin based on facile hydrothermal ***-friendly ratiometric fluorescence probe was innovatively constructed to effectively measure Hg2+utilizing b-CDs and *** developed probe displayed two typical emission peaks at 450 nm from b-CDs and 650 nm from r-CDs under the excitation at 360 *** ion has strong quenching effect on the fluorescence intensity at 450 nm due to the electron transfer process and the fluorescence change at 450 nm was used as the response signal,whereas the fluorescence intensity at 650 nm kept unchangeable which resulted from the chemical inertness between Hg^(2+)and r-CDs,serving as the reference signal in the sensing *** optimal circumstances,this probe exhibited an excellent linearity between the fluorescence response values of F450/F650 and Hg^(2+)concentrations over range of 0.01-10μmol/L,and the limit of detectionwas down to 5.3 nmol/***,this probe was successfully employed for sensing Hg^(2+)in practical environmental water samples with satisfied recoveries of 98.5%-105.0%.The constructed ratiometric fluorescent probe provided a rapid,environmental-friendly,reliable,and efficient platform for measuring trace Hg^(2+)in environmental field.

关键词： Blue carbon dots Red carbon dots Electron transfer Hg^(2+) Eco-friendliness

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Current research status on the distribution and transport of micro(nano)plastics in hyporheic zones and groundwater

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Journal of environmental Sciences 2025年第5期151卷 387-409页

作者： Dongming Zhang Qiqing Chen Ting Xu Daqiang Yin key laboratory of yangtze river water environment Ministry of EducationCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China State key laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China

Micro(nano)plastics,as an emerging environmental pollutant,are gradually discovered in hyporheic zones and *** studies have focused on the origin and spatial/temporal distribution of micro(nano)plastics in regional groundwater,together with the influence of their properties and effects of environmental factors on their ***,the transport of micro(nano)plastics in the whole hyporheic zone-groundwater system and the behavior of co-existing substances still lack a complete theoretical *** provide systematic theoretical support for that,this review summarizes the current pollution status of micro(nano)plastics in the hyporheic zone-groundwater system,provides a comprehensive introduction of their sources and fate,and classifies the transport mechanisms into mechanical transport,physicochemical transport and biological processes assisted transport fromthe perspectives ofmechanical stress,physicochemical reactions,and bioturbation,***,this review proposes to advance the understanding of the multi-dimensional hydrosphere transport of micro(nano)plastics centered on groundwater,themicroorganisms-mediated synergistic transformation and co-transport involving the intertidal ***,this review systematically dissects the presence and transport cycles of micro(nano)plastics within the hyporheic zone-groundwater system and proposes prospects for future studies based on the limitations of current studies.

关键词： Micro(nano)plastics Groundwater Hyporheic zone Transport mechanisms Abundance

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Effect of lysozyme combined with hydrothermal pretreatment on excess sludge and anaerobic digestion

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Journal of environmental Sciences 2025年第1期147卷 36-49页

作者： Xiuqin Cao Songyue Li Chaolei Liu School of environment and Energy Engineering Beijing University of Civil Engineering and ArchitectureBeijing 100044China key laboratory of Urban Storm water System and water environment(ministry of education) Beijing University of Civil Engineering and ArchitectureBeijing 100044China

Anaerobic digestion(AD)is widely employed for sludge stabilization and waste ***,the slow hydrolysis process hinders methane production and leads to prolonged sludge *** this study,an efficient and eco-friendly lysozyme pre-treatment method was utilized to address these *** optimizing lysozyme dosage,hydrolysis and cell lysis were ***,lysozyme combined with hydrothermal pretreatment enhanced overall *** indicate that:(1)When lysozyme dosage reached 90 mg/g TS after 240 min of pretreatment,SCOD,soluble polysaccharides,and protein content reached their maxima at 855.00,44.09,and 204.86 mg/L,*** represented an increase of 85.87%,365.58%,and 259.21%compared to the untreated *** fluorescence spectroscopy revealed the highest fluorescence intensity in the IV region(soluble microbial product),promoting microbial metabolic activity.(2)Lysozyme combined with hydrothermal pretreatment significantly increased SCOD,soluble proteins,and polysaccharide release from sludge,reducing SCOD release *** experiments identified Group 3 as the most effective for SCOD and soluble polysaccharide release,while Group 9 released the most soluble *** significance order of factors influencing SCOD,soluble proteins,and polysaccharide release is hydrothermal temperature>hydrothermal time>enzymatic digestion time.(3)The lysozyme-assisted hydrothermal pretreatment group exhibited the fastest release and the highest SCOD concentration of 8,135.00 mg/L during anaerobic *** SCOD consumption and cumulative gas production increased by 95.89%and 130.58%,respectively,compared to the control group,allowing gas production to conclude 3 days earlier.

关键词： Excess sludge Lysozyme Hydrothermal pre-treatment Anaerobic digestion Gas production

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Boosting singlet oxygen generation for salinity wastewater treatment through co-activation of oxygen and peroxymonosulfate in photoelectrochemical process

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Fundamental Research 2025年第1期5卷 165-173页

作者： Qianqian Yang Zhiyuan Feng Yanbo Zhou Hongying Zhao Guohua Zhao Shanghai key Lab of Chemical Assessment and Sustainability Key Laboratory of Yangtze River Water EnvironmentSchool of Chemical Science and EngineeringTongji UniversityShanghai 200092China key laboratory of Coal Gasification and Energy Chemical Engineering of ministry of education East China University of Science and TechnologyShanghai 200092China

High concentrations of inorganic ions in saline wastewater pose adverse effects on hydroxyl radical(HO•)-dominated ***,we report a unique strategy for boosting singlet oxygen(^(1)O_(2))generation via coactivation of oxygen and peroxymonosulfate(PMS)by regulating the electron transfer regime in the photoelectrochemical *** Fe-N bridge in atomic Fe-modified graphitic carbon nitride(denoted SA-FeCN)favors the construction of electron-defective Fe and electron-rich N vacancies(Nvs)to accelerate directional electron *** produced intermediate(HSO_(4-)O···Fe−Nvs···O-O)as a chemical channel accelerates the directional electron transfer from PMS to further reduce O_(2)to form activated products(SO_(5)^(•−),O_(2)^(•−)),thereby transforming O_(2)into^(1)O_(2).An optimized^(1)O_(2)generation rate of 39.4μmol L^(−1)s^(−1)is obtained,which is 15.7–945.0 times higher than that in traditional advanced oxidation *** kinetics are achieved for removing various phenolic pollutants in a nonradical oxidation pathway,which is less susceptible to the coexistence of natural organic matter and inorganic *** COD removal for coal wastewater and complex industrial wastewater in real scenarios is found to reach a value of 90%-96%in 3 *** work provides a new direction for boosting the 1O2 generation rate,especially for the selective degradation of target electron-rich contaminants in saline wastewater.

关键词： Photoelectrochemical process Singlet oxygen Oxygen activation Peroxymonosulfate activation Electron transfer Saline wastewater

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Mass organic matter accumulation induced by rapid redox variations in lakes:Evidence from the Miaoxi area,Bohai Bay Basin,China

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Journal of Palaeogeography 2025年第01期14卷 291-313页

作者： Peng Sun Hai-Feng Yang Fei-Long Wang Jun-Pei Yue Yan-Fei Gao You-Jun Tang School of Petroleum Engineering Yangtze University key laboratory of Exploration Technologies for Oil and Gas Resources Ministry of Education Yangtze University Tianjin Branch of China National Offshore Oil Corporation College of Resource and environment Yangtze University

The Member 4 of the Paleogene Shahejie Formation(Es4) in the Bohai Bay Basin is interspersed with a set of high-quality source rocks typified as intercalation of red and black mudstones. A large amount of petroleum(crude oil) originates from these source rocks. The Paleocene-Eocene Thermal Maximum(PETM)event occurred during the deposition of Es4 in the Bohai Bay Basin, and the organic matter enrichment model under this event is worth further investigation due to its relationship with and influence on petroleum accumulations. Well LK25-A, as the first oil exploration well drilled into the Es4 in Miaoxi area, serves as a valuable case to study organic matter accumulation. In this study, we integrate total organic carbon(TOC),Rock-Eval pyrolysis, microscopic observation, vitrinite reflectance(VRo), elemental analysis, and gas chromatography-mass spectrometry(GC-MS) to evaluate the hydrocarbon generation potential, organic matter types, thermal maturity, and sedimentary environment of the Es4 in Miaoxi area. The analysis of maceral and rock pyrolysis data reveals that Type I and Type II organic matter make up the majority of Paleogene mudstones in this region. The TOC and rock pyrolysis data show that mudstones in this area have high organic matter abundance and oil-generation potential. The measured vitrinite reflectance distribution of mudstone samples, which ranges from 0.3% to 0.74%, demonstrates that the Paleogene strata are at the immature to mature stage, and the samples from this area contain a sizable amount of bituminite and mineralbituminous groundmass. The analysis of biomarkers in the mudstone samples indicates that most of the mudstones in this area are in lacustrine and brackish-hypersaline lacustrine environment under a reducing condition, and some of the red mudstones in the Es4 are formed under a suboxic condition. Based on the size and morphology of the pyrite framboid, the redox conditions of the water mass during deposition or diagenesis are further

关键词： Hydrocarbon generation potential Biomarkers Optical microscopy Pyrite framboid Elemental geochemistry Red–black beds

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Genesis of geothermal water in the hinterland of Guanzhong Basin， China: Insight from hydrochemical and isotopic analysis

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Journal of Earth Science 2025年

作者： Jiangxia Wang Panpan Xu Hui Qian Yongqi Zang Qiming Wang Zhiyuan Ma School of water and environment， Chang'an University key laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the ministry of education， Chang'an University key laboratory of Eco-hydrology and water Security in Arid and Semi-arid Regions of ministry of water Resources， Chang'an University

The Guanzhong Basin， located in Shaanxi Province， China， has abundant geothermal resources in its hinterland. Focusing on typical thermal reservoir structural units， namely the Xianli fault-step (XL) and Xi'an depression (XA)， this study reveals the genesis of geothermal water by combining hydrochemistry and environmental isotopes. The geothermal waters of XL uniformly correspond to the Na-Cl type with high contents of major ions， while the geothermal water of XA has complex hydrochemical types. The quartz geothermometer (with maximum steam loss) and Na-K-Ca geothermometer are recommended for XL and the quartz geothermometer (with no and maximum steam loss) and Na-K geothermometer for XA. Their temperature ranges are 99-159℃ and 93-146℃， respectively. The circulation depth of geofluids in XL and XA range from 2579 to 4766 m and from 2541 to 4330 m， with mean apparent ages of 21543 and 20345 yr B.P.， respectively. The geothermal water in XL originates from a mixture of sedimentary water and ancient infiltration water， and its formation mode was the vertical heat conduction with cooling process. In contrast， the geothermal water in XA originates from the dual process of cooling and mixing， with the process being dominated by ancient infiltration water and supplementation by modern infiltration water.

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A novel and visible ratiometric fluorescence determination of carbaryl based on red emissive carbon dots by a solvent-free method

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Chinese Chemical Letters 2025年第2期36卷 314-318页

作者： Meiling Xu Xinyang Li Pengyuan Liu Junjun Liu Xiao Han Guodong Chai Shuangling Zhong Bai Yang Liying Cui College of Resources and environment Jilin Agricultural University State key laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University key laboratory of Straw Biology and Utilization The Ministry of Education Jilin Agricultural University

In this study, a simple and effective ratiometric fluorescence method has been developed for carbaryl detection, utilizing red emissive carbon dots（R-CDs）. The underlying principle of this proposed strategy relies on the rapid hydrolysis of carbaryl under an alkaline condition and production of 1-naphthol with blue-emission at 462 nm. Furthermore, the as-synthesized R-CDs（Em. 677 nm）, serve as a reference, enhancing the visual tracking of carbaryl through the transformation of fluorescent color from red to *** concentration of carbaryl exhibits a commendable linear correlation with the ratio of fluorescence intensity, ranging from 0 to 20 μg/m L（R2= 0.9989） with a low detection limit of 0.52 ng/m L. Additionally, the described methodology can be used for the enzyme-free visual assay of carbaryl, even in the presence of other carbamate pesticides and metal ions, in tap water and lake water samples with excellent accuracy（spiked recoveries, 94%–106.1%）, high precision(relative standard deviation（RSD） ≤ 2.42),and remarkable selectivity. This fast and highly sensitive naked-eye ratiometric sensor holds immense promise for carbaryl detection in intricate environments and food safety fields.

关键词： Carbaryl detection Carbon dots Fluorescence sensor Quantum yield Visual detection

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Insight into the bimetallic structure sensibility of catalytic nitrate reduction over Pd-Cu nanocrystals

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Journal of environmental Sciences 2025年第3期149卷 221-233页

作者： Zhiqiang Zhang Wenhang Li Cailin Zheng Kunyu Chen Heliang Pang Wenxin Shi Jinsuo Lu School of environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi’an 710055China key laboratory of Northwest water Resources Environment and EcologyMinistry of EducationXian 710055China State key laboratory of Urban water Resource and environment Harbin Institute of TechnologyHarbin 150090China Construction engineering quality and safety supervision center station House and Urban Rural Development Department of AnkangAnkang 725000China College of Urban Construction and environmental Engineering Chongqing UniversityChongqing 400044China

Catalytic reduction of nitrate over bimetallic catalysts has emerged as a technology for sustainable treatment of nitrate-containing ***,the structure of bimetallic has been much less investigated for catalyst ***,two main types of Pd-Cu bimetallic nanocrystal structures,heterostructure and intermetallic,were prepared and characterized using high-resolution transmission electron microscopy(HRTEM),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).The results show that two individual Pd and Cu nanocrystals with a mixed interface exist in the heterostructure nanocrystals,while Pd and Cu atoms are uniformly distributed across the intermetallic Pd-Cu *** catalytic nitrate reduction experiments were carried out in a semibatch reactor under constant hydrogen *** nitrate conversion rate of the heterostructure Pd-Cu nanocrystals supported onα-Al_(2)O_(3),γ-Al_(2)O_(3),SBA-15,and XC-72R exhibited 3.82-,6.76-,4.28-,2.44-fold enhancements relative to the intermetallic nanocrystals,and the nitrogen and nitrite were the main products for the heterostructure and intermetallic Pd-Cu nanocrystals,*** indicates that the catalytic nitrate reduction over Pd-Cu catalyst is sensitive to the bimetallic structures of the catalysts,and heterostructure bimetallic nanocrystals exhibit better catalytic performances on both the activity and selectivity,which may provide new insights into the design and optimization of catalysts to improve catalytic activity and selectivity for nitrate reduction in water.

关键词： Catalytic nitrate reduction Pd-Cu bimetallic catalyst Heterostructure Intermetallic Activity and selectivity

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Barrierless reactions of C2 Criegee intermediates with H_(2)SO_(4)and their implication to oligomers and new particle formation

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Journal of environmental Sciences 2025年第3期149卷 574-584页

作者： Yang Cheng Chao Ding Tianlei Zhang Rui Wang Ruxue Mu Zeyao Li Rongrong Li Juan Shi Chongqin Zhu Institute of Theoretical and Computational Chemistry Shaanxi Key Laboratory of CatalysisSchool of Chemical&Environment ScienceShaanxi University of TechnologyHanzhongShaanxi 723001China College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing 100190China

The formation of oligomeric hydrogen peroxide triggered by Criegee intermediate maybe contributes significantly to the formation and growth of secondary organic aerosol(SOA).However,to date,the reactivity of C2 Criegee intermediates(CH_(3)CHOO)in areas contaminated with acidic gas remains poorly ***,high-level quantum chemical calculations and Born-Oppenheimer molecular dynamics(BOMD)simulations are used to explore the reaction of CH_(3)CHOO and H_(2)SO_(4)both in the gas phase and at the airwater *** the gas phase,the addition reaction of CH_(3)CHOO with H_(2)SO_(4)to generate CH_(3)HC(OOH)OSO_(3)H(HPES)is near-barrierless,regardless of the presence of water *** simulations showthat the reaction at the air-water interface is even faster than that in the gas *** calculations reveal that the HPES has a tendency to aggregate with sulfuric acids,ammonias,and water molecules to form stable clusters,meanwhile the oligomerization reaction of CH_(3)CHOO with HPES in the gas phase is both thermochemically and kinetically ***,it is noted that the interfacial HPES−ion can attract H_(2)SO_(4),NH_(3),(COOH)_(2)and HNO_(3)for particle formation from the gas phase to the water ***,the results of this work not only elucidate the high atmospheric reactivity of C2 Criegee intermediates in polluted regions,but also deepen our understanding of the formation process of atmospheric SOA induced by Criegee intermediates.

关键词： Criegee intermediates H_(2)SO_(4) Atmospheric behavior Air-water interface Chemical processes

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The photo-based treatment technology simultaneously removes resistant bacteria and resistant genes from wastewater

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Journal of environmental Sciences 2025年第2期148卷 243-262页

作者： Zicong Guo Xiang Tang Wenjun Wang Zhangxiong Luo Yuxi Zeng Nan Zhou Zhigang Yu Dongbo Wang Biao Song Chengyun Zhou Weiping Xiong College of environmental Science and Engineering and key laboratory of environmental Biology and Pollution Control(ministry of education) Hunan UniversityChangsha 410082China Fujian Provincial key laboratory of Soil environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China School of Resources and environment Hunan University of Technology and BusinessChangsha 410205China Australian Centre for water and environmental Biotechnology The University of QueenslandBrisbaneQLD 4072Australia

Because of the recent widespread usage of antibiotics,the acquisition and dissemination of antibiotic-resistance genes(ARGs)were prevalent in the majority of ***,the biological wastewater treatment processes used in wastewater treatment plants have a limited efficiencies of antibiotics resistant bacteria(ARB)disinfection and ARGs degradation and even promote the proliferation of ***,ARB and ARGs in effluent pose potential risks if they are not further *** oxidation is considered a promising disinfection technology,where the photocatalytic process generates many free radicals that enhance the interaction between light and deoxyribonucleic acid(DNA)for ARB elimination and subsequent degradation of *** reviewaims to illustrate the progress of photocatalytic oxidation technology for removing antibiotics resistant(AR)from wastewater in recent *** discuss the sources and transfer of ARGs in *** overall removal efficiencies of ultraviolet radiation(UV)/chlorination,UV/ozone,UV/H_(2)O_(2),and UV/sulfate-radical based system for ARB and ARGs,as well as the experimental parameters and removal mechanisms,are systematically *** contribution of photocatalytic materials based on TiO_(2) and g-C_(3)N_(4) to the inactivation of ARB and degradation of ARGs is highlighted,producingmany free radicals to attack ARB and ARGs while effectively limiting the horizontal gene transfer(HGT)in ***,based on the reviewed studies,future research directions are proposed to realize specific photocatalytic oxidation technology applications and overcome current challenges.

关键词： Antibiotics resistant genes Antibiotics resistant bacteria Photocatalytic oxidation

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