Comparative analysis on adsorption properties and mechanisms of nitrate and phosphate by modified corn stalks

doi:10.1039/c8ra06617e

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	Comparative analysis on adsorption properties and mechanisms of nitrate and phosphate by modified corn stalks
	Wang, Lin 2,3,4; Xu, Zhizhi 3,4; Fu, Yongsheng 2; Chen, Yangwu 3,4; Pan, Zhicheng 1; Wang, Rui 2; Tan, Zhouliang 3,4
刊名	RSC ADVANCES
	2018
卷号	8 期号:64 页码:36468-36476
ISSN号	2046-2069
DOI	10.1039/c8ra06617e
产权排序	2
文献子类	Article
英文摘要	In this study, modified corn stalks (MCS) were successfully synthesized by grafting or crosslinking triethylenetetramine (TETA) and triethylamine (TEA) in the presence of epichlorohydrin (EPI) and N,N-dimethylformamide (DMF) for the effective removal of nitrate and phosphate. The characteristics of adsorbents were determined and the adsorption properties and mechanisms of nitrate and phosphate on MCS were studied and compared. Results from Zeta potential, elemental analysis (EA), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) showed that quaternary ammonium group was successfully grafted onto corn stalks (CS). Both adsorption properties and mechanisms indicated that the MCS had a better affinity to phosphate. For adsorption properties, under conditions of a dosage of 4 g L-1, pH 6.0 and an initial concentration of 50 mg L-1, the phosphate removal rate was 10.97% higher than that nitrate, and SO42- and Cl- had a larger inhibitive effect on nitrate. Mechanisms analysis included adsorption kinetics, isotherm and thermodynamics. Results indicated that the parameters of different models were closely related to the adsorption effect of nitrate and phosphate. In addition, pseudo-second-order and Freundlich model fitted both nitrate and phosphate adsorption well. The thermodynamics analysis indicated that the adsorption process was spontaneous and endothermic in nature.
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WOS关键词	AQUEOUS-SOLUTION ; REMOVAL ; ISOTHERM ; BIOSORBENT ; PRODUCTS ; KINETICS ; ANIONS ; STRAW ; WATER ; ACID
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000449704100008
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30372]
专题	成都生物研究所_应用与环境微生物研究
作者单位	1.Haitian Water Grp Co Ltd, Chengdu 610065, Sichuan, Peoples R China 2.Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu 611756, Sichuan, Peoples R China; 3.Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, P. R. China.; 4.Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, P. R. China;
推荐引用方式 GB/T 7714	Wang, Lin,Xu, Zhizhi,Fu, Yongsheng,et al. Comparative analysis on adsorption properties and mechanisms of nitrate and phosphate by modified corn stalks[J]. RSC ADVANCES,2018,8(64):36468-36476.
APA	Wang, Lin.,Xu, Zhizhi.,Fu, Yongsheng.,Chen, Yangwu.,Pan, Zhicheng.,...&Tan, Zhouliang.(2018).Comparative analysis on adsorption properties and mechanisms of nitrate and phosphate by modified corn stalks.RSC ADVANCES,8(64),36468-36476.
MLA	Wang, Lin,et al."Comparative analysis on adsorption properties and mechanisms of nitrate and phosphate by modified corn stalks".RSC ADVANCES 8.64(2018):36468-36476.