Dynamic Adsorption Characteristics of As(Ⅴ) to Nanometer Iron Oxide/Bagasse Activated Carbon Composite Adsorbent
LIANG Meina
WANG Dunqiu
ZHU Yinian
XIAO Yu
ZHU Lin
LI Huanhuan
Abstract：Fixed-bed experiments were carried out by using a nanometer iron oxide/bagasse activated carbon composite adsorbent (NAC) as adsorbent for the dynamic adsorption of As (Ⅴ) from aqueous solution.The effect of As (Ⅴ) feed concentration,pH value,bed height and inlet flow rate on the breakthrough curves were investigated and the regeneration and recycle using of NAC were investigated as well.The results showed that the breakthrough time decreases with the increase of inlet As (Ⅴ) concentration and inlet flow rate of arsenic solution while increasing with the increase of bed height.The rule of change of breakthrough time with pH value is tb(pH=33) ＜tb(pH=9.8) ＜tb(pH=6.8).Kinetic constants of Thomas model(KTH) and Adams-Bohart model (KAB) decreases with the increase of inlet As(Ⅴ) concentration and bed height while increasing with the increase of inlet flow rate of arsenic solution.KTH decreases with the increase of pH value.The change rule of KAB with pH value is KAB(pH=6.8) ＜KAB(pH=3.3) ＜KAB(pH=9.8).The As(Ⅴ) concentration of regeneration solution was lower than 10 μg/L after NAC was chemically regenerated by 1 mol/L of HCl solution and a regeneration efficiency of 33.56％ was observed.
Keywords：nanometer iron oxidedynamic adsorptionThomas modelAdams-Bohart modeling
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 97-102 )