Adsorption Study and Removal of Basic Fuchsin Dye from Medical Laboratory Wastewater Using Local Natural Clay

Abstract

Local natural clay from Sulaimani zone-Takiya (TKC), Kurdistan Region of Iraq, was characterized and used for the removal of basic fuchsin (BF) dye from laboratory bacterial wastewater. The characterization of the adsorbent was carried out with XRD, XRF, and FT-IR. The clay sample was dominated by vermiculite. Adsorption tests under different conditions of contact time, pH of the solution, temperature, initial dye concentration, and adsorbent amount were performed to analyze the effect of various experimental parameters. Equilibrium time was reached within 180 minutes, and maximum BF adsorption was achieved at pH 6.8 at a temperature ranging from 20 to 50°C. The experimental data fitted the pseudo-second-order kinetic model, with the activation energy of 22.68 kJ·mol-1. Adsorption isotherms could be well-fitted by the Langmuir isotherm model. The thermodynamic parameters such as Δ G ° , Δ H ° , and Δ S ° were determined, and the negative values of Δ G ° indicated that adsorption was spontaneous at all temperatures. Furthermore, the values of Δ H ° indicated an endothermic reaction. Wastewater contaminated by BF dye from the bacterial laboratory was collected (BF concentration: 160 mg·L-1) and treated by TKC. The resulting concentration of BF after adsorption was 4.76 mg·L-1. The maximum amount of dye adsorbed is about 149.2 mg/g or 0.44 mmol/g, which is close to the range of the cation exchange capacity (CEC) value of the vermiculite which indicated that cation exchange was the dominant adsorption mechanism.

Efficient Disposal of Basic Fuchsin Dye from Aqueous Media Using ZrO2/MgMn2O4/Mg(Mg0.333Mn1.333)O4 as a Novel and Facilely Synthesized Nanocomposite

“…It was found that the uptake efficacy of BFD dye decreased, whereas the uptake capability of the KE, KE500, and KE700 adsorbents increased with increasing initial dye concentrations. The Langmuir (Equation ( 5)) in addition to the Freundlich (Equation ( 6)) equilibrium equations [16,[37][38][39][40] were operated to study the linear fitting of the obtained experimental data owing to the disposal of BFD dye by the KE, KE500, and KE700 products, as displayed in Figure 14A,B, respectively.…”

Thermally activated persulfate oxidation of Basic Fuchsin dye: Effect of different operating parameters, kinetic, and thermodynamic study

“…The parameters that affected the adsorption such as pH, contact time, temperature, adsorbent dose, and initial dye concentration were determined. The maximum amount of dye adsorbed is about 149.2 mg g −1 or 0.44 mmol g −1 26 …”

“…The maximum amount of dye adsorbed is about 149.2 mg g −1 or 0.44 mmol g −1 . 26 The present paper examined the feasibility of using HAP to remove BF from aqueous solution. The effect of various operational parameters, such as PS concentration, solution pH, and temperature on the discoloration efficiency of (BF) dye, was investigated.…”