The effectiveness of synthetic aqueous Methylene Blue dye adhering to Activated Carbon Merremia emarginata (ACME) was investigated in this study. The effects of important variables on the outcomes, such as agitation time, pH, adsorbent dosage, and other ionic concentration, were assessed. It has actually been done to evaluate the equilibrium isotherm models, thermodynamic variables, and kinetic data. Adsorption equilibrium isotherms were expressed using the Freundlich and Langmuir adsorption models, although it was found that the Langmuir model more accurately reflected the experimental results. The pseudo second order kinetic model can also make the adsorption more understandable. The goal of the survey was to determine whether it was possible to remove Methylene Blue dye from synthetic aqueous solution utilizing ACME as a cheap adsorbent.

The adsorption characteristics study on the removal of therapeutic drug ibuprofen on the acid digested carbon of waste leather were analysed by varying the physico-chemical conditions. The minimum particle size gives maximum number of surface area and adsorbed more, 91.25% for 0-63 micron. Acidic pH ranges were optable for the adsorption of ibuprofen on this ADCL. But different adsorbates preferred different acidic pH ranges of pH from 1 – 6. In this case at pH 5, 93.1% of adsorption takes place. The percentage of adsorption of ibuprofen is directly proportional to the adsorbent dosage and contact time and inversely proportional to the initial concentration of the adsorbate were found out from this study. Order of this adsorption is pseudo second order kinetics and it belongs to the physisorption, because of no chemical bond formation between the adsorbent and adsorbate. The fruendlich and Langmuir isotherm model is fit for these studies. The thermodynamic study reveals the negative Go and positive Ho and So values concluded that this adsorption is spontaneous, feasible and physical in nature respectively. The spectral evidence from the FT-IR, SEM and XRD are in favour of above experimental results.

Among the most significant industrial pollutants are dyes, notably in the textile industry. Many techniques have been put forth to remove colour from wastewater, but adsorption is the most widely accepted since it can be applied on a broad scale. The Malachite Green dye has been removed from aqueous settings using this work’s application of Modified Activated Lagenaria siceraria Stem Nano Carbon (ALSNC). The effects of pH, contact time, starting concentration, and adsorbent quantity were taken into account. Pseudo-first order, pseudo-second order, and intra-particle diffusion kinetic models were among those utilised to examine the mechanism of the adsorption process. Additionally, equilibrium data was fitted to the Radlich-Peterson isotherm model as well as the Langmuir, Freundlich, and Dubinin-Radushkevich, isotherm models. As a result of raising initial dye concentration, pH, and contact duration, the Malachite Green’s ability to bind to surfaces was improved, according to the results. pH 9 was the ideal level. Malachite Green dye adsorption had a qmax of 15.87 mg/g according to the Langmuir model. The Freundlich isotherm model and the pseudo-second order kinetic model obtained the best fitness when taking into account the values of R2 (0.999) and 2. This work has shown that ALSNC can be used as a cost-effective and efficient adsorbent for the removal of Malachite Green from aquatic environments