Bahaya keracunan mercury akan diatasi. Teknik yang akan diterapkan : 1. Extraksi emas dengan cyanide, dengan efficiency 90%, sedangkn dengan mercury hanya 50%. Chemical reactions[edit <https://en.wikipedia.org/w/index.php?title=Gold_cyanidation&action=edit§ion=3> ]
The chemical reaction for the dissolution of gold, the "Elsner Equation", as follows: 4 Au + 8 NaCN + O2 + 2H2O → 4 Na[Au(CN)2] + 4 NaOH In this redox <https://en.wikipedia.org/wiki/Redox> process, oxygen removes, via a two-step reaction, one electron from each gold atom to form the complex Au( 2.Limbah cyanide dioxidsi, dibuang sebagai cyanat, yang daya toksisnya berkurang 1000 kali. Cyanat telah memenuhi baku mutu lingkungan karena akan pecah jadi bicarbonat dan ammoniak . The INCO-licensed process and the Caro's acid process oxidise the cyanide to cyanate <https://en.wikipedia.org/wiki/Cyanate>, which is not as toxic as the cyanide ion, and which can then react to form carbonates and ammonia:[*citation needed <https://en.wikipedia.org/wiki/Wikipedia:Citation_needed>*] CN− + [O] → OCN− OCN− + 2 H 2O → HCO− 3 + NH 3 https://www.pressreader.com/indonesia/kompas/20170610/282518658476897 http://www.beritasatu.com/sains/434719-bppt-dorong-pengolahan-emas-tanpa-merkuri.html Mungkin dikombinasi dengan teknik di bawah ? http://www.mongabay.co.id/2015/09/27/nambang-emas-pakai-ijuk-hasilkan-lebih-banyak-dan-bebas-merkuri-seperti-apa/
