Effective removal of remazol brillinat orange 3R using a biochar derived from Ulva reticulata

Azo dye is a synthetic aromatic dye which are direct dye frequently used in textile industry to colour fibres. It also contributes to the damage of the environment. This study examines the adsorption biochar made from Annona reticulata to remove azo dye from textile wastewater. To improve the adsorption capacity, biochar valorized by chitosan molecules, Investigations were conducted on the use of chitosan-based materials that are acid-resistant for azo dye adsorption. In the batch experiment, basic operating parameters such as initial Azo dye concentrations, pH, contact time and bed height were assessed. The percentage removal efficiency for Azo dye was recorded as 67.18%, 75.88% and 94.37% for three dissimilar sized columns that were 6cm, 8cm, and 10cm. The UV–visible absorption spectroscopy was used to quantify the decolorization of dyes. The changed surface properties of the adsorbent produced from Annona reticulata were characterized by using SEM, XRD, and FTIR. The effectiveness of the column's adsorption was calculated mathematically by Yoon-Nelson, Thomas, and Adams-Bohart models. The model that best represents equilibrium isotherm data by adsorption had R2 values of 94.63, 86.67 and 96.35 respectively.

Section: Introductionmentioning

confidence: 99%

Valorization of Annona reticulata biochar by chitosan for the adsorption of Azo dye from Textile effluent

2023

“…The effects of heavy metal poisoning can be irreversible and lifethreatening. Most heavy metals are absorbed, stored, and even accumulate in the human body, causing persistent problems [4]. Hence, before releasing waste aqueous solution into the environment, these heavy metals from industrial influents must be removed.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and adsorption capacity of biochar derived from Tamarindus indica shell for the removal of heavy metal

2023

Tamarindus indica shell biochar is employed as an alternate adsorbent precursor for the removal of heavy metal ions from aqueous solutions. It investigated the Tamarindus indica shell biochar's capacity to absorb chromium (Cr), copper (Cu), and Lead (Pb). This study showed the extensive explored how biosorption experimental limitations counting primary metal attentiveness, adsorbent dosage, temperature, and contact time affect the process. The complete analysis of the Tamarindus indica shell's adsorption capability with respect to chromium, copper, and nickel removal was conducted using a batch adsorption procedure. Determining the amount of heavy metal removal in the aqueous solution proceeded by Gas Chromatography (GC). The experimental data analyzed using the Yoon Nelson and Thomson models to regulate the equilibrium isotherms. The optimal parameters for the overall adsorption model were determined by using ANOVA. Investigate the adsorbent's surface area to determine the presence of heavy metal presents using SEM, XRD, and FTIR techniques. Each researched heavy metal's adsorption capability is listed below: Cr = 6.07 mg/L, Cu = 5.53 mg/L and Pb = 5.497mg/L with a removal percentage of 64%, 92% and 78%, respectively. The results showed that biochar generated from Tamarindus indica shells is an effective adsorbent for removing copper from aqueous solutions but not a viable biosorbent for removing chromium. Also, the regenerated column's adsorption capability was examined. The outcomes of the research demonstrated that bio-char, which produced from Tamarindus indica shell can be employed as an efficient and reasonably priced adsorbent to remove heavy metal ions from aqueous solutions.

“…Many pollutants such as heavy metals, pharmaceutical compounds, organic substances, pesticides, chemicals and more importantly, dyes. Dye pollution is of major concern as the majority of the industry utilizes dye in one form or the other and are not keen on treating its effluent for the removal of dyes (Jayaraju et al, 2021;Gokulan et al, 2018;Sivarethinamohan et al, 2021). Amongst these industries, the textile industry is the industry that utilizes a tremendous quantity of water and dyes in their process and let out wastewater containing a huge amount of untreated dye and other chemicals.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of spent macroalgae biochar for removal of Acid Red 88 (AR) dye from its aqueous solution

2022

Biochar was synthesized from Kappaphycus alvarezii reject (KR) remove the anionic azo dye, Acid Red 88 from wastewater. In this study, biochar was experimented in both batch and column adsorption studies. Batch adsorption studies were performed at varying temperature (25 – 40 °C), dosage (1 – 10 g), pH (4 – 10), time (30 – 90 min) and dye concentration (25 – 125 mg/L) respectively. From the batch adsorption studies, it was seen that maximum removal efficiency was 87.64% at 75ppm, dosage of 4 g/L, time of 60 min and pH 7 respectively. The batch adsorption experiment best fitted to Freundlich isotherm model with Pseudo-second-order kinetics indicating the adsorption to follow chemisorption mechanism process along with multilayer adsorption onto biochar’s uneven adsorption sites. It was clear from this study, that Kappaphycus alvarezii reject has the potential to serve as economical biochar as it can be utilized as an adsorbent for the efficient removal of colorants from wastewater.