Removal of Remazol Black B dye using bacterial cellulose as an adsorbent

Abstract

Effluents from textile processes, when discarded of inappropriately, have been shown to be a major environmental concern. In this way, different methods can be used, among them adsorption is an economical and efficient technique in the removal of dyes. Therefore, we propose to analyze the adsorptive capacity of bacterial cellulose (CB) against effluents containing the dye Remazol Black B (RBB). CB was produced by the bacterium Gluconacetobacter hansenii and characterized by the techniques of FTIR, DRX, TGA / DTG and pH (PCZ). The RBB removal tests were initially performed at different pHs. From the best experimental condition, new tests were performed at temperatures of 30, 40, 60 and 100 ± 2 °C, 150 rpm, pH 3.5, using 0.5 g of adsorbent in the concentrations of dye from 25 to 65 mg•L -1 . The kinetic study showed that the system balance was achieved in 80 minutes. The experimental data were better described by the pseudosecond order model. The equilibrium results showed that the experimental data fit the Langmuir model (qmax 17.513 mg•g -1 ). The thermodynamic parameters of adsorption showed that the process is exothermic, not spontaneous and also presented low system randomness. The activation energy (Ea) was 23.8 kJ•mol -1 characterizing physical adsorption. The residual water was not toxic to animal or microbial cells. Bacterial cellulose proved to be a good low-cost adsorbent, easy to acquire and which can be used in the adsorption process.

Gluconacetobacter xylinus Tarafından Üretilen Saf Bakteriyel Selülozun Kuru ve Yaş Formları ile Boya Uzaklaştırılması

“…XRD analysis (Fig. 11a) showed two peaks that refer to the presence of cellulose type 1 and 2 for BC as 22°≤ 20 ≤23°and 13°≤20 ≤15° (Leal et al, 2021). Figure 11b shows the FTIR spectrum of bacterial cellulose with characteristic peaks at around 3300, 2880, 1640, and 1057 cm -1 (Lin et al, 2013;Yim et al, 2017).…”

Biochar from Empty Date Fruit Bunch as an Adsorbent to Remove Eriochrome Black T and Methylene Blue from Aqueous Solution

“…After then 0.15 g of BEBD sorbent was added to the samples containing 50 mL of KNO3 solutions under different pH values and shaken for 24 h. After filtration, the values of pH finale (pHf) were measured using a pH meter. The PZC value of BEDB was deter-mined from the plot pHi -pHf = f (pHi) [20].…”

Bacterial cellulose: An eco-friendly low cost biomaterial for dye removal

“…Additionally, some dyes have the potential to be carcinogenic, mutagenic, and genotoxic. Methods for dye removal that have been reported include membrane filtration, ozone treatment, chemical coagulation, reverse osmosis, ion exchange, photochemical treatment, biological treatment, and adsorption [4,5,6]. Among all these methods, adsorption is a cost-effective, efficient, and simple form of wastewater treatment.…”