Recycling different types of ashes for cement production has gained increasing attentions
worldwide in a bid to close the waste loop. It minimizes waste landfilling and meanwhile …

Humic substances readily identifiable in the environment are involved in several biotic and
abiotic reactions affecting carbon turnover, soil fertility, plant nutrition and stimulation …

A bioleaching process to extract rare-earth elements (REE) from fluidized catalytic cracking
(FCC) catalysts was optimized using a heterotrophic bacterium Gluconobacter oxydans to …

Red mud (RM) is a typical mass quantity of solid waste generated from industrial alumina
production and usually consists of valuable metals such as Al and rare earths (REs). This …

Given increasing demand and importance of rare earth elements (REE), exploration is
underway to find alternatives to ore-extracted product. With REE concentrations varying …

With the advancement of technology and a global shift towards clean energy, the need for
rare earth metals is increasing. Scandium, a rare earth metal, has been extensively used …

Humic substances (HS) are originated from naturally decaying biomass. The main products
of HS are humic acids, fulvic acids, and humins. HS are extracted from natural origins (eg …

Abstract CSIR-National Metallurgical Laboratory (CSIR-NML), India dealing with coal
characterization, has recently made sincere efforts to develop a process to recover REMs …

Humic acids (HAs), kinds of valuable active carbon, are critical for improving soil fertility.
However, the majority of soils are poor in HAs, arousing the development of artificial HAs. In …

The future of opencast mining and energy production based on conventional resources is
one of the most important issues being discussed in international forums. The whole …