Applicability of TiO 2 (B) nanosheets@hydrochar composites for adsorption of tetracycline (TC) from contaminated water.

Autor: Mengting Z; Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Fujian 361102, China., Kurniawan TA; Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Fujian 361102, China; Department of Energy, Environment, and Climate Change, School of Environment Resources and Development (SERD), Asian Institute of Technology (AIT), Pathumthani 12120, Thailand. Electronic address: tonni@xmu.edu.cn., Avtar R; Faculty of Environmental Earth Sciences, Hokkaido University, Sapporo 060-0810, Japan. Electronic address: ram@ees.hokudai.jp., Othman MHD; Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, University Teknologi Malaysia, 81310 Skudai, Johor, Malaysia., Ouyang T; Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Fujian 361102, China., Yujia H; Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Fujian 361102, China., Xueting Z; Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Fujian 361102, China., Setiadi T; Center for Environment Studies, Bandung Institute of Technology (ITB), Bandung 40135, Indonesia., Iswanto I; Poltekkes, Kemenkes, Yogyakarta 55293, Indonesia.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2021 Mar 05; Vol. 405, pp. 123999. Date of Electronic Publication: 2020 Sep 17.
DOI: 10.1016/j.jhazmat.2020.123999
Abstrakt: We test the feasibility of TiO 2 (B)@carbon composites as adsorbents, derived from wheat straws, for tetracycline (TC) adsorption from aqueous solutions. Hydrochar (HC), biochar (BC), and hydrochar-derived pyrolysis char (HDPC) are synthesized hydrothermally from the waste and then functionalized with TiO 2 (B), named as 'Composite-1', 'Composite-2', and 'Composite-3', respectively. A higher loading of TiO 2 (B) into the HC was also synthesized for comparison, named as 'Composite-4'. To compare their physico-chemical changes before and after surface modification, the composites are characterized using FESEM-EDS, XRD, BET, FRTEM, and FTIR. The effects of H 2 O 2 addition on TC removal are investigated. Adsorption kinetics and isotherms of TC removal are studied, while TC adsorption mechanisms are elaborated. We found that the Composite-4 has the highest TC removal (93%) at pH 7, 1 g/L of dose, and 4 h of reaction time at 50 mg/L of TC after adding H 2 O 2 (10 mM). The TC adsorption capacities of the Composite-1 and Composite-4 are 40.65 and 49.26 mg/g, respectively. The TC removal by the Composite-1 follows the pseudo-second order. Overall, this suggests that converting the wheat straw into HC and then functionalizing its surface with TiO 2 (B) as a composite has added values to the waste as an adsorbent for wastewater treatment.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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