10 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.

The invention relates to the technical field of mercury recovery, and provides a full-automatic push plate type electric heating distillation furnace which comprises a furnace body, the furnace body is provided with a furnace shell, a hearth is arranged in the furnace shell, a heating element is arranged in the furnace shell, an inlet bin is arranged at the inlet end of the hearth of the furnace body, and an outlet bin is arranged at the outlet end of the hearth of the furnace body; an intake / exhaust system; the temperature control system comprises a voltage regulating module connected with the heating element; one end of the rotary through rail extends to the inlet bin, and the other end extends to the outlet bin; the push plate is used for bearing a material bowl filled with smelting waste; an automation unit; the rotary propelling system is used for driving the push plate and the material bowls borne by the push plate to sequentially complete the following circulation paths: after materials pass through the feeding bin and are conveyed to the automatic bowl loading machine from the feeder and are uniformly scraped, the materials enter the hearth from the inlet bin, move along the heating area in the hearth to complete distillation, move out of the hearth from the outlet bin and enter the rotary through rail; and moving along the rotary through rail to return to the inlet bin. The mercury pollution treatment automation level and the mercury recovery rate are improved.

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 slow-release oxygen fertilizer as well as a preparation method and application thereof, and belongs to the technical field of slow-release fertilizers. The slow-release oxygen fertilizer comprises a buffer layer, an oxygen source layer and a coating layer from inside to outside, and all the layers are isolated by filling layers. Wherein the buffer layer comprises a compound fertilizer composed of urea phosphate and a potash fertilizer; the oxygen source layer comprises a chemical oxygen producer calcium peroxide; the coating layer comprises polymer resin polyacrylate; the filling layer comprises a filling agent. The slow-release oxygen fertilizer developed by the invention has multiple functions of slow-release oxygen, acid-base buffering, nutrient supply and the like. The fertilizer is also suitable for being applied to acid-base sensitive crops, can promote the growth of various crops, and is not easy to cause soil hardening and salinization after being applied for a long time. In addition, when the slow-release oxygen fertilizer is applied to the mercury-polluted soil, the slow-release oxygen fertilizer has a remarkable inhibition effect on dissolution of mercury and formation of methyl mercury in the soil, and has important significance in promoting safe production of food crops.

The invention provides a full-automatic chemical oxygen demand analyzer and method based on mercury-free high-silver digestion, and relates to the technical field of water quality analysis and testing. The analyzer comprises a sample disc module, a multi-axis cooperation module, a liquid adding module, a digestion module, a detection module, a magneton putting module and a computer control and data processing module. The analyzer realizes automatic liquid adding, digestion and titration detection of a sample through a mercury-free high-silver catalytic closed digestion system and full-process automatic control, has the characteristics of environmental protection, high efficiency, energy conservation, high detection precision and simplicity and convenience in operation, remarkably reduces the mercury pollution risk, shortens the analysis period, and improves the stability and applicability of high-chlorine water sample detection.

The invention discloses indirect thermal desorption treatment equipment for mercury-containing polluted soil and solid waste. The indirect thermal desorption treatment equipment comprises an equipment box body, a preheating assembly and a thermal desorption assembly, wherein the preheating assembly and the thermal desorption assembly are sequentially arranged in the equipment box body; an exhaust pipe is arranged on the outer side wall of the equipment box body; the preheating assembly comprises a preheating cylinder, a first rotating shaft, a first auger and a first auger motor; a steam generator communicated with the interior of the preheating cylinder is arranged on the outer side wall of the equipment box body; the thermal desorption assembly comprises a heating cylinder, a heat preservation cylinder, a second rotating shaft, a second auger, a second auger motor and a combustion component; the mercury-containing polluted soil thermal desorption remediation device is reasonable in structural design, thermal desorption remediation is conducted on mercury-containing polluted soil in an indirect heating mode, the tail gas generation amount is small, the operation energy consumption of equipment can be reduced, and green and low-carbon effects are achieved; after the mercury-containing polluted soil is repaired by the equipment, the mercury can be recovered to the maximum extent, and the resource utilization of the mercury-containing polluted soil is realized.

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.