Method for preparing jarosite through microbial conversion

Abstract

The invention relates to a method for preparing jarosite through microbial conversion. The method comprises the following steps: (1) preparing a 9K culture medium; (2) preparing a microbial conversion culture medium; (3) preparing a soft agarose culture medium; (4) performing culture preservation, namely mixing leptospirillum ferriphilum BYQ bacteria liquid in a stable phase preserved at the temperature of 0 DEG C with the soft agarose culture medium, solidifying at room temperature, and preserving at the temperature of 2-4 DEG C; (5) activating the strain, namely inoculating the leptospirillum ferriphilum BYQ strain into a shake flask containing the 9K culture medium and performing shaking culture, thus obtaining a strain activation solution; (6) performing biological conversion, namely inoculating the strain activation solution to a shake flask containing the microbial conversion culture medium and performing shaking culture, and standing at room temperature, thus obtaining jarosite which is attached to the wall of the shake flask and is generated through biological conversion; (7) soaking and centrifuging the shake flask to which the jarosite is attached by using a hydrochloric acid solution, thus obtaining a precipitate; and (8) performing vacuum drying on the precipitate to constant weight, and grinding to obtain the jarosite. The method is rapid, simple, convenient and environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing jarosite, in particular to a method for preparing jarosite through microbial conversion. Background technique [0002] Jarosite [KFe 3 (SO 4 ) 2 (0H) 6 ] is a natural mineral originating in Jaroso Canyon in Spain. It has strong hiding power, non-toxic and acid-resistant properties. It is a high-performance, rare and expensive yellow inorganic pigment. At the same time, jarosite is also widely used to remove iron in the smelting of zinc, nickel, cobalt and other metal industries. Since jarosite minerals are neither soluble in dilute acid, but also easy to precipitate, wash and filter, under certain temperature, acidity and the presence of ammonium or alkali metal ions, the Fe in the solution can be 3+ The ions form jarosite minerals and precipitate, so that the Fe ions present in the leaching solution are removed. This characteristic of jarosite makes it have important application prospects in the fi...

AI Technical Summary

Problems solved by technology

[0003] However, jarosite crystals are rare and often accompanied by other impurities

Many studies on the synthesis of jarosite by chemical methods require high temperature and high pressure, complex process conditions, or need to react for several months at normal temperature and pressure, and contain colloidal red amorphous hydroxysulfate ferric impurities, so they are all subject to application. extremely restrictive