Removal of Mn2+ in geothermal water by manganese sand: process and mechanisms

doi:10.1144/geochem2021-07I

	Removal of Mn2+ in geothermal water by manganese sand: process and mechanisms
	Feng, Wenchao 1,2,3; Wu, Jun 4; Lu, Jian1,2,3,5
发表期刊	GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
ISSN	1467-7873
	2022-05-01
卷号	22 期号:2 页码:9
关键词	geothermal water Mn-2(+) adsorption kinetics adsorption thermodynamic adsorption equilibriums
DOI	10.1144/geochem2021-07I
通讯作者	Lu, Jian([email protected])
英文摘要	Geothermal water resources are being exploited widely in many areas to relieve pressure on water resources generally. Excessive Mn-2(+) concentration in geothermal water will seriously reduce its utilization rate. Therefore, this study investigated the removal of Mn-2(+) from simulated geothermal water by manganese sand. The Mn-2(+) removal rate from simulated water with a concentration of 10 mg l(-1) by 2 g manganese sand at 298, 323, 343 and 363 K was more than 90%. The removal efficiency of Mn-2(+) is influenced by adsorbent dosage, adsorbent particle size, initial Mn-2(+) concentration and competing ions, and less so by a pH of 5-9. A pseudo-first-order kinetic model fits the adsorption data better than a pseudo-second-order model. The pseudo-first-order adsorption rate constants (K-1) ranged from 0.14 to 0.5 h(-1) as the temperature increased from 298 to 363 K. The Langmuir isotherm model fits the adsorption data better than the Freundlich and Temkin isotherm models. The maximum monolayer adsorption capacities (q(m)) obtained by the Langmuir isotherm model fitting were 0.91/1.02/1.22/1.23 mg g(-1) at 298/323/343/363 K. Thermodynamic studies revealed that the adsorption was endothermic and physical in nature. These findings suggest that the potential of manganese sand for removing Mn-2(+) in geothermal water is considerable.
资助机构	National Natural Science Foundation of China ; Taishan Scholars Program of Shandong Province ; Science and Technology Service Network Initiative of the Chinese Academy of Sciences ; Two-Hundred Talents Plan of Yantai
收录类别	SCI
语种	英语
关键词[WOS]	LOW-TEMPERATURE ; HEAVY-METALS ; ADSORPTION ; KINETICS ; RISKS ; IRON ; ASH
研究领域[WOS]	Geochemistry & Geophysics
WOS记录号	WOS:000765820700001
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/37714
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
通讯作者	Lu, Jian
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China 2.YICCAS, Shandong Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Harbin Engn Univ, Yantai Res Inst, Yantai 264006, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Megasci, 7 Nanhai Rd, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Feng, Wenchao,Wu, Jun,Lu, Jian. Removal of Mn2+ in geothermal water by manganese sand: process and mechanisms[J]. GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS,2022,22(2):9.
APA	Feng, Wenchao,Wu, Jun,&Lu, Jian.(2022).Removal of Mn2+ in geothermal water by manganese sand: process and mechanisms.GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS,22(2),9.
MLA	Feng, Wenchao,et al."Removal of Mn2+ in geothermal water by manganese sand: process and mechanisms".GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS 22.2(2022):9.