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Nano Fe_(2)O_(3)embedded in montmorillonite with citric acid enhanced photocatalytic activity of nanoparticles towards diethyl phthalate

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Journal of Environmental Sciences 2021年第3期33卷 248-259页

作者： Zhaoyue Sun Lisha Feng Guodong Fang Longgang Chu Dongmei Zhou Juan Gao Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Nano-Fe_(2)O_(3)embedded in montmorillonite particles(Fe-Mt)were prepared to degrade diethyl phthalate(DEP)with citric acid(CA)under xenon light *** to pristine montmorillonite(Na-Mt),the embedding process increased 14.5-fold of iron content and 1.8-fold of specific surface *** synthesized Fe-Mt have more oxygen vacancies than Fe_(2)O_(3)nanoparticles(nFe_(2)O_(3)),which could induce more reactive oxygen species(ROSs)generation in the presence of CA under xenon lamp ***-Mt with CA enhanced photo-assisted degradation of DEP 2.5 times as compared to nFe_(2)O_(3)with *** experiments,electron paramagnetic resonance(EPR)spectroscopy and identification of products confirmed that surface-bound·OH was the main radical to degrade *** anions(i.e.,NO_(3)-,CO_(3)^(2-),Cl^-)and humic acid could compete·OH with DEP and cause slower degradation of *** removal efficiency of DEP was more than 56%with Fe-Mt after three recycles,and the dissolved Fe concentration from Fe-Mt was below 75μmol/L,indicating Fe-Mt had a good stability as a ***-Mt together with CA appeared to be a promising strategy to remove organic pollutants in surface water,or topsoil under solar irradiation.

关键词： Heterogeneous catalyst Hydroxyl radical Photo-Fenton reactions Phthalate ester

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Rationally designed ultrathin Ni(OH)_(2)/titanate nanosheet heterostructure for photocatalytic CO_(2) reduction

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Green Chemical Engineering 2022年第3期3卷 240-249页

作者： Wanru Liao Suwei Lu Weihang Chen Shuying Zhu Yuzhou Xia Min-Quan Yang Shijing Liang College of Environmental Science and Engineering Fujian Key Laboratory of Pollution Control&Resource ReuseFujian Normal UniversityFuzhou350007China College of Chemistry Fuzhou UniversityFuzhou350108China Province University Key Laboratory of Green Energy and Environment Catalysis Ningde Normal UniversityNingde352100China National Engineering Research Center of Chemical Fertilizer Catalyst Fuzhou UniversityFuzhou350002China

Dye-sensitized photocatalysis has been extensively studied for photocatalytic solar energy conversion due to the advantage in capturing long-wavelength photons with a high absorption *** rational integration of photosensitizer with semiconductor and cocatalyst to collaboratively operate in one system is highly ***,we fabricate a Ni(OH)_(2)-loaded titanate nanosheet(Ni(OH)_(2)/H_(2)Ti_(6)O_(13))composite for high-performance dye-sensitized photocatalytic CO_(2) *** ultrathin H_(2)Ti_(6)O_(13) nanosheets with negative surface charge provide an excellent support to anchor the dye photosensitizer,while the loaded Ni(OH)2 serves as an adsorbent of CO_(2) and electron sink of *** such,the photoelectrons derived from the[Ru(bpy)3]Cl_(2) sensitizer can be targeted transfer to the Ni(OH)_(2) active sites via the H_(2) Ti_(6)O_(13) nanosheets linker.A high CO production rate of 1801μmol g^(-1) h^(-1) is obtained over the optimal Ni(OH)_(2)/H_(2)Ti_(6)O_(13),while the pure H_(2)Ti_(6)O_(13) shows significantly lower CO_(2) reduction *** work is anticipated to trigger more research attention on the rational design and synthesis of earth-abundant transition metal-based cocatalysts decorated on ultrathin 2D platforms for artificially photocatalytic CO_(2) reduction.

关键词： Titanate nanosheet Ni(OH)_(2) Photosensitizer CO_(2)reduction

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An Analysis of Liberia’s Vulnerability to Climate Change in the Context of Least Developed Countries (LDCs): A Review

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American Journal of Climate Change 2024年第2期13卷 230-250页

作者： Charles Flomo Togbah State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai China UNEP-Tongji Institute of Environment for Sustainable Development Shanghai China

Climate change is an alarming global challenge, particularly affecting the least developed countries (LDCs) including Liberia. These countries, located in regions prone to unpredictable temperature and precipitation changes, are facing significant challenges, particularly in climate-sensitive sectors such as mining and agriculture. LDCs need more resilience to adverse climate shocks but have limited capacity for adaptation compared to other developed and developing nations. This paper examines Liberia’s susceptibility to climate change as a least developed country, focusing on its exposure, sensitivity, and adaptive capacity. It provides an overview of LDCs and outlines the global distribution of carbon dioxide emissions. The paper also evaluates specific challenges that amplify Liberia’s vulnerability and constrain sustainable adaptation, providing insight into climate change’s existing and potential effects. The paper emphasizes the urgency of addressing climate impacts on Liberia and calls for concerted local and international efforts for effective and sustainable mitigation efforts. It provides recommendations for policy decisions and calls for further research on climate change mitigation and adaptation.

关键词： Least Developed Countries Liberia Climate Change Vulnerability Poverty Hunger Disease Research and Development (R&D) Adaptation

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Citizen science meets eDNA:A new boom in research exploring urban wetland biodiversity

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Environmental Science and Ecotechnology 2023年第4期16卷 65-68页

作者： Haowen Zhang Jianghua Yang Lijuan Zhang Xueping Gu Xiaowei Zhang Nanjing Foreign Language School 30 East Beijing RoadXuanwu DistrictNanjing210008China State Key Laboratory of Pollution Control&Resource School of the EnvironmentNanjing UniversityNanjing University Xianlin Campus163 Xianlin AvenueNanjing210023China Jiangsu Province Ecology and Environment Protection Key Laboratory of Chemical Safety and Health Risk Nanjing210023China

Summary The biodiversity of urban wetlands provides crucial ecosystem services and contributes to cities'***,such ecosystems are threatened by multiple stressors,such as climate change,environmental pollution,and species *** participation in biodiversity and ecological conservation is becoming an increasingly well-developed and valued approach worldwide.

关键词： biodiversity ecosystems pollution

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Flow analysis of major and trace elements in residues from large-scale sewage sludge incineration

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Journal of Environmental Sciences 2021年第4期33卷 99-109页

作者： Siyuan Yu Hua Zhang Fan Lü Liming Shao Pinjing He State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Institute of Waste Treatment&Reclamation College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Increase of sewage sludge(SS)has led to the construction of more incineration plants,exacerbating to the production of SS incineration ***,few studies have considered the mass balance of elements in large-scale SS incineration plants,affecting the residues treatment and *** this study,flow analysis was conducted for major and trace elements in the SS,the fly ash(sewage sludge ash,SSA)and bottom ash from two large-scale SS incineration *** elemental characteristics were compared with those of coal fly ash(CFA),and air pollution control residues from municipal solid waste incineration(MSWIA),as well as related *** results showed that the most abundant major element in SSA was Si,ranging from 120 to 240 g/kg,followed by Al(76–348 g/kg),Ca(26–113 g/kg),Fe(35–80 g/kg),and P(26–104 g/kg),and the trace elements were mainly Zn,Ba,Cu,and *** all the major elements were derived from *** trace elements in the SS incineration residues accounted for 82.4%–127%of those from SS,indicating that SS was the main source of trace *** partitioning of heavy metals in the SS incineration residues showed that electrostatic precipitator ash or cyclone ash with high production rates were the major pollutant *** differences in some major and trace elements could be indicators to differentiate SSA from CFA and *** with related land criteria,the pollutants in SSA should not be ignored during disposal and utilization.

关键词： Sewage sludge ash Sewage sludge incineration Electrostatic precipitator ash Cyclone ash Flow analysis Mass balance

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New mechanism of FA in composted sludge inducing Cu fixation on Albite in open-pit mine soil

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Journal of Environmental Sciences 2022年第6期34卷 142-150页

作者： Jiapeng Wan Yifan Zeng Mei Wang Bin Dong Zuxin Xu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China YANGTZE Eco-Environment Engineering Research Center China Three Gorges CorporationBeijing 100038China Shanghai Investigation Design&Research Institute Co.Ltd Shanghai 200335China

Fulvic acid(FA),typical organic matter derived from humification process in composted sludge,possesses the potential to remediate mine soils contaminated by heavy *** understand the cooper(Cu)immobilizing process in open-pit mine soil induced by FA,changes of Cu speciation in mixture of open-pit mine soil and composted sludge was tracked over 180 *** was observed that the organic-bound and residual fraction of Cu increased dramatically with the corresponding decrease of Fe/Mn oxide-bound Cu in the first 60 days,then the organic-bound fraction decreased to about its initial proportion during 60-120 days,while residual fraction still increased,and the proportion of residual Cu accounted for over85%and became stable after 120 *** reveal the mechanism of FA inducing Cu fixation on Albite which is the main phase of soil primary ore,two groups of Cu adsorption experiments with and without FA were *** the addition of FA,the adsorption capacity of Cu by Albite increased by 1.55 times and the content of residual Cu in Albite increased by7.7 *** was found that the Cu absorbed in smaller Albite particle induced by FA formed a secondary mineral——Chrysocolla,causing increase of residual fraction of *** results revealed the mechanism:FA was absorbed on the surface of Albite after complexing with Cu ions in the solution,and then it induced Cu into the interlayer and pore channels of *** Cu in the Albite was immobilized by forming Chrysocolla finally.

关键词： Fulvic acid Composted sludge Heavy metal Open-pit mine Mineralization

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Effect of sulfate on Cu(Ⅱ)sorption to polymer-supported nano-hydrated ferric oxides:Experimental and modeling studies

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Chinese Journal of Chemical Engineering 2021年第5期34卷 319-326页

作者： Wenxiang Ni Luyang Yang Xiaolin Zhang Hui Qiu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and PollutionControlSchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Incorporating of hydrous ferric oxide(HFO)inside porous supports with large sizes has become an effective way to decontaminate the water from heavy *** anions like sulfate are usually present in high concentrations in water,and might greatly affect adsorption behavior of hybrid ***,a polymer-based HFO-CPS was fabricated by encapsulating nano-HFO inside a chloromethylated polystyrene polymer(CPS)and the reactivity of HFO-CPS with Cu(Ⅱ)was evaluated in the presence of sulfate *** complexation theory was firstly employed to describe the effect of sulfate on Cu(Ⅱ)adsorption edges of hybrid HFO-CPS,where constant capacitance model(CCM)was *** available weak adsorption site Fe_((2))OH of hybrid HFO-CPS was found to decrease from 20% Fe to 5% Fe,which might be caused by the pore plugging effect after HFO *** the assumption that a ternary complex was formed,the effect of sulfate on Cu(Ⅱ)adsorption by HFO-CPS were successfully described by CCM using the optimized Fe_((2))OH site under different sulfate concentrations(1 or 10 mmol·L^(-1))and Cu/Fe ratios(0.0042 or 0.0252).It is confirmed that the formation of FeOHCuSO4 ternary surface complexes played an important role in enhancing Cu(Ⅱ)adsorption on HFO-CPS in the presence of sulfate.

关键词： Iron oxides Polymer Sulfate Adsorption Ternary complex

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Quantitative structure-activity relationship in the photodegradation of azo dyes

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Journal of Environmental Sciences 2020年第4期32卷 41-50页

作者： Guoyang Zhang Shujuan Zhang State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

The photolysis characteristics of azo dyes are critically important in environmental pollution control,dye-sensitized solar cells,and dyeing-related ***,there is still lack of quantitative relationship between the structures of azo dyes and their photolysis *** address this issue,the photolysis of 22 azo dyes were conducted side by side at three pH(4.0,6.0,9.0).The obtained pseudo-first order photodegradation rate constants(k1)were processed with ***,the hydrazone tautomer had a smaller excitation energy and was easier to undergo photolysis than the azo *** ortho-substituted sulfonate groups had an obvious protective effect on the photo stability of azo *** softness(s),the most positive and negative partial charge on a carbon atom(qC+,qC-)were found to be crucial descriptors in the establishment of QSAR models for the photo stability of azo *** QSAR model at pH 9.0 was robust for predicting the photo stability of azo dyes under UV irradiation.N2-purging experiments and quantum chemical computation verified that the cleavage of azo bond was not a result of direct photolysis but was caused by the attack of photoinduced reactive oxygen *** results here are helpful for the design of more stable azo dyes or the selection of suitable approaches for the treatment of dyecontaminated water bodies.

关键词： Azo Hydrazone Photolysis QSAR Softness

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Mxene-Supported Mil-88a(Fe) as Persulfate Activator for Removal of Tetracycline

SSRN

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SSRN 2023年

作者： Chen, Junxia Li, Weigang Yang, Zhenzhen Yang, Yuying Zhou, Qing State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

The poor conductivity，poor stability and agglomeration in water of MIL-88A(Fe) limit its application as persulfate (PS) activator in water purification. Herein, MXene-supported MIL-88A(Fe) composites(M88A/KMX) were synthe-sized to enhance its adsorption and catalytic capability for tetracycline (TC) removal. M88A/KMX-0.2 composites exhibits optimal degradation efficiency，reaching 98% under conditions of 0.2 g/L M88A/KMX-0.2, 1.0 mM PS, 20 ppm TC, and pH 5. The degradation rate constants of M88A/KMX-0.2 was 0.03217 min-1, which was much higher than that of MIL-88A (0.00159 min-1) and MXene (0.00626 min-1). The removal effects of reaction parameters, such as dosage of M88A/KMX-0.2 and PS, initial solution pH and the presence of the common co-existing constituents (humic acid and the inorganic anions) were investi-gated in detail. Additionally, the reuse of M88A/KMX-0.2 showed that the com-posites had good cycling stability. The results of electron paramagnetic reso-nance (EPR) and quenching experiments indicated that ·OH , ·SO4- and·O2- were involved in the M88A/KMX-0.2/PS system. This study offered a new avenue for sulfate-based degradation of Fe-based metal organic frame-work. © 2023, The Authors. All rights reserved.

关键词： Degradation

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Research progress on biochar materials for new pollutants removal in the aquatic environment:a mini-review

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Frontiers of Environmental Science & Engineering 2025年第3期19卷 99-118页

作者： Wulve Fan Xiaolin Shen Zhiliang Zhu Xiaochang Liu Hua Zhang Yanling Qiu Daqiang Yin State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Key Laboratory of Yangtze River Water Environment(Ministry of Education) Tongji UniversityShanghai 200092China National Engineering Research Centre of Urban Water Resources Shanghai 200082China School of Urban and Regional Science Shanghai University of Finance and EconomicsShanghai 200433China

Antibiotics,endocrine-disrupting compounds(EDCs),per-and polyfluoroalkyl substances(PFAS),and microplastics(MPs)are crucial constituents of the pollutants frequently detected in various aquatic *** pollutants can negatively affect human health and aquatic *** eliminate these new pollutants from water economically and environmentally,biochar is considered an efficient environmental functional material because of its excellent *** numerous studies have reported the concentration,distribution,and removal methods of individual new pollutants,a comprehensive and systematic understanding of biochar-based materials for the removal of multiple new pollutants from aquatic environments remains to be comprehensively ***,in this mini-review,recent research progress on biochar materials in the decontamination of new pollutants,including antibiotics,EDCs,PFAS,and MPs in different water sources,is summarized,and different mechanisms and influencing factors during the removal process are discussed to have a profound understanding of the application of biochar in the water *** studies on biochar materials for the removal of new pollutants are indicated to enlighten future exploration and alleviate new pollutant burdens in aquatic environments.

关键词： Biochar materials New pollutants Aquatic environment pollution Removal mechanisms

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