Article
Energy & Fuels
Heming Dong, Yu Zhang, Qian Du, Jianmin Gao, Qi Shang, Dongdong Feng, Yudong Huang
Summary: The generation and emission characteristics of PM2.5 from three 300 MW power plant circulating fluidized bed boilers were investigated. The results show that the number size distributions of fine particles presented one single peak, but there was no peak in mass size distributions. The minimum removal efficiencies of the precipitator appeared between 0.1 to 1 μm and the number concentration of the external bed CFB boiler was much higher than that of the general CFB boiler.
Article
Engineering, Chemical
Jia Wei Chew, W. Casey Q. LaMarche, Ray A. Cocco
Summary: As we celebrate the 100th anniversary of the commercialization of the fluidized bed reactor, it is evident that fluidized bed technology has undergone significant advancements in the past century. With the development of sophisticated models, experimentation techniques, and statistical tools, as well as the utilization of computational platforms and AI, the application of fluidized bed technology is expected to become more cost-effective and efficient.
Article
Engineering, Environmental
Jiawei Li, Zhichao Chen, Xuyang Zhang, Yanyu Qiao, Zhenhua Yuan, Lingyan Zeng, Zhengqi Li
Summary: This study investigates the form of carbon in coal gasification fine ash (CGFA) and its potential applications. The results show that demineralised carbon (DC) obtained from CGFA can be used as a fuel for combustion, an adsorbent, or a precursor material for activated carbon.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Mechanics
Kenan Xi, Hao Wang, Youjun Lu
Summary: Supercritical water circulating fluidized beds (SCWCFBs) were investigated using a two-fluid model to study flow dynamics. The study focused on various factors such as flow velocities, solid circulation rates, pressures, and temperatures. The results showed similarities between SCWCFB risers and traditional gas-solid risers. The void fraction distributions ranged from 0.85 to 0.95, with lower values at the bottom and near the walls, and higher values at the top and center. The particle velocities exhibited annular-core flow structures, with upward velocities near the axis and downward velocities near the walls. The fluid paths were tortuous at low velocities but straight at high velocities. The particle drag forces were around 0.7-0.8 times the particle weights. The effects of pressures on flow dynamics were attributed to changes in density and viscosity, affecting the fluid's ability to carry particles.
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
Article
Energy & Fuels
Guofeng Li, Dan Wang, Qingxia Liu, Yuemin Zhao, Chenlong Duan
Summary: The study found that by fluidizing and separating simulated coal particles composed of quartz sand and clean coal, the pollution elements in coal can be effectively reduced. Under specific conditions, the ash content of clean coal products can be significantly reduced.
Article
Engineering, Chemical
Xiao Yang, Chengxiu Wang, Xingying Lan, Jinsen Gao
Summary: This study investigated the flow characteristics of desulphurization ash particles in a riser in a circulating fluidized bed (CFB) for semi-dry flue gas desulphurization using CFB technology. The findings showed a relatively high solids holdup near the bottom of the riser, gradually decreasing as the height increases, and a stable value from the middle to the top of the riser. The radial distribution also found low solids holdup in the center and high in the wall region. The particle-based Archimedes number was found to have a linear relationship with the solids holdup at all operating conditions.
Article
Environmental Sciences
Haiping Xiao, Jinlin Ge, Xinyao Li, Dahai Yan, Zhong Liu
Summary: During combustion, a large proportion of elements such as chromium, arsenic, and lead are concentrated in fly ash or bottom ash, with only a small amount being captured by the desulfurization system or entering the environment. The blending of antibiotic residues has little effect on the elemental composition of coal, but increasing the blending ratio may be harmful to the environment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Yan Shi, Wenqi Zhong
Summary: By conducting a comprehensive life-cycle environmental and economic assessment of oxy-coal combustion with circulating fluidized bed power plants with a pressurized combustor and a supercritical CO2 Brayton cycle, it was found that the systems have lower damage to human health and the environment, as well as relatively lower costs of electricity, CO2 capture, and CO2 avoidance. The study also discusses the impact of various parameters on economic indicators.
Article
Engineering, Chemical
Suyang Pan, Jiliang Ma, Daoyin Liu, Xiaoping Chen, Cai Liang
Summary: This paper studies the liquid transport behaviors in a top-sprayed fluidized bed using bed conductance analysis, pressure fluctuation analysis, and bubble image processing. The results show that liquid initially gets trapped in agglomerates before converting to free liquid and spreading from the upper-middle bed to the bottom bed. The disintegrating pattern of agglomerates affects the increase and saturation of free liquid in the bed. The liquid transport process is accelerated by increasing superficial air velocity and particle diameter, while it slows down with increased liquid viscosity and surface tension.
Article
Green & Sustainable Science & Technology
Yong Wei, Guijian Liu, Biao Fu, Ruwei Wang, Yuan Liu, Xuan Xue, Mei Sun
Summary: This study evaluated the distribution and partitioning behavior of Pb in size-resolved fine PM collected from an industrial circulating fluidized bed power plant. The mechanism of Pb enrichment in supermicron particles was mainly controlled by surface adsorption reaction, while gas-film transfer or heterogenous condensation might represent the deposition mechanism for submicron particles. Additionally, the emission of fine SiO2-bearing particles should be limited due to their potential harm to the respiratory system.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Panyang He, Yaojun Zhang, Xiaomin Zhang, Hao Chen
Summary: The study successfully transformed geopolymers into zeolite materials using lithium or potassium cations, as well as structure-directing agents, to remove lead ions from aqueous solutions. The results demonstrated efficient chemical adsorption of Pb2+ onto the zeolite surfaces, confirming monolayer adsorption. This work offers new insights for sustainable wastewater treatment methods by utilizing industrial waste and developing geopolymer-based adsorbents.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Jiaying Wang, Zeneng Sun, Yuanyuan Shao, Jesse Zhu
Summary: Circulating fluidized bed combustors are commonly used gas-solid convertors globally. Different operating regimes have been suggested by researchers, but there is still no universally accepted conclusion. Analysis of reported data supports the operation of the bottom part in the bubbling regime and the upper part as an entrained bed in commercial boilers.
Article
Engineering, Chemical
Tian Nan, Jesse Zhu
Summary: The hydrodynamics of inverse liquid-solid circulating fluidized bed were studied comprehensively, revealing specific flow patterns and solid distribution laws, influenced by factors such as particle size and flow velocity.
CHEMICAL ENGINEERING SCIENCE
(2022)
Review
Energy & Fuels
Chen Ge, Shiyuan Li, Linwei Wang
Summary: Oxy-fuel circulating fluidized bed combustion (Oxy-CFBC) is a promising and sustainable technology for carbon capture, utilization, and sequestration in coal-fired power plants. In the past 15 years, research on Oxy-CFBC has rapidly developed, from lab-scale to industrial-scale facilities. This paper reviews the research status of Oxy-CFBC, including models, heat transfer, combustion characteristics, pollutant formation and emission, and system optimization. It also analyzes different fuels and the differences in NOx emission and desulfurization mechanism between air combustion and oxy-combustion modes. The review highlights the importance of gas staging and oxygen staging in reducing NO emissions, and discusses new generation technologies and challenges for future research and industrial application of Oxy-CFBC.
Article
Environmental Sciences
Md Manik Mian, Guijian Liu, Balal Yousaf, Biao Fu, Habib Ullah, Muhammad Ubaid Ali, Qumber Abbas, Mehr Ahmed Mujtaba Munir, Liu Ruijia
Review
Environmental Sciences
Habib Ullah, Guijian Liu, Balal Yousaf, Muhammad Ubaid Ali, Qumber Abbas, Mehr Ahmed Mujtaba Munir, Md Manik Mian
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2018)
Article
Environmental Sciences
Md Manik Mian, Guijian Liu, Balal Yousaf, Biao Fu, Rafay Ahmed, Qumber Abbas, Mehr Ahmed Mujtaba Munir, Liu Ruijia
JOURNAL OF ENVIRONMENTAL SCIENCES
(2019)
Article
Environmental Sciences
Md Manik Mian, Guijian Liu
Article
Chemistry, Physical
Md Manik Mian, Guijian Liu, Biao Fu, Yu Song
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Review
Environmental Sciences
Md Manik Mian, Guijian Liu, Biao Fu
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Biao Fu, Guijian Liu, Md Manik Mian, Chuncai Zhou, Mei Sun, Dun Wu, Yuan Liu
Article
Engineering, Environmental
Md Manik Mian, Guijian Liu
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Environmental Sciences
Mehr Ahmed Mujtaba Munir, Guijian Liu, Balal Yousaf, Md Manik Mian, Muhammad Ubaid Ali, Rafay Ahmed, Ayesha Imtiyaz Cheema, Mu Naushad
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2020)
Article
Environmental Sciences
Huihui Zhou, Guijian Liu, Liqun Zhang, Chuncai Zhou, Md Manik Mian, Ayesha Imtiyaz Cheema
Summary: Arsenic in copper flash smelting systems mainly circulates through recycled materials, especially arsenic from recycled dust and slag concentrate. Reducing the recovery of FSF ESP dust can greatly decrease the arsenic content. FSF slag concentrate poses a high arsenic-related environmental risk and should be carefully handled.
ENVIRONMENTAL POLLUTION
(2021)
Article
Green & Sustainable Science & Technology
Muhammad Arif, Guijian Liu, Muhammad Zia ur Rehman, Balal Yousaf, Rafay Ahmed, Md Manik Miana, Aniqa Ashrafa, Mehr Ahmed Mujtaba Munirf, Muhammad Saqib Rashida, Asif Naeem
Summary: This study investigates the removal of ciprofloxacin using biochar treated with clay mineral and activated with carbon dioxide. The results indicate that the CO2 activated biochar-clay mineral composite is effective in removing ciprofloxacin from aqueous solutions, achieving a removal efficiency almost two times higher than pristine biochar.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Green & Sustainable Science & Technology
Md Manik Mian, Nur Alam, Md Sohel Ahommed, Zhibin He, Yonghao Ni
Summary: This review systematically summarized the latest research on carbon-based catalysts, including synthesis routes, physicochemical properties, and applications in AOPs and ESDs. It also provided scientific insight into various catalytic mechanisms and highlighted the challenges and prospects of this emerging field.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Aniqa Ashraf, Guijian Liu, Muhammad Arif, Md Manik Mian, Audil Rashid, Balal Yousaf, Muhammad Irfan Khawar, Luqman Riaz, Rabia Safeer
Summary: The increase in global antibiotic usage has resulted in environmental problems, as antibiotics are released into waterbodies. This leads to the development of antibiotic-resistant bacteria and genes, creating a cycle of increasing antibiotic resistance. Therefore, there is an urgent need for an approach to remove antibiotics from water. Graphene and graphene-based nanomaterials have shown promising performance in antibiotic treatments, but their high production cost limits their usage. This review explores low-cost graphene production sources/processes and provides evidence supporting the use of graphene and graphene-based materials in antibiotic pollution remediation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Md Manik Mian, Guijian Liu, Huihui Zhou
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Review
Environmental Sciences
Attila Csaba Kondor, Anna Viktoria Vancsik, Laszlo Bauer, Lili Szabo, Zoltan Szalai, Gergely Jakab, Gabor Maasz, Marta Pedrosa, Maria Jose Sampaio, Ana Rita Lado Ribeiro
Summary: This review provides a critical overview of research on the removal efficiency of priority substances and compounds of emerging concern through bank filtration, discussing influencing factors and future challenges. The findings show that the efficiency of bank filtration is influenced by multiple factors and varies for different substances.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Xinyan Wang, Shuai Zhang, Huihui Yan, Zhao Ma, Yunshan Zhang, Haining Luo, Xueli Yang
Summary: This study investigated the association between ambient PM2.5, O3 pollution, and ovarian reserve in reproductive-aged Chinese women. The results showed that increased exposure to PM2.5 and O3 was associated with decreased AMH levels, indicating reduced ovarian reserve. Notably, the effects of O3 exposure on ovarian reserve were different from those of PM2.5 exposure.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Tingting Ma, Yanjuan Ding, Fengjiao Xu, Chen Zhang, Min Zhou, Ya Tang, Yanrong Chen, Yating Wen, Rufei Chen, Bin Tang, Shigui Wang
Summary: The dragonfly species Orthetrum albistylum can accumulate heavy metals, and its heat shock protein genes have the potential to serve as biomarkers for monitoring environmental pollutants.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Naoto Ishiwaka, Koya Hashimoto, Masayoshi K. Hiraiwa, Francisco Sanchez-Bayo, Taku Kadoya, Daisuke Hayasaka
Summary: Systemic insecticides and rising temperatures have combined effects on the abundance of Odonata nymphs in paddy fields. The standalone effect of insecticide exposure decreased the Odonata community, while nymphs decreased synergistically with temperature rise in paddy water. However, the impacts of each stressor alone varied among species.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Marco Vecchiato, Carlo Barbante, Elena Barbaro, Francois Burgay, Warren R. L. Cairns, Alice Callegaro, David Cappelletti, Federico Dallo, Marianna D'Amico, Matteo Feltracco, Jean-Charles Gallet, Andrea Gambaro, Catherine Larose, Niccolo Maffezzoli, Mauro Mazzola, Ivan Sartorato, Federico Scoto, Clara Turetta, Massimiliano Varde, Zhiyong Xie, Andrea Spolaor
Summary: The Arctic region is facing contamination from long-range pollution and local human activities. Polycyclic Aromatic Hydrocarbons (PAHs) are used as environmental indicators for emission, transport, and deposition processes. Research conducted in the Arctic surface snow in Ny-Ålesund, Svalbard from October 2018 to May 2019 shows that long-range inputs of PAHs mainly occur in winter, while the most abundant analyte retene exhibits opposite seasonal trends.
ENVIRONMENTAL POLLUTION
(2024)
Review
Environmental Sciences
Maoshui Zhuo, Zhijie Chen, Xiaoqing Liu, Wei Wei, Yansong Shen, Bing-Jie Ni
Summary: This paper discusses the application of three catalytic processes (photocatalysis, electrocatalysis, and biocatalysis) in the management of microplastic pollution, and introduces the efficiency and catalytic mechanisms of different catalysts. It also proposes the development prospects for sustainable management of microplastic pollution.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Shiyu Chen, Zhenzhen Shi, Qiang Zhang
Summary: In this study, a human physiologically based pharmacokinetic (PBPK) model of diethyl phthalate (DEP) was developed to assess its toxicity. The model considers the distribution and metabolism of DEP and its active metabolite monoethyl phthalate (MEP) in different tissue compartments. Sensitivity analysis and Bayesian Markov chain Monte Carlo (MCMC) simulations were performed to evaluate the uncertainty and variability of the model parameters. The results suggest that dermal absorption is an important route of exposure to DEP in the environment.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Bangguo Wang, Lijing Wang, Wenxi Cen, Tao Lyu, Peter Jarvis, Yang Zhang, Yuanxun Zhang, Yinghui Han, Lei Wang, Gang Pan, Kaili Zhang, Wei Fan
Summary: This study investigates the feasibility and mechanisms of a chemical-free nanobubble-based AOP for treating organic micropollutants in water. The results show that the oxygen nanobubble AOP has a significantly higher removal efficiency compared to air and nitrogen nanobubbles. The treatment performance is not affected by pH and the presence of ions. Higher initial concentrations of the micropollutant lead to slower treatment processes, but similar removal performance is achieved in the end. The presence of organic matter reduces the removal rate of the micropollutant. The results have practical feasibility for water and wastewater treatment.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Yingmei Huang, Jicai Yi, Yao Huang, Songxiong Zhong, Bin Zhao, Jing Zhou, Yuxuan Wang, Yiwen Zhu, Yanhong Du, Fangbai Li
Summary: This study investigates the impact of biochar on methylmercury (MeHg) accumulation in rice. The results show that biochar reduces MeHg levels in paddy soils by decreasing bioavailable Hg and microbial Hg methylation. Additionally, biochar decreases the uptake and translocation of MeHg in rice plants, resulting in a reduction of MeHg accumulation in rice grains.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Nengde Zeng, Fei Huang, Jiani Du, Chenghao Huang, Qian Yang, Xinhua Zhan, Baoshan Xing
Summary: This study investigates the protein targets and protein-ligand interactions related to PAH contamination in crop xylem sap using computational tools. The results show that phenanthrene has a more pronounced effect on the xylem sap proteins of maize and wheat, with maize DEPs associated with lipid biosynthesis and wheat DEPs exhibiting an increase in ABC transporters. This study provides insights into the regulation and movement of PAHs within plant xylem.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Xinwei Chen, Hao Ma, Run Wang, Man Wang, Binbin Zhu, Yanqing Cong, Xiayue Zhu, Guoqin Wang, Yi Zhang
Summary: Co3O4/TiO2-NRs electrodes with excellent photoresponse were prepared via plasma-assisted modification of Co3O4 on TiO2. The combination of Co3O4 and TiO2 improved the light utilization efficiency and showed potential for degradation of pollutants.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Wenjing Ji, Liying Song, Jing Wang, Hongqing Song
Summary: This study conducted a life-cycle assessment to examine the correlation between natural gas consumption and carbon emissions in different end uses in China. The results showed that both natural gas consumption and life-cycle carbon emissions have been increasing since 2017. Significant variations in NG life-cycle carbon emissions were found across different provinces and sectors, highlighting the need for targeted efforts to reduce carbon emissions.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Youyi Chen, Boxuan Zhang, Pojun Zhang, Guogui Shi, Hao Liang, Wu Cai, Jingyu Gao, Sumin Zhuang, Kaiyin Luo, Jiaqi Zhu, Chaoxiang Chen, Kunyu Ma, Jinrong Chen, Chun Hu, Xueci Xing
Summary: The synergistic effects of trace sulfadiazine and cast-iron corrosion scales on the formation of disinfection by-products in drinking water distribution systems were investigated. The presence of magnetite resulted in increased concentrations of DBPs due to the higher microbial activity and enhanced microbial extracellular electron transport pathway. The study highlights the importance of considering trace antibiotics pollution and corrosion scales in water sources for DBP control.
ENVIRONMENTAL POLLUTION
(2024)
Review
Environmental Sciences
Bishwa Raj Pokharel, Vijay Sheri, Manoj Kumar, Zhiyong Zhang, Baohong Zhang
Summary: This review summarizes the interactions, uptake, and transport of aluminum nanoparticles (Al-NPs) in plants, highlighting their negative effects on plant growth and development, as well as their potential to alter plant defense systems and gene expression.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Yonglu Wang, Fengsong Zhang, Xiaoyong Liao, Xiao Yang, Guixiang Zhang, Liyun Zhang, Chaojun Wei, Pengge Shi, Jiongxin Wen, Xiaorong Ju, Can Xu, Yang Liu, Ying Lan
Summary: This study aims to explore the effects of thiencarbazone-methyl center dot isoxaflutole on soil microflora and the potential mitigation mechanisms to bacterial communities. It was found that increasing the application of thiencarbazone-methyl center dot isoxaflutole resulted in increased stress on soil bacterial community structure and diversity. Increasing soil pH was recognized as a key factor in improving the diversity and structure of soil microflora. Supplemental use of nitrapyrin or modified attapulgite can increase soil pH and improve bacterial diversity.
ENVIRONMENTAL POLLUTION
(2024)
