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Adsorption of metal ions from fine coal tailings dump waste water using bio-char
(EARET, 2018)
Coal mining operations produce large amounts of
tailings which contains heavy metals. Heavy metals such as
cadmium (Cd) can cause environmental problems. The adsorption
capacities of biochars produced from spent coffee ...
Hydrothermal preparation of biochar from spent coffee grounds, and its application for the removal of cadmium from coal tailings leachate
(SAIMM, 2019)
Spent coffee grounds were transformed into biochar using a hydrothermal method. Some of the biochar
product was pre-treated through surfactant impregnation with sodium dodecyl sulphate (SDS) to
enhance its adsorption ...