NaCl改性沸石对水中氨氮的吸附机制

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Abstract

Surface morphology of zeolite before and after modified was analyzed through the particle strength, scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) and point of zero charge (pHPZC). Adsorption studies were carried out at different pH, zeolite dosage, initial ammonium concentrations and temperature. Adsorption mechanism was measured through the adsorption isotherm and adsorption dynamics. The feature of NaCl modified zeolite included increased particle strength, a rough surface, and enlarged pore size. It was also found that sodium ions would enter the zeolite internal through ion exchange. The experimental results showed that the best adsorption condition was pH value of 7, zeolite dosage of 8g/L and temperature at 35℃. The study also revealed that equilibrium adsorption capacity (qe) was positive correlation with initial ammonium concentration. Adsorption data was fitted better to Langmuir adsorption isotherms, with maximal adsorption capacity of 13.210mg/g. The results of kinetics study indicated that the pseudo-second-order model fitted to the experimental data well. These results therefore proved that NaCl modified zeolite could be effectively used as a low-cost adsorbent for the removal of ammonium from wastewater.

Key words： sodium chloride modified zeolite adsorption ammonium

Received: 16 April 2016

PACS:

X703.1

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	Articles by authors
	LI Wen-jing
	LI Jun
	ZHANG Yan-zhuo
	CHENG Xiao-jie
	BIAN Wei

Cite this article:

LI Wen-jing,LI Jun,ZHANG Yan-zhuo等. Adsorption mechanism of ammonium from aqueous solutions by NaCl modified zeolite[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(12): 3567-3575.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I12/3567

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[25]	Wang F L, Alva A K. Ammonium adsorption and desorption in sandy soils[J]. Soil Science Society of America Journal, 2000, 64(5):1669-1674.
[26]	Guaya D, Valderrama C, Farran A, et al. Simultaneous phosphate and ammonium removal from aqueous solution by a hydrated aluminum oxide modified natural zeolite[J]. Chemical Engineering Journal, 2015,271:204-213.
[27]	RodrıGuez-IznagaI, GómezA, RodrıGuez-Fuentes J, et al. Natural clinoptilolite as an exchanger of Ni2+ and NH4+ ionsunder hydrothermal conditions and high ammonia concentration[J]. Microporous & Mesoporous Materials, 2002,53(s1-3):71-80
[1]	钱易,等.环境保护与可持续发展[M]. 北京:高等教育出版社, 2000.
[2]	姚淑华,张晓艳,石中亮.氨氮废水处理技术及研究进展[J]. 化工中间体, 2010,(11):24-30.
[3]	Kermani M, Bina B, Movahedian H, et al. Biological phosphorus and nitrogen removal from wastewater using moving bed biofilm process[J]. Iranian Journal of Biotechnology, 2009,7(1):19-27.
[4]	Liao P H, Chen A, Lo K V. Removal of nitrogen from swine manure wastewaters by ammonia stripping[J]. Bioresource Technology, 1995,54(1):17-20.
[5]	Hedstrom A. Ion exchange of ammonium in zeolites:A literature review[J]. Journal of Environmental Engineering, 2001,127(8):673-81.
[6]	Gupta V K, Carrott P J M, Ribeiro M M L, et al. Low cost adsorbents:Growing approach to wastewater treatment-areview[J]. Critical Reviews in Environmental Science & Technology, 2009,39(10):783-842.
[7]	余振宝,宋乃忠,等.沸石加工与应用[M]. 北京:化学工业出版社, 2013.
[8]	Weitkanp J, Puppe L. Catalysis and zeolites:Fundamentals and applications[M]. Germany:Springer, 1999.
[9]	Querol X, Moreno N, Umana J C, et al. Synthesis of zeolites from coal fly ash:An overview[J]. International Journal of Coal Geology, 2002,50(2):413-423.
[10]	Moreno N, Querol X, Ayora C. Utilization of zeolites synthesized from coal fly ash for the purification of acid mine waters[J]. Environmental Science & Technology, 2001,35(17):3526-3534.
[11]	夏丽华,董秉直,高乃云,等.改性沸石去除氨氮和有机物的研究[J]. 同济大学学报:自然科学版, 2005,33(1):78-82.
[12]	范树景,张扬,肖昊轩,等.焙烧及改性对沸石吸附甲醛性能的影响[J]. 佳木斯大学学报:自然科学版, 2010,28(1):95-99.
[13]	李效红. β-环糊精改性沸石吸附水中有机污染物和重金属的研究[D]. 兰州:兰州交通大学, 2012.
[14]	张新艳,王起超,张少庆,等.天然和疏基改性沸石吸附水溶液中重金属Hg2+的特征研究[J]. 环境工程学报, 2009,3(3):455-460.
[15]	Gunay A. Application of nonlinear regression analysis for ammonium exchange by natural (Bigadic) clinoptilolite[J]. Journal of Hazardous Materials, 2007,148(3):708-713.
[16]	Miyaji F, Masuda S, SuyamaY. Ammonium exchange in leakage waters of waste dumps using natural zeolite from the Krapina region, Croatia[J]. Journal of Hazardous Materials, 2005,117(1):25-33.
[17]	MinatoJ, Kim Y J, Yamada H, et al. Alkali-hydrothermal modification of air-classified koreannatural zeolite and their ammonium adsorption behaviors[J]. Separation Science and Technology, 2004,39(16):3739-3751.
[18]	国家环境保护总局,水和废水监测分析方法编委会.水和废水监测分析方法[M]. 北京:中国环境科学出版社, 2002.
[19]	Villanueva M E, Salinas A, Copello G J, et al. Point of zero charge as a factor to control biofilm formation of Pseudomonas aeruginosa in sol-gel derivatized aluminum alloy plates[J]. Surface & Coatings Technology, 2014,254(10):145-150.
[20]	Sarma J, Mahiuddin S. Specific ion effect on the point of zero charge of α-alumina and on the adsorption of 3,4-dihydroxybenzoic acid onto α-alumina surface[J]. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2014, 457:419-424.
[21]	佟小薇,朱义年.沸石改性及其去除水中氨氮的实验研究[J]. 环境工程学报, 2009,3(4):635-638.
[22]	Stumm W. Chemistry of the solid-water interface:processes at the mineral-water and particle-water interface in natural systems[J]. John Wiley & Sons, 1992.
[23]	Garg V K, Kumar R, Gupta R. Removal of malachite green dye from aqueous solution by adsorption using agro-industry waste:A case study of Prosopis cineraria[J]. Dyes & Pigments, 2004, 62(1):1-10.
[24]	Vilar V J P, Botelho C M S, Rui A R B. Equilibrium and kinetic modelling of Cd(Ⅱ)biosorption by algae Gelidium and agar extraction algal waste[J]. Water Research, 2006,40(2):291-302.
[25]	Wang F L, Alva A K. Ammonium adsorption and desorption in sandy soils[J]. Soil Science Society of America Journal, 2000, 64(5):1669-1674.
[26]	Guaya D, Valderrama C, Farran A, et al. Simultaneous phosphate and ammonium removal from aqueous solution by a hydrated aluminum oxide modified natural zeolite[J]. Chemical Engineering Journal, 2015,271:204-213.
[27]	RodrıGuez-IznagaI, GómezA, RodrıGuez-Fuentes J, et al. Natural clinoptilolite as an exchanger of Ni2+ and NH4+ ionsunder hydrothermal conditions and high ammonia concentration[J]. Microporous & Mesoporous Materials, 2002,53(s1-3):71-80