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SSRN 2024年

作者： Wang, Ning Bai, Yubing Guo, Zhanqiang Fan, Yu Meng, Fanxin Beijing Information Science and Technology University School of Economics and Management Beijing100192 China China Association of Circular Economy Beijing100037 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Beijing Key Lab of Green Development Decision Making Based on Big Data Beijing100192 China

Climate change and sustainable development are two crucial drivers of transformation within economic development models. In turn, carbon emission reduction and the circular economy are two key engines pushing forward climate change and sustainable development programs, but the question remains, do they synergize with one another, or work against each other? This study approaches this question from both theoretical and practical perspectives. Utilizing a framework that combines theory and practice, bibliometric analysis and big data analysis of text were used to analyze the Web of Science database and 2.29GB of data taken from cases in China, to understand what synergies exist between carbon emission reduction and the circular economy. The study reveals that the predominant interaction between the circular economy and carbon emission reduction is synergistic, with few offsetting effects. In other words, the circular economy significantly promotes carbon emissions reduction. At the theoretical level, the two fields are gradually evolving toward in-depth research, while at the practical level, collaboration is coalescing around four areas: hot fields, potential fields, auxiliary fields and common goals. A noteworthy contribution of this study is the development of a framework that synergizes theory and practice, providing a structured approach for future research in this domain. By quantifying the synergistic and offsetting relationship between the circular economy and carbon emissions reduction through systematic big data analysis, this research offers insights essential for achieving the UN’s Sustainable Development Goals. We also emphasize the importance of diverse case studies and multi-dimensional data analyses in future research endeavors. © 2024, The Authors. All rights reserved.

关键词： Climate change

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Molecular Tracers, Mass Spectral Tracers and Oxidation of Organic Aerosols Emitted from Cooking and Fossil Fuel Burning Sources

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SSRN 2022年

作者： Liang, Chengrui Wang, Shuxiao Hu, Ruolan Huang, Guanghan Xie, Jinzi Zhao, Bin Li, Yuyang Zhu, Wenfei Guo, Song Jiang, Jingkun Hao, Jiming State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China College of Environmental Sciences and Engineering Peking University Beijing100871 China

Secondary organic aerosol (SOA) composes a substantial fraction of atmospheric particles, yet the formation and aging mechanism of SOA remains unclear. Here we investigate the initial oxidation of primary organic aerosol (POA) and further aging of SOA in winter Beijing by using aerosol mass spectrometer (AMS) measurements along with offline molecular tracer analysis. ME-2 source apportionment was conducted to capture the characteristic of source-related SOA, and connect them with specific POA. Our results show that urban cooking and fossil fuel burning sources contribute significantly (17% and 20%) to total organic aerosol (OA) in winter Beijing. Molecular tracer analysis by GC×GC reveals that cooking SOA (CSOA) is produced through both photooxidation and aqueous-phase processing, while less oxidized SOA (LO-SOA) is the photooxidation product of fossil fuel burning OA (FFOA) and may experience aqueous-phase aging to form more-oxidized oxygenated OA (MO-OOA). Furthermore, C 3 HO 2 + and C 4 H 5 O 2 + are mass spectral tracers indicating the initial photooxidation, while CH 2 O + and C 2 H 2 O 2 + imply further aqueous-phase aging of OA. Tracer analysis indicates that the formation of diketones dominates the initial photooxidation of POA, while the formation of glyoxal and diacids dominates the further aqueous-phase aging of SOA. © 2022, The Authors. All rights reserved.

关键词： Photooxidation

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Can the Ecological Redline Policy Conserve Mangrove More Effectively? Assessment on the Coverage and Carbon Storage in Mangrove of Southern China

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SSRN 2024年

作者： Liang, Jin Peng, Yisheng Chen, Hanxi Wang, Yafei Xing, Yu Liao, Yan School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen University Guangzhou510006 China Sun Yat-sen University Zhuhai51900 China South China Institute of Environmental Sciences Ministry of Ecology and Environment State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control Guangzhou510655 China

Mangrove ecosystems are famed for their crucial ecological functionalities in moderating the global carbon cycling process. In 2017, the Chinese government implemented the Ecological Redline Policy (ERP) nationwide to protect various ecological functions. However, there is a lack of multi-temporal, high-resolution spatial studies evaluating the effectiveness of ERP in mangrove protection, which hinders sustainable mangrove management. This study focuses on mangroves in Guangdong Province, China, which has the most extensive mangrove distribution in the country, during 2013, 2017, and 2021 using Landsat-8 OLI images (30 m). Field surveys provided data on floral components, forest structure, and biomass of mangrove sites. Subsequently, we assessed the current storage of blue carbon in mangroves using an InVEST Carbon Storage and Sequestration model. Additionally, we estimated the future capacity of blue carbon storage and sequestration under different scenarios of mangrove management. The results revealed a total increase of 2094 ha in mangrove area, with approximately 65.2% of mangroves currently included in the ERP zoning plan. Compared to the Non-Redline zone, the mangrove increment under ERP was higher (1365.55 ha) but with a lower growth rate (20.7%). Conversely, the Non-Redline zone exhibited an increment of 729.32 ha with a growth rate of 38.3%. Furthermore, around 80.0% of carbon storage in mangroves was managed within ERP zones, where the biomass and carbon per unit were at least twice as high as those in the Non-Redline zone. The study suggested that the prevailing ERP planning in China could substantially enhance the function of blue carbon sequestration in mangroves. However, it was evident that the current ERP does not fully meet strategic needs, and it also highlighted the need for optimized planning to minimize tradeoffs between environmental quality and development. © 2024, The Authors. All rights reserved.

关键词： Digital storage

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The Significant Influence of Pre-Oxidation with Potassium Permanganate on Coagulation of Humic Acid and its Membrane Fouling Behavior

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SSRN 2023年

作者： Yang, Min Li, Kun Wang, Tianyu Liu, Ruiping Hu, Chengzhi Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China University of Chinese Academy of Sciences Beijing100049 China

In this study, we systematically explore coagulation behavior, ultrafiltration membrane fouling behavior and the mechanism involved in for weak acid, neutral and alkaline condition, respectively, during the process of pre-oxidation of potassium permanganate and coagulation of aluminum chloride to remove humic acid (HA). The KMnO4 pre-oxidation significantly enhances flocs formation, and the flocs size increases from 82 to 122μm at pH 5.5, from 63 to 185μm at pH 7.0 and from 0 to 75μm at pH 8.5, respectively. Pre-oxidation could efficiently convert macromolecule HA to small molecule, and HA between 3kDa and 30kDa has the fastest reaction rate with KMnO4, then comes HA over 30kDa, and the HA under 3kDa has the slowest reaction rate. The enhanced coagulation at pH 5.5 is attributed to the aluminum speciation change after pre-oxidation along with the generated Mn2+ damaging the electric double layer structure. And for pH 8.5 it is mainly caused by the in-situ MnO2 as combination nuclei during pre-oxidation. Besides, for pH 7.0, the combined effect of in-situ MnO2 and aluminum speciation change both contribute to improvement of the coagulation. What’s more, the enhanced Al coagulation by pre-oxidation of KMnO4 also helps alleviate the membrane fouling, and a much rougher surface with larger flocs forms after KMnO4-aided Al coagulation humic acid filtration. This study provides an alternative perspective on the mechanism of pre-oxidation coagulation process. © 2023, The Authors. All rights reserved.

关键词： Coagulation

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Waste food reduction as a way to reduce resources and energy consumption in the Italian industrial sector: An IO-LCA analysis

Waste food reduction as a way to reduce resources and energy...

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2020 Applied Energy Symposium (ICAE), 100RES 2020

作者： Bartocci, Pietro Yang, Qing Zhou, Hewen Chen, Bin Fantozzi, Francesco Department of Engineering University of Perugia Perugia Italy China-EU Institute for Clean and Renewable Energy Huazhong University of Science and Technology Wuhan China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China

Food production involves both agricultural and industrial activities which consume several resources among which: water, energy, land, minerals and chemicals. The efficiency in the use of the resources depends on the type of food which is produced and the adopted processes. In any case if food is discarded or lost at any step of the supply chain this represents a waste of energy and resources. For this reason, the LIFE project irexfo, coordinated by the University of Perugia has proposed a way to promote a business model aiming at both: the reduction of food losses and also the reuse of the not comestible food waste in biogas plants. The model has been tested in Umbria as a pilot region and in this study the results obtained are scaled up to a national level and applied to the Italian IO database reported in the EXIOBASE, to evaluate which could be the benefits of the application of the irexfo business model to the whole Italian agroindustry sector and also the interrelations between this sector and the Italian energy sector. The analysis is performed using SimaPro software 9.0, results are compared with those of similar studies which have been performed at European level. This is the first study of this kind focused on Italy. © The Authors, published by EDP Sciences, 2021.

关键词： Supply chains

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Enhancing Chlorella Vulgaris Growth with Fe-Loaded Sulphoaluminate Cement: A Promising Phosphorus Adsorbent Reutilization Strategy

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SSRN 2023年

作者： Lian, Faqin Fu, Qionglin Miao, Shiyu Zhang, Yanyu Wang, Ying Wang, Junfeng Lan, Huachun Liu, Huijuan Qu, Jiuhui Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control SchoolofEnvironment Tsinghua University Beijing100084 China State Key Laboratory of Marine Resources Utilization South China Sea Hainan University Haikou570228 China College ofFisheries andLife Science Hainan TropicalOcean University Sanya572000 China

The irreversible adsorption represented by cement-based adsorbents is difficult to regenerate. To address this issue, a novel disposal strategy with low environmental pollution and economic costs, namely, cement-based marine reefs was developed. The performance of FSC-P (Fe-loaded sulphoaluminate cement adsorbed phosphorus, FSC-P) was assessed including the phosphorus source supplied by FSC-P, cellular composition, pigment content, membrane integrity, and antioxidant system of marine Chlorella vulgaris. Physiological feedback of C. vulgaris showed that FSC-P effectively reduces oxidative stress, enhances cell membrane integrity, and promotes the accumulation of essential cellular components in algae. The phosphorus and calcium source of FSC-P came from Ca2P2O7 and Ca4Al6O12SO4 (ye’elimite) under alkaline conditions. Meanwhile, FSC-P has the characteristics of slow release, and phosphorus can be extracted over 16 days. By directly applying FSC-P to marine environments without requiring pretreatment, our approach offers a practical and sustainable solution, bridging the gap between environmental conservation and resource utilization. © 2023, The Authors. All rights reserved.

关键词： Cytology

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Highly Efficient and Selective Extraction of Phosphorous from Wastewater as Vivianite in a Strategically Operated Four-Chamber Flow Electrode Capacitive Deionization

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SSRN 2022年

作者： Liang, Peng He, Yunfei Zhang, Xiaori Zuo, Kuichang Yang, Fan Gao, Tie State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China The Key Laboratory of Water and Sediment Sciences Ministry of Education College of Environment Sciences and Engineering Peking University Beijing100871 China

Phosphorus (P) is not only one of the main contaminants in wastewater but also an essential nutrient for all living organisms. In this study, we demonstrate a highly efficient and selective process for extraction of P from wastewater in the form of solid vivianite using a strategically operated four-chamber flow electrode capacitive deionization (FC-FCDI). The separated diluate and concentrate chambers in FC-FCDI enables continuous production of dephosphorylated water and P-rich brine, realizing P removal rate (0.22 μmol/(cm2 ·min)) and enrichment efficiency (concentration factor of 17.2) much higher than previous studies. The spontaneously enriched competing ions in the concentrate mitigate their further migration due to concentration countering effect, realizing to date the highest selectivity for P over SO42- (4.4) in CDI systems. Most importantly, the precipitated vivianite has high P content (12.4%) and much smaller volume compared with the P-recovered solution in previous studies. The recovery of P in the solid state prevents the production of brine wastes, requires no water input for concentrate replenishment, and is conducive to transport, storage, and direct usage for various purposes. This work suggests a novel method for highly selective and efficient extraction of P from wastewater using tailor-designed and strategically-operated FC-FCDIs. © 2022, The Authors. All rights reserved.

关键词： Extraction

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Influence of pore size and membrane surface properties on arsenic removal by nanofiltration membranes

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Frontiers of environmental Science & Engineering 2019年第2期13卷 55-62页

作者： Nathalie Tanne Rui Xu Mingyue Zhou Pan Zhang Xiaomao Wang Xianghua Wen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Nanofiltration(NF)has a great potential in removing arsenate from contaminated *** performance including arsenate rejection,water permeability and resistance to fouling could however differ substantially among NF *** study was conducted to investigate the influence of membrane pore size and surface properties on these aspects of membrane *** fullyaromatic NF membranes with different physicochemical properties were adopted for this *** results showed that surface charge,hydrophobicity,roughness and pore size could affect water permeability and/or arsenate rejection considerably.A more negative surface charge was desirable to enhance arsenate rejection ***90 and a non-commercialized membrane(M#1)demonstrated the best performance in terms of arsenate rejection and water *** M#1 membrane showed less membrane fouling than NF90 when used for filtration of real arsenic-containing *** was mainly due to its distinct chemical composition and surface properties.A severe membrane fouling could lead to a substantial reduction of arsenic *** M#1 membrane showed the best performance,which indicated that membrane modification could indeed enhance the overall membrane performance for water treatment.

关键词： Arsenate Nanofiltration Drinking water Membrane property Membrane fouling

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Nanoconfinement boosts affinity of hydrated zirconium oxides to arsenate: Surface complexation modeling study

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Chemosphere 2024年 349卷 140912页

作者： Shen, Pengfei Pan, Siyuan Huang, Xianfeng Zhang, Xiaolin State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Nanjing University Nanjing210023 China National and Local Joint Engineering Research Center for Ecological Treatment Technology of Urban Water Pollution School of Life and Environmental Science Wenzhou University Wenzhou325035 China

Nanoscale hydrated zirconium oxide (HZO) holds great potential in groundwater purification due to its ability to form inner-sphere coordination with arsenate. Despite being frequently used, especially as encapsulations in host materials for practical application in water treatment, the adsorption mechanisms of solutes on HZO are not appropriately explored, in particular for arsenate adsorption. In this study, we investigated the Zr–As coordination configuration and identified the most credible Zr–As configuration using surface complexation modeling (SCM), XPS and FT-IR analysis. The corresponding intrinsic coordination constants (Kintr) values was calculated by SCM, and the nanoconfinement effects were distinguished by comparing bare HZO with the HZO nanoparticles (NPs) encapsulated inside the strongly basic anion exchanger D201. Potentiometric titration suggests that the surface Zirconium hydroxyl groups (≡ZrOH) mainly exist in protonated form (≡ZrOH2+). Batch adsorption experiments demonstrate that the D201 hosts could adsorb As(V) through ion exchange by the quaternary ammonium groups under the low ionic strength (≤0.01 M NaNO3) and at pH > 6. The nanocomposite (HZO@D201) exhibits a higher adsorption capacity in a wide range of pH (3-10) and ionic strength (0.001–0.1 M NaNO3) than bare HZO. SCM simulations reveal that the coordination configuration of diprotonated monodentate mononuclear (MM-H2) dominates at pH 3–6, while deprotonated bidentate binuclear (BB–H0) dominates at pH > 7. For each configuration, the intrinsic coordination constants (Kintr) of HZO@D201 (10−0.66 and 10−16.10, respectively) are significantly higher than those of bare HZO (10−12.24 and 10−44.42, respectively), indicating a superior chemical bonding affinity caused by nanoconfinement. The obtained Kintr values are used to predict arsenate adsorption isotherms in pH 3 and 9, and the results align with the SCM simulation outcomes. This study may offer a feasible method for investigating the n

关键词： Nanocomposites

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Efficient Incorporation of Highly Migratory Thallium into Struvite Structure: Unraveling the Stabilization Mechanisms from a Mineralogical Perspective

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SSRN 2024年

作者： Wang, Chao Jiang, Ting Huang, Junwei Chen, Min Hu, Huimin Peng, Lei Zeng, Chaocheng Zhang, Qiwu School of Resources and Environmental Engineering Wuhan University of Technology Wuhan430070 China State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China

The emergency treatment of thallium (Tl+) contamination in highly concentrated Tl-containing wastewater is receiving a great deal of attention. Although intensive investigations on the use of adsorption and oxidation for the treatment of Tl+ are available, further challenge exists to overcome the limitations in performance. The purpose of this work is to study the feasibility of achieving both emergency treatment of Tl-containing wastewater and the mechanism of entry of Tl+ into mineral structure directly. Struvite structure has been chosen to provide a geometric framework for Tl+ incorporation through the ionic exchange of NH4+ with Tl+, with the final exchange amount high enough to serve for the emergency disposal of wastewater. Moreover, a series of characterizations such as XRD, XPS, FTIR, SEM-EDS, and TG combined with the density functional theory (DFT) calculations were used to gain insight into the mechanism of Tl+ immobilization or release in or out of struvite structure. The confirmed excellent incorporation performances both for the simulation of thallium-containing wastewater and for the disposal of actual wastewater indicated the reasonability of applying mineralogy for environmental remediation. © 2024, The Authors. All rights reserved.

关键词： Ion exchange

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