6 results about "Mercury contamination" patented technology

The present application relates to mercury pollution treatment technical field, especially laboratory mercury pollution automatic processing method, the method includes the following steps: step S1: the mercury waste gas is from the air inlet pipe into the pretreatment pool, so that the mercury waste gas is contacted with the absorption liquid to absorb the mercury waste gas; Step S2: when the absorption liquid changes color, the first color sensor sends a signal to the control host, the control host controls the multiple electric telescopic rod to drive the shielding block to move, so that the air outlet pipe is opened, the control host controls the first valve to open, so that the absorption liquid is contacted with the filter material through the liquid outlet pipe into the filter tank to reduce mercury ions to metallic mercury; The present application can accurately and efficiently treat mercury vapor, mercury waste liquid and find mercury leakage in time, so as to guarantee the personal safety of the experimenter.

The application provides a mercury-contaminated soil treatment process and a mercury-contaminated soil treatment system. The mercury-contaminated soil treatment process comprises: treating the mercury-contaminated soil by using a thermal desorption heating process, so that mercury in the mercury-contaminated soil is thermally desorbed from the mercury-contaminated soil in a gaseous form and forms mercury vapor; cooling the mercury vapor, so that at least part of the mercury in the mercury vapor is converted from the gaseous form to a liquid form and forms liquid mercury; performing a sedimentation process on the liquid mercury, in which the liquid mercury is combined with suspended material to form a mercury suspension and is suspended in an upper layer of the liquid, and the mercury in the mercury suspension is recovered and treated. The technical scheme provided by the application can solve the technical problem of poor mercury removal effect of the mercury-contaminated soil treatment process in the prior art.

The invention discloses safe, environment-friendly and stable-performance liquid gold ink and a preparation method thereof. According to the gold ink, high-purity gold foil or gold powder serves as a main color developing material, oxhide gelatin serves as an adhesive, and iron oxide red and mica powder are innovatively compounded to replace toxic cinnabar to serve as a color adjusting agent, so that the mercury pollution risk is fundamentally eliminated; meanwhile, bletilla striata gum and tung oil form a suspension system, and an MCC / HPMC compounding agent is introduced to form a three-dimensional network structure, so that the problem of gold powder sedimentation is effectively solved, long-term stability of the ink is ensured, and the ink is ready to use after being taken. In addition, a borneol and clove plant compound preservative system is adopted, so that the cost is reduced while the natural properties are kept. The preparation process is standardized through step-by-step feeding, mechanical stirring and low-temperature curing, the product consistency and the production efficiency are remarkably improved, and the production period is shortened to be within 10 days.

The invention relates to the technical field of environmental protection, and discloses a method for restoring mercury-polluted soil by using oilseed rape and nano sulfur while producing. Compared with a traditional remediation method, the method has the advantages that the nano-particles of the nutrient element sulfur necessary for plants are introduced, rape crops with high stress resistance and wide adaptability are selected for matching, and the simple and efficient method for remediation while production of the rape-nano-sulfur for soil mercury pollution, which is easy to popularize in a large area, is created. The nanometer sulfur particles with a certain concentration are applied to the mercury-polluted soil, so that the accumulation of mercury on the overground part of the rape can be obviously reduced. The remediation method can be applied to the technical field of environmental protection, is particularly applied to plant remediation of light and medium mercury contaminated soil in the middle and lower reaches of the Yangtze River, and is easy and convenient to operate and wide in application range.

The invention relates to a method for synthesizing mercuric sulfide by an all-wet method, which adopts industrial crude mercury and a sodium sulfide purified solution as raw materials, takes a solution phase controllable reaction as a core, breaks through the bottlenecks in raw material limitation, reaction conditions, product regulation and environmental protection in the prior art, and aims to solve the problems that the prior art depends on a high-temperature or high-pressure environment, the reaction process is uncontrollable and the like. And through precise regulation and control of solution phase parameters, mild reaction conditions and controllable process are realized, and the method is suitable for application scenes such as electronics and medicines. Crystal form orientation is realized through dual control of crystallization rate and additives, beta-HgS is generated through rapid crystallization, and alpha-HgS is generated through slow crystallization; the problem of mercury pollution or other toxic gas pollution in actual operation is solved, a traditional method for synthesizing mercuric sulfide from mercury and sulfur or hydrogen sulfide is replaced, and a low-pollution and low-energy-consumption synthesis method is formed.

The application discloses a kind of photocatalytic oxidation and mercury removal agent combined oil and gas field mercury-containing sewage treatment system and method, belong to oil and gas engineering technical field.The pipe type ultraviolet photooxidation reactor includes the TiO2 catalyst loaded on the inner surface of reaction tube, mercury-containing sewage is pumped into the inside of pipe reactor with pump air from water inlet, and the oxygen in air is oxidized under the action of TiO2 catalyst on the inner wall of reactor, and the organic mercury and low-valence inorganic mercury in sewage are Hg (II) ;Subsequently, mercury-containing wastewater after oxidation treatment enters the mixing reactor, and reacts by adding mercury removal agent, to realize the standard removal of mercury pollution in wastewater, with the advantages of simple operation, good removal effect, environmental protection and the like.