Article
Engineering, Environmental
Xinyuan Zhan, Gunvor Marie Kirkelund
Summary: The study explored the use of electrodialytic remediation (ED) as a pre-treatment to remove heavy metals from MSWI fly ash before geopolymerization. The pre-treatment increased the reactivity of Si and Si/Al ratio in fly ash. A mixture of 80% coal fly ash and 20% ED treated fly ash with 8 M NaOH was found to have optimal compressive strength in geopolymerization.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Chengcheng Fan, Baomin Wang, Hongmei Ai, Yi Qi, Ze Liu
Summary: The study found that using coal fly ash-based geopolymer for MSWI fly ash S/S treatment performed better than Portland cement, with higher compressive strength and higher immobilization rates for heavy metals.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Xinyuan Zhan, Yan Wang, Li'ao Wang, Chenxuan Li, Xiaowei Xu, Rui Deng
Summary: Municipal solid waste incineration (MSWI) fly ash and electrolytic manganese residue were used to produce lightweight ceramisite by mixing with coal fly ash. The migration, transformation, and stabilization/solidification mechanism of heavy metals during the ceramisite formation process were investigated. Heavy metals in ceramisite pellets were concentrated and transported among solids below 710 degrees Celsius, and then released into the flue gas as chlorides above 710 degrees Celsius, particularly for Pb, Cd, and Cu. The generation of heavy metal chlorides depended on the presence of silicon oxide and aluminum oxide, resulting in a higher volatilization rate of copper compared to Mn, Zn, and Cr. Remaining heavy metals such as Cu, Zn, and Cr in the solid phase were prone to ion exchange, balance charge, and specific adsorption with calcium-bearing minerals in ceramisite at 1160 degrees Celsius based on mineral analysis and principle component analysis.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Energy & Fuels
Shuping Pan, Qi Yao, Wenxiang Cai, Yaqi Peng, Yuhao Luo, Zhizhen Wang, Caiping Jiang, Xiaodong Li, Shengyong Lu
Summary: This study collected 12 fly ash samples from 9 grate power plants in southeastern China and determined their PCDD/Fs and heavy metal concentrations, comparing them to previous data. The results showed that the PCDD/Fs concentration in fly ash ranged from 0.002-0.051 ngI-TEQ/g, with an average of 0.027 ngI-TEQ/g. The study also identified a strong correlation between toxicity and specific PCDDs. Additionally, the heavy metal Pb was found to pose a significant environmental risk.
Article
Environmental Sciences
Xinyuan Zhan, Li'ao Wang, Lei Wang, Jian Gong, Xiang Wang, Xue Song, Tengtun Xu
Summary: The study discussed the co-recycling of MSWI fly ash, electrolytic manganese residue, and other materials to produce lightweight ceramisites, determining the optimal mixture and sintering conditions. It also explored the volatilization rates and residual fractions of heavy metals in the ceramisites, providing a feasible method for producing green lightweight aggregates.
Article
Engineering, Environmental
Chengcheng Fan, Baomin Wang, Yi Qi, Ze Liu
Summary: A novel binder system using MgO and silica fume was developed for solidification/stabilization of MSWI fly ash. The blend showed good compressive strength and controlled leaching behavior of heavy metals, providing a promising method for immobilization of heavy metals in MSWI fly ash.
Article
Engineering, Environmental
Yunmei Wei, Sijie Liu, Ruixuan Yao, Shuang Chen, Junmin Gao, Takayuki Shimaoka
Summary: Municipal solid waste incineration fly ash requires effective pretreatment before recycling. Water washing and CO2-aided washing are effective methods that significantly enhance the recycling potential of the ash.
Article
Environmental Sciences
Xiang Tian, Feng Rao, Chuanxi Li, Wei Ge, Noemi Ortiz Lara, Shaoxian Song, Ling Xia
Summary: The study demonstrates that the addition of waste glass effectively strengthens Municipal Solid Waste Incineration (MSWI) fly ash and immobilizes the heavy metals within it. Experimental results show that the immobilization efficiency of chromium increases with the addition of waste glass, while the efficiency of copper, lead, zinc, and cadmium depends on the final pH of the eluant.
Article
Environmental Sciences
Huan Wang, Bing Zhao, Fenfen Zhu, Qian Chen, Tiantian Zhou, Yiyu Wang
Summary: This study investigated the removal effect of chlorine in municipal solid waste incineration (MSWI) fly ash through water washing, lactic acid, citric acid, and microwave treatment. XANES analysis was used to determine the chemical form of chlorine in fly ash, and heavy metals in fly ash were also examined. The results showed that double washing and triple washing could remove 88.0% and 95.5% of chlorine, respectively. The combination of double water washing with microwave or organic acid could remove about 96.6% of chlorine and a significant amount of insoluble chloride. Microwave treatment effectively stabilized heavy metals, while citric acid eluted heavy metals. The findings of this study provide guidance for pretreating fly ash before resource utilization.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Construction & Building Technology
Jun Liu, Guangming Xie, Zhengdong Wang, Canrong Zeng, Xu Fan, Zhenlin Li, Jie Ren, Feng Xing, Weizhuo Zhang
Summary: A new method of co-treatment of municipal solid waste incineration fly ash (MSWIFA) and municipal solid waste incineration bottom ash (MSWIBA) was proposed in this study. An alkali-activated binder was synthesized from MSWIFA and MSIWBA by Ca/Si ratio design. The results showed that a low concentration of alkali favors the development of compressive strength when more MSWIFA is used, while a high concentration of alkali is required in the MSWIBA-based binder system. Leaching tests demonstrated the effective immobilization of heavy metals, with their leaching concentrations below the relevant Chinese standards.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Environmental Sciences
Chengcheng Fan, Baomin Wang, Hongmei Ai, Ze Liu
Summary: Fluidized bed and grate furnace are commonly used technologies in municipal solid waste incineration, with MSWI fly ash consisting of calcium and chlorine salts, showing potential pozzolanic activity. Grate furnace MSWI fly ash contains higher levels of heavy metals and chlorides, posing greater environmental risks.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Shejiang Liu, Chen Miao, Shanshan Yao, Hui Ding, Kai Zhang
Summary: The study evaluated the reaction mechanism and remediation effect of water-soluble thiourea formaldehyde resin with heavy metals, demonstrating its excellent performance in remediating Cd-contaminated soil. After using WTF resin to remediate the soil, the proportion of Cd in the residual state significantly increased, indicating that the resin is harmless to soil health.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Civil
Giedrius Girskas, Olga Kizinievic, Viktor Kizinievic
Summary: The research found that fly ash (FA) affects the rheological characteristics and frost durability of cement pastes, but adding up to 10% of FA does not impair compressive strength. Moreover, utilization of FA in cement composites can improve their durability properties.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Zhiwen Xu, Zhiyuan Liang, Huaishuang Shao, Qinxin Zhao
Summary: The hazardous waste of municipal solid waste incineration (MSWI) fly ash, which contains dioxins and leachable heavy metals, can be effectively stabilized and reused through microwave hydrothermal treatment with common additives such as Na2S, Na2SiO3, Na2B4O7, or H3BO3. The influence of additive-assisted microwave hydrothermal on heavy metals stabilization was studied at different temperatures, L/S ratios, time, and additive concentrations. The results showed that microwave hydrothermal with Na2S could enhance heavy metals stabilizing by forming zeolites for adsorption, precipitation, and converting heavy metals to a more stable state. This method greatly reduces reaction time and promotes waste utilization.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Environmental
Yingying Shao, Yanqiu Shao, Weiyi Zhang, Ying Zhu, Ting Dou, Leizhe Chu, Zhendong Liu
Summary: In this study, ceramsite was prepared using MSWI fly ash, civil sludge, and contaminated soil as raw materials. The optimal preparation conditions were determined and the immobilization mechanisms of heavy metals were explored. The obtained ceramsite showed excellent performance parameters and the leaching of heavy metals was much lower than the standard. Therefore, the reuse of MSWI fly ash is an effective method for reducing solid wastes.
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)