Saltar al contenido
Merck
  • Heavy metal and phenol adsorptive properties of biochars from pyrolyzed switchgrass and woody biomass in correlation with surface properties.

Heavy metal and phenol adsorptive properties of biochars from pyrolyzed switchgrass and woody biomass in correlation with surface properties.

Journal of environmental management (2013-03-05)
Yanxue Han, Akwasi A Boateng, Phoebe X Qi, Isabel M Lima, Jianmin Chang
RESUMEN

In this work, the surface structures of biochars, derived from three types of biomass, switchgrass (SG), hardwood (HW) and softwood (SW) through either fast pyrolysis (FP) in a fluidized-bed reactor (at 500 °C) or slow pyrolysis (at 500° and 700 °C), were studied in detail, and compared with that of the activated carbons obtained by steam activation of the slow pyrolyzed biochars (at 500 °C). The surface acidic functional groups were determined quantitatively by the Boehm Titration method. The adsorptive properties of heavy metals, Zn(2+) and Cu(2+) onto the biochars and the activated carbons were investigated by the adsorption isotherms and SEM images, and correlated with the surface properties. ATR-FTIR and GC techniques were used to analyze the adsorptive behavior of phenol onto the biochars and activated carbons, and the results demonstrated that phenol adsorption capability is directly proportional to the micropore surface area as well as the combined level of the accessible carboxylic and lactonic groups. The relative adsorption capacity with respect to the biomass precursor follows the order: SW > HW > SG.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
Fenol solution, BioReagent, Equilibrated with 10 mM Tris HCl, pH 8.0, 1 mM EDTA, for molecular biology
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, ≥99%
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol solution, BioReagent, Saturated with 0.01 M citrate buffer, pH 4.3 ± 0.2, for molecular biology
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Supelco
Fenol solution, certified reference material, 500 μg/mL in methanol
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, BioUltra, for molecular biology, TE-saturated, ~73% (T)
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Supelco
Fenol solution, 5000 μg/mL in methanol, certified reference material
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, puriss. p.a., ACS reagent, reag. Ph. Eur., 99.0-100.5%
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol solution, ≥89.0%
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, for molecular biology
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, puriss., ≥99.5% (GC), meets analytical specification of Ph. Eur., BP, USP, crystalline (detached)
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Supelco
Fenol, Pharmaceutical Secondary Standard; Certified Reference Material
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, BioXtra, ≥99.5% (GC)
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, contains hypophosphorous as stabilizer, loose crystals, ACS reagent, ≥99.0%
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, unstabilized, ReagentPlus®, ≥99%
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Supelco
Fenol, PESTANAL®, analytical standard
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, ≥96.0% (calc. on dry substance, T)
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, unstabilized, purified by redistillation, ≥99%
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Supelco
Fenol solution, 100 μg/mL in acetonitrile, PESTANAL®, analytical standard
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, puriss., meets analytical specification of Ph. Eur., BP, USP, 99.5-100.5% (GC)
En este momento no podemos mostrarle ni los precios ni la disponibilidad
Sigma-Aldrich
Fenol, BioUltra, for molecular biology, ≥99.5% (GC)
En este momento no podemos mostrarle ni los precios ni la disponibilidad