my city essay quetta At a HA concentration of 56.1 mg/l, and presumably higher concentrations, the degradation rate decreased relative to that in the absence of HA. In comparison, Xiong and Graham (1992b) found that the optimal degradation of atrazine occurred at a mass ratio of humic substances (as DOC)-to-atrazine of 1.8. Are you looking for my city essay quetta?

>>>Click here<<< my city essay quetta - However, since only part of the humic substances would be HA, the corresponding HA:atrazine ratio would be lower, and therefore closer to the values shown in Table 2. A further comparison can be made between the enhanced TCP degradation caused by the presence of HA with that caused by hydrogen peroxide. Fig. .