Sorption of tetracycline on H2O2-modified biochar derived from rape stalk. Issue 1 (1st January 2019)

• Record Type: Journal Article
• Authors: Tan, Zhenzhen; Zhang, Xueyang; Wang, Liping; Gao, Bin; Luo, Junpeng; Fang, Ru; Zou, Weixin; Meng, Na
• Is Part Of: Environmental pollutants & bioavailability. Volume 31:Issue 1(2019)
• Page Start: 198
• Page End: 207
• Publication Date: 2019-01-01
• Subjects: Biochar -- antibiotic -- tetracycline -- sorption -- H2O2 -- rape stalk; Pollution -- Periodicals; Bioavailability -- Periodicals; Environmental chemistry -- Periodicals; Pollution; Environmental chemistry; Bioavailability; Periodicals; Electronic journals; 577.27
• DOI: 10.1080/26395940.2019.1607779
• Languages: English
• ISSNs: 2639-5932

Abstract

ABSTRACT: To determine the sorption potential and mechanisms of tetracycline (TC) on pristine and H2 O2 -modified biochars, rape stalk biochars were produced and modified by H2 O2 . The specific surface area and pore volume of biochars increased with improving pyrolysis temperature, while the acidic groups decreased. Moreover, modified by H2 O2, much more oxygen-containing functional groups were introduced. The results of sorption dynamics and isothermals tests showed that RB300 had the largest TC sorption capacity of 35.90 mg/g, which was ascribed to a plenty of non-carbonized organic matter and surface functional groups were retained. Modified by H2 O2, the sorption of TC on biochars was enhanced which indicated the dominated sorption mechanisms were H-bonding and π–π electron donor acceptor interaction. The pH value would impact on sorption, and the maximum sorption capacity was obtained at pH = 9.0. Both cation concentration and type would affect the TC sorption.