Review
Green & Sustainable Science & Technology
Leslaw Swierczek, Bartlomiej Michal Cieslik, Piotr Konieczka
Summary: This article discusses the method of using sewage sludge ash (SSA) in cement building materials and its environmental benefits. In addition, the article analyzes the impact of SSA on the characteristics of building materials and the effectiveness of cement products in immobilizing contaminants.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Environmental Sciences
Matej Husek, Jaroslav Mosko, Michael Pohorely
Summary: With the growing emphasis on environmental protection, this review analyses different methods of sewage sludge treatment in terms of potential environmental risk and raw materials recovery. The study suggests that direct use of sewage sludge in agriculture should no longer be considered as a source of nutrients and organic matter due to its pollutant content. The review also highlights pyrolysis as a sustainable method for sludge treatment in remote locations with low heavy metal content, and discusses different technologies for recovering phosphorus from sludge ash.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Analytical
Agnieszka Krzyszczak, Michal P. Dybowski, Bozena Czech
Summary: The research investigates the effect of pyrolysis temperature on the formation of PAHs and their derivatives in biochars, showing that temperature and feedstock types affect the content and types of bioavailable PAHs. The study also reveals varying levels of toxic compounds in biochars derived from different sources, with potential limitations on their agricultural applications.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Environmental Sciences
Paulina Godlewska, Patryk Oleszczuk
Summary: This study investigated the persistence and bioavailability of polycyclic aromatic hydrocarbons (PAHs) in biochar-amended soil. The study found that the production conditions of biochar and the change in atmosphere can affect the content of PAHs in the soil.
ENVIRONMENTAL POLLUTION
(2022)
Article
Energy & Fuels
Yi Xiao, Ruihua Zhao, Zhongpu Xiong, Xiaoyu Li, Juan Chen, Hong Yao
Summary: Research on the migration and transformation of phosphorous during sewage sludge incineration showed that increasing temperature improved phosphorous recovery in ash. The retention of phosphorous was mainly determined by calcium species in the sludge. Introducing 2% steam into the combustion atmosphere aided in minerals capturing gaseous phosphorous.
Article
Environmental Sciences
Agnieszka Cydzik-Kwiatkowska, Natalia Milojevic, Piotr Jachimowicz
Summary: This review explores the fate of microplastics in sewage sludge systems and presents alternative methods for sustainable sludge disposal. The study emphasizes the importance of preventing microplastics from entering the environment and addressing their presence in sludge through legislation and proper waste management practices. The information provided aims to develop effective strategies for reducing the transfer and impact of microplastics on the environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Engineering, Environmental
Huimin Chang, Yan Zhao, Silan Zhao, Anders Damgaard, Thomas H. Christensen
Summary: Thermal treatment of sewage sludge has gained significant attention in recent years. Numerous papers have discussed the mass flows, energy, and emissions data related to incineration, gasification, and pyrolysis of sewage sludge. Incineration is an established technology, but there is limited data on flue gas cleaning and air emissions. Gasification and pyrolysis are experimental technologies with varying output data.
Article
Engineering, Environmental
Dorette Muller-Stover, Rhys Thompson, Changyong Lu, Tobias Pape Thomsen, Nadia Glaesner, Sander Bruun
Summary: Thermal conversion of phosphorus-rich waste materials offers advantages such as bioenergy generation and concentration of plant nutrients. The study found that particle size management and post-process oxidation can affect the plant availability of phosphorus in the final products. Different thermal processes modify the chemical and physical structure of the feedstock in varying ways, impacting phosphorus speciation and plant availability in the residual ashes or carbonization products.
Article
Green & Sustainable Science & Technology
Robert Cichowicz, Jacek Wisniewski
Summary: The COVID-19 pandemic has had a significant impact on various aspects of the world, including health, social behavior, economy, and the environment. Research shows that the pandemic restrictions have led to increased pollutant emissions in the exhaust fumes of sewage treatment plants.
Review
Green & Sustainable Science & Technology
Yu Liang, Donghai Xu, Peng Feng, Botian Hao, Yang Guo, Shuzhong Wang, Jiri Jaromir Klemes
Summary: The incineration of municipal sewage sludge is a relatively mature technology, but it still faces challenges in pollutant emission. Co-combustion is a method that does not require new equipment and can be more environmentally friendly.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Yunfeng Xu, Jingyan Chen, Fei Yang, Yangfan Fang, Guangren Qian
Summary: Increasing temperature and time can promote the volatilization of non-apatite inorganic phosphorus (NAIP), while magnesium chloride (MgCl2) and calcium chloride (CaCl2) can greatly facilitate the conversion of NAIP to apatite phosphorus (AP). Research findings suggest that chlorine additives in sewage sludge incineration can help achieve higher bioavailability of phosphorus-containing minerals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Xiaoyong Zhang, Xiaoping Chen, Jun Xiao, Xiaowei Peng, Jianguo Wang, Jiliang Ma, Daoyin Liu, Cai Liang
Summary: In this study, a comparative life cycle assessment of sewage sludge incineration processes was conducted. It was found that co-incineration in coal-fired power plants had the best environmental performance, while sewage sludge mono-incineration had the highest disposal costs.
WASTE MANAGEMENT & RESEARCH
(2023)
Article
Environmental Sciences
Anna Siatecka, Patryk Oleszczuk
Summary: This study investigated the effects of freeze-thaw cycles on the properties and PAH content of sewage sludge (SSL)- and willow-derived biochars obtained at different temperatures. The fate of Ctot PAHs was found to depend on the type of SSL and the properties of the feedstock. Low-temperature SSL-derived biochars were especially affected, as the interactions between PAHs and matrix were weakened by functional groups on the biochar surface. Additionally, the availability of solvent non-extractable PAHs increased after aging due to the removal of ash or biochar particle fragmentation. The sigma 16 Cfree PAHs in biochars decreased with surface functionalization and were generally independent of feedstock and biochar properties.
Article
Engineering, Environmental
Binyun Du, Zhaosheng Yu, Yunlong Tian, Xiaoqian Ma
Summary: By adding baking soda to the co-hydrothermal carbonization process of sewage sludge and Chlorella vulgaris, the cleanliness of hydrochar was improved, with reduced N and S contents, decreased NOX and SOX emissions, and higher fixation ratios of heavy metals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Anna Siatecka, Patryk Oleszczuk
Summary: This study investigated the impact of enzymatic aging on the content of PAHs in biochars and compared the physicochemical properties and phytotoxicity of pristine and aged biochars. Aging increased the surface area and pore volume of most biochars. The enzyme caused an increase in the content of Ctot light PAHs in biochars and heavy PAHs in low-temperature SSL-derived biochars. The study also found that aging improved the ecotoxicological properties of all biochars.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Huaqin Wang, Bo Zhao, Linbo Qin, Yu Wang, Fei Yu, Jun Han
MOLECULAR CATALYSIS
(2020)
Article
Energy & Fuels
Bo Zhao, Geng Chen, Zijiang Xiong, Linbo Qin, Wangsheng Chen, Jun Han
Summary: The study found a close relationship between ash fusion temperature, coal type, and combustion temperature with arsenic distribution and morphology during coal combustion. An arsenic volatilization model was developed to accurately predict arsenic emission during co-combustion, with the exception of JingLong (JL) coal at 1500 degrees C.
Article
Energy & Fuels
Linbo Qin, Jia Song, Yangshuo Liang, Bo Zhao, Geng Chen, Jun Han
Summary: Fly ash enriched with higher levels of Ca and Fe components, obtained through gravity separation, can effectively capture arsenic from flue gas. The presence of sulfur compounds in the flue gas can further enhance the arsenic adsorption capacity of the sorbent.
Article
Green & Sustainable Science & Technology
Bo Zhao, Geng Chen, Linbo Qin, Yuxin Han, Qiang Zhang, Wangsheng Chen, Jun Han
Summary: The study proposed blending coal technology to control arsenic emission during coal combustion, showing that blending coal could suppress fine particle formation and reduce arsenic content. The main mechanisms were the decreased ash fusion temperature during blended coal combustion, promoting key reactions and inhibiting fine particle formation.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Bo Zhao, Qijun Yang, Linbo Qin, Weiwei Shan, Qiang Zhang, Wangsheng Chen, Jun Han
Summary: In this study, nickel particles supported on hydrochar were prepared as catalysts for dry reforming of CH4 with CO2 using sugarcane bagasse as carbon sources. The highly dispersed nanoscale Ni particles showed improved catalytic activity and suppressed sintering or carbon deposition during the reaction process. The influence of Ni particle size on the stability of the catalysts was experimentally investigated and smaller Ni particle size was found to be beneficial.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Analytical
Yingying Gu, Guoao Gong, Yuting Jiang, Jiangyang Qin, Yong Mei, Jun Han
Summary: In this study, an electrochemical immunoassay for CA125 detection was developed using nitrogen-doped reduced graphene oxide, carboxylated multi-walled carbon nanotubes, and gold nanoparticles as modifiers. The immunosensor showed excellent electrochemical performance with a wide linear range and low detection limit.
Article
Biochemistry & Molecular Biology
Bo Zhao, Zihan Liu, Zijiang Xiong, Linbo Qin, Wangsheng Chen, Jun Han
Summary: The toxicity of arsenic is closely related to its speciation, and the addition of CaO can inhibit the volatilization of arsenic during coal combustion. Furthermore, there is competition between SO2 and arsenic, with SO2 weakening its volatilization at higher temperatures.
CHEMISTRY AND ECOLOGY
(2022)
Article
Energy & Fuels
Mufang Hu, Bo Zhao, Linbo Qin, Geng Chen, Wangsheng Chen, Jun Han
Summary: The fine particles and trace elements from coal combustion have a severe negative effect on the environment and human health. This study investigated the particle size distribution and trace element release during the combustion of blended coal. The results showed that blending coal can reduce PM formation and lower the emission of As, Se, Pb, and Cd. The reduction efficiency of trace elements varied for different particle sizes. Overall, blending coal combustion can effectively reduce the environmental and health risks.
Article
Chemistry, Physical
Lingtian Kong, Linbo Qin, Bo Zhao, Qijun Yang, Jun Han
Summary: Ni-Cu alloy nanoparticle catalysts were synthesized for dry reforming of methane through one-step hydrothermal method. The addition of Cu into Ni/BC resulted in the formation of Ni-Cu alloy, strengthening electron transfer, smaller Ni particle size, and higher dispersion of Ni particles. Increasing the Ni/Cu ratio from 0 to 7:1 reduced the Ni particle size from 8.56 nm to 6.32 nm. Ni/BC showed CH4 and CO2 conversion rates of 40.21% and 75.90%, respectively, which increased to 89.41% and 97.64% over Ni7Cu(1)/BC. Cu addition inhibited the reverse water gas shift reaction and increased H2/CO from 0.63 (Ni/BC) to 0.96 (Ni7Cu(1)/BC). However, excessive Cu addition suppressed the catalytic activity. TG and TEM analysis indicated no significant graphitic carbon on the used Ni7Cu(1)/BC, and the CH4/CO2 conversion rate was well maintained after 24 hours.
Article
Chemistry, Multidisciplinary
Linbo Qin, Jiuli Li, Ebenezer Nestle Asamoah, Bo Zhao, Wangsheng Chen, Jun Han
Summary: In this study, a new porous carbon material adsorbent was prepared by assembling carbon microspheres inside hollow carbon spheres using a hydrothermal method. The adsorbents were characterized using various techniques. It was found that increasing the glucose concentration promoted the diameter of carbon microspheres, but coarse microspheres could not be loaded into the mesopores or macropores of hollow carbon spheres. The C0.1@HCS adsorbent showed the highest surface area and pore volume, and had a suitable ratio of micropores and mesopores for providing adsorption sites and volatile organic compound diffusion channels.
Article
Thermodynamics
Linbo Qin, Shiquan Zhu, Zhe Xu, Bo Zhao, Wangsheng Chen, Qiang Zhang, Jun Han
Summary: The high temperature of the converter gas at the outlet and its output necessitated the exploration of MW gasification using the converter gas. The feasibility and sensitivity of MW gasification were assessed using Aspen Plus software, and the results were validated with experimental data. The optimal parameters for MW gasification were determined, resulting in a significant decrease in CO2 content and an increase in LHV in the converter gas.
Editorial Material
Engineering, Chemical
Lin He, Jun Han, Erhong Duan
Article
Health Care Sciences & Services
Yin Li, Linbo Qin, Yaobin Shi, Jun Han
Summary: The study found that during the lockdown in Wuhan, most college students exhibited significant fear and anxiety symptoms, with anxiety and fear being the most prominent. Senior students showed higher levels of anxiety compared to freshmen, while psychological symptoms showed no significant differences in gender, residence, and annual income.
Article
Chemistry, Physical
Gang Wang, Yu Wang, Linbo Qin, Bo Zhao, Limin Guo, Jun Han
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Yu Wang, Wangsheng Chen, Bo Zhao, Huaqin Wang, Linbo Qin, Jun Han
