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The leach liquor of a low grade silver ore containing 0.5% Ag is used to produce two varieties of metallic silver following two routes. Route-I leading to silver mould by precipitating out silver chloride with 1.62g/L NaCl and later on roasting the silver chloride with Na2CO3 in 2:1 ratio at 1000°C for 2h. Route-II leading to silver nano metals by treating the leach liquor with 5% (v/v) hydrazine hydrate as reductant and 10mL of 0.01M sodium lauryl sulfate in 100mL of leach liquor as surfactant. The paper first time reports the production of silver nano metal from impure leach liquor. This is a new dimension to the conventional nano metal preparation. Silver is obtained in nature in its native form. Apart from coin making (ancient eras) and jeweler making, silver has its uses in various fields like electrical, thermal and pharmaceuticals due to its high electrical and thermal conductance’s and for its proficient antibacterial activity respectively. Extraction of silver deals with the leaching with different reagents like ferricyanide,1-3 cyanide,4-5 thiosulfate,6-8 thiourea,9-11 ferric ion,12 sulfate,13 nitric acid14-15 and chloride/hypochlorite.16 Ultrasound assisted leachings17-18 are also one of the recent trends. Silver is extracted from the leach liquor through electrochemical deposition, 19 electroseparation20 and precipitation.21 Synthesis of silver nano metal is one of the most upto-date investigations in today’s world due to its high applicability. Nano metals show amazing properties due to high surface to volume ratio. Nano clusters provide a potential platform to study atoms as well as bulk and looking towards both the sides being in the middle.22 Nano metallic particles have many such unique properties as compared to the bulk. Investigations so far have reported the preparation of silver nano particle synthetically from silver nitrate,23-26 silver diamine27-28 and silver thiosulfate.23 One thing to be noted here that all those silver nano particles are produced from high grade pure salts. This paper first time reports the preparation of metallic silver from a leach liquor of low grade silver ore containing 0.5% silver which would never be used for industrial silver production. Nano metal synthesis from a pure salt is in ease due to its purity and assurance of the absence of other ions. But synthesizing pure metal nano particles from a solution having varieties of ions is a challenging task. The advantages of producing silver nano metal from impure leach liquor are 1) it may suggest another method of metal extraction from the leach liquor apart from the conventional ones, 2) it would give a process to produce nano silver from leach liquor of various kind of silver ores and the secondary silver materials and 3) it will substitute the electrode position and electro separation thereby reducing the electrical energy. Moreover this paper also reports the production of metallic silver mould from route-I via precipitation of silver chloride followed by roasting and metallic silver nano powder via reduction method. (Chemical bonds between primary particles) state, since their

Metallic Silver from Leach Liquor: A New Approach for Silver Nano Metal Synthesis