干旱区生态环境知识资源中心(Arid): Aminated Hydroximoyl Camelthorn Residues as a Novel Adsorbent for Extracting Hg(II) From Contaminated Water: Studies of Isotherm, Kinetics, and Mechanism

Arid

DOI	10.1007/s10924-020-01789-6
	Aminated Hydroximoyl Camelthorn Residues as a Novel Adsorbent for Extracting Hg(II) From Contaminated Water: Studies of Isotherm, Kinetics, and Mechanism
	Hashem, A.1; Fletcher, A. J.2; El-Sakhawy, M.3; Mohamed, Latifa A.4; Farag, S.1
通讯作者	Hashem, A.
来源期刊	JOURNAL OF POLYMERS AND THE ENVIRONMENT
ISSN	1566-2543
EISSN	1572-8919
出版年	2020
卷号	28 期号:9 页码:2498-2510
英文摘要	Camelthorn, a desert plant, has been utilized as an adsorbent material for the extraction of Hg(II) ions from aqueous solution after grafting with acrylonitrile followed by amination with hydroxylamine hydrochloride in basic medium to obtain aminated hydroximoyl camelthorn (AHCT). AHCT were found to exhibit excellent adsorption capacity over a wide range of Hg(II) concentration. The surface functional groups and morphology of AHCT were determined. The influences of time (0-60 min), pH (2-6), and dose (0.3-8 g/L) were also evaluated. The adsorption data were analyzed using the Langmuit, Freundlich and Temkin tr models at 30 degrees C using nonlinear regression analysis. The maximum adsorption capacity (q(max)) of Hg(II) onto AHCT was 272.9 mg/g at an initial pH of 6 and a temperature of 30 degrees C and the Freundlich constants, K(F)and n, at 30 degrees C were found to be 25.47 mg/g and 3.2, respectively. The value of n (3.2), which being in the range 0-10 indicate that adsorption of Hg(II) ions onto AHCT is favorable. Various kinetics models including the pseudo-first-order, pseudo-second-order and intraparticle diffusion models have been applied to the experimental data to predict the adsorption kinetics. Kinetic study was carried out by varying initial concentration of Hg(II) at constant temperature and it was found that pseudo-second-order rate equation was better obeyed than pseudo-first-order and intraparticle diffusion supporting that chemisorption process was involved. The examination of R(2)values and error analysis method (ARE) showed that the Langmuir model provide the best fit to experimental data than other isotherms and follow the following order: Langmuir > Freundlich > Temkin. The results revealed that the AHCT-Hg(II) ions adsorption system was promoted by the high density of active sites and the adsorption process is independent of the adsorbent surface area. Consequently, AHCT residues can offer an effective method of Hg (II) ion removal from aqueous solutions, demonstrating its potential role in water remediation processes.
英文关键词	Adsorption Mercury (II) ions Kinetics Isotherms Camelthorn Adsorbent
类型	Article
语种	英语
国家	Egypt ; Scotland
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000540406900001
WOS关键词	HG II IONS ; AQUEOUS-SOLUTION ; HEAVY-METALS ; WASTE-WATER ; ADSORPTIVE REMOVAL ; ACTIVATED CARBON ; SORPTION ; SAWDUST ; MODELS
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/2XILL650/318796
作者单位	1.Natl Res Ctr, Text Res Div, Cairo, Egypt; 2.Univ Strathclyde, Dept Chem & Proc Engn, 75 Montrose St, Glasgow G1 1XJ, Lanark, Scotland; 3.Natl Res Ctr, Cellulose & Paper Dept, 33 El Bohouth Str,PO 12622, Giza, Egypt; 4.Natl Res Ctr, Microbial Chem Dept, Cairo, Egypt
推荐引用方式 GB/T 7714	Hashem, A.,Fletcher, A. J.,El-Sakhawy, M.,et al. Aminated Hydroximoyl Camelthorn Residues as a Novel Adsorbent for Extracting Hg(II) From Contaminated Water: Studies of Isotherm, Kinetics, and Mechanism[J],2020,28(9):2498-2510.
APA	Hashem, A.,Fletcher, A. J.,El-Sakhawy, M.,Mohamed, Latifa A.,&Farag, S..(2020).Aminated Hydroximoyl Camelthorn Residues as a Novel Adsorbent for Extracting Hg(II) From Contaminated Water: Studies of Isotherm, Kinetics, and Mechanism.JOURNAL OF POLYMERS AND THE ENVIRONMENT,28(9),2498-2510.
MLA	Hashem, A.,et al."Aminated Hydroximoyl Camelthorn Residues as a Novel Adsorbent for Extracting Hg(II) From Contaminated Water: Studies of Isotherm, Kinetics, and Mechanism".JOURNAL OF POLYMERS AND THE ENVIRONMENT 28.9(2020):2498-2510.