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Thermal stability of biochar and its effects on cadmium sorption capacity.

Abstract：

:In this study, the thermal stability of a wood shaving biochar (WS, 650°C), a chicken litter biochar (CL, 550°C) and an activated carbon (AC, 1100°C) were evaluated by combustion at 375°C for 24h to remove the labile non-carbonized organic matter. Results showed that WS and CL biochars were not thermally stable and can lose most of the organic C during combustion. The combusted WS and CL biochars retained considerable amounts of negative charge and displayed higher sorption for Cd (from 5.46 to 68.9mg/g for WS and from 48.5 to 60.9mg/g for CL). The AC retained 76.5% of its original C and became more negatively chargely after combustion, but its sorption for Cd slightly decreased (from 18.5 to 14.9mg/g). This study indicated that after potential burning in wildfires (200-500°C), biochars could have higher sorption capacity for metals by remaining minerals.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Qi F,Yan Y,Lamb D,Naidu R,Bolan NS,Liu Y,Ok YS,Donne SW,Semple KT

doi

10.1016/j.biortech.2017.07.033

subject

Has Abstract

pub_date

2017-12-01 00:00:00

pages

48-56

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(17)31127-6

journal_volume

246

pub_type

杂志文章

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