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Science China Chemistry 2010年第3期53卷 663-669页

作者： Cao, Bai Chuan Gao, Bao Yu Yue, Qin Yan Fu, Ying Xu, Chun Hua shandong key laboratory of water pollution control and resource reuse School of Environmental Science and Engineering Shandong University Jinan 250100 China School of Civil and Architecture Jinan University Jinan 250022 China

Two inorganic polymer coagulants,polyferric silicate sulphate(PFSS) and polyferric sulphate(PFS),were comparatively evaluated in the Yellow River water treatment.The removal efficiency of turbidity and UV254 were investigated,and the zeta potential was measured.An online laser scatter instrument was used to determine the size distribution of flocs formed in the coagulation processes.Compared with PFS,PFSS forms flocs with higher growth rates and larger sizes.The formed flocs were exposed to a series of shear forces,and the floc strength was measured from the relationship between the applied shear speed and the resulting floc size.The flocs formed by PFSS had a higher strength.The floc breakage(expressed as breakage factor,Bf) and re-growth ability(expressed as breakage factor,Rf) under different shear forces and different shear periods were investigated,and it was found that larger Bf and Rf appeared after exposure to stronger shear force and longer shear period.Under the same shear condition,the flocs formed by PFSS showed a larger Bf while the flocs formed by PFS had better re-growth ability.

关键词： ferric based inorganic polymer coagulants the Yellow River water floc growth floc strength floc breakage and re-growth

OPTIMIZED DESIGN OF NATURAL ECOLOGICAL WASTEwater TREATMENT SYSTEM BASED ON water ENVIRONMENT MODEL OF DYNAMIC MESH TECHNIQUE

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Journal of Hydrodynamics 2010年第1期22卷 1-8页

作者： XU Zu-xin WEI Zhong YIN Hai-long HUANG Li-hui State key laboratory of pollution control and resource reuse Tongji University Shanghai 200092 China College of Environmental Science and Engineering Shandong University Jinan 250100 China

A Natural Ecological Wastewater Treatment System （NEWTS） is usually built on natural terrain with necessary topography modification to improve water flowing route and pattern, and then the topography modified NEWTS should also have a reasonable water storage volume and hydraulic retention time so as to achieve the anticipated water purification effect. In this study, the dynamic mesh technique based on the finite element method and element storativity coefficients was presented to develop a two-dimensional hydrodynamic and water quality model, which was used to optimize the design of NEWTS under the dynamic land-water boundary due to various water storage volume. The models were employed in the optimized design of NEWTS from a large abandoned coal mine, which purifies the polluted water flowing into a large water storage lake, as part of the East Route South-to-North water Transfer Project in China. Specifically, the natural topography modification scheme was presented, and further, a reasonable water storage volume and hydraulic residence time was obtained, based on the reasonable estimation of roughness coefficient and pollutant removal rate of the NEWTS with phragmites communis.

关键词： ecological wastewater treatment dynamic mesh hydrodynamic model water quality model abandoned coal mine

Sn-doped induced stable 1T-WSe_(2)nanosheets entrenched on N-doped carbon with extraordinary half/full sodium/potassium storage performance

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Rare Metals 2023年第5期42卷 1557-1569页

作者： Yan-Ru Liu Ze-Wei Lei Ren-Ping Liu Xin-Ye Li Pei-Xun Xiong Yong-Jin Luo Qing-Hua Chen Ming-Deng Wei Ling-Xing Zeng Qing-Rong Qian College of Life Science Fujian Normal UniversityFuzhou350007China Engineering Research Center of Polymer Green Recycling of Ministry of Education College of Environment and ResourcesCollege of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhou350007China Fujian key laboratory of pollution control and resource reuse Fuzhou350007China Fujian provincial key laboratory of Electrochemical Energy Storage Materials Fuzhou UniversityFuzhou350002China key laboratory of Advanced Energy Materials Chemistry Ministry of EducationCollege of ChemistryNankai UniversityTianjin300071China

At present,there have been some reports on the application of metal phase selenide(1T-MSe_(2))in the field of energy storage.In this manuscript,a stable Sn-doped metal phase tungsten selenide(1T-WSe_(2)-Sn)was elaborately fabricated in situ by a simple calcination technique.N-doping was introduced by employing chitosan as precursor and nanoreactor,the Sn-doping induces 1T phase of WSe_(2)and enlarges the layer space to promote the electron/ion transport and structural stability.The optimized 1T-WSe_(2)-Sn electrode delivers prominent cycling lifespan(285 mAh·g^(-1)at 1.0 A·g^(-1)after 900 cycles)along with decent rate capability when applied as an anode of sodium ion batteries(SIBs).The specific capacity was determined to be of 460 mAh·g^(-1)at 0.1 A·g^(-1)after 100cycles.It also displays superior capacity of 183 mAh·g^(-1)at0.5 A·g^(-1)for 200 cycles when paired with Na_(3)V_(2)(PO_(4))_(3)cathode.Applied as the anode for potassium ion batteries(PIBs),it exhibits a satisfactory specific capacity of 345mAh·g^(-1)at 0.1 A·g^(-1)after 50 cycles.

关键词： WSe_(2) Sn-doped Metal phase Sodium/potassium storage

Epidemic transition of environmental health risk during China's urbanization

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Science Bulletin 2017年第2期62卷 92-98页

作者： Miaomiao Liu Xingyu Liu Yining Huang Zongwei Ma Jun Bi State key laboratory of pollution control and resource reuse School of the Environment Nanjing University Nanjing 210023 China School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210023 China

China has experienced rapid urbanization in recent decades along with dramatic economic growth.Previous studies have shown that urbanization has both positive and negative effects on health.However, there is a lack of research on the overall effects of urbanization on the epidemic transition of environmental health risks considering various pathways in China. In the present study, we studied the contributions of different aspects of urbanization in China to epidemic transitions using provincial and multi-year(1995, 2000, 2005, and 2010) panel data. Statistical models with fixed and random effects were developed to explore the impacts of different urbanization indicators on the overall epidemic transition of environmental health(general model) and the changes in cause-specific mortality rates of typical diseases(cause-specific models). The results show that the impacts of non-communicable diseases continue to grow during the urbanization process in China. The ratio of communicable disease-related mortality to non-communicable disease-related mortality continues to decrease over time. The general model shows that the improved medical conditions(coefficient = 0.0011, P = 0.037), the improved urban infrastructure(e.g., tap water supply)(coefficient = 0.00065, P < 0.001), and the rise in income(coefficient = 0.00027, P = 0.047) during the urbanization process are important factors that promote this overall epidemic transition. The cause-specific models show that the mechanisms behind the general model are complicated. More attention should be paid to non-communicable diseases in urban health management. Specific health policies for different diseases should incorporate the considerations of different impact pathways of urbanization.

关键词：城市化过程环境卫生健康风险中国非传染性疾病城市化进程统计模型变迁

Layer by Layer Assembly of Poly(Allylamine Hydrochloride)/Phosphate Ions and Poly(Sodium 4-Styrene Sulfonate) Membrane for Forward Osmosis Application

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Journal of Ocean University of China 2019年第3期18卷 743-749页

作者： ZHOU Wen YU Li LI Yiming GAO Baoyu WANG Zhining key laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao 266100 China shandong key laboratory of water pollution control and resource reuse School of Environmental Science and Engineering Shandong University Jinan 250100 China

Based on the layer by layer(Lb L)assembly technology,the nano-scale composite membrane with excellent structure can be prepared by changing the polyelectrolyte and controlling the deposition conditions.Polyamines and phosphate ions(Pi)can be self-organized to form supramolecular systems which could be exploited to stabilize the interfacial architecture.The LbL membrane was made of the positively charged poly(allylamine hydrochloride)(PAH)self-organized with Pi and the negatively charged poly(sodium 4-styrene sulfonate)(PSS)alternatively on top of a poly(acrylonitrile)(PAN)substrate.Compared to the membrane without Pi,the membrane assembled by PAH/Pi improved forward of flux and reduced flux of salt.The concentration of PAH and PSS,deposition time,pH and number of layers showed significant influences on the performance of the membrane.In this experiment,we systematically investigated the preparation conditions and under the optimized conditions the prepared membrane exhibited high water fluxes of 13.5 L m^-2 h^-1 with corresponding salt to water flux,Js/Jv,ratio of 0.07 g L^-1 tested by forward osmosis when DI water as feed solution and 2 mol L^-1 MgCl2 as draw solution.

关键词： forward osmosis layer by layer(LbL) polyelectrolyte phosphate ions

Polytitanium sulfate(PTS):Coagulation application and Ti species detection

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Journal of Environmental Sciences 2017年第2期29卷 250-258页

作者： Yanxia Zhao Sherub Phuntsho Baoyu Gao Hokyong Shon shandong key laboratory of water pollution control and resource reuse School of Environmental Science and EngineeringShandong UniversityJinan 250100China Centre for Technology in water and Wastewater School of Civil and Environmental EngineeringUniversity of TechnologySydneyBroadwayNSW 2007Australia key laboratory for Special Functional Aggregated Materials of Education Ministry School of Chemistry and Chemical EngineeringShanclong UniversityJinan 250100China

Interest in the development of inorganic polymerized coagulants is growing; however, there are only limited studies on the synthesis of polytitanium coagulants, which are expected to exhibit improved coagulation efficiency with better floc properties. This study presents the synthesis of polytitanium sulfate（PTS） for potential application in water purification,followed by characterization of PTS flocs and titanium species detection. Stable PTS solutions were successfully synthesized and standard jar tests were conducted to evaluate their coagulation efficiency. Electrospray ionization time-of-flight mass spectrometry（ESI-TOF-MS） speciation analysis revealed that a variety of mononuclear and polynuclear complexes were formed in PTS solution, indicating the polymeric nature of the synthesized coagulant. Floc characteristics were studied through on-line monitoring of floc size using a laser diffraction particle size analyzer. Results showed that PTS had a comparable or in some cases even higher organic matter and particulate removal efficiency than Ti（SO4）2.The effluent p H after PTS coagulation significantly improved toward desirable values closer to neutral p H. Properties of flocs formed by PTS were significantly improved in terms of floc size, growth rate and structure. This study showed that PTS could be an efficient and promising coagulant for water purification, with the additional benefit that its coagulated sludge can be used to recover valuable TiO2 nanoparticles for various commercial applications.

关键词： Polytitanium sulfate Coagulation and flocculation Titanium species Floc properties

Review on corrosion and corrosion scale formation upon unlined cast iron pipes in drinking water distribution systems

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Journal of Environmental Sciences 2022年第7期34卷 173-189页

作者： Haiya Zhang Dibo Liu Lvtong Zhao Jun Wang Shuguang Xie Shuming Liu Pengfei Lin Xiaojian Zhang Chao Chen State key Joint laboratory of Environmental Simulation and pollution control School of EnvironmentTsinghua UniversityBeijing 100084China State key Joint laboratory of Environmental Simulation and pollution control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China State key laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

The qualified finished water from water treatment plants(WTPs) may become discolored and deteriorated during transportation in drinking water distribution systems(DWDSs), which affected tap water quality seriously. This water stability problem often occurs due to pipe corrosion and the destabilization of corrosion scales. This paper provides a comprehensive review of pipe corrosion in DWDSs, including corrosion process, corrosion scale formation, influencing factors and monitoring technologies utilized in DWDSs. In terms of corrosion process, corrosion occurrence, development mechanisms, currently applied assays, and indices used to determine the corrosion possibility are summarized, as well as the chemical and bacterial influences. In terms of scale formation, explanations for the nature of corrosion and scale formation mechanisms are discussed and its typical multilayered structure is illustrated. Furthermore, the influences of water quality and microbial activity on scale transformation are comprehensively discussed. Corrosion-related bacteria at the genus level and their associated corrosion mechanism are also summarized. This review helps deepen the current understanding of pipe corrosion and scale formation in DWDSs, providing guidance for water supply utilities to ensure effective measures to maintain water quality stability and guarantee drinking water safety.

关键词： Corrosion Scale formation water quality stability Drinking water distribution system Iron pipe water supply safety

Preparation and characterization of β-FeOOH-coated sand and its adsorption of Cr（VI） from aqueous solutions

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Frontiers of Environmental Science & Engineering 2012年第4期6卷 455-462页

作者： Chunhua XU Dandan CHENG Baoyu GAO Zhilei YIN Qinyan YUE Xian ZHAO shandong key laboratory of water pollution control and resource reuse School of Environmental Science and EngineeringShandong UniversityJinan 250100China State key laboratory of Crystal Materials Shandong UniversityJinan 250100China School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China

Batch adsorption experiments were conducted to explore the adsorption of Cr（VI） in aqueous solutions by fl-FeOOH-coated sand. We investigated the key factors which affected the adsorption process such as adsorbent dosage, initial pH, initial Cr（VI） ion concentration, contact time and temperature. The uptake of Cr（VI） was very rapid and 44.3%, 51.6%, 58.9% of the adsorption happened during the first 180minutes at 293K, 303K and 313K, respectively. The pseudo-second-order rate equation successfully described the adsorption kinetics. To study the adsorption isotherm, two equilibrium models, the Langmuir and Freundlich isotherms, were adopted. At 293K, 303K and 313K, the adsorption capacities obtained from the Langmuir isotherm were 0.060, 0.070 and 0.076 mg Cr（VI） per gram of the adsorbent, respectively. Thermodynamic parameters such as the change of energy, enthalpy and entropy were calculated using the equilibrium constants. The negative value of AGO and the positive value of △H^0 showed that the adsorption of Cr（VI） in aqueous solutions by β-FeOOH-coated sand was spontaneous, endothermic and occurred by physisorption.

关键词： β-FeOOH-coated sand Cr（VI） adsorption isotherm kinetics

Reproductive toxicity of organic extracts from petrochemical plant effluents discharged to the Yangtze River,China

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Journal of Environmental Sciences 2010年第2期22卷 297-303页

作者： Xiaoyi Wang Wei Shi Jiang Wu Yingqun Hao Guanjiu Hu Hongling Liu Xiaodong Han Hongxia Yu The State key laboratory of pollution control and resource reuse School of the Environment Nanjing University Nanjing 210093 China. Immunology and Reproductive Biology laboratory Medical School Nanjing University Nanjing 210093 China State Environmental Protection key laboratory of Monitoring and Analysis for Organic Pollutants in Surface water Jiangsu Provincial Environmental Monitoring Center Nanjing 210036 China

water pollution of the Yangtze River in China became one of challenges that the government is facing today. Increasing numbers of petrochemical plants were built along the river in past decades, and numbers of organic chemicals were discharged into the river. Our goal was to establish in vitro system on rat sertoli cells, spermatogenic cells and leydig cells to investigate the reproductive toxicity potential induced by organic extracts from petrochemical effluents. Our results showed that the organic extract depressed the viability （p 〈 0.01） and destroyed the plasma membrane integrity of sertoli cells and spermatogenic cells to a certain degree. Accordingly, proportion of early apoptotic sertoli cells and late apoptotic spermatogenic cells increased significantly. Although significant morphological changes were not detected for leydig cells, the extract was observed to inhibit their testosterone production （p 〈 0.01）. Sertoli cells and sperrnatogenic cells appeared to be more sensitive and maybe the main targets of the key toxins. These results suggested that the in vitro system on rat testicular cells may be useful to predicate reproductive toxicity potential of organic extracts from petrochemical effluents. More attention should be paid to the petrochemical effluents, because long-term accumulation of these organic compounds in organisms may cause spermatogenesis malfunction and testosterone reduction.

关键词： wastewater in vitro system sertoli cells spermatogenic ceils leydig cells

Effects of pH on coagulation behavior and floc properties in Yellow River water treatment using ferric based coagulants

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Chinese Science Bulletin 2010年第14期55卷 1382-1387页

作者： CAO BaiChuan GAO BaoYu XU ChunHual, FU Ying LIU Xin shandong key laboratory of water pollution control and resource reuse School of Environmental Science and Engineering Shandong Uni- versity Jinan 250100 China School of Civil and Architecture Jinan University Jinan 250022 China

Enhanced coagulation is one of the major methods to control disinfection by-products (DBPs) in water treatment process. Coagulation pH is an important factor that affects the enhanced coagulation. Recently, many studies focus on the coagulation effects and mechanisms, and few researchers studied the properties of flocs formed under different coagulation pH. Two inorganic polymer coagulants, polyferric silicate sulphate (PFSS) and polyferric sulphate (PFS), were used in Yellow River water treatment. The influence of pH on coagulation effect was investigated under the optimum dosage, and the results show that both coagulants gave excellent organism removal efficiency when pH was 5.50. According to the variation of zeta potential in coagulation process, coagulation mechanisms of the coagulants were analyzed. An on-line laser scatter instrument was used to record the development of floc sizes during the coagulation period. For PFSS, pH exerted great influence on floc growth rates but little influence on formed floc sizes. In PFS coagulation process, when pH was 4.00, PFS flocs did not reach the steady-state during the whole co-agulation period, while little difference was observed in floc formation when pH was 5.50 and above. The preformed flocs were exposed to strong shear force, and the variation of floc sizes was determined to evaluate the influence of pH on floc strength and re-growth capability. In comparison of the two coagulants, PFS flocs had higher floc strength and better recovery capability when pH was 4.00, while PFSS flocs had higher floc strength but weaker recovery capability when pH was 5.50 and above.

关键词：絮凝性能 pH值混凝剂水处理铁基黄河行为凝血