Functionalized agriculture-derived biomass-based adsorbent for the continuous recovery of gold from a simulated mobile phone leachate

Intan Nurul Rizki; Ilma Amalina; Nurul Sahida Hasan; Nur Farahain Khusnun; Aishah Abdul Jalil; Mochamad Lutfi Firmansyah

doi:10.1016/j.chemosphere.2023.140455

Functionalized agriculture-derived biomass-based adsorbent for the continuous recovery of gold from a simulated mobile phone leachate

Chemosphere. 2023 Dec:345:140455. doi: 10.1016/j.chemosphere.2023.140455. Epub 2023 Oct 17.

Authors

Intan Nurul Rizki¹, Ilma Amalina², Nurul Sahida Hasan³, Nur Farahain Khusnun³, Aishah Abdul Jalil⁴, Mochamad Lutfi Firmansyah⁵

Affiliations

¹ Nanotechnology Engineering, Faculty of Advanced Technology and Multidisciplinary, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia; Department of Mining Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology Bandung 40132, Indonesia.
² Nanotechnology Engineering, Faculty of Advanced Technology and Multidisciplinary, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia.
³ Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
⁴ Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM Johor Bahru, Johor, Malaysia.
⁵ Nanotechnology Engineering, Faculty of Advanced Technology and Multidisciplinary, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia. Electronic address: ml.firmansyah@ftmm.unair.ac.id.

PMID: 37858767
DOI: 10.1016/j.chemosphere.2023.140455

Abstract

Electronic waste has become a global concern, as it has been steadily increasing over the years. The lack of regulation and appropriate processing facilities has rendered these wastes an environmental hazard. However, they represent excellent alternative sources of precious metals, which are highly in demand in various industries. Adsorption has been a popular method for metal removal/recovery because of several advantages, such as ease of use and low cost. In this regard, it is crucial to develop an inexpensive and functionalized adsorbent to selectively adsorb precious metals. Thus, silica, which is derived from rice husk and is abundantly present in Indonesia, was functionalized using an ionic liquid (SiRH_Im) and used for Au(III) adsorption from a simulated mobile phone leach liquor. SiRH_Im exhibited a high adsorption capacity (232.5 mg g^-1). The Au(III) adsorption kinetic suitably fitted with the pseudo-second-order kinetic model. The Au(III) adsorption followed a chemisorption route that suited the monolayer model. Thomas' and Yoon-Nelson's models were well suited for the continuous Au(III) behavior. Selective recovery of Au(III) from SiRH_Im was achieved via sequential desorption. SiRH_Im also showed excellent reusability, as indicated by a negligible decrease in adsorptive performance over three cycles. The functionalization of silica derived from rice husk using an ionic liquid led to the successful creation of a solid adsorbent with a high adsorption capacity toward precious metals present in a simulated leach solution. Our results highlight the benefit of the functionalization of biomass through the immobilization of an ionic liquid toward the enhancement of its adsorption capability.

Keywords: Adsorption; Biomass; Gold; Ionic liquid; Silica; Waste recycling.

MeSH terms

Agriculture
Biomass
Cell Phone*
Gold
Ionic Liquids*
Silicon Dioxide

Substances

Gold
Ionic Liquids
Silicon Dioxide