Performance Optimization of Sludge Adsorbent Prepared by Microwave Pyrolysis

The sludge adsorbent was prepared by microwave pyrolysis through the addition of microwave absorbers.The effects of different preparation conditions on the sludge adsorbent performance were investigated.The results show that when the sludge dosage is 35 g,the optimum conditions for preparing sludge adsorbent by the microwave pyrolysis are as follows: the microwave power is 1.2 kW,radiation time is 10 min,the microwave absorber dosage is 10 g.The iodine value of the sludge adsorbent under the above conditions achieves 585.95 mg/g.The appropriate microwave radiation can pyrolyse organic matters and form sludge adsorbent with carbon framework.The sludge adsorbent can adsorb acid and alkali dyes efficiently,but the adsorption capacity of sludge adsorbent is smaller than that of activated carbon.