Removal of acetaminophen from synthetic wastewater in a fixed-bed column adsorption using low-cost coconut shell waste pretreated with NaOH, HNO3, ozone, and/or chitosan.
J Environ Manage
; 226: 365-376, 2018 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-30138836
ABSTRACT
Acetaminophen (Ace) is a trace pollutant widely found in sewage treatment plant (STP) wastewater. We test the feasibility of coconut shell waste, a low cost adsorbent from coconut industry, for removing Ace from synthetic solution in a fixed-bed column adsorption. To enhance its performance, the surface of granular activated carbon (GAC) was pre-treated with NaOH, HNO3, ozone, and/or chitosan respectively. The results show that the chemical modification of the GAC's surface with various chemicals has enhanced its Ace removal during the column operations. Among the modified adsorbents, the ozone-treated GAC stands out for the highest Ace adsorption capacity (38.2â¯mg/g) under the following conditions 40â¯mg/L of Ace concentration, 2â¯mL/min of flow rate, 45â¯cm of bed depth. Both the Thomas and the Yoon-Nelson models are applicable to simulate the experimental results of the column operations with their adsorption capacities ozone-treated GAC (20.88â¯mg/g)â¯>â¯chitosan-coated GAC (16.67â¯mg/g)â¯>â¯HNO3-treated GAC (11.09â¯mg/g)â¯>â¯NaOH-treated GAC (7.57â¯mg/g)â¯>â¯as-received GAC (2.84â¯mg/g). This suggests that the ozone-treated GAC is promising and suitable for Ace removal in a fixed-bed reactor.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Purificação da Água
/
Acetaminofen
Tipo de estudo:
Health_economic_evaluation
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article