2results about How to "Reduce mercury levels" patented technology

This invention discloses a method and microbial preparation for controlling mercury accumulation in rice grains using Metarhizium anisopliae colonization, belonging to the field of agricultural environment and microbiology technology. The method involves inoculating rice plants with Metarhizium anisopliae spores, followed by planting the rice in mercury-contaminated paddy fields; water management is implemented throughout the rice's growth cycle until harvest. This invention establishes a complete microbial remediation system for mercury contamination in paddy fields, providing not only a method for the colonization and application of Metarhizium anisopliae in mercury-contaminated environments, but also ensuring safe rice production, offering a feasible approach to safeguarding food security and human health.

The invention belongs to the technical field of gold smelting, and provides a method for reducing the mercury content in a gold smelting pregnant solution. The method comprises the following steps: firstly, measuring the mercury content in a gold smelting pregnant solution to be treated, then sequentially adding sodium diethyldithiocarbamate and a composite sulfur slow-release agent into the pregnant solution, and reacting for 2-4 hours under the conditions that the reaction temperature is controlled to be 25-35 DEG C and the stirring speed is 150-250 revolutions per minute; the composite sulfur slow-release agent is prepared from calcium sulphoaluminate, modified silica gel and a carbon nano-tube; and finally filtering and separating the pregnant solution. A novel composite sulfur slow-release agent is adopted, the slow-release agent can intelligently regulate and control the release rate of sulfur ions according to the ion concentration environment in the pregnant solution, meanwhile, a specific ion selectivity accelerant is added, the sulfur ions are accurately guided to be preferentially combined with mercury for precipitation, and therefore the mercury content is efficiently reduced on the basis that the extraction rate of gold and silver in the pregnant solution is not affected.