| Autor: |
UGYA, A. Y., IMAM, T. S., HUA, X., MA, J. |
| Předmět: |
|
| Zdroj: |
Applied Ecology & Environmental Research; 2019, Vol. 17 Issue 6, p13075-13087, 13p |
| Abstrakt: |
The invasive nature of Eichhornia crassipes, Pistia stratiotes, and Nymphaea lotus is worrisome because they tend to dominate the economic and ecological region of the aquatic environment, hence the need for their eco-friendly utilization. This research is aimed at assessing the efficacy of Eichhornia crassipes, Pistia stratiotes and Nymphaea lotus as a low-cost absorbent for the biosorption of Nickel (Ni2+) from refinery wastewater. Refinery wastewater was collected from the effluent point of Kaduna Refining and Petrochemical Company (KRPC). The selected macrophytes were characterized using Fourier transform infrared (FTIR) spectroscopy. Biosorption of Ni2+ from the wastewater and aqueous Ni2+ solution was performed under factors such as contact time, particle size, absorbent dosage, pH and Ni2+ concentration. The Langmuir equation and Freundlich isothermal were used in determining absorption equilibrium while pseudo-first and pseudo-second-order were used to determined adsorption kinetics. The result obtained shows that Ni2+ absorption by the selected macrophytes is greatly influenced by contact time, particle size, absorbent dosage, pH and Ni2+ concentration with high efficiency recorded in the removal of Ni2+ from refinery wastewater. Both Langmuir equation and Freundlich isothermal gives a nearly perfect fitting for adsorption of Ni2+ for all the selected macrophytes signifying favorable Ni2+ absorption. Pseudo-second-order kinetic model gives nearly perfect fitting than the pseudo secondorder kinetic model signifying that adsorption of Ni2+ by the selected macrophytes is due to the physical and chemical reaction. The selected macrophyte can be effectively utilized as low-cost biosorbents for the removal of Ni2+ from Refinery wastewater. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
