Extracellular polymeric substances (EPS) produced by microorganisms are a complex mixture of biopolymers primarily consisting of polysaccharides, as well as proteins, nucleic acids, lipids and humic substances. EPS make up the intercellular space of microbial aggregates and form the structure and architecture of the biofilm matrix. The key functions of EPS comprise the mediation of the initial ...

This review describes the historical development and current state of metals leaching and sulfide mineral biooxidation by the minerals industries. During the past 20 years commercial processes employing microorganisms for mineral recovery have progressed from rather uncontrolled copper dump leaching to mineral oxidation and leaching in designed bioheaps for oxidation of refractory gold ores and...

There are many similarities between Acidthiobacillus ferrooxidans (At.f) and magnetotactic bacteria on physiological properties and growing environment except their trophic types. Magnetosomes can be extracted from At.f by using an improved extracting method of magnetosomes. The membrane of At.f was crushed by ultrasonic wave and the magnetosomes in At.f which mainly contains Fe through chemica...

The need to drive towards sustainable metal resource recovery from end-of-cycle products cannot be overstated. This review attempts investigate progress in the development of recycling strategies for strategic metals, such as precious metals and base catalytic converters, e-waste, batteries. Several methods resources have been explored these waste streams, pyrometallurgy, hydrometallurgy, biohy...

Biohydrometallurgy has been defined as a collection of techniques that involve the use microbial metabolisms, such bacterium Acidithiobacillus thiooxidans, for extraction metals. Therefore, in current study, we tested potential pure culture A. Thiooxidans removal zinc and iron from galvanized waste automotive industry. Starkey medium was employed added 0.5% w/v solid sample, incubation took pla...