Record Details

Aluminium hydroxide impregnated sawdust adsorbent: An eco-friendly and low-cost strategy for defluoridation of water

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Aluminium hydroxide impregnated sawdust adsorbent: An eco-friendly and low-cost strategy for defluoridation of water
 
Creator Mandal, Sujata
Johri, Simmi
Govind, Malarvizhi
 
Subject Aluminium hydroxide
Batch adsorption
Fixed-bed column adsorption
Fluoride
sawdust
 
Description 139-148
Environment-friendly and cost-effective adsorbent is necessary for removal of excess fluoride from water to control the
spread of fluorosis among people in fluoride-rich area. Plant-based cellulosic materials are the preferred choice for this
purpose. In this work, aluminium hydroxide impregnated sawdust (AHSD) adsorbent has been prepared, characterized and
applied for defluoridation of water through batch and fixed-bed adsorption. Fluoride adsorption capacity of AHSD in batch
adsorption experiment is 4.45 mg/g for the initial fluoride concentration between 5-50 mg/L. At low fluoride concentration,
the Freundlich isotherm model fit reasonably well, while at higher fluoride concentration (> 40 mg/L) the Langmuir model
show better fitting with the experimental data. The adsorption kinetics follow pseudo second-order kinetic model. In fixedbed
column adsorption, 4 g of the adsorbent is capable of bringing down the fluoride concentration from 5 mg/L to < 1.5
mg/L (WHO limit) for 690 mL of contaminated water. Residual aluminium in the treated water was within permissible limit
of WHO. The reasonably good adsorption capacity and effectivity in both batch and fixed-bed column adsorption suggests
that AHSD is an environment-friendly, cost-effective and promising adsorbent for defluoridation of water.
 
Date 2022-05-17T10:40:44Z
2022-05-17T10:40:44Z
2022-03
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscair.res.in/handle/123456789/59733
 
Language en
 
Publisher CSIR-NIScPR, India
 
Source IJCT Vol.29(2) [March 2022]