Paper Title
BIOTECHNOLOGY MEETS WATER SAFETY: PURPLE NON-SULFUR BACTERIA BASED ADSORBENTS FOR ARSENIC REMOVAL FROM WATER.

Abstract
This study focuses on a novel biosorbent created through the polymerization of a biomass of Purple Non –Sulfur Bacteria and a polymer, aimed at effectively removing arsenic from drinking water. The biosorbent has remarkable effectiveness in decreasing both arsenic species As (III) and As (V) to concentrations below the USEPA threshold of 10 µg/L after 15 hours under ideal conditions. It is especially effective at an alkaline pH of 8.4 and can be reused for up to four cycles with minimal reduction in efficiency. Exhibiting adsorption capabilities of 165 mg/g for As (V) and 168 mg/g for As (III), it outperforms existing methods. The adsorption mechanism adheres to the Freundlich isotherm model, with R² values of 97% for As (V) and 99.5% for As (III). This novel methodology overcomes the shortcomings of current techniques, providing cost efficiency, enhanced performance across diverse pH levels, and the capacity to remediate more hazardous arsenic species. The biosorbent is a viable approach for scalable and sustainable arsenic remediation in water purification systems. Keywords – As (III), As (V), Adsorption, Biosorbent, Polymer, Purple Non- Sulfur Bacteria