A process using a thermal reduction for producing the battery grade lithium hydroxide from wasted black powder generated by cathode active materials manufacturing.

Recent lithium consumption is doubled in a decade due to the Li-ion battery (LIB) demand for electric vehicles, the energy storage system, etc. The LIBs market capacity is expected to be in strong demand due to the political drive by many nations. Wasted black powders (WBP) are generated from the manufacturing of the cathode active material and spent LIBs.

A study on pyro-hydrometallurgical process for selective recovery of Pb, Sn and Sb from lead dross.

This study is to propose a pyro-hydrometallurgical process for recovering Pb, Sn, and Sb from lead dross (LD), incorporating stages of roasting, leaching, and precipitation. The LD, containing 67.2% of Pb, 4.

Recovery of tungsten and cobalt from cemented tungsten carbide wastes using carbonate roasting and water leaching.

Tungsten and cobalt can be recovered from cemented tungsten carbide-Co (WC-Co) scraps using a novel process based on roasting of the scraps with NaCO and water leaching of the calcine containing NaWO. The process was evaluated at different conditions testing several parameters, including NaCO/WC molar ratio 1:1-2:1, roasting temperature in the range 400-900°C, roasting time at 1-3 , leaching temperature at ambient - 90°C and leaching time 1-3 . Thermodynamic modeling of the roasting and leaching stages using HSC and Stabcal software allowed an understanding of the speciation of the products at different conditions.

Processing of ferromanganese fumes into high-purity manganese sulphate monohydrate.

A novel process for recovering manganese (Mn) values from two types of ferromanganese (FeMn) fumes (wastes from smelters) was developed incorporating several stages of leaching, roasting, and precipitation. Fumes containing high K (as KO) were first leached in water at ambient conditions to recover K, purified to remove metal impurities, and precipitated as 99.9% pure KSO.

An aggravated return-to-work case of organic solvent induced chronic toxic encephalopathy.

Background: Organic solvent-induced chronic toxic encephalopathy (CTE) is known as a non-progressive disorder that does not progress after diagnosis. The authors present a case those symptoms worsened after continued exposure to organic solvent after returning to work. Because such a case has not been reported in South Korea to the best of our knowledge, we intend to report this case along with literature review.

Review of carcinogenicity of hexavalent chrome and proposal of revising approval standards for an occupational cancers in Korea.

Background: The objective of this study is to suggest revised recognition standards for occupational disease due to chromium (VI) by reflecting recent domestic and international research works and considering domestic exposure status with respect to target organs, exposure period, and cumulative exposure dose in relation to the chromium (VI)-induced occupational disease compensation.

Methods: In this study, the reports published by major international institutions such as World Health Organization (WHO) International Agency for Research on Cancer (IARC) (2012), Occupational Safety and Health Administration (OSHA) (2006), National Institute for Occupational Safety and Health (NIOSH) (2013), American Conference of Governmental Industrial Hygienists (ACGIH) (2004), National Toxicology Program (NTP) (2014), and Agency for Toxic Substances and Disease Registry (ASTDR) (2012) were reviewed and the recent research works searched by PubMed were summarized.

Results: Considering the recent research works and the domestic situation, only lung cancer is conserved in the legislative bill in relation to chromium (VI), and the exposure period is not included in the bill.