Comparison of treated laterite as arsenic adsorbent from different locations and performance of best filter under field conditions.
J Hazard Mater
; 262: 1176-86, 2013 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-22785008
ABSTRACT
Arsenic pollution in groundwater is a worldwide concern due to its chronic effects on human health. Numerous studies have been carried out to obtain cost-effective arsenic removal method. Adsorption using natural materials or its treated forms is found to be cost-effective technology. Raw laterite (RL) or its treated form (TL) is studied recently as arsenic adsorbent for aqueous system. Laterite composition varies with geographical location and extent of lateritization. The study on effects of arsenic adsorption with varying composition of laterite is not explored yet. Four laterite samples with different compositions are examined to remove arsenic from water. These laterite samples are activated using an optimized acid followed by base treatment method in order to determine the effects of RL composition on arsenic adsorption behavior of TL. Higher iron and aluminum containing RL samples show higher arsenic adsorption behavior. Similarly, TL obtained from higher iron and aluminum containing RL sample shows the higher specific surface area (130-180 m(2) g(-1)) and pore volume (0.28-0.35 mL g(-1)). Two household filters using TL are deployed in arsenic affected area of Barasat, 24 Parganas (N), West Bengal, India and their performance is monitored for about a year.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Arsênio
/
Purificação da Água
/
Minerais
País como assunto:
Asia
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article