Sorption of sulphamethoxazole by the biochars derived from rice straw and alligator flag.
Environ Technol
; 36(1-4): 245-53, 2015.
Article
in En
| MEDLINE
| ID: mdl-25413119
ABSTRACT
The sorption ability of sulphamethoxazole (SMX) by biochar derived from rice straw (RS) and alligator flag (AF) at 600°C was studied to assess the ability of biochar as adsorbent to remove SMX from aqueous solution. The results indicated that sorption of SMX by biochars was well described using the Langmuir equation (R2>0.94), and the maximum sorption parameter (Q) of RS (3650â
mg kg(-1)) was much higher than that of AF (1963â
mg kg(-1)). Temperature had no effect on SMX sorption by biochars, while thermodynamics analysis indicated that the sorption of SMX on both biochars was a spontaneous physical process. The d 250 RS (diameter of RS sieved through 250â
µm) and d 150 AF (diameter of AF sieved through 150â
µm) showed excellent sorption ability for SMX. The sorption amount of RS was larger than that of AF when pH<7, whereas, the sorption amount of AF surpassed RS when pH≥7. The presence of Cu2+ and/or Cd2+ ion at low concentrations (20â
mg L(-1)) significantly (P<0.05) increased the sorption of SMX on both RS and AF. Our study confirms that biochar derived from the wetland plants could be used as effective adsorbents to remove SMX from aqueous solution.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oryza
/
Sulfamethoxazole
/
Water Pollutants
/
Ultrafiltration
/
Charcoal
/
Marantaceae
Language:
En
Journal:
Environ Technol
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2015
Document type:
Article