An integrated approach combines hydrothermal chemical and biological treatment to enhance recycle of rare metals from coal fly ash

doi:10.1016/j.cej.2020.124640

	An integrated approach combines hydrothermal chemical and biological treatment to enhance recycle of rare metals from coal fly ash
	Su, HaiFeng 2,3; Tan, Furong 1; Lin, JiaFu 4
刊名	CHEMICAL ENGINEERING JOURNAL
	2020-09-01
卷号	395 页码:13
关键词	Coal fly ash Rare metals Acidithiobacillus thiooxidans Hydrothermal chemical treatment Microbial leaching
ISSN号	1385-8947
DOI	10.1016/j.cej.2020.124640
通讯作者	Lin, JiaFu(linjiafu@cdu.edu.cn)
英文摘要	Coal fly ash rich in rare metals accounts for a large amount of solid waste released from coal-fired power plants. However, rare metals, the components of coal fly ash with the highest economic value, are not fully recycled due to the lack of an effective, low-cost approach. Therefore, it is urgent to develop a new approach, aiming at increasing the recycling efficient, decreasing the cost and strengthening the high economic value of fly ash. Here, we developed an integrated approach combines hydrothermal chemical treatment process (HTCP) and biological leaching process (BLP) to improve recycle of rare metals from coal fly ash. The results showed that the one-step bioleaching method could obtain more kinds of rare metals and dramatically improve bioleaching rate after hydrothermal-alkali treatment (HAKT) using Acidithiobacillus thiooxidans. After HAKT, the leaching rates of metals V, Sr, Y, La, and Ce were higher than those of the untreated pure fly ash (UPFA) with the maximum values of 51%, 70.52%, 37.48%, 64.77%, and 76.37%, respectively; after hydrothermal-acid treatment (HTAT), the bioleaching rates of rare metals Ni, Sr, and Y, were higher than those of the UPFA with the maximum values of 70.24%, 20.26%, and 34.54% respectively. The results also showed that, for most rare metals, the recovery rate following HAKT was higher than that following HTAT. This result can be demonstrated via analyzing adsorption quantity, adsorption kinetics and diffusion model of fly ashes for A.thiooxidans. Our study provides an important pathway for recycling rare metals from coal fly ash.
资助项目	earmarked fund for the Open Project Program of the State Key Laboratory of Petroleum Pollution Control[PPC2017004] ; CNPC Research Institute of Safety and Environmental Technology ; National Natural Science Foundation and frontier research program of Chongqing[cstc2017jcyjA02138] ; Chongqing Science Committee ; Key laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural and Resources[SXDJ2019]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000537388500002
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/11187]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Lin, JiaFu
作者单位	1.Minist Agr, Biogas Inst, Chengdu 610041, Sichuan, Peoples R China 2.Chengdu Univ, Inst Adv Study, Chengdu, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, 266 Fangzheng Ave,Shuitu High Tech Pk, Chongqing 400714, Peoples R China 4.Chengdu Univ, Sichuan Ind Inst Antibiot, Antibiot Res & Reevaluat Key Lab Sichuan Prov, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Su, HaiFeng,Tan, Furong,Lin, JiaFu. An integrated approach combines hydrothermal chemical and biological treatment to enhance recycle of rare metals from coal fly ash[J]. CHEMICAL ENGINEERING JOURNAL,2020,395:13.
APA	Su, HaiFeng,Tan, Furong,&Lin, JiaFu.(2020).An integrated approach combines hydrothermal chemical and biological treatment to enhance recycle of rare metals from coal fly ash.CHEMICAL ENGINEERING JOURNAL,395,13.
MLA	Su, HaiFeng,et al."An integrated approach combines hydrothermal chemical and biological treatment to enhance recycle of rare metals from coal fly ash".CHEMICAL ENGINEERING JOURNAL 395(2020):13.