Adsorption of rare earth elements on novel “Mg-Al layered double hydroxide with gum arabic”
Naseer, Waqar Ahmed (2018)
Diplomityö
2018
School of Engineering Science, Kemiantekniikka
Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi-fe2018101838471
http://urn.fi/URN:NBN:fi-fe2018101838471
Tiivistelmä
In the last few decades, the demand for rare earth elements has increased, as there have been further discoveries for their use. Rare earth elements are used for very specific applications and can be extracted from different ores and wastes. Conventional methods for their extraction are not economical or eco-friendly. Moreover, the currently existing technologies have environmentally unfriendly aspects.
Adsorption is a simple and economical approach for recovering rare earth elements. A selective choice over the adsorption material can make the adsorption process green and sustainable.
The following research is based on finding an appropriate biodegradable adsorbent for the removal of rare earth elements. The objectives of the research were to synthesise an efficient nanocomposite from the biodegradable source. Mg-Al layered double hydroxide (LDH) nanocomposite with gum Arabic, gives promising results for recovering Sc, La, Nd, Eu, Ce and Y from aqueous solutions.
The theoretical part of the work covers information about the properties, behaviour, demand and different ideas of the adsorption process. The experimental part comprises two parts: the first focus on different approaches to look for a bio nanocomposite adsorbent and the second part is about the characterisation and effect of the initial conditions on the adsorption process. The effect of different variables, such as time, initial concentration, dose, initial pH and temperature, were investigated in detail and the optimum conditions were enlisted.
Furthermore, the results of the research prove that Mg-Al G.A. LDH is a good adsorbent for removing rare earth elements. It has higher removal and, therefore, it can be used as an efficient adsorbent for future pilot and industrial plants.
Adsorption is a simple and economical approach for recovering rare earth elements. A selective choice over the adsorption material can make the adsorption process green and sustainable.
The following research is based on finding an appropriate biodegradable adsorbent for the removal of rare earth elements. The objectives of the research were to synthesise an efficient nanocomposite from the biodegradable source. Mg-Al layered double hydroxide (LDH) nanocomposite with gum Arabic, gives promising results for recovering Sc, La, Nd, Eu, Ce and Y from aqueous solutions.
The theoretical part of the work covers information about the properties, behaviour, demand and different ideas of the adsorption process. The experimental part comprises two parts: the first focus on different approaches to look for a bio nanocomposite adsorbent and the second part is about the characterisation and effect of the initial conditions on the adsorption process. The effect of different variables, such as time, initial concentration, dose, initial pH and temperature, were investigated in detail and the optimum conditions were enlisted.
Furthermore, the results of the research prove that Mg-Al G.A. LDH is a good adsorbent for removing rare earth elements. It has higher removal and, therefore, it can be used as an efficient adsorbent for future pilot and industrial plants.