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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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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 ：
Urban evaporation, as an essential part of local water vapor resources in urban areas, has often been underestimated. One possible reason is that the evaporation of urban hardened surfaces is seldom considered and poorly understood in urban evaporation estimation. This study focused on the mechanisms and calculation of evaporation on hardened surfaces in urban areas. Experimental monitoring was used to monitor the processes and characteristics of evaporation on hardened surfaces. Mathematical models based on water quantity constraints were built to calculate evaporation of hardened surfaces. The results showed that: The interception abilities for rainwater and rainfall days of impervious hardened surfaces determine their evaporated water amount, which means no water, no evaporation for the impervious surfaces. The greater evaporation of artificial sprinkling on roads happened in fewer days of rainfall and frost. The evaporation of pervious hardened ground is continuous compared to the impervious surface. Its soil moisture in the sub-layer of permeable concrete decreases periodically with a period of one day. The evaporation of hardened surfaces occupies 16-29% of the total amount of evaporation in the built-up areas in cities. Therefore, the hardened surface evaporation has great significance on the urban hydrological cycle and urban water balance.
Keyword ：
urban hydrology urban hydrology evaporation evaporation urban environment urban environment hardened surfaces hardened surfaces urban thermal comfort urban thermal comfort
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| GB/T 7714 | Zhou Jinjun , Liu Jiahong , Chu Qi et al. Mechanisms and Empirical Modeling of Evaporation from Hardened Surfaces in Urban Areas. [J]. | International journal of environmental research and public health , 2021 , 18 (4) . |
| MLA | Zhou Jinjun et al. "Mechanisms and Empirical Modeling of Evaporation from Hardened Surfaces in Urban Areas." . | International journal of environmental research and public health 18 . 4 (2021) . |
| APA | Zhou Jinjun , Liu Jiahong , Chu Qi , Wang Hao , Shao Weiwei , Luo Zhuoran et al. Mechanisms and Empirical Modeling of Evaporation from Hardened Surfaces in Urban Areas. . | International journal of environmental research and public health , 2021 , 18 (4) . |
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Abstract ：
A novel and amplifying anaerobic electrochemical membrane bioreactor (AnEMBR, R2) was constructed and operated for a long time (204 days) with synthetic glucose solution having an average chemical oxygen demand (COD) of 315 mg L-1, at different applied voltages and room temperatures. More than twice sodium bicarbonate was added for maintaining a pH of around 6.7 in the supernatant of the reactor R2, close to that of a control reactor called anaerobic membrane bioreactor (AnMBR, R1), after 138 days. And the transmembrane pressure (TMP) for the R2 system was only 0.534 bar at the end of operation and 0.615 bar for the R1 system. Although the electrostatic repulsion force contributed to pushing away the pollutants (proteins, polysaccharose and inorganic salt deposits, and so on), more microorganisms adsorbed and accumulated on the membrane surface after the whole operation, which might result in a rapid increase in membrane filtration resistance in the long-term operation. There were much more exoelectrogenic bacteria, mainly Betaproteobacteria, Deltaproteobacteria and Grammaproteobacteria, on the cathode and the dominant methanogen Methanothrix content on the cathode was three times higher than the AnMBR. The study provides an important theoretical foundation for the application of AnEMBR technology in the treatment of low organic strength wastewater.
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| GB/T 7714 | Cao, Mengjing , Zhang, Yongxiang , Zhang, Yan . Effect of applied voltage on membrane fouling in the amplifying anaerobic electrochemical membrane bioreactor for long-term operation [J]. | RSC ADVANCES , 2021 , 11 (50) : 31364-31372 . |
| MLA | Cao, Mengjing et al. "Effect of applied voltage on membrane fouling in the amplifying anaerobic electrochemical membrane bioreactor for long-term operation" . | RSC ADVANCES 11 . 50 (2021) : 31364-31372 . |
| APA | Cao, Mengjing , Zhang, Yongxiang , Zhang, Yan . Effect of applied voltage on membrane fouling in the amplifying anaerobic electrochemical membrane bioreactor for long-term operation . | RSC ADVANCES , 2021 , 11 (50) , 31364-31372 . |
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Abstract ：
纳米零价铁(nZVI)具有较强的还原和吸附能力,能有效去除多种类型的污染物质,在地下水环境修复领域一直备受关注.但由于其易团聚和易钝化等缺陷,在实际应用过程中还存在着许多问题.本文综述了nZVI的常用制备方法,并对nZVI的常用改性方法进行归纳,分析各种改性方法起到的具体作用,指出改性过后的复合材料依然存在着的问题.在此基础上,阐述了改性nZVI在去除地下水中有机污染物和无机污染物的应用进展,总结了改性nZVI材料在去除过程中起到的具体作用和反应机制,并进一步归纳现阶段nZVI在地下水修复中的传输手段.根据已有研究成果,指出应改进现有制备方法实现nZVI的量产,在考虑nZVI生物毒性和材料再回收的前提下,合理使用多种改性方式实现nZVI的材料制备,选择符合污染场地实际情况的传输手段,从而提高nZVI在地下水污染修复中的使用寿命和对目标污染物的处理效果.
Keyword ：
纳米材料 纳米材料 环境修复 环境修复 地下水污染 地下水污染 改性 改性 纳米零价铁 纳米零价铁
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| GB/T 7714 | 张永祥 , 王晋昊 , 井琦 et al. 地下水修复中纳米零价铁材料制备及应用综述 [J]. | 化工进展 , 2021 , 40 (8) : 4486-4496 . |
| MLA | 张永祥 et al. "地下水修复中纳米零价铁材料制备及应用综述" . | 化工进展 40 . 8 (2021) : 4486-4496 . |
| APA | 张永祥 , 王晋昊 , 井琦 , 李雅君 . 地下水修复中纳米零价铁材料制备及应用综述 . | 化工进展 , 2021 , 40 (8) , 4486-4496 . |
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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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