Carbon monoxide poisoning is one of the rare causes of hearing loss which may cause reversible or irreversible, unilateral or bilateral hearing loss after acute or chronic exposure. In this report, we present a case of bilateral sensorineural hearing loss in a secondary smelting workshop worker after an acute exposure to carbon monoxide. This complication was diagnosed by pure-tone audiometry a...

an emission factor is a tool that is used to estimate air pollutant emissions to the atmosphere. it relates the quantity of pollutants released from a source to some activities associated with those emissions. to determine the quantity of pollutant released from copper and its alloys smelting furnaces, 63 samples from emission gases were collected on cellulose ester membrane filters in three 8-...

Wasted printed circuit boards, PCBs, contain not only valuable metals such as Cu, Au, etc., but also smelting-repellent components Al, Br, and Sb. The latter should be removed before feeding them to the smelting process. In this study, we applied processes a pretreatment (i) heating screening remove devices on (ii) roasting remove/decompose Br Sb from (iii) two-stage selective grinding concentr...

The sedimentation rate (dated by 210Pb), sediment characteristics, pollution, and polymetallic (Cd, Pb, Zn, As, Hg) record were studied from two reservoirs (Maoshui Reservoir Lexi Reservoir), which are located in the zinc smelting area of Weining County, Guizhou Province, China. results showed that Maoshui reservoir is mainly polluted Cd, with average concentrations 53, 84, 2108 mg/kg, respecti...

Pollution controls were implemented to improve the air quality for the 2014 Youth Olympic Games (YOG) in Nanjing. To investigate the influence of pollution control on Pb inhalation bioaccessibility in PM2.5, samples were collected before, during, and after YOG. The objectives were to identify Pb sources in PM2.5 using stable isotope fingerprinting technique and compare Pb inhalation bioaccessib...