Publication
Biosorption of pharmaceuticals from wastewater using Moringa oleĆfera as biosorbent
| datacite.subject.fos | Engenharia e Tecnologia::Engenharia QuĆmica | pt_PT |
| dc.contributor.advisor | Martins, Ramiro | |
| dc.contributor.advisor | Kreutz, Cristiane | |
| dc.contributor.advisor | GaliƔn, Carlos | |
| dc.contributor.author | Olivera, Agustina Raquel de | |
| dc.date.accessioned | 2020-06-19T09:34:23Z | |
| dc.date.available | 2020-06-19T09:34:23Z | |
| dc.date.issued | 2020 | |
| dc.date.submitted | 2018 | |
| dc.description | Mestrado de dupla diplomaĆ§Ć£o com a Universidad Nacional de Missiones | |
| dc.description.abstract | Pharmaceuticals as emerging contaminants have become one of the most controversial environmental issues at global scale. Over the years, there has increased the presence of antibiotics and anti-inflammatory drugs inside rivers, lakes, oceans and even inside drinking water streams. The waste-water treatment plants (WWTPs) lack the necessary technology to remove a concentration between the range ng/l-mg/l and therefore, the need to develop new methods able to remove contaminants in an effective, low cost and environmental friendly way arises. The term āBiosorptionā appears as a possible solution. It is a separation process inside the area of Chemical Engineering that follows the same fundaments of adsorption with the only difference that uses biodegradable materials as adsorbent (biosorbent). The present work focuses on studying the potential adsorption capacity of Moringa oleĆfera (MO) to remove Diclofenac (DCF) and Oxytetracycline (OTC) from waste-water. After different experiments, it was found that in both cases (DCF and OTC) the adsorption processes present high pH dependence, the first one governed by the mechanism of chemisorption while the second one could be controlled by diffusion of the particles between both surfaces. Equilibrium isotherms were determined by Langmuir, Freundlich, and Sips models. In both cases, the adsorption process was best described by the Freundlich model (R2>0.97). Kinetics essays were described by pseudo-first-order, pseudo-second-order, and Intraparticle diffusion models. The experimental data of OTC and DCF removal were best fitted by Intraparticle Diffusion (R2>0.95) and pseudo-second-order (R2>0.93) model respectively. It was possible to obtain a removal percentage of 88% for DCF at a pH of 2 and 50% for OTC at a pH of 10, indicating that MO represents a viable option for the removal of drugs present in contaminated water. | pt_PT |
| dc.description.abstract | Los fĆ”rmacos en su papel de contaminantes emergentes, se han convertido en uno de los problemas ambientales mĆ”s preocupantes a escala global. Con el pasar de los aƱos, la presencia de antibiĆ³ticos y antiinflamatorios dentro de rĆos, lagos, ocĆ©anos e inclusive en corrientes de agua potable, ha ido aumentado. Las plantas de tratamiento de aguas residuales (ETARs) aĆŗn no cuentan con los mĆ©todos adecuados para remover concentraciones dentro del rango de ng/l-mg/l y por ello, surge la necesidad de desarrollar nuevas tecnologĆas que sean efectivas, de bajo costo y amigables con el medio ambiente. Como posible soluciĆ³n nace el tĆ©rmino de ābiosorciĆ³nā. La biosorciĆ³n es un proceso de separaciĆ³n dentro del Ć”rea de IngenierĆa QuĆmica que sigue los mismos fundamentos de la tĆ©cnica de adsorciĆ³n, con la Ćŗnica diferencia que utiliza materiales biodegradables como adsorbentes, conocidos como ābiosorbentesā. Es de gran interĆ©s en el presente trabajo, estudiar las caracterĆsticas, principales propiedades y capacidad de adsorciĆ³n que posee las cĆ”scaras de la planta Moringa oleĆfera (MO) para la remociĆ³n de Oxitetraciclina (OTC) y Diclofenac (DCF) presentes en aguas residuales. MO es reconocida mundialmente debido a sus propiedades anti-microbiales, nutricionales y coagulantes, mientras que DCF y OTC son considerados dos de los fĆ”rmacos con mayor contribuciĆ³n a la contaminaciĆ³n del medioambiente. A travĆ©s de diferentes ensayos, se encontrĆ³ que en ambos casos (DCF y OTC) se trata de procesos altamente dependientes de pH con la diferencia que el primero es gobernado por el mecanismo de quimisorciĆ³n mientras que el segundo es controlado bajo la difusiĆ³n de partĆculas entre ambas superficies.El modelo de Freundlich (R2>0.98) ha logrado, en ambos casos, el mejor ajuste de los datos empĆricos. Mientras que, en modelos de cinĆ©tica de adsorciĆ³n, el modelo de DifusiĆ³n Intraparticular presentĆ³ el mejor ajuste para el proceso de remociĆ³n de OTC (R2>0.95) y el modelo Pseudo-Segundo-orden, para la adsorciĆ³n de DCF (R2>0.93). Se ha logrado remover hasta un 88% de DCF a un pH de 2 y hasta 50% de OTC a un pH de 10, indicando que MO representa una opciĆ³n viable para la remociĆ³n de fĆ”rmacos presentes en aguas contaminadas. | pt_PT |
| dc.identifier.tid | 202486613 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10198/22123 | |
| dc.language.iso | eng | pt_PT |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/ | pt_PT |
| dc.subject | Pharmaceutical | pt_PT |
| dc.subject | Adsorption | pt_PT |
| dc.subject | Biosorption | pt_PT |
| dc.subject | Moringa oleĆfera | pt_PT |
| dc.subject | Biosorbent | pt_PT |
| dc.subject | Diclofenac | pt_PT |
| dc.subject | Oxytetracycline | pt_PT |
| dc.title | Biosorption of pharmaceuticals from wastewater using Moringa oleĆfera as biosorbent | pt_PT |
| dc.type | master thesis | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | masterThesis | pt_PT |
| thesis.degree.name | Engenharia QuĆmica | pt_PT |
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