Using Solar-TiO2 and Biocarbon to Decompose and Adsorb Amoxicillin from Polluted Waters

Abstract

Surface water discharge of domestic sewage poses a treat mostly due to antibiotics content as amoxicillin. Its environmental presence provides the bacterial resistance enhancement and disturbance in aquatic life. The biocarbon is an organic carbon compound obtained by biomass pyrolisis at 300 o C to 750 o C under low oxygen environment. It is an effective adsorbent derived from agricultural and industrial solid biomass also frequently used to remove various pollutants, including dyes, pesticides, organic compounds and heavy metals from aqueous solutions. The importance of this natural material rises as low cost abundant and renewable alternative to activated carbon used on wastewater treatment application. Several technologies are employed to modify crude precursors on biocarbon preparation including chemical, physical and biological treatments with the addition of functional groups. The raw biomass material also provides some radicals and humic acids with promising water adsorbent results. The integrated process of the efficient Solar-TiO 2 photodecomposition followed by biocarbon adsorption resulted on 94% of amoxicillin removal percentage and avoids the toxic treatment sludge production.

EPs Antibiotics: Photodecomposition and Biocarbon Adsorption

“…The use of the experimental results allows performing the kinetics calculations [11][12][13], using Eqs. (1)-(3).…”

Oxytetracycline Water Contamination Treated with Biocarbon TiO2 and Solar Photodecomposition

“…The titanium dioxide (TiO 2 ) synthesis using the hydrolysis process is very ef-Journal of Agricultural Chemistry and Environment fective, but, in many cases, results in powder agglomerates formed during the standard drying process. The use of eucalyptus biocarbon during the TiO 2 formation avoids the formation of the agglomerate and keeps the high surface area [12] [13] [14].…”

“…tion, and use in veterinarian treatment, actually with raw discharge in sewage water and water resources[13] [14].The synthesis of the TiO 2 used titanium isopropoxide in aqueous solution with the addition of acetic acid and fine eucalyptus biocarbon. The biocarbon also allows the better morphology of the TiO 2 fine particle formation and avoids the agglomeration.The TiO 2 preparation started with the titanium isopropoxide volume to a beaker filled with distilled water, acetic acid, and the correspondent biocarbon mass from 1 to 0.05 g. The amount was in the range of 1 to 5 mL for 400 mL of final suspension.…”

Yeast-TiO<sub>2</sub> Biotemplate for Oxytetracycline Solar Photodecomposition

“…In Brazil, there are no established limits for the presence of antibiotics in the environment (soil, animal manure, groundwater, surface water, drinking water, and sediment [14] [15] [16]. Thus, because of the growing concern about surface water quality issues, the development of ecologically sound and economically viable technologies for water treatment and removal of effluent drugs is essential.…”