Aqueous scavenging of polycyclic aromatic hydrocarbons using epichlorohydrin, 1,6-hexamethylene diisocyanate and 4,4-methylene diphenyl diisocyanate modified starch: Pollution remediation approach

doi:10.1016/j.arabjc.2015.06.004

	Aqueous scavenging of polycyclic aromatic hydrocarbons using epichlorohydrin, 1,6-hexamethylene diisocyanate and 4,4-methylene diphenyl diisocyanate modified starch: Pollution remediation approach
	Okoli, Chukwunonso Peter 1,2,3; Adewuyi, Gregory Olufemi 1; Zhang, Qian 2; Zhu, Guangxu 2; Wang, Chungyu 2; Guo, Qingjun 2
刊名	ARABIAN JOURNAL OF CHEMISTRY
	2019-12-01
卷号	12 期号:8 页码:2760-2773
关键词	Polycyclic Aromatic Hydrocarbons (PAHs) Cross-linked starch polymer Adsorption mechanism Adsorbent regeneration Water remediation
ISSN号	1878-5352
DOI	10.1016/j.arabjc.2015.06.004
通讯作者	Guo, Qingjun(guoqj@igsnrr.ac.cn)
英文摘要	Cross linking of starch molecules with suitable reagents provides opportunity for incorporation of relevant functional groups, thereby tuning the adsorption properties of the starch polymer adsorbent towards target pollutants, as a function of the nature of the cross linking agent and the chemical identity of the pollutants. In this vein, this study assessed the applicability of epichlorohydrin cross-linked starch (EPIS), 1,6-hexamethylene diisocyanate cross-linked starch (HDIS), and 4,4-methylene diphenyl diisocyanate cross-linked starch (MDIS) polymer adsorbents for treatment of aqueous Polycyclic Aromatic Hydrocarbon (PAHs) pollution in environmental water samples. Cross-linking process led to improvement in surface characteristics, level of hydrophobicity, and incorporation of relevant functional groups. Adsorption capacities of the adsorbents were in the order of MDIS > HDIS > EPIS. PAHs molecules were adsorbed in multi-layer, in a flat-wise orientation, while external and internal diffusion dominated the adsorption kinetics. Adsorption mechanisms suggested that these adsorbents spontaneously adsorb PAHs molecules driven mainly by enthalpy change, and the adsorption process was attributed to physisorption involving hydrophobic, van der Waals and pi-pi interactions between adsorbent and adsorbates. The thermodynamic evaluation indicated that the adsorption process was majorly endothermic and spontaneous. Desorption studies indicated that the adsorbents can be efficiently regenerated. The adsorbents were effective in treating simulated and real environmental water samples, and hence, are promising cost-effective alternative for control of aqueous PAHs pollution. (C) 2015 The Authors. Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
资助项目	The World Academy of Sciences (TWAS)[3240240233] ; Chinese Academy of Sciences (CAS)[3240240233] ; One Hundred Talents Program of the Chinese Academy of Sciences, 863 Program[2013AA06A211-2]
WOS关键词	PHENANTHRENE SORPTION ; ORGANIC POLLUTANTS ; RISK-ASSESSMENT ; YELLOW-RIVER ; REMOVAL ; CARBON ; CYCLODEXTRIN ; ADSORPTION ; WATER ; BIOSORPTION
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000504900300103
资助机构	The World Academy of Sciences (TWAS) ; Chinese Academy of Sciences (CAS) ; One Hundred Talents Program of the Chinese Academy of Sciences, 863 Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/131144]
专题	中国科学院地理科学与资源研究所
通讯作者	Guo, Qingjun
作者单位	1.Univ Ibadan, Dept Chem, Analyt Environm Chem Unit, Ibadan, Nigeria 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, Beijing, Peoples R China 3.Western Delta Univ, Ind Chem Dept, Oghara, Delta State, Nigeria
推荐引用方式 GB/T 7714	Okoli, Chukwunonso Peter,Adewuyi, Gregory Olufemi,Zhang, Qian,et al. Aqueous scavenging of polycyclic aromatic hydrocarbons using epichlorohydrin, 1,6-hexamethylene diisocyanate and 4,4-methylene diphenyl diisocyanate modified starch: Pollution remediation approach[J]. ARABIAN JOURNAL OF CHEMISTRY,2019,12(8):2760-2773.
APA	Okoli, Chukwunonso Peter,Adewuyi, Gregory Olufemi,Zhang, Qian,Zhu, Guangxu,Wang, Chungyu,&Guo, Qingjun.(2019).Aqueous scavenging of polycyclic aromatic hydrocarbons using epichlorohydrin, 1,6-hexamethylene diisocyanate and 4,4-methylene diphenyl diisocyanate modified starch: Pollution remediation approach.ARABIAN JOURNAL OF CHEMISTRY,12(8),2760-2773.
MLA	Okoli, Chukwunonso Peter,et al."Aqueous scavenging of polycyclic aromatic hydrocarbons using epichlorohydrin, 1,6-hexamethylene diisocyanate and 4,4-methylene diphenyl diisocyanate modified starch: Pollution remediation approach".ARABIAN JOURNAL OF CHEMISTRY 12.8(2019):2760-2773.