Article
Environmental Sciences
Zhishui Liang, Qi Gao, Zhiren Wu, Haiying Gao
Summary: The zeolite synthesized from coal gangue has shown a remarkable adsorption effect on Cd2+ and Cu2+ in wastewater, achieving a removal efficiency of over 90%. The Langmuir model was found to be the most suitable for describing the adsorption process. The adsorption mechanism involves both liquid diffusion and intraparticle diffusion, with physical adsorption and ion exchange being the main mechanisms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Yuxuan Jin, Ze Liu, Le Han, Yanbo Zhang, Li Li, Siyu Zhu, Zhonghao Peng Jiaxing Li, Dongmin Wang
Summary: A novel coal-analcime composite adsorbent was successfully synthesized from coal gangue, enhancing the adsorption capacity of analcime for heavy metal ions. The modified coal loaded on the surface of analcime significantly improved the chemo-adsorption between heavy metal ions and the composite, with a maximum Pb2+ exchange capacity of 268 mg/g achieved.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Weihua Peng, Yingying Liu, Manli Lin, Yan Liu, Cheng Zhu, Linhua Sun, Herong Gui
Summary: The study found that heavy metal concentrations in leachates from coal fly ash and coal gangue were low, but still inhibited the survival and reproduction of Daphnia magna. The toxicity of the leachates to D. magna was influenced by the chemical composition of the leachates and the properties of the coal fly ash and coal gangue.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Haobo Bi, Zhanshi Ni, Junjian Tian, Chengxin Wang, Chunlong Jiang, Wenliang Zhou, Lin Bao, Hao Sun, Qizhao Lin
Summary: This paper studies the effects of biomass on the combustion characteristics, combustion products, and combustion reaction model of coal gangue. A multi-component combustion reaction model for coal gangue and biomass is established based on thermogravimetric experimental data. The addition of biomass is found to promote the combustion reaction of coal gangue and the production of gas products. Different combustion reaction models provide better explanations for different combustion processes.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Physical
Hao Zhang, Rongbo Zhao, Zhiliang Liu, Xiangchao Zhang, Chunfang Du
Summary: In this study, ammonium phosphotungstate/kaolinite-rich coal gangue (NH4-PW/CG) adsorbents were synthesized for the removal of ciprofloxacin (CIP). The presence of kaolinite-rich CG significantly enhanced the adsorption efficiency of NH4-PW/CG, providing an efficient adsorbent for the comprehensive utilization of kaolinite-rich CG and removal of positively charged pollutants.
APPLIED CLAY SCIENCE
(2023)
Article
Environmental Sciences
Ling Long, Yimeng Zhao, Guojun Lv, Yin Duan, Xiaobo Liu, Xuguang Jiang
Summary: This study investigated an innovative and improved method for stabilization/solidification (S/S) of municipal solid waste incineration fly ash (MSWI FA) using coal gangue based geopolymer with the addition of active calcium content. The results showed that the addition of calcium oxide significantly increased compressive strength and achieved the highest immobilization efficiencies of heavy metals. Various analytical techniques were used to confirm the formation of calcium-containing hydration products after the improvement of calcium content in the binder. The study demonstrated that the incorporation of active calcium content can efficiently improve the S/S treatment of hazardous ash waste such as MSWI FA.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Kezhou Yan, Jiyuan Zhang, Dandan Liu, Xiang Meng, Yanxia Guo, Fangqin Cheng
Summary: A feasible method for synthesizing magnetic zeolite from industrial solid wastes (red mud and coal gangue) was proposed. The preparation conditions, formation mechanism, and adsorption performance of the magnetic zeolite were investigated. The prepared magnetic zeolite showed excellent adsorption capacity and reusability for heavy metals.
Article
Construction & Building Technology
Zhongtao Luo, Jinyang Guo, Xiaohai Liu, Yuandong Mu, Meixiang Zhang, Meng Zhang, Chongfei Tian, Jiahui Ou, Jie Mi
Summary: This study investigated the feasibility of using a combination of lead-zinc tailings and coal gangue to produce ceramsite, achieving the solidification of heavy metals. The results showed that ceramsite can be prepared using lead-zinc tailings and coal gangue when the lead-zinc tailings content is less than 30%, and the prepared ceramsite meets the requirements of environmental safety.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Chao-qiang Wang, Ding-yi Duan, De-ming Huang, Qiao Chen, Min-jie Tu, Kai Wu, Dan Wang
Summary: This study systematically investigated the physical and chemical properties of coal gangue and municipal sludge, assessed the risks they pose to the environment and human health, and explored the feasibility of using them for ceramsite preparation. The experimental results showed that under certain conditions, the ceramsite made from coal gangue and municipal sludge can meet the relevant standards and is environmentally safe.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Yingbo Dong, Huan Lu, Hai Lin
Summary: This study investigated the effects of HS-CG particle size, leaching solution pH, Fe3+ and acidophilic microorganisms on the release of HMs. The results showed that smaller particle size and more acidic solution resulted in higher release of HMs. The addition of Fe3+ as a catalyst enhanced the release of HMs, but high concentrations of Fe3+ decreased the release.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Xingyu Ding, Xin Teng, Zhuxin She, Yi Li, Yuanyuan Liu, Ying Zhuang, Chaochao Wang
Summary: The content of heavy metals is an important indicator for assessing the quality and safety of salt. A new solid-phase extraction (SPE) material was designed in this study to remove and determine Pb(ii) from salt samples. The synthesized SPE fillers showed excellent adsorption performance for Pb(ii) at optimal salt concentrations, while also effectively removing Na(i) interference.
Article
Energy & Fuels
Jiangze Luo, Hucheng Yi, Jianqiao Wang, Zhuozhi Wang, Boxiong Shen, Jie Xu, Lijun Liu, Qiqi Shi, Chao Huang
Summary: This paper investigated the effect and mechanisms of alkaline metals on the adsorption of heavy metals by kaolinite. The results showed that the addition of NaCl decreased the fixation rate of Pb, and the addition of Na2CO3 gradually decreased the fixation rates of all heavy metals, while the addition of CaO had little effect. The alkaline metals also increased the leaching risk of heavy metals from the ash. DFT calculations revealed the inhibitory effect of NaCl and Na2O on the adsorption of heavy metals, while effective adsorption was still feasible after the combination of CaO and metakaolin.
Article
Environmental Sciences
Hongyu Gao, Chao Linghu, Di Su, Yu Zheng, Zhenzhen Song, Fangqin Cheng
Summary: This study comprehensively analyzed the influence of the freeze-thaw process on the performance of CGEr and the environmental risk of heavy metals. The results showed that the freeze-thaw process reduced the performance of CGEr and reduced the ecological risk of heavy metals. The study also found that the freeze-thaw process destroyed the pore structure of the material and affected the occurrence form of heavy metals, thus reducing the potential ecological risk of the material.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Min Chen, Ying Liu, Di Zhang, Jianming Zhu, Xiaoyang Chen, Liang Yuan
Summary: The study showed that iron oxyhydroxide and iron oxyhydroxide sulfate-modified coal gangue can effectively reduce the available arsenic concentration in paddy soils, alter the geochemical fraction and valence state of arsenic, and aid in immobilizing arsenic in paddy soils under flooded conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
B. Chilikwazi, J. M. Onyari, J. M. Wanjohi
Summary: This study investigated the levels of heavy metals in coal gangue and coal from Sinazongwe District, Zambia. The concentrations of heavy metals were generally within safe limits, except for elevated levels of Pb in coal gangue.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
