Green and Smart Mining Engineering最新文献

Highly efficient CO2 capture on acid-treated sepiolite impregnated with mixed polyethyleneimine and diethanolamine 用混合聚乙烯亚胺和二乙醇胺浸渍的酸处理海泡石高效捕集CO2

Green and Smart Mining Engineering Pub Date : 2024-11-30 DOI: 10.1016/j.gsme.2024.11.002

Chenguang Qian, Zhicheng Wang, Yi Wen, Yixuan Mao, Chunquan Li, Yuan Fang, Zhiming Sun

{"title":"Highly efficient CO2 capture on acid-treated sepiolite impregnated with mixed polyethyleneimine and diethanolamine","authors":"Chenguang Qian, Zhicheng Wang, Yi Wen, Yixuan Mao, Chunquan Li, Yuan Fang, Zhiming Sun","doi":"10.1016/j.gsme.2024.11.002","DOIUrl":"https://doi.org/10.1016/j.gsme.2024.11.002","url":null,"abstract":"Amine-functionalized solid adsorbents exhibit broad prospects in CO 2 capture from flue gases due to their high adsorption capacity and selectivity. However, reported adsorbents are still facing challenges, including high costs, the easy agglomeration of polyamines, and limited adsorption temperature ranges. In this study, sepiolite-based mixed amine adsorbents are prepared by synergistically impregnating acid-treated sepiolite with a mixture of polyethyleneimine (PEI) and diethanolamine (DEA). Results show that at a PEI/DEA loading ratio of 1:1 and a mixture loading of 60wt%, the CO 2 adsorption capacity of the resulting adsorbent increases from 0.58 mmol/g for acid-treated sepiolite to 2.89 mmol/g at 60 °C, and remains above 2.50 mmol/g after 10 cycles. Meanwhile, the optimized adsorbent maintains a capacity of over 2.44 mmol/g within the temperature range of 30–70 °C. Additionally, the CO 2 selectivity and maximum heat of adsorption for the optimized adsorbent are calculated to be 1184 and 60.08 kJ/mol, respectively. An improved CO 2 adsorption capacity is obtained, an increase from 0.052 mmol/g for acid-treated sepiolite to 1.60 mmol/g. Furthermore, an in-situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) analysis reveals that the introduction of DEA into PEI helps in polyamine dispersion, thereby enhancing CO 2 adsorption capacity. The CO 2 capture mechanism follows a zwitterionic reaction, where CO 2 is ultimately converted into carbamate and carbamic acid. Overall, the as-prepared sepiolite-based mixed amine adsorbents, which are characterized by high CO 2 adsorption capacity and selectivity, low cost, broad adsorption temperature range, moderate heat of adsorption, and good cycle stability, show promising potential for industrial applications.","PeriodicalId":518909,"journal":{"name":"Green and Smart Mining Engineering","volume":"1 4","pages":"363-374"},"PeriodicalIF":0.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147888141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Reverse cationic flotation of low-grade phosphate ore using quaternary ammonium salt as a collector and its adsorption mechanism 低品位磷矿季铵盐捕收剂反阳离子浮选及其吸附机理研究

Green and Smart Mining Engineering Pub Date : 2024-09-01 DOI: 10.1016/j.gsme.2024.08.007

Wei Xu, Guangjun Mei, Yan Tian, Bo Shi, Can Guo, Weixiao Pan

{"title":"Reverse cationic flotation of low-grade phosphate ore using quaternary ammonium salt as a collector and its adsorption mechanism","authors":"Wei Xu, Guangjun Mei, Yan Tian, Bo Shi, Can Guo, Weixiao Pan","doi":"10.1016/j.gsme.2024.08.007","DOIUrl":"https://doi.org/10.1016/j.gsme.2024.08.007","url":null,"abstract":"A novel quaternary ammonium salt collector, LH-01, was employed for the reverse cationic flotation of a magnesium-depleted concentrate (P 2 O 5 grade of 19.72wt%, SiO 2 content of 44.26wt%). We achieved an outstanding phosphate concentrate with a P 2 O 5 grade of 35.16wt%, a SiO 2 content of 6.06wt%, and a P 2 O 5 recovery of 75.88%. This process was accomplished through two sequential reverse cationic flotation processes designed for quartz removal. Importantly, the quartz removal by LH-01 reached 94.17%, far superior to that by dodecyltrimethylammonium chloride, achieving highly selective separation of quartz and apatite. To understand the adsorption mechanism and kinetics of the collector LH-01 on quartz and apatite surfaces, various techniques, such as quartz crystal microbalance with dissipation, atomic force microscopy, and X-ray photoelectron spectroscopy, were employed. Results revealed that the adsorption layer of LH-01 on the apatite surface was thin and rigid, with a significantly lower hydrophobic effect than that of the viscoelastic multiple adsorption layer formed by LH-01 on the quartz surface. This disparity was identified as the primary factor contributing to the selective flotation separation of apatite and quartz. Moreover, the adsorption of LH-01 on the quartz surface was the result of multiple forces, including electrostatic adsorption, multiple-hydrogen-bond adsorption, and intermolecular hydrophobic association.","PeriodicalId":518909,"journal":{"name":"Green and Smart Mining Engineering","volume":"1 3","pages":"322-335"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147920377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 26

Identifying mining-induced chromium contamination in soil through visible-near infrared spectroscopy and machine learning 通过可见光-近红外光谱和机器学习识别采矿引起的土壤铬污染

Green and Smart Mining Engineering Pub Date : 2024-06-01 DOI: 10.1016/j.gsme.2024.05.001

Chongchong Qi, Mengting Wu, Kechao Li, Tao Hu, D. J. Armaghani, Qiusong Chen, Erol Yilmaz

引用次数: 0

Potential and future direction for copper resource exploration in China 中国铜资源勘探的潜力和未来方向

Green and Smart Mining Engineering Pub Date : 2024-06-01 DOI: 10.1016/j.gsme.2024.06.001

Juxing Tang, Huanhuan Yang, Hongjin Chen, Faqiao Li, Chengyang Wang, Qingping Liu, Qi Zhang, Rongkun Zhang, Lirui Yu

引用次数: 0

Research advancement of efficient flotation separation technologies for magnesium-containing minerals 含镁矿物高效浮选分离技术的研究进展

Green and Smart Mining Engineering Pub Date : 2024-06-01 DOI: 10.1016/j.gsme.2024.05.003

Jin Yao, Xiaoqi Ban, Yu Xie, Wanzhong Yin, Yu-lian Wang, Feijia Xue

引用次数: 0

Selective extraction of lithium from shale gas produced water using an aluminum-based adsorbent 使用铝基吸附剂从页岩气产水中选择性提取锂

Green and Smart Mining Engineering Pub Date : 2024-06-01 DOI: 10.1016/j.gsme.2024.05.002

Yanan Pan, Bin Ji, Wencai Zhang, Yang Xia, Qi Li, Bhavin Rena

引用次数: 0

Efficient flotation separation of lead–zinc oxide ores using mineral sulfidation reconstruction technology: A review 利用矿物硫化重建技术高效浮选分离铅锌氧化物矿石：综述

Green and Smart Mining Engineering Pub Date : 2024-06-01 DOI: 10.1016/j.gsme.2024.05.004

Yuangan Chen, Yong-sheng Sun, Yuexin Han

引用次数: 0

Green Mining, Smart Future 绿色矿业，智慧未来

Green and Smart Mining Engineering Pub Date : 2024-04-01 DOI: 10.1016/j.gsme.2024.04.001

Meifeng Cai, Emmanuel Detournay

引用次数: 0

Review of allanite: properties, occurrence and mineral processing technologies 奥氏体综述：性质、存在和矿物加工技术

Green and Smart Mining Engineering Pub Date : 2024-04-01 DOI: 10.1016/j.gsme.2024.04.004

Zhong Xiao, Wencai Zhang

引用次数: 0

Key theory and technology of cemented paste backfill for green mining of metal mines 金属矿山绿色开采水泥浆回填关键理论与技术

Green and Smart Mining Engineering Pub Date : 2024-04-01 DOI: 10.1016/j.gsme.2024.04.003

Aixiang Wu, Yong Wang, Z. Ruan, Bolin Xiao, Jiandong Wang, Linqi Wang

引用次数: 0