检索结果-内蒙古大学图书馆

Comparison of bipolar membrane electrodialysis, electrodialysis metathesis, and bipolar membrane electrodialysis metathesis for the conversion of waste Na2SO4: Process performance and economic analysis

SSRN

引用

SSRN 2024年

作者： Zhu, Ming He, Feiyu Feng, Ling Chi, Yongzhi Li, Yu-You Tian, Binghui State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences University of Chinese Academy of Sciences Chinese Academy of Science Beijing100085 China Department of Frontier Science for Advanced Environment Graduate School of Environmental Sciences Tohoku University 6-6-20Aoba Aramaki-Aza Aoba-Ku Sendai Miyagi980-8579 Japan Tianjin Key Laboratory of Water Quality Science and Technology School of Environmental and Municipal Engineering Tianjin Chengjian University Tianjin300384 China

To convert Na2SO4 into other high-value products (NaOH, H2SO4, and (NH4)2SO4), three types of cell configurations of electrodialysis were applied (three compartments bipolar membrane electrodialysis (BMED), four compartments electrodialysis metathesis (EDM) and five compartments bipolar membrane electrodialysis metathesis (BMED-5)) and parameters such as the average voltage variation, desalination rate, product concentration, conversion rate, ion flux and energy consumption were calculated and compared. The experimental results and calculations indicated that the overall performance of BMED-5 was inferior to that of BMED and EDM. An industrial model was established, indicating that the net profit of converting Na2SO4 using BMED-5 was always higher than that of BMED and EDM. Based on the advantages of low investment cost (132 $) and low energy cost (152 $/t Na2SO4), EDM was applicable to factories with a low output of Na2SO4 (production capacity 2SO4) and BMED-5 (227.6 $/t Na2SO4) were applicable to those with a high output of Na2SO4 (production capacity > 45%) based on high net profits. © 2024, The Authors. All rights reserved.

关键词： Electrodialysis

来源：评论

学校读者我要写书评

暂无评论

Develop a Multi-Objective Fast Optimization Framework on Improving Building Energy Efficiency And Indoor environmental Quality For University Library Atrium

SSRN

引用

SSRN 2024年

作者： Xu, Shen Chen, Yongzhong Liu, Jianlin Guan, Jun Gao, JinFeng Qin, Yuchen Tan, Wenjun Li, Gaomei School of Architecture and Urban Planning Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Subtropical Building and Urban Science Guangzhou510641 China Hubei Engineering and Technology Research Center of Urbanization Wuhan430074 China College of Environmental Science and Engineering Donghua University Shanghai201620 China School of Energy and Power Engineering Nanjing University of Science & Technology Nanjing210094 China Tianjin Key Laboratory of Smart City Planning Tianjin Urban Planning and Design Institute Co. Ltd Tianjin300190 China

Multi-objective optimization methods provide a valid support to performance-based design of buildings. However, building performance simulation with low efficiency is a significant barrier to the performance-driven building design. The aim of this paper is to develop a fast framework of multi-objective optimization coupled with machine learning algorithms, taking the university library atrium as an example. This paper extracted the prototypical form of university library atrium based on 44 library cases in Wuhan;Then a methodology verified with measured data for evaluating building performance was constructed, and the synergistic influence of spatial morphology parameters on the building energy efficiency(BEE) and indoor environmental quality(IEQ) was analyzed;Finally, a multi-objective fast optimization framework coupled with machine learning algorithms was used to achieve the optimal design of university library atrium. The results showed that the parameters that influence the building energy consumption, indoor thermal comfort, daylighting performance most were the Height-to-Width ratio (HWR), the skylight solar heat gain coefficient (SHGCs), and the sidewall window-to-wall ratio (SWWR), respectively, when considering the synergistic impact of atrium spatial morphological parameter. The machine learning models predicted performance 400 times faster than traditional performance simulations. And compared with the worst-performance scheme, the maximum optimization rate of building energy consumption, indoor thermal comfort, daylighting performance was 29.46%, 10.46%, and 65.56%, respectively. The multi-objective fast optimization framework could provide guidance for policy makers and architects to performance-based design in the early design stages of university library atrium and support a low-carbon, energy-efficient, healthy and comfortable campus environment. © 2024, The Authors. All rights reserved.

关键词： Multiobjective optimization

来源：评论

学校读者我要写书评

暂无评论

In Situ Generation of Cl*/Clo* Species for Efficiently Degrading Chlorophenol on the Surface of Oxygen Vacancy-Rich Zn2coox Nanoparticles Via Single Electron Transfer Path

SSRN

引用

SSRN 2023年

作者： He, Liang Ma, Yingying Lei, Xin Zhou, Huajing Yuan, Yuan Du, Wentao Liu, Zilian Miao, Rongrong Guan, Qingqing Faculty of Chemical Engineering Kunming University of Science and Technology Yunnan Kunming650500 China Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control Faculty of Environmental Science & Engineering Kunming University of Science & Technology Kunming650500 China Faculty of Civil Engineering and Mechanics Kunming University of Science and Technology Yunnan Kunming650500 China Key Laboratory of Oil and Gas Fine chemicals of Ministry of Education college of Chemical Engineering Xinjiang University Urumqi830017 China

Improving the efficiency of electron utilization is a key in the field of electrocatalytic degradation of pollutants. The key is to break the indirect electron utilization of H2O2 produced by two-electron pathway in the traditional ORR process. Hence, we constructed a cheap catalyst ZnzCoyOx with different oxygen vacancy concentrations to realize the transformation of electron utilization path of in-situ activated Cl‐. The results show that the oxygen vacancy concentration increases gradually with the lattice distortion. Among them, Zn2CoOx with oxygen vacancy concentration of 2.27 exhibits remarkably low charge/mass transfer resistance (65Ω) and Tafel slope (35.71 mV dec-1). Moreover, it has realized a transition from four/two-electron to single-electron utilization pathway with electron transfer number of 1.18. The identification of active species indicated that this pathway is an efficient single-electron utilization pathway of the unconventional '1+1' synergistic pattern of ORR ([[EQUATION]]) and RCS ([[EQUATION]] and [[EQUATION]], the maximum electrocatalytic activity of 4.601 mC·cm-2). Electrocatalytic experiments show that the Zn2CoOx modified electrode also possesses excellent corrosion resistance and cleaning properties, which can achieve the overall reduction of toxicity of chlorine-containing wastewater. In conclusion, the formation rate of OV* co-induced by lattice oxygen-defect can determine a better reaction path for ROS and RCS, breaking through the electron utilization barrier of the traditional two-electron ORR pathway, and providing a new solution for the efficient operation of the electrooxidation process of chlorine-containing organic wastewater. © 2023, The Authors. All rights reserved.

关键词： Oxygen vacancies

来源：评论

学校读者我要写书评

暂无评论

Serum Organophosphate Flame Retardants and Plasticizers in Chinese Females of Childbearing Age: Association with Serum Reproductive and Thyroid Hormones

SSRN

引用

SSRN 2023年

作者： Yao, Yiming Liu, Yarui Li, Yongcheng Xiao, Nan Liu, Min Wang, Yu Luo, Haining Li, Yunfei Wang, Shuo Feng, Yujie College of Environmental Science and Engineering Nankai University Tianjin China School of Environmental Science and Engineering Academy of Environment and Ecology Tianjin University Tianjin China MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and Engineering Nankai University Tianjin China Department of Center for Reproductive Medicine Tianjin Central Hospital of Gynecology Obstetrics Tianjin Key Laboratory of Human Development and Reproductive Regulation Tianjin China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin China Tianjin Key Laboratory of Food Science and Health School of Medicine Nankai University Tianjin China Tianjin University China MOE Key Laboratory of Pollution Processes and Environmental Criteria China

Organophosphate flame retardants (OPFRs) are extensively used as flame retardants and plasticizers and have drawn concern due to their endocrine disruptive potentials. However, the impacts of OPFR exposure on reproductive and thyroid hormones have not been well clarified for females. In this study, serum concentrations of OPFRs were investigated, and levels of reproductive and thyroid hormones, including follicle-stimulating hormone (FSH), luteinizing hormone, estradiol, anti-Müllerian hormone, prolactin (PRL), testosterone (T), and thyroid stimulating hormone, were analyzed in childbearing-age females from Tianjin, a coastal city in China (n=319). Tris(2-chloroethyl) phosphate (TCEP) was the predominant OPFR and the median concentration was 0.33 ng/mL with a detection frequency of 96.6%. In the whole population, tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) and tris(2-chloroisopropyl) phosphate (TCIPP) were positively associated with T (p30, p © 2023, The Authors. All rights reserved.

关键词： Hormones

来源：评论

学校读者我要写书评

暂无评论

Efficient treatment of old landfill leachate by peroxodisulfate assisted electro-oxidation and electro-coagulation combined system

引用

Chemosphere 2024年 346卷 140675页

作者： Ma, Dingxun Wang, Dongliang Wang, Xiaohe Wang, Qiuwei Hu, Yuanliang Hubei Wuhan430074 China School of Environmental Science and Engineering Hubei Key Laboratory of Mine Environmental Pollution Control &Remediation Hubei Polytechnic University Hubei Huangshi435002 China Nankong Environmental Energy Technology Research Institute Co. Ltd Hubei Qianjiang433100 China College of Life Sciences Hubei Normal University Huangshi435003 China

Efficient removal of chemical oxygen demand (COD) and ammonium-N (NH4+-N) is the key issue for treatment of old landfill leachate. In this study, a peroxodisulfate assisted electro-oxidation and electro-coagulation coupled system (POCS) adopting Ti/SnO2–Sb2O3/TiO2 and Fe dual-anode was constructed for synergistic removal of COD and NH4+-N in old landfill leachate. laboratory experiment results showed that with current density of 20 mA cm−2, initial pH value of 8.0 and peroxodisulfate (PDS) concentration of 60 mM, the POCS system can reach removal efficiencies of 84.2% for COD and 39.8% for NH4+-N. The POCS effectively reduced the complexity of macromolecular organics and avoided the need to add acid or base to adjust pH value. The residual NH4+-N could be effectively recovered through struvite precipitation with a 93.8% purity of the precipitate. © 2023 Elsevier Ltd

关键词： Chemical oxygen demand

来源：评论

学校读者我要写书评

暂无评论

Nanoplastics enhanced the developmental toxicity of aromatic disinfection byproducts to a marine polychaete at non-feeding early life stage

引用

Chemosphere 2024年 364卷 143062页

作者： Yang, Yun Zhang, Xiangru Han, Jiarui Li, Wanxin Chang, Xinyi He, Yuhe Yee Leung, Kenneth Mei Department of Civil and Environmental Engineering Hong Kong University of Science and Technology Hong Kong SAR China Department of Health and Environmental Sciences Xi'an Jiaotong-Liverpool University Suzhou China State Key Laboratory of Marine Pollution and Department of Chemistry City University of Hong Kong Hong Kong SAR China

Micro/nanoplastics can act as vectors for organic pollutants and enhance their toxicity, which has been attributed to the ingestion by organisms and the "Trojan horse effect". In this study, we disclosed a non-ingestion pathway for the toxicity enhancement effect of nanoplastics. Initially, the combined toxicity of polystyrene microplastics (40 μm) or nanoplastics (50 nm) with three disinfection byproducts (DBPs) to a marine polychaete, Platynereis dumerilii, was investigated. No toxic effect was observed for the micro/nanoplastics alone. The microplastics showed no effect on the toxicity of the three DBPs, whereas the nanoplastics significantly enhanced the toxicity of two aromatic DBPs when the polychaete was in its non-feeding early life stage throughout the exposure period. The microplastics showed no interaction with the P. dumerilii embryos, whereas the nanoplastics agglomerated strongly on the embryonic chorion and fully encapsulated the embryos. This could contribute to higher actual exposure concentrations in the microenvironment around the embryos, as the concentrations of the two aromatic DBPs on the nanoplastics were 1200 and 120 times higher than those in bulk solution. Our findings highlight an important and previously overlooked mechanism by which nanoplastics and organic pollutants, such as DBPs, pose a higher risk to marine species at their vulnerable early life stages. This study may contribute to a broader understanding of the environmental impacts of plastic pollution and underscore the necessity to mitigate their risks associated with DBPs. © 2024 Elsevier Ltd

关键词： Toxicity

来源：评论

学校读者我要写书评

暂无评论

Natural Bond Orbital Analysis Of Atomic Orbital Hybridization During Reaction C + 4h → Ch4

SSRN

引用

SSRN 2024年

作者： Dong, Shaonan Hou, Xiaoxia Department of Forensic Science and Technology Jiangsu Provincial Engineering Laboratory for Technical and Criminal Inspection of Food Drug and Environmental Cases Jiangsu Police Institute Nanjing210031 China School of Chemistry and Chemical Engineering Key Laboratory of Mesoscopic Chemistry of MOE Nanjing University Nanjing210023 China

The hybrid orbital theory has long been used to describe the electronic configuration of CH4, but it is still unclear how the hybridization occurs. In this work, we have established a simple model for the reaction C + 4H → CH4, where four H atoms synchronously approach C atom from afar along the tetrahedral direction. The natural bond orbital (NBO) analysis along the reaction coordinate show that the reaction involves complex changes in valence orbitals and electron redistribution at several key C-H distances, which provides new insights into the hybrid orbital theory. © 2024, The Authors. All rights reserved.

关键词： Quantum chemistry

来源：评论

学校读者我要写书评

暂无评论

Nonlinear Vibration of a Loaded String in Energy Harvesting

SSRN

引用

SSRN 2024年

作者： Liu, Tao Zhao, Chaoyang Yang, Yaowen Yuan, Weifeng Key Laboratory of Testing for Manufacturing Process Ministry of Education Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province Southwest University of Science and Technology Mianyang621010 China School of Civil and Environmental Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore

The design of wideband energy harvesters using beam structures typically involves complexities, particularly in low-frequency and low-energy environments where the limitations of beam structures become more prominent. To overcome these challenges, this study proposed a strategy for energy harvesting using a loaded-string system and established a theoretical model to investigate its performance. A parametric study was conducted for the string system regarding the initial tension, mass location, material stiffness and excitation amplitude. The accuracy of proposed model was verified through experimental validation. Frequency shifting phenomenon was observed in both theoretical and experimental analysis, demonstrating the wideband characteristics of the system. Furthermore, the proposed string structure allows for convenient parameter adjustments, enabling the tuning of its natural frequency and operating bandwidth to meet more stringent practical requirements. The string system provides a new direction for the design of energy harvesters to harness the low-frequency energy from the ambient environment. © 2024, The Authors. All rights reserved.

关键词： Energy harvesting

来源：评论

学校读者我要写书评

暂无评论

An Unforeseen Long-Term Nitrate Accumulation Under Nutrient Mitigation Measures in the East Pearl River Estuary: Phenomenon, Drivers and Implications

SSRN

引用

SSRN 2023年

作者： Wang, Linlin Lei, Xiaoyu Zhou, Yang Mao, Xian-Zhong Han, Jing-Cheng Li, Bing Huang, Yuefei Zhao, Runqi Bi, Hongsheng Tang, Zhaozhao Wang, Yongqiang Li, Hailong Water Science and Environmental Engineering Research Center College of Chemical and Environmental Engineering Shenzhen University Shenzhen518060 China Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China State Key Laboratory of Hydroscience and Engineering Department of Hydraulic Engineering Tsinghua University Beijing100084 China State Key Laboratory of Plateau Ecology and Agriculture Qinghai University Xining810016 China University of Maryland Center for Environmental Science Chesapeake Bay Laboratory SolomonsMD20688 United States Changjiang River Scientific Research Institute Wuhan430010 China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China

Either NO3- or NH4+ is the dominant component of dissolved inorganic nitrogen (DIN) in most estuarine waters, but few studies have focused on the mechanisms of ongoing DIN transformations under various hydrologic regimes. In the Shenzhen Bay (SZB), a highly anthropogenic affecting bay in the east Pearl River Estuary, the dominated DIN component has been found to change from NH4+ to NO3- in recent years. Especially at the top bay, the concentration fraction of NO3- in DIN was unexpectedly promoted from 17-22% (1990-2017) to 65-66% (2018-2020), which would imply an increasing risk of red tide occurrence under current nutrient mitigation strategy. The spanning 31 years’ water quality data analysis and numerical simulations were performed to identify the roles of multiple driving factors. It was found that the contribution from decreasing runoff NH4+ input might mainly account for such change. Although NH4+ was further diluted through runoff and tidal current conditions, more NO3- was transported to the upper bay. In addition, the decreases of biochemical oxygen demand along with increasing Secchi disk depth and dissolved oxygen suggested a shrink in NH4+ production, but an improvement in nitrite oxidation process. These biogeochemical actions were well confirmed by simulations that strengthened the decrease of NH4+ and the increase of NO3-. Even without nutrient inputs from the territorial sources, the simulated biogeochemical processes still acted as decreasing NH4+ throughout the bay and increasing NO3- at the middle and lower bay. The new insights into DIN change mechanisms from the coupling biogeochemical and hydrodynamic processes would help to boost effective mitigation measures to deal with nitrate accumulation in estuarine waters for integrated land-ocean nutrient management. © 2023, The Authors. All rights reserved.

关键词： Nutrients

来源：评论

学校读者我要写书评

暂无评论

Fetal weight growth trajectories and childhood development:A population-based cohort study

引用

science Bulletin 2024年第21期69卷 3404-3414页

作者： Xinmei Chen Hongxiu Liu Aifen Zhou Feng Jin Chufeng Jing Yuanyuan Li Wei Xia Linda GKahn Ya Xie Xingliang Xiang Shuting Cao Wenxin Zhang Gaga Mahai Zhongqiang Cao Han Xiao Chao Xiong Wei Li Hanzeng Li Shunqing Xu Key Laboratory of Environment and Health Ministry of Education&Ministry of Environmental Protectionand State Key Laboratory of Environmental HealthSchool of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Wuhan Medical&Healthcare Center for Women and Children Wuhan 430015China Shunyi Women’s and Children’s Hospital of Beijing Children’s Hospital Beijing 101320China Wuxi Maternal and Child Health Hospital Wuxi 214001China Department of Pediatrics New York University Grossman School of MedicineNew York10016USA School of Environmental Science and Engineering Hainan UniversityHaikou 570208China Beijing Children’s Hospital Capital Medical UniversityBeijing 100045China

This study aimed to investigate whether fetal growth trajectories(FGTs)could predict early childhood development,indicate intrauterine metabolic changes,and explore potential optimal and suboptimal *** were developed by using an unsupervised machine-learning ***’s neurodevelopment,anthropometry,and respiratory outcomes in theﬁrst 6 years of life were assessed at different *** a subgroup of participants,we conducted a metabolomics analysis of cord blood to reveal the metabolic features of *** identiﬁed 6 FGTs:early decelerating,early decelerating with late catch-up growth,early accelerating,early accelerating with late medium growth,late decelerating,and late *** early accelerating with late medium growth pattern might be the optimal FGT due to its associations with better psychomotor development,mental development,intelligence quotient,and lung function and a lower risk of behaviour and respiratory *** with the optimal FGT,early decelerating and late decelerating FGTs were associated with poor neurodevelopment and lung function,while early accelerating FGT was associated with more severe autistic symptoms,poor lung function,and increased risks of overweight/*** alterations were enriched in amino acid metabolism for early decelerating and late decelerating FGTs,whereas altered metabolites were enriched in lipid metabolism for early accelerating ***ﬁndings suggest that FGTs are predictors of early life development and may indicate intrauterine adaptive *** discovery of optimal and suboptimal FGTs provides potential clues for the early identiﬁcation and intervention of fetal origin dysplasia or disease,but further research on related mechanisms is still needed.

关键词： Fetal growth trajectory Children development Neurodevelopment Cohort

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：