Abstract:
Arsenic contamination in wastewater, even in drinking water has been recognized as a worldwide
problem. It affects human health severely if the limit of toxicity is crossed .There are several
treatment methods capable of this level of performance - membranes, coagulation, anion exchange,
disposable iron media, sotieiiing , adsorption etc. But adsorption is the cheaper and easier as well as
efficient method compared to other methods for removal of metal ions. The present Study has been
carried out using two di!Thrent raw hioadsorbents like rice husk and maize leaves. Several work has
41 been done on these bio-adsorbents and it has been already reported that rice husk and maize leaves
are one of the cheap and effective bioadsorbents for removal of arsenic from industrial wastewater.
But the removal efficiency has been increased when adsorbents are impregnated by zirconium and
zinc .Different analysis SUCh as FESEM, EDAX, TGA, DTA,FTIR has been done to characterize the
adsorbent. FESEM can be able to capture the images of the adsorbents with high resolution. EDAX
determines metals and elements presence on the rice husk.DTAITGA shows the loss of the moisture
with respect to temperature. SDDC method was applied for analysis of arsenic. Batch experiments
were conducted by varying various process parameters such as pH, contact time and temperature.
At optimum treatment conditions (pH 8, contact time of 5 hrs and temperature of 35°C, adsorbent
dose 10 g/l) 89.51% As was removed from aqueous solution. Langmuir and Freundlich isotherms
were used for equilibrium studies. Freundlich isotherm was better fitted with experimental data. As
well as adsorption biological methods are promising field due to cost-effectiveness and in this
method possibility of sludge production is nil. In this study immobilization of p.putida MTCC 1194
on zirconium impregnated rice husk has been done in order to increase arsenic removal capacity
