6 results about "Mercury pollution" patented technology

The invention discloses a metal sulfide loaded biochar demercuration adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out mechanochemical grinding on a biomass raw material and metal sulfate through a high-energy ball mill to obtain a uniform precursor; and then performing one-step pyrolysis in an inert atmosphere, synchronously carbonizing the biomass and reducing the metal sulfate into metal sulfide, and finally preparing the metal sulfide nanoparticle and charcoal matrix strong coupling composite material. The method is simple in process, green and efficient, and avoids the defects of a traditional liquid phase method. The prepared adsorbent is high in active component dispersity, is firmly combined with a carrier, shows high adsorption capacity, high removal efficiency and good anti-interference stability for elemental mercury in flue gas, and has a wide application prospect in the field of mercury pollution control of coal-fired flue gas.

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 provides a water-gas mercury coupling online monitoring device and method. The water-gas mercury coupling online monitoring device comprises a water body mercury automatic online sampling unit, a gas mercury automatic online sampling unit and a mercury detector, the water body mercury automatic online sampling unit comprises a filtering membrane, a first drying pipe, a stop valve, a first mass flow controller and a first mercury enrichment pipe which are sequentially connected through a pipeline; the gas mercury automatic on-line sample injection unit comprises a peristaltic pump, a precipitation bottle, a metering pump, a water quality mercury thermal desorption pipe, a second drying pipe and a second mercury enrichment pipe which are sequentially connected through a pipeline; the mercury detector is connected to the first mercury enrichment pipe and the second mercury enrichment pipe; and an inlet of the first mercury enrichment pipe and an inlet of the water quality mercury thermal desorption pipe are connected with a carrier gas source. The invention innovatively develops the water-gas mercury coupling on-line monitoring device and method, and provides a scientific technical method and support for collaborative monitoring and evaluation of environmental water quality, gas mercury concentration and pollution conditions, accurate measurement of exchange flux of mercury on a water-gas interface and treatment of mercury pollution.

The utility model relates to the technical field of environmental science and soil pollution analysis, and discloses a form analysis device for mercury in mercury-containing polluted soil, which comprises a rack, a sample treatment mechanism, a mercury form extraction module and a detection module, the sample treatment mechanism comprises a feed port, a heating cavity and a discharge port, the feed port is communicated with the heating cavity through a feed channel, and the discharge port is communicated with the heating cavity through a discharge channel. A grinding roller is arranged in the feeding channel, a screening net is arranged between the feeding channel and the heating cavity, and a heating wire set is arranged in the heating cavity. Samples are processed through the sample processing mechanism, so that uniform and stable soil samples can be obtained, and the accuracy of mercury form analysis is improved; mercury in an acid exchange state, an iron-manganese oxidation state, an organic-sulfuration state and a residue state in the soil can be obtained through the mercury form extraction module, so that different forms of mercury in the soil can be comprehensively analyzed; and through a detection technology in the detection module, the content of mercury in various forms can be detected.

This invention provides a highly selective and sensitive fluorescent probe for mercury ions, its preparation method, and its applications, belonging to the fields of chemical sensing materials and environmental monitoring technology. This invention connects 4-(1,2,2-triphenylvinyl)phenol, which exhibits aggregation-induced emission, and a guanosine derivative with multiple coordination sites, via a flexible chain to obtain a fluorescent probe with the structure shown in Formula I. This fluorescent probe not only overcomes the problems of large differences in solubility and reactivity between 4-(1,2,2-triphenylvinyl)phenol and guanosine derivatives, making coupling difficult, but also possesses high sensitivity and selectivity; its detection limit reaches 12.24 nM, effectively detecting trace mercury pollution in samples. It can also accurately identify mercury ions in water samples containing multiple high concentrations of metal ions, demonstrating high accuracy in real water samples. It is suitable for the accurate determination of mercury ions in complex environmental water samples and has good practical application value in the field of environmental monitoring. Formula I

The invention discloses a tail gas treatment system for indirect thermal desorption treatment of mercury-containing polluted soil. The tail gas treatment system comprises a dust removal unit, a condensation unit, a first adsorption unit, a three-stage washing unit and a second adsorption unit which are connected in sequence, a mercury liquid separation unit is connected with the condensation unit; the dust removal unit comprises a cyclone dust collector; the cyclone dust collector is connected with a pulse bag type dust collector; the condensation unit comprises a first tubular heat exchanger, a first gas-liquid separator, a second tubular heat exchanger and a second gas-liquid separator which are sequentially connected in series, and the second gas-liquid separator is connected with a plurality of third tubular heat exchangers which are arranged in parallel in series; the system can realize graded precise mercury removal, multi-unit synergistic high efficiency, resource recovery and environmental protection, can maximally remove pollutants in mercury-containing tail gas, and realizes mercury resource recovery and secondary pollution control.