Review
Engineering, Environmental
Che-Jung Hsu, John D. Atkinson, Adrienne Chung, Hsing-Cheng Hsi
Summary: Studies have shown that Hg-0 re-emission is influenced by various factors and can be restricted through the addition of inhibitors. This review summarizes the mechanisms of Hg-0 re-emission, updates misconceptions, and reviews the application of inhibitors.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Jianguo Hong, Xinqing Zou, Ziqiang Qin, Bin Zhou, Shuhua Geng, Yuwen Zhang, Xingli Zou, Xionggang Lu
Summary: The effect of carbon dioxide (CO2) on the desulfurization of sintering flue gas with hydrate (Ca(OH)(2)) as an absorbent was investigated. The formation of calcium carbonate (CaCO3) and its effect on the desulfurization were discussed. The experimental research evaluated the impacts of temperature, humidity, and CO2 concentration on the desulfurization of Ca(OH)(2).
Article
Engineering, Environmental
Sila Kiziltas Demir, Nurcan Tugrul
Summary: This study produced an alternative cost-effective adsorbent for the removal of zinc and cadmium from wastewater using hydroxyapatite synthesized from FGD waste generated by coal power plants. The results showed that FGD waste is an effective source for synthesis of HAP, which exhibits high adsorption capacity for heavy metal removal.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Guanyi Chen, Kexuan Han, Caixia Liu, Beibei Yan
Summary: A novel process of electrokinetic treatment combined with chemical pretreatment of heavy metals in FGD-WWS was proposed to improve the removal efficiency. Different pretreatment agents were found to have varying effects on the efficiency, with a focus on fraction transformation as an effective way to enhance the removal efficiency. Factors such as electric field, pH, and pretreatment agents were identified as main factors affecting the transformation potential and removal efficiency of heavy metals.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xiaofang Ye, Xiaodan Zhao, Qiang Ming, Jun Zhu, Jiaming Guo, Dongqi Sun, Sheng Zhang, Jie Xu, Zhen Zhou
Summary: This study investigated the effects of various factors on maximizing the aluminum utilization rate for chlorin removal from flue gas desulfurization wastewater. By optimizing the reaction conditions, the treatment cost of Friedel's salt precipitation method was reduced by 30.5%, making the two-stage desalination process more feasible and worth popularizing.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Chemical
Zhen Zhou, Maonan Zhang, Qing Xia, Xiaodan Zhao, Qiang Ming, Li Zeng
Summary: This study compares the treatment effect and fouling property of the NF-ED hybrid system and single ED system for flue gas desulfurization wastewater treatment. The optimal operation conditions of the ED and NF process are determined, and the fouling properties of NF membranes and IEMs are explored. The economic impact of membrane fouling is calculated in detail, and the total operating cost for the NF-ED system is found to be 35.9% more expensive than the single ED system.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Qiuming Wang, Walter Wilfong, Brain Kail, Tuo Ji, Fan Shi, McMahan Gray
Summary: In this study, a water stable polyethylenimine-n,n'-methylenebisacrylamide (PEI-MBAA) functionalized SiO2 solid sorbent material was developed for the removal of heavy metal pollutants from flue gas desulfurization (FGD) wastewater. The material exhibited excellent metal adsorption kinetics, selectivity, regenerability, and space velocity. The results showed high adsorption efficiency for trace-level heavy metals in authentic industrial FGD wastewater and good reusability after five consecutive adsorption-desorption cycles. This sorbent is a promising candidate for the removal of heavy metals from practical aqueous solutions.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Environmental Sciences
Yumei Mao, Xiaoping Li
Summary: The study aims to explore the desalting effect of flue gas desulfurization gypsum (FGDG) on coastal saline-sodic soils and evaluate changes in soil chemical properties, plant growth, and heavy metal contents. The experiments showed that FGDG effectively improved the chemical properties of saline-sodic soils and achieved desalting effects within 1 year. Different soil textures responded differently to FGDG application.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Green & Sustainable Science & Technology
Tong Li, Ting Su, Jiang Wang, Suiyi Zhu, Yuxin Zhang, Zhi Geng, Xianze Wang, Yidi Gao
Summary: A facile low-temperature thermal route was developed to treat the acidic and highly saline flue gas wastewater concentrate generated from desulfurization wastewater in power/heating plants. The method effectively removed sulfate and nitrate from the concentrate without generating any hazardous waste, and produced recycled water and value-added natroalunite particles.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Bang Li, Yanbin Yun, Guicheng Liu, Chunli Li, Xinyang Li, Muhammad Hilal, Woochul Yang, Manxiang Wang
Summary: The study found that softening pre-treatment can effectively improve the water reclamation performance of FGDW direct contact membrane distillation and reduce membrane fouling. The pre-treatment can efficiently remove heavy ions and prevent membrane fouling, achieving high salt and organic matter rejection rates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Xingyu Chen, Tianxin Li, Xiaomin Dou, Linglong Meng, Shuiyang Xu
Summary: Flue gas desulfurization (FGD) wastewater treatment is of increasing interest due to the release of stringent standards for pollution emissions in the energy industry and growing concerns about water scarcity. This study developed a treatment system combining reverse osmosis (RO) membrane and ultrasonic cleaning, which improved membrane fouling cleaning efficiency and extended membrane lifespan. The system's effluent met the standard for desulfurization wastewater treatment.
Article
Green & Sustainable Science & Technology
Jing Wang, Aiqin Zhao, Fei Ma, Jili Liu, Guoju Xiao, Xing Xu
Summary: This paper evaluates the changes in soil salinity, alkalinity, crop yield, and other physicochemical properties after reclamation and planting with FGD gypsum over four years. The results show that FGD gypsum improves soil conditions and increases crop yields, especially when combined with humic acid or fertilizer.
Article
Environmental Sciences
Hao Zhou, Lingxiao Zhan, Heng Chen, Linjun Yang
Summary: This study conducted experiments on low-temperature flue gas concentration in a laboratory setting and found that the ion concentrations of wastewater do not increase linearly due to complex interactions between ions. Additionally, the size of precipitated products increased during concentration, possibly due to aggregation effects. The study also investigated the risk of corrosion and found that the concentrated desulfurization wastewater had a strong pitting effect on carbon steel but showed excellent corrosion resistance on stainless steel.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Maonan Zhang, Qing Xia, Xiaodan Zhao, Jiaming Guo, Li Zeng, Zhen Zhou
Summary: The concentration effects of Ca2+ on APAM fouling were systematically investigated. The results showed that Ca2+ could alleviate APAM fouling and change the structure of the fouled layer. The study provides new insights into the concentration effects of Ca2+ on polymer fouling of membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yanni Xuan, Haitao Gao, Hong Tian, Zhangmao Hu, Jingjing Ma, Qingbo Yu
Summary: Ce-modified Mn3O4/diatomite sorbents with different Ce/Mn molar ratios were prepared by the sol-gel method to improve the desulfurization performance of single Mn-based sorbents. Results showed that the addition of CeO2 significantly enhanced the desulfurization activity by forming strong redox couples with Mn3O4. The designed CeO2-Mn3O4 binary oxides with a micro-reticulated framework restrained the agglomeration of active component and provided more active sites, leading to improved utilization of active component.
CHEMICAL ENGINEERING JOURNAL
(2023)