This paper reports the synthesis of zinc oxide and zinc hydroxide carbonate loaded on activated carbon (ZnO/ZHC/AC composite) for degradation of Janus Green B (JGB). The ZnO/ZHC/AC sample was prepared by hydrothermal method with the presence of hexamethylene tetramine (HMTA) at the pH = without calcination process. | Effect of operational parameters on degradation of janus green b from aqueous solution using ZnO/ZHC/AC composite