Effects of pyrolysis temperature on soybean stover- and peanut shell-derived biochar properties and TCE adsorption in water

Mahtab Ahmad, Sang Soo Lee, Xiaomin Dou, Dinesh Mohan, Jwa Kyung Sung, Jae E. Yang, Yong Sik Ok

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Abstract

Conversion of crop residues into biochars (BCs) via pyrolysis is beneficial to environment compared to their direct combustion in agricultural field. Biochars developed from soybean stover at 300 and 700. °C (S-BC300 and S-BC700, respectively) and peanut shells at 300 and 700. °C (P-BC300 and P-BC700, respectively) were used for the removal of trichloroethylene (TCE) from water. Batch adsorption experiments showed that the TCE adsorption was strongly dependent on the BCs properties. Linear relationships were obtained between sorption parameters (K M and S M) and molar elemental ratios as well as surface area of the BCs. The high adsorption capacity of BCs produced at 700. °C was attributed to their high aromaticity and low polarity. The efficacy of S-BC700 and P-BC700 for removing TCE from water was comparable to that of activated carbon (AC). Pyrolysis temperature influencing the BC properties was a critical factor to assess the removal efficiency of TCE from water.

Original languageEnglish
Pages (from-to)536-544
Number of pages9
JournalBioresource technology
Volume118
DOIs
Publication statusPublished - 2012 Aug 1
Externally publishedYes

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Keywords

  • Agricultural waste
  • Biomass
  • Carbonization
  • Crop residue
  • Proximate analysis

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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