Sorption and transport of sulfamethazine in agricultural soils amended with invasive-plant-derived biochar

Meththika Vithanage, Anushka Upamali Rajapaksha, Xiangyu Tang, Sören Thiele-Bruhn, Kye Hoon Kim, Sung Eun Lee, Yong Sik Ok

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

Sulfonamides (SAs) are one of the most frequently used antibiotics in the veterinary industry, showing high mobility in soils. Objectives of this research were to determine the sorption, distribution coefficients and involvement of different ionic forms of sulfamethazine (SMZ), a representative SAs, and to evaluate the transport of SMZ in biochar treated soils. Biochars were produced from an invasive plant, burcucumber (Sicyos angulatus L.), under slow pyrolysis conditions at peak temperatures of 300°C (biochar-300) and 700°C (biochar-700), respectively. The abilities of the biochars to retain SMZ in loamy sand and sandy loam soils were examined under different pHs and SMZ loadings. Soil column experiments were performed with and without biochars addition. Results showed that biochar-700 had a high degree of SMZ retention, with resultant decreased pH in both soils. Modeled effective sorption coefficients (KD,eff) values indicated that the observed high SMZ retention at pH 3 could be attributed to the π-π electron donor-acceptor interaction and electrostatic cation exchange, whereas at pH 5 and 7, cation exchange was the main mechanisms responsible. There was no temporal retardation of SMZ in biochar treated soil as compared to the untreated soil. However, biochar-700 treatment achieved up to 89% and 82% increase in the SMZ retention in sandy loam and loamy sand soils, respectively. The overall results demonstrated that burcucumber biochar produced at higher temperature was effective in reducing the mobility of SMZ in the studied soils.

Original languageEnglish
Pages (from-to)95-103
Number of pages9
JournalJournal of Environmental Management
Volume141
DOIs
Publication statusPublished - 2014 Aug 1
Externally publishedYes

Keywords

  • Biosorption
  • Black carbon
  • Charcoal
  • Emerging contaminants
  • Pharmaceuticals
  • Soil organic matter

ASJC Scopus subject areas

  • Environmental Engineering
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

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