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学者姓名：张永祥
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Abstract ：
Beijing Plain is a very active part of Beijing city regarding the socio-economic and human activities of the region. Over the past four decades, Beijing's economic development and the continuous drought for nearly 10 years in the 2000s have negatively impacted the groundwater quantity and quality. Therefore, it is necessary to investigate the present situation of groundwater chemistry in this region to develop a comprehensive database and orientation for future research on groundwater quality evaluation. Mathematical statistics, Piper's trilinear diagram, Gibbs plots, the ion ratio method and PHREEQC software 3.7.3 were used to analyze the groundwater hydrogeochemical characteristics and formation mechanisms of the quaternary aquifers of the Beijing Plain area. Hydrogeochemical results indicated that the groundwater is slightly alkaline, with pH values ranging from 6.76 to 8.65 and an average value of 7.92. The order of major cations in groundwater was Ca2+ > Na+ > Mg2+ > K+ with average values of 66.54 mg/L, 50.58 mg/L, 23.78 mg/L, and 1.81 mg/L, respectively, while the order of major anions was HCO3- > SO42- > Cl- with average values of 284.89 mg/L, 52.1 mg/L and 35.5 mg/L, respectively. The groundwater chemical types are Mg-Ca-Cl-HCO3, Na-Ca-HCO3, Mg-Ca-HCO3 and Mg-Na-HCO3. Research on the main influencing factors and PHREEQC hydrogeochemical inverse simulations results along the four pathways selected confirmed that rock weathering with sulfate, silicate and carbonate rock mineral dissolution and Na+, Mg2+ and Ca2+ ion reaction exchange influenced groundwater hydrogeochemical characteristics of the quaternary aquifers of the Beijing Plain area. Understanding the formation mechanisms of hydrogeochemistry in quaternary plains provides guidance for future studies and, through suggestions and case studies, facilitates decision-making by policy-makers on the sustainable management of groundwater resources.
Keyword ：
PHREEQC PHREEQC Beijing Plain Beijing Plain quaternary aquifer quaternary aquifer groundwater quality groundwater quality hydrogeochemical characteristics hydrogeochemical characteristics
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| GB/T 7714 | Camara, Sarah Fatim , Zhou, Jinjun , Zhang, Yongxiang . Hydrochemical and Formation Mechanism Studies of Groundwater in Quaternary Aquifer in a Northern Plain of China: An Example of Beijing Plain [J]. | WATER , 2024 , 16 (14) . |
| MLA | Camara, Sarah Fatim 等. "Hydrochemical and Formation Mechanism Studies of Groundwater in Quaternary Aquifer in a Northern Plain of China: An Example of Beijing Plain" . | WATER 16 . 14 (2024) . |
| APA | Camara, Sarah Fatim , Zhou, Jinjun , Zhang, Yongxiang . Hydrochemical and Formation Mechanism Studies of Groundwater in Quaternary Aquifer in a Northern Plain of China: An Example of Beijing Plain . | WATER , 2024 , 16 (14) . |
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Abstract ：
The removal of biological phosphorus (P) removal along with chemical P removal additions is significantly important role in removing P at full-scale wastewater treatment plants (WWTPs). Few research groups have recently reported the use of P forms in these WWTPs. The current study mainly presents the varied forms of morphological phosphorus and the fate of chemical P removal agents in a full-scale WWTP that has adopted the A(2)O + MBR process. With time, the TP concentration in the liquid phase and the solid phase reaches the minimum (0.27 mg/L) and maximum values (1.75 mg/g), respectively. At this point, the TP concentration at the end of the aerobic and membrane pool becomes nearly constant. This indicates the complete removal of effluent TP from in the system. The heavy chemical P removal and addition dosing result in Al-P being the predominant P form in the solid phase. The fate of the chemical P removal and agents was determined by investigating the valences of the surface elements in freeze-dried MLSS at the membrane pool.
Keyword ：
chemical P removal addition chemical P removal addition morphological phosphorus morphological phosphorus A(2)O + MBR A(2)O + MBR operating parameters operating parameters P-fractionation P-fractionation
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| GB/T 7714 | Hu, Yongfeng , Zhang, Yongxiang , Wang, Kun et al. Variations in the morphological phosphorus in a full-scale A(2)O + MBR process with heavy chemical P removal addition dosing [J]. | WATER AND ENVIRONMENT JOURNAL , 2023 , 37 (4) : 782-791 . |
| MLA | Hu, Yongfeng et al. "Variations in the morphological phosphorus in a full-scale A(2)O + MBR process with heavy chemical P removal addition dosing" . | WATER AND ENVIRONMENT JOURNAL 37 . 4 (2023) : 782-791 . |
| APA | Hu, Yongfeng , Zhang, Yongxiang , Wang, Kun , Zhao, Chonghui , Du, Wei . Variations in the morphological phosphorus in a full-scale A(2)O + MBR process with heavy chemical P removal addition dosing . | WATER AND ENVIRONMENT JOURNAL , 2023 , 37 (4) , 782-791 . |
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Abstract ：
Chemical additions and energy costs in the wastewater industry are increasing trends in more stringent requirements for effluent quality and electricity rates. A novel ratio of chemical P removal addition to influent total phosphorus (TP) is proposed with an application to optimize operation for saving running costs. For this purpose, we monitored the performance of the process for a consecutive year (2018) and established a dynamic model related to the process. The main process variables included the concentration of influent and effluent quantity, chemical oxygen demand, biochemical oxygen demand, total nitrogen, TP, and dosing chemical additions. The ratio of the average daily effective mass of Fe (MFe-d) to the average daily mass of influent TP (TPInf-Tot-d) was found sharply rise to 3.3 g/g or higher in summer and autumn, whereas it smoothly dropped to about 2.3 g/g in winter and spring. This phenomenon can account for enhanced biological phos-phorus removal and upset. The emulating results showed that the proposed indicator can provide a relatively accurate representation of the system dynamics while significantly reducing the chemical additions and energy compared to a model that simulates the entire process without a complicated control system and algorithm.
Keyword ：
Chemical additions Chemical additions Aeration Aeration Enhanced biological phosphorus removal Enhanced biological phosphorus removal Model Model Relevance Relevance
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| GB/T 7714 | Hu, Yongfeng , Zhang, Yongxiang , Chu, Qi et al. Optimization of operating process was triggered by a saltation of ratio in a full-scale activated sludge system [J]. | DESALINATION AND WATER TREATMENT , 2023 , 281 : 163-175 . |
| MLA | Hu, Yongfeng et al. "Optimization of operating process was triggered by a saltation of ratio in a full-scale activated sludge system" . | DESALINATION AND WATER TREATMENT 281 (2023) : 163-175 . |
| APA | Hu, Yongfeng , Zhang, Yongxiang , Chu, Qi , Luo, Fan , Cao, Jinglun . Optimization of operating process was triggered by a saltation of ratio in a full-scale activated sludge system . | DESALINATION AND WATER TREATMENT , 2023 , 281 , 163-175 . |
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Abstract ：
The arbitrary distribution of groundwater monitoring sites and the redundancy of observation data restrict the ability of monitoring network to provide reliable and effective data information. The purpose of this study is aimed at finding a quantitative method to screen ideal monitoring locations and evaluate the efficiency of the monitoring network. In terms of site selection, we use hydrogeological information, monitoring density and monitoring location to select the suitable site to monitor groundwater quality, understand the temporal trends and identify the abnormal signals of pollution sources. To evaluate the efficiency of monitoring network we used the groundwater quality data for consecutive years to evaluate the groundwater monitoring network based on information entropy and principal component analysis (PCA). The results show that the optimized groundwater monitoring network is comprised of 10 monitoring wells. The efficiency evaluation results of information entropy and PCA are basically consistent. The maximum mutual information (T) and comprehensive index of monitoring site (Laiguangying) were 1.29 and 3.25 respectively, while the minimum T and comprehensive index of monitoring site (Jinzhan) were 1.05 and-0.36 respectively, and the data efficiency was low. This study provides a good example for optimizing a groundwater pollution monitoring network.
Keyword ：
Groundwater monitoring Groundwater monitoring Principal component analysis Principal component analysis Information entropy Information entropy Network optimization Network optimization
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| GB/T 7714 | Jia, Ruitao , Wu, Jin , Zhang, Yongxiang et al. Site prioritization and performance assessment of groundwater monitoring network by using information-based methodology [J]. | ENVIRONMENTAL RESEARCH , 2022 , 212 . |
| MLA | Jia, Ruitao et al. "Site prioritization and performance assessment of groundwater monitoring network by using information-based methodology" . | ENVIRONMENTAL RESEARCH 212 (2022) . |
| APA | Jia, Ruitao , Wu, Jin , Zhang, Yongxiang , Luo, Zhuoran . Site prioritization and performance assessment of groundwater monitoring network by using information-based methodology . | ENVIRONMENTAL RESEARCH , 2022 , 212 . |
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Abstract ：
Sulfidated nanoscale zero-valent iron (S-NZVI) has strong reactivity and electron selectivity and is one of the promising remediation materials in the field of ground water remediation. Due to the easy aggregation of the material, its reactivity is reduced, limiting the application in environmental remediation. In this paper, the zeta potential (zeta) of S-NZVI at different pH and the electrophoretic mobility of S-NZVI coated with sodium alginate (SA-S-NZVI) at different ionic strengths were investigated. The thickness of the polyelectrolyte layer and the surface charge of sodium alginate were also calculated by combining the soft particle theory. The polyelectrolyte layer properties were correlated with the particle dispersion to study the particle properties. The results showed that the thickness of the coating layer increased with the concentration of sodium alginate, and the settling rate and aggregation rate decreased. Thus the stability of the particles increased. Combined with the XDLVO theory, although the polyelectrolyte layer increases the surface potential of S-NZVI and improves the electrostatic repulsion, the spatial effect plays a significant role in the total repulsion energy. The smaller the particle size of SA-S-NZVI, the weaker the magnetism. Therefore, the thicker the polyelectrolyte layer, the better the stability of the particles. Finally, the change of particle size with time was predicted by the Smoluchowski aggregation model. This study has a significant effect on the sedimentation process of water treatment, the problem of filter clogging of drinking water, and the problem of aquifer blockage in the infiltration process of surface water.
Keyword ：
Soft particle Soft particle Polyelectrolyte Polyelectrolyte Nanoscale zero-valent iron Nanoscale zero-valent iron Dispersion stability Dispersion stability Extended DLVO Extended DLVO
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| GB/T 7714 | Zhang, Yongxiang , Lin, Yuhui , Li, Yajun et al. Study of stability and aggregation kinetics of coated zero-valent iron nanoparticles [J]. | DESALINATION AND WATER TREATMENT , 2022 , 262 : 298-311 . |
| MLA | Zhang, Yongxiang et al. "Study of stability and aggregation kinetics of coated zero-valent iron nanoparticles" . | DESALINATION AND WATER TREATMENT 262 (2022) : 298-311 . |
| APA | Zhang, Yongxiang , Lin, Yuhui , Li, Yajun , Yang, Wenjing , Ye, Yifei , Wang, Jinhao . Study of stability and aggregation kinetics of coated zero-valent iron nanoparticles . | DESALINATION AND WATER TREATMENT , 2022 , 262 , 298-311 . |
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Abstract ：
Evapotranspiration links land surface hydrological processes with the atmosphere and has an important influence on regional water cycles and the water balance. Research has shown that urbanization can impact the hydrological balance, leading to urban wet and dry island effects; however, the mechanisms driving these phenomena remain uncertain. In this study, the humidity levels of urban areas in China were compared with the surrounding areas prior to (1960-1969), and following (2010-2019) rapid urbanization to determine the drivers and mechanisms of urban wet and dry island effects. Monthly observational datasets of temperature, water vapor pressure, and relative humidity from 613 meteorological stations were combined with the processes of urban artificial water dissipation to analyze the temporal and spatial characteristics of urban dry/wet islands. Results showed that cold and dry urban areas tended to have wet island effects, while warm and humid urban areas had dry island effects. The dry/wet island intensity was less than 3.5% in most cities. Furthermore, urban areas tended to be dry islands during summer and wet islands during winter. Coastal cities were an exception, being dry islands throughout the year. Comparisons of humidity prior to and following rapid urbanization revealed that absolute humidity had generally increased, during winter, all regions displayed increased absolute humidity, by as much as 8%-16% in northern China. This was despite an overall trend towards increased dry island intensity, and was attributed to intensifying urban heat island effects. These results provide valuable information to help understand the causes of dry/wet island effects in urban areas.
Keyword ：
Urbanization Urbanization Urban wet island Urban wet island Absolute humidity Absolute humidity Urban dry island Urban dry island Artificial water dissipation Artificial water dissipation China China
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| GB/T 7714 | Luo, Zhuoran , Liu, Jiahong , Zhang, Yongxiang et al. Spatiotemporal characteristics of urban dry/wet islands in China following rapid urbanization [J]. | JOURNAL OF HYDROLOGY , 2021 , 601 . |
| MLA | Luo, Zhuoran et al. "Spatiotemporal characteristics of urban dry/wet islands in China following rapid urbanization" . | JOURNAL OF HYDROLOGY 601 (2021) . |
| APA | Luo, Zhuoran , Liu, Jiahong , Zhang, Yongxiang , Zhou, Jinjun , Yu, Yingdong , Jia, Ruitao . Spatiotemporal characteristics of urban dry/wet islands in China following rapid urbanization . | JOURNAL OF HYDROLOGY , 2021 , 601 . |
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Abstract ：
Groundwater is an important source of water in Beijing. Hydrochemical composition and water quality are the key factors to determine the availability of groundwater. Therefore, an improved integrated weight water quality index approach (IWQI) combining the entropy weight method and the stochastic simulation method is proposed. Through systematic investigation of groundwater chemical composition in different periods, using a hydrogeochemical diagram, multivariate statistics and spatial interpolation analysis, the spatial evolution characteristics and genetic mechanism of groundwater chemistry are discussed. The results show that the groundwater in the study area is weakly alkaline and low mineralized water. The south part of the study area showed higher concentrations of total dissolved solids, total hardness and NO3--N in the dry season and wet season, and the main hydrochemical types are HCO3--Ca and HCO3--Ca-Mg. The natural source mechanism of the groundwater chemical components in Chaoyang District includes rock weathering, dissolution and cation exchange, while the human-made sources are mainly residents and industrial activities. Improved IWQI evaluation results indicate that water quality decreases from southwest to northeast along groundwater flow path. The water quality index (WQI) method cannot reflect the trend of groundwater. Sensitivity analysis indicated that the improved IWQI method could describe the overall water quality reliably, accurately and stably.
Keyword ：
hydrochemistry hydrochemistry Chaoyang district Chaoyang district IWQI IWQI groundwater quality groundwater quality sensitivity analysis sensitivity analysis
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| GB/T 7714 | Zhang, Yongxiang , Jia, Ruitao , Wu, Jin et al. Evaluation of Groundwater Using an Integrated Approach of Entropy Weight and Stochastic Simulation: A Case Study in East Region of Beijing [J]. | INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH , 2021 , 18 (14) . |
| MLA | Zhang, Yongxiang et al. "Evaluation of Groundwater Using an Integrated Approach of Entropy Weight and Stochastic Simulation: A Case Study in East Region of Beijing" . | INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 18 . 14 (2021) . |
| APA | Zhang, Yongxiang , Jia, Ruitao , Wu, Jin , Wang, Huaqing , Luo, Zhuoran . Evaluation of Groundwater Using an Integrated Approach of Entropy Weight and Stochastic Simulation: A Case Study in East Region of Beijing . | INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH , 2021 , 18 (14) . |
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Abstract ：
总结了纳米零价铁常用的制备技术,并比较了各种制备方法的优缺点,分析了纳米零价铁技术在实际应用中存在的问题,叙述了纳米零价铁4种改性方法的研究进展。介绍了国内外关于纳米零价铁技术的中试及场地治理的情况,分析了纳米零价铁工程化应用的制约因素,即纳米零价铁的高制备成本、在地下水流场中的迁移机制不明晰及所造成的生态环境风险难以评估等。认为纳米零价铁技术与生物技术、高级氧化技术、电化学技术等多种技术的联用是未来地下水环境修复治理的一个重要的研究方向,作为新兴的污染场地修复技术在我国有着巨大的发展空间及应用前景。
Keyword ：
制备 制备 改性 改性 纳米零价铁 纳米零价铁 场地应用 场地应用
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| GB/T 7714 | 黄雪征 , 张永祥 , 田振军 et al. 纳米零价铁的制备、改性及场地应用研究进展 [J]. | 水处理技术 , 2021 , 47 (01) : 12-18,26 . |
| MLA | 黄雪征 et al. "纳米零价铁的制备、改性及场地应用研究进展" . | 水处理技术 47 . 01 (2021) : 12-18,26 . |
| APA | 黄雪征 , 张永祥 , 田振军 , 井琦 , 叶逸菲 . 纳米零价铁的制备、改性及场地应用研究进展 . | 水处理技术 , 2021 , 47 (01) , 12-18,26 . |
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Abstract ：
In this study, we used groundwater quality data from 17 sampling sites in Chaoyang District of Beijing, which was measured to analysis hydrochemical characteristics and water quality evaluation combined with Shukarev classification, single factor evaluation method, comprehensive evaluation method and fuzzy comprehensive evaluation method in different seasons in 2018. The results showed that there was little difference in chemical composition and groundwater quality in different seasons. The groundwater ions were mainly HCO3-, Ca2+, and Mg2+ in the western region, and the salinity of water was low. Na+ and Cl- appeared in the southwestern and eastern region, and the concentration of Na+ in May was lower than that in September. Although the single index evaluation method was one-sided, it could determine the main pollutants. Although the comprehensive evaluation method could reflect the water quality status, it greatly highlighted the pollution factors and overestimated the degree of water quality exceeding the standard to some extent. The fuzzy comprehensive evaluation method considered the weight of participating factors, which made the evaluation results more objective and reasonable. The four parameters of TH, Fe3+, NH4+-N and As3+ exceeded the standard, but they generally met the drinking water quality standard. © Published under licence by IOP Publishing Ltd.
Keyword ：
Quality control Quality control Water pollution Water pollution Fuzzy set theory Fuzzy set theory Hydroelectric power plants Hydroelectric power plants Hydrochemistry Hydrochemistry Potable water Potable water Water quality Water quality Hydroelectric power Hydroelectric power Groundwater Groundwater
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| GB/T 7714 | Luo, Zhuoran , Liu, Jiahong , Zhang, Yongxiang et al. Hydrochemical Characteristics and Water Quality Evaluation in Chaoyang District, Beijing [C] . 2021 . |
| MLA | Luo, Zhuoran et al. "Hydrochemical Characteristics and Water Quality Evaluation in Chaoyang District, Beijing" . (2021) . |
| APA | Luo, Zhuoran , Liu, Jiahong , Zhang, Yongxiang , Shao, Weiwei , Jia, Ruitao . Hydrochemical Characteristics and Water Quality Evaluation in Chaoyang District, Beijing . (2021) . |
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Abstract ：
为了提高纳米铁的活性和分散性,在醇水体系下制备出纳米钯铁(Pd/Fe)双金属颗粒并表征,将制得的纳米Pd/Fe颗粒应用于水中2,4-二氯苯酚(2,4-DCP)的去除,考察了材料投加量、反应温度、初始pH值、2,4-二氯苯酚初始浓度等因素对2,4-DCP去除的影响,分析了2,4-DCP的去除机理并进行动力学拟合.结果表明,在醇水体系中制备纳米铁有利于纳米颗粒的稳定分散;钯的加入将脱氯途径转变为催化加氢,极大改善了2,4-DCP的去除效果;当2,4-DCP初始浓度为20 mg/L、反应温度30℃、纳米Pd/Fe颗粒投加量为2 g/L时,2,4-DCP可在5 h内去除99.9％;反应过程符合修正的一级反应动力学方程.
Keyword ：
钯铁 钯铁 2 2 醇水体系 醇水体系 4-二氯苯酚 4-二氯苯酚 加氢脱氯 加氢脱氯
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| GB/T 7714 | 张永祥 , 白冰 , 杨文静 et al. 醇水体系制备纳米Pd/Fe颗粒去除水中2,4-DCP [J]. | 应用化工 , 2021 , 50 (3) : 565-570 . |
| MLA | 张永祥 et al. "醇水体系制备纳米Pd/Fe颗粒去除水中2,4-DCP" . | 应用化工 50 . 3 (2021) : 565-570 . |
| APA | 张永祥 , 白冰 , 杨文静 , 郭汶俊 , 李雅君 . 醇水体系制备纳米Pd/Fe颗粒去除水中2,4-DCP . | 应用化工 , 2021 , 50 (3) , 565-570 . |
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