Heavy metals removal from acid mine drainage water using biogenic hydrogen sulphide and effluent from anaerobic treatment: Effect of pH

Health hazards of child labor in the leather products and surgical instrument manufacturing industries of Sialkot, Pakistan

“…Pb also poses serious health risks to child labor in the leather industries, and these findings are in accordance with previous studies, which highlighted the health risks associated with Pb in the office dust from Istanbul, Turkey (Kurt-Karakus, 2012) and mining area dust from Jiangsu, China (Qu et al, 2012). Pb has a higher gastrointestinal accumulation in children (40e50%) (Jomova and Valko, 2011) and blood is the primary target of Pb toxicity in humans and severe scenarios can cause hypertension, cognitive impairment and neurological disorders (Jim enez- Rodríguez et al, 2009). In addition, Ni had the highest HI values in the surgical industries, which can be a major threat to the exposed children because excessive exposure to Ni may cause asthma, chronic bronchitis and the defects of lungs and nasal cavity (Health et al, 1997).…”

“…Previous reports have highlighted the worse working conditions in these industries, albeit only a few scientific studies are available those focused on occupational health assessment associated with the heavy metals exposure in the workers (Junaid et al, 2016a;Khan et al, 2013) and rarely in the child labor (Sughis et al, 2014). Generally, prolonged occupational exposure to heavy metals can induce different health hazards such as asthma, hypotension, gastrointestinal diseases, renal and hepatic failure and even cancer, and children are more prone to such health impacts (ATSDR, 2000;Jim enez-Rodríguez et al, 2009;Jomova and Valko, 2011). Previously, heavy metals e.g.…”

A multilevel sustainability analysis of zinc recovery from wastes

“…These metals are high in market values and it is beneficial to recover these metals and reuse them to achieve highest resource utilisation. The concentrations of zinc (in mg/L) in various types of wastewater are: municipal treatment plant (0.26-0.75); road wash water (0.105-1.56); tannery (0.684); mining (0.023); battery factory (0.6-17.0); copper smelting (455.6); acid mine drainage (120); electroplating industry (584); metal finishing industry (3.50-9.56); hazardous waste landfill leachate (1.15); industrially-contaminated groundwater (0.51), respectively (Wang and Ren, 2014;de la Varga et al, 2013;Lipczynska-Kochany and Kochany, 2009;Paruch and Roseth, 2008;Tariq et al, 2005;Chakraborty and Chakrabarti, 2006;Santos Yabe and de Oliveira, 2003;Basha et al, 2011;Jiménez-Rodríguez et al, 2009;Boricha and Murthy, 2009;Gabaldón et al, 2007;Pavelka et al, 1993;Adey et al, 1996). …”

Waste Water Treatment in Chemical Industries: The Concept and Current Technologies

“…Anaerobic pre-treatment offers several potential advantages such as better removal of colour, absorbable organic halogens (AOX), and Heavy metals. Improved heavy metal removal may follow sulphide production [32], while the improvement of the colour and AOX removal from the rapid reduction and cleavage under anaerobic conditions of the azo groups in arylazo pollutants and of electron-withdrawing chloro or nitro substituent's [33].…”