Abstract
The presence of pharmaceuticals in the environment has increased. These pollutants are toxic and non-biodegradable. Piroxicam (PRX) is a non-steroidal anti-inflammatory drug that ends up in wastewater via pharmaceutical industry activities and human being consumption. This work aimed to study the pharmaceutical pollutant removal from wastewater using agricultural by-products as low-cost adsorbent material. Different parameters were studied, such as time, initial adsorbate concentrations, and temperature. The study of the initial concentration-effect shows that the greatest amount of adsorbed is observed in low concentrations. The temperature has shown a negative effect in this study. The kinetics show that after 45min, the equilibrium is obtained; that means the exhaustion of all active sites. The representative model of this adsorption is the Langmuir isotherm according to the regression coefficient, which is equal to 0.99. The natural abundance of this material and the low cost of investment could offer a good alternative to other more expensive adsorbents such as activated carbon.
Highlights
In recent years, Modernization and population growth have contributed to the contamination of water sources by new chemical products, which have led to a large number of environmental problems [1, 2]
The present study aims to carry out an experimental investigation to remove piroxicam from an aqueous solution using treated artichoke waste as an adsorbent alternative
To study the adsorption kinetics of piroxicam onto treated artichoke waste (TAW), the experiment was conducted under these operating conditions [31] (Adsorbent dose=2g/L, pH=3, T=20°C, and Piroxicam =10mg/L)
Summary
Modernization and population growth have contributed to the contamination of water sources by new chemical products, which have led to a large number of environmental problems [1, 2]. The existence of a suitable technique for the removal of these pollutants from wastewater is a challenge One of these pharmaceuticals is piroxicam, which is used as a non-steroidal anti-inflammatory drug to reduce symptoms of fever, rheumatic disease, and pain [12]. This medication is consumed in large quantities each year and is getting it in wastewater in the amounts of ng/L or μg/L, which indicate a high level of environmental toxicity according to the literature [13]. Despite the availability of all these techniques for the removal of organic pollutants, the adsorption process remains the best because of its high efficiency and effectiveness, low cost, easy to operate [20]. Kinetic and isotherm studies were performed to determine the equilibrium time and the adsorption type
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