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Applicability of TiO2(B) nanosheets@hydrochar composites for adsorption of tetracycline (TC) from contaminated water

Mengting, Zhu and Kurniawan, Tonni Agustiono and Avtar, Ram and Othman, Mohd. Hafiz Dzarfan and Ouyang, Tong and Yujia, Huang and Xueting, Zhang and Setia, Tjandra and Iswanto, Iswanto (2021) Applicability of TiO2(B) nanosheets@hydrochar composites for adsorption of tetracycline (TC) from contaminated water. Journal of Hazardous Materials, 405 . p. 123999. ISSN 0304-3894

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Official URL: http://dx.doi.org/10.1016/j.jhazmat.2020.123999

Abstract

We test the feasibility of TiO2(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 TiO2(B), named as ‘Composite-1', ‘Composite-2', and ‘Composite-3', respectively. A higher loading of TiO2(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 H2O2 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 H2O2 (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 TiO2(B) as a composite has added values to the waste as an adsorbent for wastewater treatment.

Item Type:Article
Uncontrolled Keywords:Antibiotics, H-bond
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:96136
Deposited By: Widya Wahid
Deposited On:04 Jul 2022 04:51
Last Modified:04 Jul 2022 04:51

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