Study of Adsorption Mechanism of Heavy Metals onto Waste Biomass (Wheat Bran)

Javaid

Adsorption Science & Technology

et al. 2021

Wastewater has a high concentration of dyes and heavy metals, which are the two most significant contaminants. Due to their high toxicity and vulnerability, they possess a potential threat to human health as well as the ecosystem. There are many ways to eliminate these pollutants from water but adsorption has attained much interest because of its low cost, easy application, and no secondary pollutants. Biomass is considered an ecological burden and a reason for the reduction in the earth’s carrying capacity. These materials may be used as cost-effective adsorbents to remove dyes and heavy metals from wastewater. This paper highlights recent advances made in dye and heavy metal adsorption in the last 10 years. The prime focus of this review paper is on the direct application of these biomasses without any chemical or physical alteration. The removal efficiencies and adsorption capabilities of different biomass-derived adsorbents for the removal of dyes and heavy metals from wastewater are summarised in this study. Additionally, the adsorption mechanisms underlying the removal of dyes and heavy metals using biomass-derived adsorbents have been discussed, with a focus on two kinetic models: pseudofirst-order and pseudosecond-order. Furthermore, the Langmuir and Freundlich isotherms were utilised to verify the experimental findings and to quantify the amount and degree of adsorption favorability. Based on what has been covered in the literature, the conclusion has been drawn. The future research needs are proposed in the area of biomass-derived adsorbent development, their modification for improved efficiencies, and application on large-scale wastewater treatment plants.

“…Ogata et al [46] conducted an experiment in which raw wheat bran (WB) was examined. The study also examined the adsorption of Pb 2+ and Cd 2+ ions on wheat bran.…”

Section: Adsorption Of Heavy Metalsmentioning

confidence: 99%

Biomass-Derived Adsorbents for Dye and Heavy Metal Removal from Wastewater

Javaid

Adsorption Science & Technology

et al. 2021

“…These observations indicate that the biosorption of the tested metal cations follows a pseudo-second-order kinetic model and suggest that the cation adsorption process is controlled by a chemical reaction that has already been successfully applied to describe heavy metal biosorption on similar biosorbents. 30,31…”

Section: Biosorbent Efficiency Evaluation Using Icp-oes Technique Eff...mentioning

confidence: 99%

Removal of heavy metals from aqueous media by sunflower husk: A comparative study of biosorption efficiency by using ICP-OES and LIBS

et al. 2022

Presented research aimed to develop an alternative approach for the estimation of biosorption capability of sunflower husk. The acid-pretreated sunflower biomass was characterized by scanning electron microscopy combined with energy dispersive X-Ray spectroscopy (SEM-EDX) analysis and Fourier transform infrared (FTIR) spectroscopy. Biosorption efficiency has been evaluated using inductively coupled plasma optical emission spectroscopy (ICP-OES) and laser-induced breakdown spectroscopy (LIBS). The adsorption capacity of the adsorbent was determined as the function of the pH of the solution, the initial concentration of heavy metal solutions, and contact time. The optimal conditions were achieved after 15 minutes of contact at pH 6, while the percentage of the removal was from 80.0-98.7 %, depending on the element. The results obtained from the kinetic and isotherm studies show that maximum adsorption of ions was quickly reached and followed the pseudo-second-order kinetic model. Real samples were tested and obtained Ni values by LIBS method were 3100 ? 200 and 1240 ? 100 mg/kg, while estimated values by the ICP-OES were 2995 ? 20 and 1130 ? 10 mg/kg, respectively. The obtained results prove that LIBS method can be used as a ?green alternative? for the evaluation of biosorption efficiency.

e-J. Surf. Sci. Nanotech.

“…Moreover, the components in each waste biomass are different. Previous studies have reported that adsorption capacity in waste biomass is related to its protein structure, lipid content, surface functional groups, among other factors [20][21][22][23][24]. Therefore, further research on the adsorption mechanism is warranted.…”

Section: Removal Of Dye and Cod By Adsorbent Treatmentmentioning

confidence: 99%

Simultaneous Removal of Dye and Chemical Oxygen Demand from Aqueous Solution by Combination Treatment with Ozone and Carbonaceous Material Produced from Waste Biomass

Ogata

Nagahashi

Kobayashi

et al. 2018

Self Cite

This paper shows the efficacy of the combination of ozonation and adsorbent treatment in removing cationic and anionic dyes (methylene blue and acid orange 7, respectively) and chemical oxygen demand (COD) from wastewater. The adsorbent was prepared with coffee ground, rice bran, and soybean bran as sources of waste biomass, and was calcined at 1000 • C. We demonstrated three methods, namely, singular ozonation, singular adsorbent treatment, and the combination of the two treatments. The removal percentage of dye and COD by ozonation was greater than that by adsorbent treatment. However, the incomplete removal of dye and COD through ozonation suggested that singular treatment is not sufficient for this purpose. Subsequently, we evaluated the combination treatment; the removal percentage of dye and COD by this treatment was higher than those from the singular treatments, which indicates that the adsorption and degradation capacities were enhanced. In addition, the calcined adsorbent could be used at least four times. These results show the novelty and utility of this treatment for the removal of dye and COD from wastewater containing dye.