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Adsorption mechanism of Pb(II) and Ni(II) from aqueous solution by TiO2 nanoparticles: kinetics, isotherms and thermodynamic studies
Khan, Shamshad1,2; Zhang Dan1,2; He Haiyan1,2,3
Corresponding AuthorZhang Dan(daniezhang@imde.ac.cn)
2019-07-01
Source PublicationDESALINATION AND WATER TREATMENT
ISSN1944-3994
Volume155Pages:237-249
SubtypeArticle
Contribution Rank1
AbstractIn this work, TiO 2 nanoparticles (TNPs) were used as an absorbent to remove Pb(II) and Ni(II) from aqueous solution. The effect of pH, ionic strength (IS), humic acid (HA), contact time, foreign ions and temperature on the adsorption of Pb(II) and Ni(II) onto TNPs were examined by batch technique. The results showed that the adsorption of Pb(II) and Ni(II) was dominated by outer-sphere surface complexation at pH < 6.0, whereas, inner-sphere surface complexation was the main absorption mechanism at pH > 6.0. The maximum absorption capacity of Pb(II) and Ni(II) onto TNPs calculated from a Langmuir model was 40.00 and 26.32 mg g-1, respectively at 303 K, exhibiting higher efficiency for Pb(II) absorption than Ni(II). The thermodynamic parameters (.H degrees,.S degrees and.G degrees) of Pb(II) and Ni(II) onto TNPs were calculated from the temperature dependent absorption, and their results demonstrated that absorption was endothermic and spontaneous. This analysis demonstrates that the TNPs can be utilized as an appropriate absorbent for the absorption of metal ions from solutions.
KeywordAbsorption Ionic strength TiO2 nanoparticles Heavy-metal ions removal
DOI10.1080/01431161.2019.1577578
Indexed BySCI
WOS KeywordHEAVY-METAL IONS ; AL2O3 NANOPARTICLES ; TITANATE NANOTUBES ; EFFICIENT REMOVAL ; CHELATING RESIN ; BEHAVIOR ; ACID ; PHOTOCATALYSIS ; EQUILIBRIUM ; BIOSORPTION
Language英语
Funding ProjectNational Natural Science Foundation of China[41571315] ; CAS President's International Fellowship Initiative China[2017PCOO59]
WOS Research AreaEngineering ; Water Resources
WOS SubjectEngineering, Chemical ; Water Resources
WOS IDWOS:000470121900025
Funding OrganizationNational Natural Science Foundation of China ; CAS President's International Fellowship Initiative China
PublisherDESALINATION PUBL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26416
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorZhang Dan
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Lab Mt Environm Divers & Control, Chengdu 610041, Sichuan, Peoples R China;
2.Minist Water Conservancy & Power, Chengdu 610041, Sichuan, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Khan, Shamshad,Zhang Dan,He Haiyan. Adsorption mechanism of Pb(II) and Ni(II) from aqueous solution by TiO2 nanoparticles: kinetics, isotherms and thermodynamic studies[J]. DESALINATION AND WATER TREATMENT,2019,155:237-249.
APA Khan, Shamshad,Zhang Dan,&He Haiyan.(2019).Adsorption mechanism of Pb(II) and Ni(II) from aqueous solution by TiO2 nanoparticles: kinetics, isotherms and thermodynamic studies.DESALINATION AND WATER TREATMENT,155,237-249.
MLA Khan, Shamshad,et al."Adsorption mechanism of Pb(II) and Ni(II) from aqueous solution by TiO2 nanoparticles: kinetics, isotherms and thermodynamic studies".DESALINATION AND WATER TREATMENT 155(2019):237-249.
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