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

文献类型：期刊论文

作者Feng, Wenchao1,2,5; Wu, Jun4; Lu, Jian1,2,3,5
刊名GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
出版日期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
ISSN号1467-7873
DOI10.1144/geochem2021-07I
通讯作者Lu, Jian(jlu@yic.ac.cn)
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.
WOS关键词LOW-TEMPERATURE ; HEAVY-METALS ; ADSORPTION ; KINETICS ; RISKS ; IRON ; ASH
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000765820700001
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
源URL[http://ir.yic.ac.cn/handle/133337/37713]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_近岸生态与环境实验室
通讯作者Lu, Jian
作者单位1.YICCAS, Shandong Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Megasci, 7 Nanhai Rd, Qingdao 266071, Peoples R China
4.Harbin Engn Univ, Yantai Res Inst, Yantai 264006, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, 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.

入库方式： OAI收割

来源：烟台海岸带研究所

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