Selective recovery of indium from secondary resources by iminodiacetic acid chitosan
Yousuf, Alharith Asim Seidahmad (2019)
Diplomityö
2019
School of Engineering Science, Kemiantekniikka
Kaikki oikeudet pidätetään.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2019121046463
https://urn.fi/URN:NBN:fi-fe2019121046463
Tiivistelmä
Indium demand has escalated drastically in the last few decades, due to the technological advancement and the introduction of the high-tech products such as Liquid Display Panels and the mobile device; this demand is not attained due to the fact that Indium is not the sole products as it scares in the earth crust.
Indium extraction from the other mining processes side-streams, especially zinc mines is the most conventional method to produce indium, however the latter process has its drawbacks in terms of reagents loss, economical feasibility as well as the Eco-friendliness of the extraction is questioned.
This study was established to present an eco-friendly process to capture the indium ions from indium chloride solution via a biodegradable adsorbent. The primary objective of this study is to synthesize a bio-based adsorbent from biobased material (Chitosan) and eco-friendly functionalization of Iminodiacetic Acid (IDA), thus all of the chemicals and reagents used are of a green chemistry base.
In this work IDA functionalized chitosan adsorbent was successfully synthesized, and investigated over indium chloride solution to assess the adsorption characteristics; the pH, contact time and metal concentrations. Indium uptake of IDA-chitosan was reported as 37.9 mg/g, at pH value of 3.5. The study also revealed that the indium capture by IDA-Chitosan was predicted by the Langmuir adsorption model indicating a rather homogeneous adsorbent surface, while both the diffusion and chemical reactions were effecting on the rate of the adsorption.
Indium extraction from the other mining processes side-streams, especially zinc mines is the most conventional method to produce indium, however the latter process has its drawbacks in terms of reagents loss, economical feasibility as well as the Eco-friendliness of the extraction is questioned.
This study was established to present an eco-friendly process to capture the indium ions from indium chloride solution via a biodegradable adsorbent. The primary objective of this study is to synthesize a bio-based adsorbent from biobased material (Chitosan) and eco-friendly functionalization of Iminodiacetic Acid (IDA), thus all of the chemicals and reagents used are of a green chemistry base.
In this work IDA functionalized chitosan adsorbent was successfully synthesized, and investigated over indium chloride solution to assess the adsorption characteristics; the pH, contact time and metal concentrations. Indium uptake of IDA-chitosan was reported as 37.9 mg/g, at pH value of 3.5. The study also revealed that the indium capture by IDA-Chitosan was predicted by the Langmuir adsorption model indicating a rather homogeneous adsorbent surface, while both the diffusion and chemical reactions were effecting on the rate of the adsorption.