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

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

332 Citationer (Scopus)

Resumé

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.

OriginalsprogEngelsk
Sider (fra-til)303-308
Antal sider6
TidsskriftBioresource Technology
Vol/bind166
DOI
StatusUdgivet - aug. 2014
Udgivet eksterntJa

Programområde

  • Programområde 2: Vandressourcer

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