Optimization of activated palm oil sludge biochar preparation for sulphur dioxide adsorption.
J Environ Manage
; 248: 109302, 2019 Oct 15.
Article
en En
| MEDLINE
| ID: mdl-31377539
ABSTRACT
Palm oil sludge (POS) is an organic waste generated from the palm oil industry. POS causes environmental pollution if it is improperly disposed. In this study, the potential of activated POS biochar, as an adsorbent for the removal of SO2 gas was tested. POS biochar was physically activated using CO2 gas. The effects of activation preparation variables i.e. activation temperature (300-700⯰C), activation time (30-150â¯min) and CO2 flow rate (100-500â¯ml/min) were investigated using design expert version 8.0.7.1 software. Central Composite Design (CCD) was used to develop a quadratic model to correlate the operating variables with the activated biochar adsorption capacity. Analysis of variance (ANOVA) was performed to identify the significant factors on the experimental design response. The optimum preparation conditions of activated POS biochar were found to be at activation temperature of 442⯰C, activation time of 63â¯min and CO2 flow rate of 397â¯ml/min. The maximum adsorption capacity at the optimum conditions was recorded as 16.65â¯mg/g. The adsorption capacity increased significantly after the activation process. Characteristics of the activated POS biochar proposed that SO2 was physically adsorbed. Furthermore, it was found that the adsorption capacity can be further enhanced by increasing the reaction temperature to 100⯰C or with 15% of relative humidity in the inlet gas. The prepared adsorbents can be regenerated by thermal treatment.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aguas del Alcantarillado
/
Dióxido de Azufre
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Environ Manage
Año:
2019
Tipo del documento:
Article
País de afiliación:
Malasia