As(III) removal by hydrous titanium dioxide prepared from one-step hydrolysis of aqueous TiCl(4) solution

Water Research
Zhengchao XuJian Ku Shang

Abstract

Hydrous titanium dioxide (TiO(2)·xH(2)O) nanoparticles were synthesized by a low-cost one-step hydrolysis process with aqueous TiCl(4) solution. These TiO(2)·xH(2)O nanoparticles ranged from 3 to 8 nm and formed aggregates with a highly porous structure, resulting in a large surface area and easy removal capability from aqueous environment after the treatment. Their effectiveness on the removal of As(III) (arsenite) from water was investigated in both laboratory and natural water samples. The adsorption capacity on As(III) of these TiO(2)·xH(2)O nanoparticles reached over 83 mg/g at near neutral pH environment, and over 96 mg/g at pH 9.0. Testing with a As(III) contaminated natural lake water sample confirmed the effectiveness of these TiO(2)·xH(2)O nanoparticles in removing As(III) from natural water. The high adsorption capacity of the TiO(2)·xH(2)O nanoparticles is related to the high surface area, large pore volume, and the presence of high affinity surface hydroxyl groups.

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Citations

Jun 15, 2013·Water Research·Yuankui SunHongliang Bao
Dec 20, 2013·Environmental Technology·Shaolin WuGuisheng Zeng
Dec 26, 2015·International Journal of Environmental Research and Public Health·Nina Ricci NicomelGijs Du Laing
Mar 27, 2012·Journal of Hazardous Materials·Xiaohong GuanQinghai Hu
Mar 21, 2015·Environmental Science and Pollution Research International·Mirna Habuda-Stanić, Marija Nujić
Aug 11, 2020·Environmental Science and Pollution Research International·Md Jamal Uddin, Yeon-Koo Jeong
Jul 9, 2017·Environmental Monitoring and Assessment·Pankaj GogoiTarun K Maji
Nov 14, 2020·Journal of Hazardous Materials·Jyoti Prakash MaityJochen Bundschuh
Dec 18, 2020·International Journal of Environmental Research and Public Health·Guifeng LiuLihao Zhang
Apr 7, 2019·Journal of Environmental Sciences (China)·Jianqiang SunChunyang Liao

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