Country Case Study on Artisanal and Small scale Mining: Philippines 3 Introduction A general assessment of the Philippine small scale mining sector according to issued terms of reference was undertaken during the July 2001 on behalf of Mines, Minerals and Sustainable Development . This report covers the various findings and
Philippines, the usual process employed by small scale gold min ers to recover gold is amalgamation during ball milling followed by the recovery of mercurygold amalgams by gravity concen tration techniques like panning and sluice boxes. Because the processed ores after ball milling still contain considerable
Small scale gold miners in Paracale, Camarines Norte use amalgamation process to recover gold from mined ores. In the process, they dispose untreated wastewater to water bodies. In this study, wastewater from an active SSGM ball mill facility in the area was analyzed for physico chemical parameters and heavy metal concentrations.
on the use of amalgamation of gold ore with Hg in ball mills in the Philippines was in mid 1980s at Diwalwal in Mindanao . In 1991, the enactment of the Peoples Small Scale Mining Act repealed/revoked PD 1988. The law was an effort to create more work opportunities and provide sustenance to small
Table 12. Financial information from small scale miners also doing amalgamation processing in Panique, Aroroy, Masbate and Tugos, Paracale, Camarines Norte, 1999 Table 13. Environmental information from small scale ball mill operators in Panique, Aroroy, Masbate and Tugos, Paracale, Camarines Norte, 1999 Table 14.
The results showed that mercury use is still prevalent among small scale gold miners in the Philippines. Tailings after ball mill gravity concentration from Mt Diwata and Libona contained high levels of mercury amounting to 25.024 and 6.5 mg kg 1, respectively. The most prevalent form of mercury in the mine tailings was elemental/amalgamated mercury, followed by water soluble, exchangeable, organic and strongly bound phases, respectively.