Recovery of Useful Metal from Pit Wastewater Treatment Process of Abandaned Mine and Reduction of Final Disposal

Abstract

Re c o v e r yo fUs e f u lMe t a lf r o m P i tWa s t e wa t e rT r e a t me n tP r o c e s s o fAb a n d a n e dMi n ea n dRe d u c t i o no fF i n a lDi s p o s a l Hi d e y u k iMONGI １) ,C h i a k iK OS A K A ２) ,S e i j iMA T S UMOT O ３) a n dY o s i h i k oHOS OI ４) １) E n v i r o n me n t a lC h e mi s t r yOf f i c eT o t t o r iP r e f .I n s t .o fP u b l i cHe a l t ha n dE n v i r o n me n t a lS c i e n c e (５ ２ ６-１ Mi n a mi d a n i ,Y u r i h a ma ,T o u h a k u ,T o t t o r i ６ ８ ２-０ ７ ０ ４) ２) Ke ywo r d s :a b a n d o n e dmi n e , s e l e c t i v er e c o v e r yo f C ua n dF e , h e a v yme t a l s , s u l f i d i z i n g , o x i d a t i o n

Using data-driven analysis of geochemical environmental information to infer the environmental impact of closed mines

“…In Japan, a drainage water from mines is acidic and contains heavy metals. Even after the mine is closed, the flow rate of heavy metals is regarded as a problem caused by the pit waste water, sludge and slag ( Ishiyama et al., 2008 ; Mongi et al., 2007a , Mongi et al., 2007b ). Also, the environmental impact of mineral wastewater has become a significant problem worldwide ( Neiav et al., 2016 ).…”

“…Consequently, the long-term maintenance of closed mines that are no longer viable is an international problem. There are approximately 5000 closed mines in Japan Mongi et al., 2007a , Mongi et al., 2007b ). At present, mine wastewater from 80 closed metal mines is properly treated ( Sawayama and Tsuchiya, 2018 ; Tomiyama et al., 2010 ).…”

Study on Adsorption of Heavy Metals by Rice Husk and Extraction of Heavy Metals Adsorbed in Rice Husk

“…In recent years, the development of "urban mine" in which metals are taken out from the waste is promoted as a resource recycling because the metal demand has increased in IC chips and parts for electric vehicles. In addition, there is an effort to reduce the neutralized sludge by the extraction and recovery of heavy metals from the sludge as shown in [7]. However, the cost of chemicals is high because heavy metals are extracted and recovered by multistage treatment using various chemicals.…”