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Orientador(es)
Resumo(s)
The continuous growth of world population together with the strong urbanization has triggered an
increasing demand for freshwater which has resulted in a serious deterioration of water bodies1. Water
pollution with pharmaceutical drugs is becoming a relevant problem. The concentration of nonsteroidal
anti-inflammatory drugs, estrogens, personal care products, among others, in waterways is
reaching hazardous levels, posing a threat to the environment and human health. Moreover,
conventional cleaning and degradation processes applied on wastewater treatment plants are
inefficient to eliminate or remove these compounds. Adsorption is a treatment process considered as
effective process used to remove micropollutants such as pharmaceutical drugs from wastewaters2,3.
This work will present the main experimental results obtained for the removal of naproxen, a
representative anti-inflammatory drug, from water by adsorption using activated carbon obtained
from olive stone. From the raw material, four different types of activated carbon adsorbent were
prepared and characterized. The equilibrium adsorption isotherms were measured using the batch
method. The most significant adsorption parameters were optimized, such as the solution pH, mass of
the adsorbent, contact time and temperature. The physicochemical characterization of the pyrolyzed
material shows a considerable superficial area of 608 m2/g when compared with other natural
biomass-based materials. The adsorbent with the better performance allowed, using a contact time of
24 hr and a solution pH of 4.5, a removal efficiency of 100%. The Langmuir model was used to better
described the adsorption behavior with the highest maximum adsorption capacity value of 35.2 mg
naproxen/g adsorbent. The kinetics of the adsorption is well described by a pseudo-second order
model.
Descrição
Palavras-chave
Removal of naproxen Research Subject Categories::TECHNOLOGY
Contexto Educativo
Citação
Milani, Eduardo C.; Reis, Vinícius de Assis; Brito, Paulo; Queiroz, Ana; Ribeiro, António E. (2022). Removal of naproxen from water using adsorbents obtained from low-cost materials. In Livro de Resumos do 12º Encontro Nacional de Cromatografia & XIV WARPA. Aveiro
Editora
Sociedade Portuguesa de Química