|
|
Removal of Cr(VI) from aqueous solution using organically modified attapulgite-supported nanoscale zero-valent iron |
XU Hai-yu, ZHANG Ming-qing, CHEN Yi-yu |
School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China |
|
|
Abstract Loading on clay mineral can improve the agglomeration behavior of zero-valent iron particles and enhance their reactivity. Particle agglomeration and reactivity are related to the mass ratio of iron to clay. In this study, CTMAB/A-nZVI-3 and CTMAB/A-nZVI-5 were prepared using organic attapulgite (CTMAB/A) as carrier by liquid phase reduction method when the mass ratio of iron to clay were set to 1:3 and 1:5, respectively. The loaded sample and the unloaded nZVI sample were characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The product of the sample after reaction with Cr(VI) was analyzed by X-ray photoelectron spectroscopy (XPS). The results showed that with the ratio of iron to clay decreasing, the agglomeration of nZVI particles were improved and the particle size distributions of nZVI were changed. The nZVI particles with particle size less than 10nm accounted for 3.60% in CTMAB/A-nZVI-3, 7.60% in CTMAB/A-nZVI-5, and zero in unloaded nZVI samples. When the amount of iron in supported samples was 0.75g/L, the Cr(VI) removal rateresulting from iron was 86.20% in CTMAB/A-nZVI-5samples and 78.00% in CTMAB/A-nZVI-3samples.
|
Received: 20 May 2019
|
|
|
|
|
[1] |
Ezzatahmadi N, Ayoko G A, Millar G J, et al. Clay-supported nanoscale zero-valent iron composite materials for the remediation of contaminated aqueous solutions:A Review[J]. Chemical Engineering Journal, 2017,312:336-350.
|
[2] |
Karn B, Kuiken T, Otto M. Nanotechnology and in situ remediation:A review of the benefits and potential risks[J]. Environmental Health Perspectives, 2009,117(12):1823-1831.
|
[3] |
Yan W, Herzing A A, Kiely C J, et al. Nanoscale zero-valent iron (nZVI):aspects of the core-shell structure and reactions with inorganic species in water[J]. Journal of Contaminant Hydrology, 2010, 118(3/4):96-104.
|
[4] |
韩占涛,吕晓立,张威,等.纳米零价铁地下水修复技术的最新研究进展[J]. 水文地质工程地质, 2013,40(1):41-47. Han Z T, Lv X L, Zhang W, et al. Groundwater remediation technology of nanoscale zero-valent iron particles:Areview[J]. Hydrogeology & Engineering Geology, 2013,40(1):41-47.
|
[5] |
Li-Na S, Yan Z, Zuliang C, et al. Simultaneous adsorption and degradation of Zn(2+) and Cu (2+) from wastewaters using nanoscale zero-valent iron impregnated with clays[J]. Environmental Science & Pollution Research, 2013,20(6):3639-3648.
|
[6] |
Shi L, Zhang X, Chen Z L. Removal of chromium (VI) from wastewater using bentonite supported nanoscale zero-valent iron[J]. Water Research, 2011,45:886-892.
|
[7] |
Wang Y, Alejandro López-Valdivieso, Zhang T, et al. Preparation of microscale zero-valent iron-fly ash-bentonite composite and evaluation of its adsorption performance of crystal violet and methylene blue dyes[J]. Environmental Science & Pollution Research, 2017,24(1):1-13.
|
[8] |
Chang Y, He Y, Liu T, et al. Aluminum pillared palygorskite-supported nanoscale zero-valent iron for removal of Cu(II), Ni(II) from aqueous solution[J]. Arabian Journal for Science & Engineering, 2014,39(9):6727-6736.
|
[9] |
董文凯,王文波,王爱勤.凹凸棒石功能化及其吸附应用研究进展[J]. 高分子通报, 2018,34(8):87-98. Dong W K, Wang W B, Wang A Q. Progress in functionalization of attapulgite and its application in adsorption[J]. Polymer Bulletin, 2018,34(8):87-98.
|
[10] |
刘少冲.有机改性凹凸棒土的制备及其除铬性能的研究[D]. 西安:陕西科技大学, 2015. Liu S C. Preparation of organically modified attapulgite and its removal for aqueous chromium[D]. Shaanxi University of Science & Technology, 2015.
|
[11] |
Quan G, Zhang J, Guo J, et al. Removal of Cr(VI) from aqueous solution by nanoscale zero-valent iron grafted on acid-activated attapulgite[J]. Water, Air, & Soil Pollution, 2014,225(6):1979-16201.
|
[12] |
关文贤,王志红,聂锦旭,等.改性凹凸棒土负载纳米铁的制备及性能[J]. 环境工程学报, 2016,10(12):6940-6946. Guan W X, Wang Z H, Nie J X, et al. Preparation and properties of nanoscale zero valent iron supported on modified attapulgite[J]. Chinese Journal of Environmental Engineering, 2016,10(12):6940-6946.
|
[13] |
雷蕾,殷其亮,肖阳,等.高分散性纳米铁的制备及其表征[J]. 硅酸盐通报, 2012,31(3):526-530. Lei L, Yin Q L, Xiao Y, et al. Preparation and activity test of dispersed iron nanoparticles[J]. Bulletin of the Chinese Ceramic Society, 2012, 31(3):526-530.
|
[14] |
陈佩圆,胡秀平,孙龙,等.快速沉淀法制备高分散高纯度球霰石晶体[J]. 人工晶体学报, 2019,48(3):477-481. Chen Y Y, Hu X P, Sun L, et al. Preparation of vaterite with high dispersibility and purity by fast precipitation method[J]. Journal of Synthetic Crystals, 2019,48(3):477-481.
|
[15] |
GB/T 7467-1987水质六价铬的测定二苯碳酰二肼分光光度法[S]. GB/T 7467-1987 Water quality determination of chromium 1,5-diphenylcarbohydrazide spectrophotometric method[S].
|
[16] |
杨艺琳,周孜迈,邓文娜,等.浮石负载纳米零价铁去除水相中的砷(V)[J]. 环境化学, 2017,36(3):598-607. Yang Y L, Zhou Z M, Deng W N, et al. Removal of arsenic(V) from aqueous solutions using improved nanoscale zero-valent iron on pumice[J]. Environmental Chemistry, 2017,36(3):598-607.
|
[17] |
黄园英,王倩,刘斯文,等.纳米铁快速去除地下水中多种重金属研究[J]. 生态环境学报, 2014,23(5):847-852. Huang Y Y, Wang Q, Liu S W, et al. Rapid removal of heavy metals from groundwater using nanoscale zero valent iron (nZVI) particles[J]. Ecology and Environmental Sciences, 2014,23(5):847-852.
|
[18] |
程浪,刘红,汪茜,等.CTMAB/凹凸棒土粒子的制备及其吸附Cr(VI)性能研究[J]. 环境科学与技术, 2017,40(10):77-81. Cheng L, Liu H, Wang Q, et al. Preparation and adsorption property for Cr (VI) of granular CTMAB/attapulgite[J]. Environmental Science & Technology, 2017,40(10):77-81.
|
[19] |
Yan W, Lien H L, Koel B E, et al. Iron nanoparticles for environmental clean-up:recent developments and future outlook[J]. Environmental Science-Processes & Impacts, 2013,15(1):63-77.
|
[20] |
王雅楠,李铁龙,王薇,等.小尺寸纳米铁粒子的液相还原控制制备[J]. 南开大学学报(自然科学版), 2014,47(6):72-78. Wang Y N, Li T L, Wang W, et al. Synthesis of small size iron nanoparticles by controlling liquid-phase reduction method[J]. Acta Scientiarum Naturalium Universitatis Nankaiensis, 2014,47(6):72-78.
|
[21] |
Chowdhury S R, Yanful E K, Pratt A R. Chemical states in XPS and Raman analysis during removal of Cr (VI) from contaminated water by mixed maghemite-magnetite nanoparticles[J]. Journal of hazardous materials, 2012,235:246-256.
|
[22] |
Boursiquot S, Mullet M, Ehrhardt J J. XPS study of the reaction of chromium (VI) with mackinawite (FeS)[J]. Surface & Interface Analysis, 2010,34(1):293-297.
|
|
|
|