干旱区生态环境知识资源中心(Arid): Calligonum Crinitum as a Novel Sorbent for Sorption of Pb(II) from Aqueous Solutions: Thermodynamics, Kinetics, and Isotherms

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DOI	10.1007/s10924-020-01975-6
	Calligonum Crinitum as a Novel Sorbent for Sorption of Pb(II) from Aqueous Solutions: Thermodynamics, Kinetics, and Isotherms
	Safri, A.; Fletcher, A. J.; Abdel-Halim, E.; Ismail, M. A.; Hashem, A.
通讯作者	Fletcher, AJ
来源期刊	JOURNAL OF POLYMERS AND THE ENVIRONMENT
ISSN	1566-2543
EISSN	1572-8919
英文摘要	Calligonum crinitum, a desert plant, was used as a natural adsorbent for the removal of Pb(II) ions from aqueous solutions. The sorption capacity of the sorbent was investigated through batch adsorption, as a function of contact time, metal ion concentration, and pH. The surface chemistry of the sorbent was probed using Fourier transform infrared spectroscopy, allowing an understanding of the key functionalities involved in binding the Pb(II) ions to the sorbent. Textural characteristics, including surface area and pore volume, showed higher surface areas relative to other natural adsorbents previously reported. Surface morphological analysis, observed via Scanning Electron Microscopy images and Energy-Dispersive X-Ray analysis, confirmed adsorption of Pb(II) ions, up to 71% on the surface of calligonum crinitum. Isothermal analysis, using Langmuir, Freundlich and Temkin models with nonlinear regression, showedthe Langmuir model to best represent adsorption within this system, yielding a maximum adsorption capacity of 337 mg g(-1) (pH 5.5, 30 degrees C). The optimum conditions of adsorption was pH, 5.5; adsorbent concentration, 0.3 g/l, contact time, 20 min at 30 degrees C. The Freundlich constant of < 10 indicates that adsorption of Pb(II) ions is favourable onto calligonum crinitum. Adsorption kinetics were modelled using pseudo-first-order, pseudo-second-order and intra-particle diffusion models; the results indicate that the kinetics are pseudo-second-order, suggesting a degree of chemical influence in the adsorption process. While thermodynamic analysis shows the process to be exothermic in nature with an ordering of solute within the adsorption process. Calligonum crinitum has, therefore, been proven as an effective sorbent for the removal of Pb(II) ions from aqueous solutions, with potential in water remediation processes.
英文关键词	Sorption Pb(ii) ions Calligonumcrinitum Kinetics Isotherms
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000591296600001
WOS关键词	WASTE-WATER ; REMOVAL ; ADSORPTION ; LEAD ; IONS ; ADSORBENT
WOS类目	Engineering, Environmental ; Polymer Science
WOS研究方向	Engineering ; Polymer Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328524
作者单位	[Safri, A.; Fletcher, A. J.] Univ Strathclyde, Dept Chem & Proc Engn, 75 Montrose St, Glasgow G1 1XJ, Lanark, Scotland; [Abdel-Halim, E.; Hashem, A.] Natl Res Ctr, Text Res Div, Cairo, Egypt; [Ismail, M. A.] Shaqra Univ, Fac Sci & Arts Sajer, Chem Dept, Shaqra, Saudi Arabia
推荐引用方式 GB/T 7714	Safri, A.,Fletcher, A. J.,Abdel-Halim, E.,et al. Calligonum Crinitum as a Novel Sorbent for Sorption of Pb(II) from Aqueous Solutions: Thermodynamics, Kinetics, and Isotherms[J].
APA	Safri, A.,Fletcher, A. J.,Abdel-Halim, E.,Ismail, M. A.,&Hashem, A..
MLA	Safri, A.,et al."Calligonum Crinitum as a Novel Sorbent for Sorption of Pb(II) from Aqueous Solutions: Thermodynamics, Kinetics, and Isotherms".JOURNAL OF POLYMERS AND THE ENVIRONMENT