Open AccessLithium and Calcium recovery by activated carbon from coconut shell char
Author(s) -
Chandra Wahyu Purnomo,
A. Widyadhana
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/823/1/012032
Subject(s) - activated carbon , adsorption , char , leaching (pedology) , chemistry , inorganic chemistry , metal , metal ions in aqueous solution , lithium (medication) , activated charcoal , carbon fibers , chemical engineering , materials science , organic chemistry , coal , composite material , composite number , medicine , environmental science , engineering , soil science , soil water , endocrinology
Spent rechargeable batteries and electronic waste become a future challenge. The precious metal inside should be recovered for pursuing a circular economy society. Here, lithium phosphate battery has been dismantled and leached the cathodes by acidic solution to produce metal solutions. The metal content will be separated by a simple adsorption mechanism using activated charcoal. Coconut shell char has been activated by KOH in several temperature settings and then tested to adsorb lithium and calcium ions in the leaching solution. The capacity of adsorption and selectivity between the ions were investigated. The adsorption capacity is strongly related to the activation temperature and KOH/char ratio. Higher activation temperature and agent ratio tend to provide better-activated carbon for metal ion adsorption. It is found that Li ions have lower affinity toward the surface of carbon especially in low concentration than Ca ions.