含空气气氛中制备生物炭及对水中磺胺嘧啶的去除

Preparation of biochar in air-containing atmosphere and its application for removal of sulfadiazine from water

尝试在热解气氛中定量掺入空气制备生物炭,以提高其表面积,并用于吸附去除模拟废水中的磺胺嘧啶。结果表明,随着空气流量的升高,生物炭的微、介孔表面积和孔容均显著提高;当热解温度为700℃时所得生物炭的介孔表面积最大。2种介孔表面积较大的生物炭(BA50800、BA50700)对磺胺嘧啶表现出更强的吸附去除能力,用量为200 mg/L时,其对磺胺嘧啶的去除率接近100%。

Air is quantitatively added to enhance the surface area of biochar in the pyrolysis.Then the prepared biochar samples are used to remove sulfadiazine in simulated wastewater.The results indicate that,the surface area and pore volume of both micropores and mesopores of biochar are enhanced significantly,when the air flow increases.The micropore surface of biochar is enhanced with the increase of pyrolysis temperature,and the highest mesopore surface area is observed on the biochar prepared at 700℃.The two biochar samples(BA50800 and BA50700)with large mesopore surface area show high adsorptive removal capacity to sulfadiazine in water.Meanwhile,the removal ratio is close to 100%when the biochar dosage is 200 mg/L.