Congo red dye adsorption on dry green pea husk: Effects of process parameters and modeling approaches
Journal Title: Environmental Health Engineering and Management Journal - Year 2024, Vol 11, Issue 3
Abstract
Background: Congo red (CR), a harmful dye present in water, requires effective removal methods. This study investigated the utilization of dry green pea husk (DGPH) and its charcoal (CGPH) as economical and eco-friendly adsorbents. Methods: Various factors, including contact time, pH, adsorbent dosage, initial concentration, and temperature, were investigated to assess their impact on the adsorption process. Also, different models (isotherms, kinetics, and thermodynamics) were compared to describe the adsorption phenomenon. Results: Equilibrium adsorption was achieved within 30 minutes for both adsorbents. The optimum pH for CR removal was determined to be 2. The adsorption capacity decreased by increasing the adsorbent dosage, whereas it increased by increasing the initial dye concentration. The Langmuir isotherm model demonstrated the best fit for DGPH, while the Freundlich model exhibited the best fit for CGPH. The pseudo-second-order model displayed a superior fit for both adsorbents. To assess the spontaneity and feasibility of the adsorption process, thermodynamic parameters including enthalpy, entropy, and Gibbs free energy were computed. The results indicated that the adsorption of CR on DGPH was endothermic and favorable at lower temperatures, whereas the adsorption on CGPH was exothermic and favorable at higher temperatures. The negative values of Gibbs free energy for the CGPH adsorbent confirmed the spontaneous nature of the adsorption process. Conclusion: The study establishes that green pea husk and its charcoal are effective and environmentally friendly alternatives for the removal of CR from water.
Authors and Affiliations
Khaled Muftah Elsherif, Abdulfattah Mohammed Alkherraz, Howell Edwards, Basma Younus Abdulsalam Mutawia
Keywords
Related Articles
- EP ID EP746494
- DOI 10.34172/EHEM.2024.27
- Views 96
- Downloads 0
Public perception on environmental noise pollution: A case study in Zaria city, Kaduna state, Nigeria
Background: One of the key indicators of the degradation of the environment is the noise level. This has necessitated this study on the evaluation of the public, perceptional awareness, sources, effects, and mitigation m...
Deployment of performance indicators toward bridging monitoring gaps in Africa’s Great Green Wall
Background: The health and productivity of the land across the Sahel are in declension due to desertification. This has lowered the quality of ecosystem services and has led to a vicious cycle of drought, famine, pover...
Treatment of tofu liquid waste using anaerobic-aerobic biofilm aeration system to reduce pollution
Background: Tofu derived from processed soybeans is popular among the public, but its production has an unfavourable effect. After all, it produces liquid waste that causes quite high pollution because it contains quit...
The use of Chlorella vulgaris in reducing the organic load of poultry slaughterhouse wastewater: Modeling and optimization of influential factors in the process
Background: Wastewater from poultry slaughterhouses is a serious environmental threat if they are incompletely treated. Recently, the utilization of microalgal species has gained significant attention for treating such...
Worldwide arsenic levels in human breast milk and probabilistic health risk assessment: A systematic review and meta-analysis
Background: The exposure to toxic metals is a major global health concern due to their stability, bioaccumulation, and high toxicity. These metals can be transmitted to the fetus through the placenta and exposure can l...