【摘要】 为了获得汞初始浓度、吸附温度以及气氛（O₂、CO₂、SO₂浓度）等不同吸附条件下生物炭的汞吸附特性,对等温和非等温条件下制备的核桃壳生物炭(分别记为WS_iso和WS_var)进行了研究,并利用比表面积和孔隙度分析仪、傅立叶变换红外光谱仪表征生物炭的孔隙结构和表面官能团等微观特性,探究其影响机理。结果表明:WS_iso和WS_var孔隙结构及表面化学性质不同,其中WS_iso的累积孔体积较大,为0.130 8cm³/g,WS_var的含氧表面官能团数量和种类较多;在相同吸附条件下,WS_iso的汞吸附效果整体上优于WS_var;汞初始浓度、CO₂和O₂浓度的升高会对生物炭汞吸附性能起到促进作用;随着吸附温度和SO₂浓度的升高,生物炭的吸附性能有所下降。更多还原

【Abstract】 In order to obtain the mercury adsorption characteristics of biochar under different adsorption conditions including initial mercury concentration,adsorption temperature and gas components（concentration of O₂,CO₂and SO₂）,the biochar of walnut shells with isothermal(WS_iso)and variable temperature(WS_var)preparation conditions were studied.The pore structures and surface functional groups were characterized by specific surface area and porosity analyzer and Fourier transform infrared spectroscopy,and the influence mechanism was investigated.Results showed that the pore structures and surface chemical properties of WS_iso and WS_var were different.The cumulative pore volume of WS_iso was larger,which was 0.130 8cm³/g.WS_varhad more oxygen-containing surface functional groups.In the same adsorption condition,the adsorption characteristics of WS_isowere better in general.The mercury adsorption ability of biochar increased along with CO₂,O₂and initial mercury concentration.The mercury adsorption ability of biochar decreased with the increase of adsorption temperature and SO₂concentration.更多还原