Wastewater from petroleum refining may contain a number of undesirable contaminants including sulfides, phenolic compounds, and ammonia. The concentrations of these compounds must be reduced to acceptable levels before discharge. Sulfur formation and the effect of selected phenolic compounds on the sulfide oxidation were studied in autotrophic aerobic cultures. A recirculation reactor system wa...

The Devonian massive sulfide orebodies of the West Shasta district in northern California are composed primarily of pyrite, with lesser amounts of other sulfide and gangue minerals. Examination of polished thin sections of more than 100 samples from the Mammoth, Shasta King, Early Bird, Balaklala, Keystone, and Iron Mountain mines suggests that mineralization may be divided into six paragenetic...

Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, particles are concentrated froth, and associated gangue minerals separated as tailings. However, significant amount of lost into tailings during the processing; therefore, can be considered secondary resources or future deposits copper. Particle–bubble collision efficiency particle–bubble aggreg...

Processes for recycling lithium ion batteries (LIB), in particular complex chemistries such as those containing nickel-manganese-cobalt oxide (NMC) cathodes are hindered by tradeoffs between capital cost, process sustainability, and materials recovery. Most metal separations primary secondary production of critical elements rely on anion exchange chemistries. Herein, we explore the application ...

The processing capacity of a gold concentrator in Shandong mine is 10000 t/d, and the production process one-stage grinding + one roughing, two sweeping finishing adopted. fineness 50%-55% -200 mesh content, flotation concentration 40%-45%, dosage butyl xanthate used as collector 120 (g/t). amount QX-3 foaming agent 40 (g/t), field recovery rate 93.74%. Because mixing tailings backfill into raw...

In the environment, two main sources of heavy metals are natural backgrounds derived from parent rocks and anthropogenic contamination including mineral industrial wastes, tailing damps of sulfide mines, agrochemicals, and other outputs of industrial activities and factories. In this work, the physico-chemical aspects of the magnetic Nano- mineral surfaces are studied in contrast to acid mine d...