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Study on Ni( II ) adsorption by calcium alginate beads
Author(s) -
Minh Vu Xuan,
Dung Kim Thi Trang,
Lan Pham Thi,
Hanh Le Thi My,
Dung Nguyen Tuan
Publication year - 2020
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.2019000195
Subject(s) - adsorption , calcium alginate , isothermal process , freundlich equation , desorption , nickel , calcium , langmuir , chemistry , nuclear chemistry , chemical engineering , chromatography , organic chemistry , thermodynamics , engineering , physics
Abstract Nickel is one of the toxic heavy metals, it is widely used in our daily lives, so there is a lot of risk of being released into the water to poison the human, flora, and fauna. In this study, we investigated the adsorption of Ni(II) on calcium alginate beads (CA), a natural polysaccharide with many outstanding advantages. The effects of initial pH, adsorptive times, and initial concentration of Ni(II) on the adsorption process were investigated. The results showed that the pH value of 3‐7.5 was favorable for the adsorption of Ni(II) on CA, the equilibrium adsorption started 60 minutes. The pseudo‐second order kinetic equation, both Langmuir and Freundlich isothermal models were fit to describe the experimental data. The maximum adsorption capacity reached 6.48 mg/g with wet alginate calcium beads, corresponding to 144 mg/g dry beads. Materials after adsorption were also studied desorption for reuse.