highly significantp < 0.0001
Among the model terms, pH (A) and temperature (B) showed highly significant effects (p < 0.0001), while calcination time (C) was found to be statistically insignificant (p = 0.5976).
Among the model terms, pH (A) and temperature (B) showed highly significant effects (p < 0.0001), while calcination time (C) was found to be statistically insignificant (p = 0.5976).
The hydrogen production rate (HPR) and yield (HY) increased with rising HAP concentration up to 560 mg/L, after which a decreasing trend was observed.