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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.12 [2005] >
IJEMS Vol.12(2) [April 2005] >
| Title: | Solar photocatalytic oxidation and removal of arsenic from ground water |
| Authors: | Majumder, Ayan
Chaudhuri, Malay |
| Issue Date: | Apr-2005 |
| Publisher: | CSIR |
| IPC Code: | C02F |
| Abstract: | In a laboratory study, the effectiveness of combined tartrate
and citrate as photocatalyst in solar photocatalytic oxidation and removal of
arsenic from ground water was studied and a method, using a naturally occurring
tartrate-citrate photocatalyst that can be used at the household level to treat
small quantities of drinking water was developed. Kinetic tests performed with
250  g/L As(III)-spiked ground water in
presence of 5 mg/L Fe(II) and 50 M
photocatalyst, showed equal efficiency of tartrate and citrate in combination
for oxidation and removal of arsenic from ground water in 6 h solar
illumination. Presence of silicate moderately decreased the removal of arsenic,
while phosphate had more drastic effect on arsenic removal. With the increase
in initial As(III) concentration above 250 g/L,
5 mg/L Fe(II) did not achieved the removal to below 50 g/L, although the maximum removal efficiency was 80%. Extract
of tamarind (fruit of the tree Tamarindus
indica), a natural source of tartrate-citrate (equivalent to 50 M tartrate and citrate) achieved the arsenic
oxidation and removal from 250-260 g/L
arsenic-bearing water to below 50 g/L.
The method performed within a 1-L closed PET bottle showed similar removal and
can be applied at the household level to treat small quantities of drinking
water. |
| Page(s): | 122-128 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.12(2) [April 2005]
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