Properties of the plant- and manure-derived biochars and their sorption of dibutyl phthalate and phenanthrene.

ABSTRACT: 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 CO?-surface area (CO?-SA) of PLABs was remarkably high relative to ANIBs. OC and aromatic C were two key factors influencing the CO?-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 ?-? interaction play an important role in the adsorption of PHE by biochars. High CO?-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.

SUBMITTER: Qiu M 

PROVIDER: S-EPMC4055907 | biostudies-other | 2014

REPOSITORIES: biostudies-other