Abstract
Trichloroethylene (TCE) is one of the most hazardous organic pollutants in groundwater. Biochar produced from agricultural waste materials could serve as a novel carbonaceous adsorbent for removing organic contaminants from aqueous media. Biochars derived from pyrolysis of soybean stover at 300 °C and 700 °C (S-300 and S-700, respectively), and peanut shells at 300 °C and 700 °C (P-300 and P-700, respectively) were utilized as carbonaceous adsorbents to study batch aqueous TCE remediation kinetics. Different rate-based and diffusion-based kinetic models were adopted to understand the TCE adsorption mechanism on biochars. With an equilibrium time of 8-10 h, up to 69 % TCE was removed from water. Biochars produced at 700 °C were more effective than those produced at 300 °C. The P-700 and S-700 had lower molar H/C and O/C versus P-300 and S-300 resulting in high aromaticity and low polarity accompanying with high surface area and high adsorption capacity. The pseudo-second order and intraparticle diffusion models were well fitted to the kinetic data, thereby, indicating that chemisorption and pore diffusion were the dominating mechanisms of TCE adsorption onto biochars.
| Original language | English |
|---|---|
| Pages (from-to) | 8364-8373 |
| Number of pages | 10 |
| Journal | Environmental Science and Pollution Research |
| Volume | 20 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2013 Apr 23 |
| Externally published | Yes |
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Keywords
- Black carbon
- Charcoal
- Crop residue
- Proximate analysis
- Slow pyrolysis
- Sorption dynamics
ASJC Scopus subject areas
- Environmental Chemistry
- Pollution
- Health, Toxicology and Mutagenesis
Cite this
Modeling adsorption kinetics of trichloroethylene onto biochars derived from soybean stover and peanut shell wastes. / Ahmad, Mahtab; Lee, Sang Soo; Oh, Sang Eun; Mohan, Dinesh; Moon, Deok Hyun; Lee, Young Han; Ok, Yong Sik.
In: Environmental Science and Pollution Research, Vol. 20, No. 12, 23.04.2013, p. 8364-8373.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Modeling adsorption kinetics of trichloroethylene onto biochars derived from soybean stover and peanut shell wastes
AU - Ahmad, Mahtab
AU - Lee, Sang Soo
AU - Oh, Sang Eun
AU - Mohan, Dinesh
AU - Moon, Deok Hyun
AU - Lee, Young Han
AU - Ok, Yong Sik
PY - 2013/4/23
Y1 - 2013/4/23
N2 - Trichloroethylene (TCE) is one of the most hazardous organic pollutants in groundwater. Biochar produced from agricultural waste materials could serve as a novel carbonaceous adsorbent for removing organic contaminants from aqueous media. Biochars derived from pyrolysis of soybean stover at 300 °C and 700 °C (S-300 and S-700, respectively), and peanut shells at 300 °C and 700 °C (P-300 and P-700, respectively) were utilized as carbonaceous adsorbents to study batch aqueous TCE remediation kinetics. Different rate-based and diffusion-based kinetic models were adopted to understand the TCE adsorption mechanism on biochars. With an equilibrium time of 8-10 h, up to 69 % TCE was removed from water. Biochars produced at 700 °C were more effective than those produced at 300 °C. The P-700 and S-700 had lower molar H/C and O/C versus P-300 and S-300 resulting in high aromaticity and low polarity accompanying with high surface area and high adsorption capacity. The pseudo-second order and intraparticle diffusion models were well fitted to the kinetic data, thereby, indicating that chemisorption and pore diffusion were the dominating mechanisms of TCE adsorption onto biochars.
AB - Trichloroethylene (TCE) is one of the most hazardous organic pollutants in groundwater. Biochar produced from agricultural waste materials could serve as a novel carbonaceous adsorbent for removing organic contaminants from aqueous media. Biochars derived from pyrolysis of soybean stover at 300 °C and 700 °C (S-300 and S-700, respectively), and peanut shells at 300 °C and 700 °C (P-300 and P-700, respectively) were utilized as carbonaceous adsorbents to study batch aqueous TCE remediation kinetics. Different rate-based and diffusion-based kinetic models were adopted to understand the TCE adsorption mechanism on biochars. With an equilibrium time of 8-10 h, up to 69 % TCE was removed from water. Biochars produced at 700 °C were more effective than those produced at 300 °C. The P-700 and S-700 had lower molar H/C and O/C versus P-300 and S-300 resulting in high aromaticity and low polarity accompanying with high surface area and high adsorption capacity. The pseudo-second order and intraparticle diffusion models were well fitted to the kinetic data, thereby, indicating that chemisorption and pore diffusion were the dominating mechanisms of TCE adsorption onto biochars.
KW - Black carbon
KW - Charcoal
KW - Crop residue
KW - Proximate analysis
KW - Slow pyrolysis
KW - Sorption dynamics
UR - http://www.scopus.com/inward/record.url?scp=84891149397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84891149397&partnerID=8YFLogxK
U2 - 10.1007/s11356-013-1676-z
DO - 10.1007/s11356-013-1676-z
M3 - Article
VL - 20
SP - 8364
EP - 8373
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
SN - 0944-1344
IS - 12
ER -