Pyrolysis condition affected sulfamethazine sorption by tea waste biochars

Anushka Upamali Rajapaksha, Meththika Vithanage, Ming Zhang, Mahtab Ahmad, Dinesh Mohan, Scott X. Chang, Yong Sik Ok

Research output: Contribution to journalArticle

143 Citations (Scopus)

Abstract

Sulfamethazine (SMT) as a veterinary drug has been detected frequently in the environment. In this study, six biochars produced from tea waste (TW) at 300 and 700°C with or without N2 and steam activation were characterized and evaluated for SMT sorption in water. The sorption of SMT was interpreted as a function of biochar production condition, SMT concentration, pH and physicochemical characteristics of biochar. Distribution coefficient data showed high sorption of SMT at low pH (~3) and the highest sorption density of 33.81mgg-1 was achieved by the steam activated biochar produced at 700°C. The steam activation process increased the adsorption capacity by increasing the surface area of the biochar. The π-π electron donor-acceptor interaction, cation-π interaction and cation exchange at low pH were the primary mechanisms governing SMT retention by biochars. Overall, steam activated tea waste biochar could be a promising remedy of SMT removal from water.

Original languageEnglish
Pages (from-to)303-308
Number of pages6
JournalBioresource technology
Volume166
DOIs
Publication statusPublished - 2014 Aug

Keywords

  • Black carbon
  • Charcoal
  • Emerging contaminant
  • Low cost adsorbent
  • Veterinary antibiotics

ASJC Scopus subject areas

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

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    Rajapaksha, A. U., Vithanage, M., Zhang, M., Ahmad, M., Mohan, D., Chang, S. X., & Ok, Y. S. (2014). Pyrolysis condition affected sulfamethazine sorption by tea waste biochars. Bioresource technology, 166, 303-308. https://doi.org/10.1016/j.biortech.2014.05.029