Figure 1: Carbon dioxide (CO2) and nitrogen (N2) gas recovered from the total gas generated by the MET-1 bacterial communities after 48 h exposure to AgCl and control (no Ag), where L-, M- and H- prefixes on AgCl represent 25, 100 and 200 mg/L concentrations, respectively. The percentage of the total gas volume reduced after exposure to AgCl colloids, compared to the control, is shown in the separated pie slice of the AgCl treatment groups.