Natural Biosorbent for Oil Adsorption from Produced Water by Sedge Cane

Abstract

The sedge cane is a year-round natural plant that is regarded as one of the most significant grasses on the planet, and it usually causes major disposal concerns. As a result, employing sedge cane as a low-cost adsorbent to remove oil from produced water is helpful from both an economic and environmental standpoint. The response surface methodology is used to investigate the reaction optimization of oil removal using the sedge cane. The tests had three independent variables: adsorbent dosage, contact time, and temperature, as well as one response variable is (oil removal percent). According to the findings, the adsorbent dosage had the biggest impact on the percentage of oil removed. The findings predicted that employing sedge cane with 5 gm/L adsorbent dosage at 40 °C and 60 min contact time, the optimum condition for oil removal would be up to 95%. Fourier transforms infrared (FTIR) and scanning electron microscopy (SEM) were used to analyze the sedge cane. The results of the Langmuir, Freundlich, Toth, and Sips isotherm models were 0.9967, 0.4166, 0.956, and 0.9062, respectively. Compared to the other models, Langmuir model best characterized the adsorption process. The reaction's kinetics were most accurately characterized by the PFO kinetic equation with 0.9382 for PFO, 0.8147 for PSO, and 0.7888 for the Elovich model. Temperature effects on thermodynamic parameters were investigated. The results of the testing showed that sedge cane is an effective adsorbent for eliminating oil from contaminated water.

Innovative Remediation of Oily Water Utilizing Environmentally Friendly Fish-Scale Biosorbents

“…This can be why the biosorbents may eventually reach equilibrium over an extended period, where the amount of oil adsorbed remains constant (Vievard et al, 2023). This is a point where the biosorbent's capacity for adsorption is fully utilized, and further contact time does not affect the removal efficiency (Alatabe et al, 2023).…”

“…The Langmuir isotherm assumes that the adsorbent surface has a limited number of active sites, and the molecules being adsorbed are not in contact with one another (Alatabe et al, 2023). The most important feature of the Langmuir isotherm is that it can be expressed in terms of a dimensionless constant factor (RL), presented by Equation 3, where Ci is the initial concentration of oil (g/L), and qm is the maximum adsorption capacity.…”