Zhaoyang Li

Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

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Shiming Deng

Qatar University

Yuying Sun

Beijing University of Technology

Yao Lin

Peking University First Hospital

Wenzhe Wei

Beijing University of Technology

Chengyang Huang

Beijing University of Technology

Huijie Hou

Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

Jingping Hu

Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

Wei Wang

Beijing University of Technology

Sha Liang

Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

Jiakuan Yang

Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

Cooperative Institutions

Beijing University of Technology

Huazhong University of Science and Technology

Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

Harbin Institute of Technology

Tsinghua University

Zhejiang University

University of Chinese Academy of Sciences

Chinese Academy of Sciences

Wuhan National Laboratory for Optoelectronics

Jilin University

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Facile Recovery of Lead in Discarded Perovskite Solar Cells via Ultrasonic Water Leaching

Environmental Science & Technology Letters (2025)

Guang Hu Zhaoyang Li Qisu Zou Shifa Zhou Sha Liang

Perovskite solar cells (PSCs) stand at the forefront of advanced optoelectronic devices because of their high theoretical power conversion efficiency, cost-effectiveness, and broad application potential. However, as a crucial component in high-performance PSCs, highly toxic lead may leak from discarded PSCs and cause environmental and health risks. Implementing the effective recovery of lead from discarded PSCs is crucial for the sustainable development of the PSC industry. Existing lead recovery methods commonly use toxic organic solvents as leaching reagents, i.e., dimethyl formamide and dimethyl sulfoxide, impeding the potential application of recycling technologies. This study proposes a facile ultrasonic water leaching technique for effectively recovering lead from the glass substrate of discarded PSCs. During the ultrasonic water leaching process, the perovskite layer undergoes rapid degradation, generating PbI2. Most of the PbI2 dissolves in the water, yielding a leaching solution containing a low lead concentration, while a minor fraction is converted into insoluble Pb(OH)I particles. The cumulative Pb removal ratio from the first two cycles of ultrasonic water leaching processes can reach 99.84%. High-purity (>99.9 wt %) PbI2 crystals could be synthesized through an evaporation–crystallization step. This study proposes a vital strategy for the sustainable management of discarded perovskite photovoltaic devices without the addition of any organic solvents.

Lead (geology)

10.1021/acs.estlett.4c00735

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High density sampling reveals the spatiotemporal characteristics of microbial communities in a full-scale municipal wastewater treatment plant

Frontiers of Environmental Science & Engineering (2024)

Zhaoyang Li Liang Zhang LI Jinghan Da Kang Jialin Li

Abstract Insights into the microbial communities in municipal wastewater treatment plants (WWTPs) are critical for the optimization of biological nutrient removal process. However, our understanding about the spatiotemporal characteristics of the microbial communities in WWTPs remains limited. In the present study, 264 samples were collected biweekly from four spatially independent corridors in a typical municipal WWTP. The annual compositional and metagenomic characteristics were investigated based on multiple ecological indicators using statistical tests. The results revealed that the microbial community compositions from the four corridors showed significantly high similarities, as revealed by the statistical analysis at the operational taxonomic unit (OTU) level. Consistent with the OTU level results, the functionality of the microbial communities in the four independent corridors also showed significant similarity. In comparison, the dynamics of the microbial community over the year showed two successional peaks of the microbial communities with the spatial similarity, and this resulted in three alternative stable states of the microbial communities in a calendar year. The microbial communities only drifted in July and November, suggesting an uneven community succession pattern driven by seasonal variation in environmental conditions. The functional characteristics were found to be relatively conservative compared to the microbial community succession, which revealed the decoupling between the composition and functionality of the microbial community in the municipal WWTP. The present study provides an in-depth overview of the microbial communities in a municipal WWTP and will be useful for the establishment of the connection between ecological characteristics and the operational stability of WWTPs.

10.1007/s11783-025-1943-5

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Environmentally Friendly Recovery of Li₂CO₃ from Spent Lithium-Ion Batteries by Oxidation and Selective Leaching Process

ACS ES&T Engineering (2024)

Ying Zheng Zhe Yang Zhaoyang Li Guang Hu Sha Liang

The extraction of valuable metals from spent Ni–Co–Mn oxide (NCM) cathodes typically encounters the use of strong acids or alkalis, often leading to secondary pollution. Herein, an environmentally friendly recovery route for the selective extraction of lithium (Li) by using sodium persulfate (Na2S2O8) as the sole leaching agent was proposed. Under the optimized conditions, the leaching efficiency of Li achieved 98.02%, and the selective leaching efficiency of Li was 94.80%. Moreover, the lithium carbonate (Li2CO3) product was recovered from the Li-rich filtrate with a high purity of 99.5%. The mechanism of Li selective leaching was revealed by means of wet chemistry, kinetics, thermodynamics, and solid-phase analysis. During selective leaching, free radicals SO4•– and •OH, hydron ion (H+), and sodium ion (Na+) were generated by Na2S2O8. These free radicals can increase the redox potential of the leaching system. Under these conditions, Co and Mn elements were both maintained in a high valence state and the cathode structure was collapsed, thus contributing to the leaching of Li. The proposed environmentally friendly recovery process of Li from spent NCM cathodes is promising for practical applications, offering significant economic benefits.

Environmentally Friendly

Selective leaching

10.1021/acsestengg.4c00134

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Space heating performance analysis of air source heat pump integrated with image gray recognition-based defrosting controller

Applied Thermal Engineering (2023)

Shiquan Wang Wenzhe Wei Jingsi Xie Wei Wang Yuying Sun

Defrosting

10.1016/j.applthermaleng.2023.121536

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Comparative study on the hydrogeochemical environment at the major drinking water based arsenism areas

Applied Geochemistry (2016)

Jie Tang Jianmin Bian Zhaoyang Li Yanmei Li Wei Yang

10.1016/j.apgeochem.2016.06.008

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A novel characteristic index for frosting suppression based on the configuration and operation of air source heat pumps

International Journal of Refrigeration (2019)

Shimin Liang Wei Wang Yuying Sun Zhaoyang Li Jihan Zhao

10.1016/j.ijrefrig.2019.10.009

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Citations (33)

A review on coal-to-electricity policies into practice in northern China

IOP Conference Series Earth and Environmental Science (2019)

Zhaoyang Li Zhaowei Xu Yuying Sun Zhichao Wang Shiming Deng

Abstract China has been promoting clean energy heating in an all-around way since recent year to reduce air pollution and energy consumption as a result of using coal for winter heating. Supported by a series of Chinese government policies, a coal-to-electricity project become a significant measure for clean energy heating in Beijing-Tianjin-Hebei region and the surrounding areas, which has obviously improved air quality in northern China. The coal-to-electricity project can involve engagement from multiple levels of government and social companies, wherein government is uniquely positioned to provide leadership. However, factors contributing or hindering policies into practice are largely unexplored. This paper presents a review on coal-to-electricity policies into practice through summarizing government policies and practical investigation, including its planning, scope, funding, process, and technical types analysis. In addition, a prospect of coal-to-electricity project in northern China is also given. It is found that the coal-to-electricity project holds a meaningful contribution and promising potential of development given the urgent need for clean energy heating in large areas of northern China. Government financial subsidy is driving force and efficient technical types are carrier. It was further demonstrated that a large amount of government financial subsidy and the application of efficient technology will contribute to the implementation of coal-to-electricity project, which may provide reference for transition of other energy and low carbon policies into practice.

Clean coal

Scope (computer science)

10.1088/1755-1315/329/1/012054

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Experimental study on the effects of melted frost icing on the operating performances of air source heat pump

Applied Thermal Engineering (2023)

Zhaoyang Li Wenzhe Wei Wei Wang Yuying Sun Shiquan Wang

Defrosting

Frost (temperature)

10.1016/j.applthermaleng.2023.122136

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Citations (15)

Determination of the defrosting duration ratio for defrosting performance evaluation of air source heat pump

Journal of Building Engineering (2024)

Zhaoyang Li Wenzhe Wei Wei Wang Yuying Sun Shiquan Wang

Defrosting

10.1016/j.jobe.2024.110305

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Citations (1)

Theoretical research on high-efficiency region in cryogenic micro flow heat transfer based on thermal and viscous Knudsen numbers

Case Studies in Thermal Engineering (2024)

Huikun Cai Zhaoyang Li Zhihong Du Yidong Lu

Cryogenic micro flow heat transfer (CMFHT) has been increasingly interest nowadays due to the urgent needs of superconductive technology, quantum engineering, space cryocooler and other frontier fields. Chasing its high-efficiency region is a key challenge as thermal penetration depth is limited in cryogenic microscale. Therefore, this paper focuses on high-efficiency region in CMFHT, and newly proposes two parameters: thermal and viscous Knudsen numbers (KnT and Knv) based on traditional Knudsen number Kn, which can improve the errors on micro measurement and the inconveniences on high-efficiency region analysis induced by Kn. High-efficiency region is modeled by the three Knudsen numbers and is separated into slip or continuum type bounded by Kn = 0.001. The effects of gas species, temperature and pressure on KnT and Knv are studied and it is found that the reductions of both thermal penetration depth and the range between thermal and viscous penetration depths with temperature dropping deteriorate heat transfer at low temperature. After applicability validations based on opened literatures, it is suggested that in cryogenics ensuring Kn > KnT (L<δT) is put in the first for good heat transfer, and the next is trying the best to ensure Knδv) or making Kn and Knv as close as possible.

Microscale chemistry

Cryogenics

Thermal engineering

10.1016/j.csite.2024.104758

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