Study and analysis of arsenic adsorption during sludge incineration

Abstract This paper studies the mechanism of arsenic adsorption by different adsorbents during sludge incineration. The mechanism of arsenic adsorption in the sludge incineration process was studied in a vertical furnace. The arsenic adsorption performance of CaCO 3 and Fe 2 O 3 at different temperatures was studied. When the temperature is 900°C, the overall adsorption performance is the best. Therefore, the arsenic adsorption performance of Al 2 O 3 , molecular sieve and its metal load at 900°C is further studied for comparison. The research results show that: the optimal adsorption temperature of CaCO 3 is 900°C, the optimal adsorption temperature of Fe 2 O 3 is 800°C, and the adsorption performance of CaCO 3 is better than Fe 2 O 3 . Ca 2+ : Al 3+ =0.5 and Fe 3+ : Al 3+ =0.4 are close to the adsorption saturation state when Al 2 O 3 adsorbs arsenic at 900°C. When the molecular sieve adsorbs arsenic at 900°C, the adsorption effect is best when the molecular sieve is 10X, Ca 2+ : Al 3+ =0.8 and Fe 3+ : Al 3+ =0.6 are close to the adsorption saturation state.