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Research has been carried out on reducing CO gas levels using ZSM-5 membranes synthesized at low temperatures with various treatments in the gauze 304-200 mesh. The purpose of these various treatments is to make ZSM-5 zeolite precursors grow very well on the surface of the gauze. Variations of the 4 treatments used were soaked in HNO3 10% at 60ºC and acetone; soaked in toluene 95% and HCl 15%; soaked in NaOH 20%, HCl 15% and electroxidated with H2SO4 20%; and soaked in toluene 95%, HCl 15%, and TPABr 0.1 M. This study is an experimental study supported by the literature. the CO gas used source of cigarettes burned for 5 minutes in a closed reactor chamber with a volume of 18 liters through the ZSM-5 membrane for 10 minutes. Reduction of CO gas with 4 treatments is 9.42%; 6.36%; 10.26% and 7.75%. The largest percentage reduction of CO gas in the third treatment was soaked in NaOH 15%, HCl 15% and electroxidated with H2SO4 20%.