Arsenic, Iron, and Manganese Adsorption in Single and Trinary Heavy Metal Solution Systems by Bamboo-Derived Biochars

Currently, heavy metal-contaminated groundwater is an environmental concern. This study investigated the use of bamboo biochar, chitosan-impregnated and iron-impregnated biochar for arsenic, iron, manganese removal from groundwater. Isotherms adsorption by derived were compared with those commercial activated carbon in simulated composed single trinary metal solutions. The binding metals virgin loaded was also sequential extraction. Chitosan had enhanced arsenic adsorption, but these sorbents turned pH solution acidic, while it alkaline carbon. Adsorption equilibrium times iron faster than systems because less ion competition occurred at active sites. Langmuir model fitted data well. maximum capacities system 2.2568, 0.6393, 1.3541 mg g−1, respectively. main mechanism precipitation iron. Bamboo bound organic sulfide fractions iron-oxide. can replace as a more efficient sustainable carbonaceous sorbent material mixed within acceptable ranges.