Efficient Phosphate Removal from Wastewater by Ca-Laden Biochar Composites Prepared from Eggshell and Peanut Shells: A Comparison of Methods

Biochar is currently widely used as the adsorbent for phosphorus (P) removal from wastewater. Cheap and green modified materials efficient preparation methods are key to obtain economical engineering biochar. Conventional salt solution chemical impregnation common preparing engineered However, this method not environmentally friendly or cheap due price of solutions solvent treatment process impregnation. In article, Ca-laden biochar was prepared using peanut shells carbon base discarded eggshells calcium source. Two (ball milling impregnation) building were compared perspective characterization biochar, adsorption performance economic cost. The composition structure analyzed by element content, functional group, X-ray diffraction, energy spectrum electron microscope scanning etc. behavior tested in different environments (pH temperature). results revealed that capacity P Ca-modified higher than raw has a wide working environment. Moreover, ball specific surface area more porosity. through amount adsorbed This work only creates novel making excellent adsorbents, but also offers an use agricultural shells.