Qiu Mengyi, Sun Ke, Jin Jie, Gao Bo, Yan Yu, Han Lanfang, Wu Fengchang, Xing Baoshan
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
Sci Rep. 2014 Jun 13;4:5295. doi: 10.1038/srep05295.
The properties of plant residue-derived biochars (PLABs) and animal waste-derived biochars (ANIBs) obtained at low and high heating treatment temperatures (300 and 450°C) as well as their sorption of dibutyl phthalate (DBP) and phenanthrene (PHE) were investigated in this study. The higher C content of PLABs could explain that CO₂-surface area (CO₂-SA) of PLABs was remarkably high relative to ANIBs. OC and aromatic C were two key factors influencing the CO₂-SA of the biochars. Much higher surface C content of the ANIBs than bulk C likely explained that the ANIBs exhibited higher sorption of DBP and PHE compared to the PLABs. H-bonding should govern the adsorption of DBP by most of the tested biochars and π-π interaction play an important role in the adsorption of PHE by biochars. High CO₂-SA (>200 m(2) g(-1)) demonstrated that abundant nanopores of OC existed within the biochars obtained 450°C (HTBs), which likely result in high and nonlinear sorption of PHE by HTBs.
本研究考察了在低温和高温热处理温度（300℃和450℃）下获得的植物残渣衍生生物炭（PLABs）和动物粪便衍生生物炭（ANIBs）的性质，以及它们对邻苯二甲酸二丁酯（DBP）和菲（PHE）的吸附情况。PLABs较高的碳含量可以解释其相对于ANIBs具有显著更高的CO₂比表面积（CO₂-SA）。有机碳（OC）和芳香碳是影响生物炭CO₂-SA的两个关键因素。ANIBs的表面碳含量比总碳含量高得多，这可能解释了与PLABs相比，ANIBs对DBP和PHE表现出更高的吸附。氢键作用应该是大多数受试生物炭吸附DBP的主要机制，而π-π相互作用在生物炭吸附PHE过程中起重要作用。较高的CO₂-SA（>200 m² g⁻¹）表明，在450℃下获得的生物炭（高温生物炭，HTBs）中存在丰富的OC纳米孔，这可能导致HTBs对PHE的高吸附和非线性吸附。
