THIS study was conducted to activate and characterize carbons prepared from coconut shells for subsequent adsorption of Cr (VI) from synthetic wastewater.The adsorption process was carried out through batch studies.The results showed that the process was pH, contact time and temperature dependent.The optimum pH for Cr (VI) adsorption was 2 for both cashew bark extract activated (CNAC1) and H3PO4 a...