多聚物吸附纳米零价铁在多孔介质中的迁移

Abstract
Figure/Table
References (26)
Related Citation (15)

Download: PDF (484 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract To investigate the transport capability of nZVI in porous media, laboratory experiments including column and corrosion studies were conducted to investigate the transport capability of nanoscale zero-valent iron (nZVI) coated by different concentrations of polyacrylic acid (PAA) in quartz-sand filled porous medium and to observe their activity change after 6 hours' exposure to different electrolyte solutions. Utilizing transport distance and penetration rate, the transport performance of different iron materials in porous sandy media was characterized. The corrosion rate of nZVI in electrolyte solution was characterized by pH, ORP, Fe²⁺ concentration, XRD and Fe⁰ content changing curves with time. PAA adsorption on nZVI surface effectively improved transport performance of nZVI, but the corrosion raised by the PAA adsorption had been observed. Laboratory synthesized nanoscale zero-valent iron coated by 10% PAA presented the best performance in column test, with the penetration rate of 58.65% and Fe⁰ content moderately lost after 6 hours corrosion in electrolyte solution, which was less than the sample with 20% PAA adsorbed. Considering both the mobility in porous media and the reserved reactivity after aging for the nZVI with PAA modified, this study concludes that laboratory synthesized nZVI coated by 10% PAA is preferred for in-situ groundwater contamination remediation.

Key words： nanoscale zero-valent iron (nZVI) polyacrylic acid (PAA) transport corrosion

Received: 12 February 2018

X523

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHANG Jin
	WEI Cai-jie
	BAI Ge
	YANG Chao-guang
	WANG Xiao-mao
	YANG Hong-wei
	XIE Yue-feng

Cite this article:

ZHANG Jin,WEI Cai-jie,BAI Ge等. Transport of PAA modified nanoscale zero-valent iron in water saturated porous media[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(10): 3747-3754.

URL:

http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I10/3747

[1]	Ahn J, Kim C, Kim H, et al. Effects of oxidants on in situ treatment of a DNAPL source by nanoscale zero-valent iron:a field study[J]. Water Research, 2016,107:57-65.
[2]	Sun Y, Li H, Huang T, Guan X, The in fluences of iron characteristics, operating conditions and solution chemistry on contaminants removal by zero-valent iron:a review[J]. Water Research, 2016,100:277-295
[3]	Li S, Wang W, Liang F, Zhang W, Heavy metal removal using nano-scale zero-valent iron (nZVI):theory and application[J]. Journal of Hazard Material, 2017,322:163-171.
[4]	Wang C, Zhang W. Synthesizing nanoscale iron particles for rapid and complete dechlorination of TCE and PCBs[J]. Environmental Science and Technology, 1997,31:2154-2156.
[5]	Zhao X, Liu W, Cai Z, et al. 2016. An overview of preparation and applications of stabilized zero-valent iron nanoparticles for soil and groundwater remediation[J]. Water Research, 2016,100:245-266.
[6]	Phenrat T, Saleh N, Sirk K, et al. Aggregation and sedimentation of aqueous nanoscale zerovalent iron dispersions[J]. Environmental Science & Technology, 2007,41:284-290.
[7]	Dong H R, Lo I M C. Transport of surface-modified nano zero-valent iron (SM-NZVI) in saturated porous media:effects of surface stabilizer type, subsurface geochemistry, and contaminant loading[J]. Water, Air, & Soil Pollution, 2014,225:2107.
[8]	Busch J, Meibner T, Potthoff A, et al. Investigations on mobility of carbon colloid supported nanoscale zero-valent iron (nZVI) in a column experiment[J]. Environmental Science & Technology, 2014, 21(18):10908-16.
[9]	Phenrat T, Kim H J, Fagerlund F, et al. Empirical correlations to estimate agglomerate size and deposition during injection of a polyelectrolyte-modified Fe0 nanoparticle at high particle concentration in saturated sand[J]. Journal of Contaminant Hydrology, 2010,118:152-164.
[10]	Tufenkji N, Elimelech M. Correlation equation for predicting single-collector efficiency in physicochemical filtration in saturated porous media[J]. Environmental Science & Technology, 2004,38:529-536.
[11]	Ersenkal D A, Ziylan A, Ince N H, et al. Impact of dilution on the transport of poly (acrylic acid) supported magnetite nanoparticles in porous media[J]. Journal of Contaminant Hydrology, 2011,126:248-257.
[12]	Basnet M, Ghoshal S, Tufenkji N. Rhamnolipid biosurfactant and soy protein act as effective stabilizers in the aggregation and transport of palladium-doped zerovalent iron nanoparticles in saturated porous media[J]. Environmental Science & Technology, 2013,47:13355-13364.
[13]	Schrick B, Hydutsky B W, Blough J L. Delivery vehicles for zerovalent metal nanoparticles in soil and groundwater[J]. Chemistry of Materials, 2004,16:2187-2193.
[14]	Krajangpan S, Kalita H, Chisholm BJ, Bezbaruah AN, Iron nanoparticles coated with amphiphilic polysiloxane graft copolymers:Dispersibility and contaminant treatability, Environ. Sci. Technol., 2012,46:10130-10136.
[15]	He F, Zhang M, Qian T W, et al. Transport of carboxymethyl cellulose stabilized iron nanoparticles in porous media:Column experiments and modeling[J]. Journal of Colloid and Interface Science, 2009,334:96-102.
[16]	Tiraferri A, Sethi R. Enhanced transport of zerovalent iron nanoparticles in saturated porous media by guar gum[J]. Journal of Nanoparticle Research, 2009,11(3):635-645.
[17]	Zhai G M. Nanoparticle transport in porous medium and nanosized zero-valent iron (nZVI) for environmental remediation[D]. Hong Kong:University of Hong Kong, 2010.
[18]	Phenrat T, Kim H J, Fagerlund F, et al. Particle size distribution, concentration, and magnetic attraction affect transport of polymer-modified Fe0 nanoparticles in sand columns[J]. Environmental Science & Technology, 2009,43:5079-5085.
[19]	Phenrat T, Cihan A, Kim H J, et al. Transport and deposition of polymer-modified Fe0 nanoparticles in 2-D heterogeneous porous media:Effects of particle concentration, Fe0 content, and coatings[J]. Environmental Science & Technology, 2010,44:9086-9093.
[20]	Cirtiu C M, Raychoudhury T, Ghoshal S, et al. Systematic comparison of the size, surface characteristics and colloidal stability of zero valent iron nanoparticles pre-and post-grafted with common polymers[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2011,390:95-104.
[21]	Jiemvarangkul P, Zhang W X, Lien H L. Enhanced transport of polyelectrolyte stabilized nanoscale zero-valent iron(nZVI) in porous media[J]. Chemical Engineering Journal, 2011,170:482-491.
[22]	Saberinasr A, Rezaei M, Nakhaei M, et al. Transport of CMC-stabilized nZVI in saturated sand column:the effect of particle concentration and soil grain size[J]. Water, Air, & Soil Pollution, 2016,227:394.
[23]	Raychoudhury T, Tufenkji N, Ghoshal S. Straining of polyelectrolyte-stabilized nanoscale zero valent iron particles during transport through granular porous media[J]. Water Research, 2014,50:80-89.
[24]	Gomes H I, Ferreira C D, Ribeiro A B, et al. Enhanced transport and transformation of zerovalent nanoiron in clay using direct electric current[J]. Water, Air, & Soil Pollution, 2013,224:1710.
[25]	苏燕,赵勇胜,梁秀春,等.不同载体携带纳米零价铁在多孔介质中的迁移特性[J]. 中国环境科学, 2015,35(1):129-138.
[26]	Wei C J, Wang X M, Li X Y. Core-shell structured mZVI/Ca(OH)2 particle:Morphology, aggregation and corrosion[J]. Journal of Colloid and Interface Science, 2017,510:199.