Abstract: According to the Doehlert's matrix method, the adsorbent derived
from sewage sludge was prepared through chemical activation under controlling
the pyrolysis temperature and hold time. The characteristic parameters
including the total yield, adsorption of methylene blue, adsorption of iodine,
BET surface area, micro-pore volume are 35%–49%, 16.5–38 mg/g,
285–362 mg/g, 185–359 m^2/g, and
0.112–0.224 m^3/g, respectively. According to the
experimental data, the multi-linear regression method was adopted to fit the
relations between the characteristic parameters and influential factors. At
final, through optimization method, the optimal adsorbent is obtained when
using 62 min as hold time and 1105 K as pyrolysis temperature. Under the
conditions, the adsorbent was produced and compared the characteristic
parameters with model forecast value, the coherence is satisfied.
Keywords: adsorbent, sewage sludge, pyrolysis temperature, hold time, Doehlert's matrix
