Composite of methyl polysiloxane and avocado biochar as adsorbent for removal of ciprofloxacin from waters

Roberta A. Teixeira, Eder C. Lima*, Antônio D. Benetti, Pascal S. Thue, Diana R. Lima, Farooq Sher, Glaydson S. dos Reis, Navid Rabiee, Moaaz K. Seliem, Mohamed Abatal

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

11 Citeringar (Scopus)

Sammanfattning

Two carbon composite materials were prepared by mixing avocado biochar and methyl polysiloxane (MK). Firstly, MK was dissolved in ethanol, and then the biochar was added at different times. In sample 1 (R1), the time of adding biochar was immediately after dissolving MK in ethanol, and in sample 2 (R2), after 48 h of MK dissolved in ethanol. The samples were characterized by nitrogen adsorption/desorption measurements obtaining specific surface areas (SBET) of 115 m2 g−1 (R1) and 580 m2 g−1 (R2). The adsorbents were further characterized using scanning electron microscopy, FTIR and Raman spectroscopy, adsorption of vapors of n-heptane and water, thermal analysis, Bohem titration, pHpzc, and C H N elemental analysis. R1 and R2 adsorbents were employed as adsorbents to remove the antibiotic ciprofloxacin from the waters. The t1/2 and t0.95 based on the interpolation of Avrami fractional-order were 20.52 and 246.4 min (R1) and 14.00 and 157.6 min (R2), respectively. Maximum adsorption capacities (Qmax) based on the Liu isotherm were 10.77 (R1) and 63.80 mg g−1 (R2) for ciprofloxacin. The thermodynamic studies showed a spontaneous and exothermic process for both samples, and the value of ΔH° is compatible with physical adsorption.

OriginalspråkEngelska
Sidor (från-till)74823-74840
Antal sidor18
TidskriftEnvironmental Science and Pollution Research
Volym29
Nummer49
DOI
StatusPublicerad - okt. 2022
MoE-publikationstypA1 Tidskriftsartikel-refererad

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