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

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

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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
Subjects:	T Technology > TD Environmental technology. Sanitary engineering
Divisions:	Poltekkes Kemenkes Yogyakarta
Depositing User:	PAK DOSEN 2020
Date Deposited:	16 Jul 2021 01:10
Last Modified:	16 Jul 2021 01:10
URI:	http://eprints.poltekkesjogja.ac.id/id/eprint/6262

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