Title :
Adsorption and Coprecipitation of As(V) from Aqueous Solutions by Aluminum Hydroxide
Author :
Liang, Meina ; Zhao, Yanlin ; Zhu, Yinian ; Liu, Huili ; Cai, Fenfen
Author_Institution :
Coll. of Environ. Sci. & Eng., Guilin Univ. of Technol., Guilin, China
Abstract :
The effects of solution pH and initial concentration on adsorption and coprecipitation of As(V) from aqueous solutions by aluminum hydroxide [Al(OH)3] for 50d and 1120d were studied. The XRD, FT-IR and SEM results indicated that there was only slight difference between the Al(OH)3 adsorbents before and after adsorption, but their crystal structure had not changed. The adsorption efficiency of As(V) onto Al(OH)3 increased with the increasing pH when pH<;6.0. When pH>9, the adsorption efficiency decreased with the increasing pH. For the initial As(V) concentration Co=0.1 or 0.01 mmol/L, the adsorption efficiency exceeded 99% at pH 6-9 after 50d or 1120d reaction, but the As(V) concentration in the solution after adsorption for 1120d was higher than that for 50d.
Keywords :
Fourier transform spectra; X-ray diffraction; adsorption; aluminium compounds; arsenic; crystal structure; infrared spectra; pH; precipitation (physical chemistry); scanning electron microscopy; water pollution control; Al(OH)3; As; FTIR spectra; SEM; XRD; adsorbents; adsorption; aluminum hydroxide; aqueous solutions; coprecipitation; crystal structure; pH; time 1120 d; time 50 d; Aluminum; Chemical analysis; Computer aided instruction; Educational institutions; Humans; Protection; Purification; Wastewater treatment; Water pollution; X-ray scattering;
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
DOI :
10.1109/ICBBE.2010.5517530
