11 results about "Heavy metal chelation" patented technology

The utility model relates to a kind of water body heavy metal pollution cyclic repair equipment, its structure is: three purification columns are positioned in the shell inner cavity circumference, heavy metal chelate particles are equipped in purification column;Water tank is connected at the lower end of shell, three water tanks of upper open are distributed in the circumference in water tank, the top of water tank corresponds with the position of purification column, the top of water tank is connected inlet pipe, extends water tank, pipe end portion has butterfly valve, the bottom of water tank is connected outlet pipe, extends water tank, pipe end portion has three-way valve;Positioning plate is connected at the upper end of shell, three water circulation pumps are peripherally arranged in positioning plate, the water inlet of water circulation pump upper end is communicated with the inner cavity of corresponding water tank by outlet pipe, the water outlet position of water circulation pump lower end corresponds with the upper end opening position of purification column. The repair equipment can repair heavy metal pollution water body by the purification column filled with adsorption material, and through water circulation system, improve water body repair efficiency, realize heavy metal recovery and the reuse of adsorption material.

This invention discloses a treatment process for high-concentration sulfate wastewater, belonging to the field of wastewater purification technology. The invention first provides a multifunctional composite ion sieve, the raw materials of which include magnetic core microspheres, calcium aluminate precursor components, heavy metal chelating agents, scale inhibitors, antioxidants, antibacterial agents, host-guest recognition agents, polysaccharide compounds, polyacrylic acid compounds, crosslinking agents, and initiators. The ion sieve is prepared through steps including magnetic core preparation, calcium aluminate precursor functional layer deposition, small molecule modification layer loading, and pH-responsive outer shell coating. In use, the ion sieve is added to wastewater and stirred for adsorption. After adsorption saturation, solid-liquid separation is achieved through magnetic separation, and the material is regenerated and recycled sequentially using desorption and reconstruction solutions.

The utility model discloses a wastewater heavy metal chelation precipitation reaction device concretely relates to wastewater treatment technical field, including the sedimentation tank and the silt discharge pipeline, the bottom of the right side of sedimentation tank installs the silt discharge pipeline, and the top inside of sedimentation tank is provided with pretreatment assembly. The utility model discloses be provided with pretreatment pipeline, and the wastewater enters the inside of pretreatment pipeline through sewage inlet pipe, and when staying in the inside of pretreatment pipeline, can add medicine through medicine inlet pipe and handle, after mixing, can start electric push rod, and the auxiliary ring cover slides along the pretreatment pipeline, and after the bottom groove of bottom side opens, can flow into the inside of sedimentation tank through the bottom groove and carry out the precipitation treatment, and the filter screen in the bottom groove can carry out the prefiltration treatment to sewage in this process, and handle the larger sundries in the sewage, realize the pretreatment function of the wastewater heavy metal chelation precipitation reaction device when using.

This invention provides a slope protection material composed of recycled heavy metal tailings and its preparation method. The material includes: recycled heavy metal tailings treated with a heavy metal chelating agent as a heavy metal ion capture agent, the chelating agent being added at 0.05%–0.2% of the heavy metal tailings weight; recycled heavy metal tailings as aggregate, which is mixed with natural soil to form a base material at a ratio of 1:1.5–2.5; fine aggregate and fine sand, added at 5%–10% of the base material weight; and high-viscosity industrial-grade sodium alginate added as a water-retaining and reinforcing agent, added at 0.5%–2.0% of the base material weight. Additionally, 28% organic matter is added to the base material. The application of this invention effectively solves the problems of ineffective utilization of recycled heavy metal tailings and excessive use of scarce natural soil in existing technologies, and also addresses the issues of weak strength, poor effectiveness in steep slope treatment, and poor stability in existing slope protection materials.

The application provides a deep water layer sewage treatment system and method for river sewage, which comprises a pretreatment interception module, an intelligent precise dosing module, a gradient reaction module, a solid-liquid separation-recovery module and an Internet of Things monitoring and control module; the composition of the medicament used in the intelligent precise dosing module comprises, in parts by weight, 40-85 parts of a conventional flocculant, 2-6 parts of an organic coagulant aid, 12-28 parts of a graphene-chitosan grafted beta-cyclodextrin composite adsorbent, 8-22 parts of a magnetic cerium-bismuth composite nano photocatalyst, 4-12 parts of a heavy metal chelating agent, 18-45 parts of a slow-release carrier, 6-18 parts of an oxidation synergist, 3-9 parts of a pH regulator, 7-15 parts of a biological synergist and 2-6 parts of a bactericide; the modules and components of the medicament in the application synergistically act to efficiently remove suspended particles, organic pollutants, ammonia nitrogen, total phosphorus and heavy metals such as Cr 6+ , Pb 2+ , Cd 2+ , etc. in the deep water layer of river sewage, and improve the precision, automation level and resource recovery rate of sewage treatment.

The utility model discloses a kind of storage devices for heavy metal chelating agent production, including storage tank, the upper surface of storage tank is rotatably installed with cover plate, the surface of cover plate is equipped with through slot, one side of the through slot is fixedly connected with fixed block, the one side of fixed block is fixedly connected with circular bar, the outer surface of circular bar is slidably sleeved with adjusting cylinder, the inside of adjusting cylinder is combined with jacking spring, the one end of jacking spring is jackedly connected with the end of circular bar, one end of adjusting cylinder is fixedly connected with support, the inside of support is equipped with square open slot, the side of square open slot is equipped with fixed hole, the inside of square open slot is inserted with locating rod, the outside surface of locating rod is fixedly attached with cleaning brush, the cleaning brush is slidably connected with the opening position of square open slot, and when using, it can be adjusted to be inserted to internal position, it is convenient and efficient, adaptability is high, beneficial to control use.

The technology described herein is directed to compositions and methods for treating CNS diseases or disorders associated with microbiome dysbiosis. In one aspect, described herein are compositions and methods for treating CNS diseases or disorders associated with a microbiome deficient in queuine biosynthesis. In another aspect, described herein are compositions and methods for treating CNS diseases or disorders associated with a microbiome deficient in endozepine biosynthesis. In another aspect, described herein are compositions and methods for treating CNS diseases or disorders associated with a microbiome deficient in heavy metal sequestration.

The application discloses a method for targeting heavy metal removal in a fly ash water washing process, and relates to the technical field of wastewater treatment; and specifically comprises the following process steps: fly ash samples are placed in deionized water, sodium dihydrogen phosphate is added for primary water washing treatment, and first-stage water washing fly ash and first-stage water washing filtrate are obtained through filtration; then the first-stage water washing fly ash is placed in deionized water, the first-stage water washing filtrate is added, CO2 gas is introduced for treatment, ferrous sulfate is added for stirring and reaction, a heavy metal chelating agent is added, and the pH of the system is adjusted for secondary water washing treatment; after filtration, the heavy metal chelating agent is separated from secondary fly ash residues, and the secondary water washing fly ash is obtained through drying; the secondary water washing fly ash is placed in deionized water, a heavy metal adsorbent is added for tertiary water washing treatment, the heavy metal adsorbent is separated from tertiary water washing fly ash residues through filtration, and the tertiary water washing fly ash is obtained through drying; and the final tertiary water washing fly ash achieves good purification effect in heavy metal leaching toxicity testing.

This invention discloses a soil conditioner for coal mine spoil heaps utilizing coal gangue and its preparation method. The method involves first crushing the coal gangue and then calcining it at high temperature, followed by activation and modification with citric acid to obtain modified coal gangue. This modified coal gangue is then mixed with biochar, humic acid, and polyacrylamide. Next, a self-prepared aqueous solution of a bifunctional polymer for heavy metal chelation and structural stabilization is added. This polymer, obtained by grafting thiol and chloromethyl groups and cross-linking, effectively immobilizes heavy metals and enhances soil aggregate structure. Simultaneously, a self-prepared silicate slow-release and microbial synergistic modifier, composed of sodium silicate and an organic network, is added. This modifier can be premixed with phosphate-solubilizing and nitrogen-fixing bacteria to achieve synergistic promotion of nutrient slow release and microbial activity. Finally, all materials are mixed, granulated, and dried at low temperature to obtain the final product. This invention significantly improves the soil structure of spoil heaps, immobilizes heavy metals, provides long-lasting nutrients, and promotes ecological restoration.

This invention discloses a method for preparing an acrylic macroporous anion exchange resin, comprising the following steps: 1) preparation of macroporous white spheres; 2) amination reaction; 3) transformation and post-treatment. This invention utilizes a synergistic technical solution of "rosin-based monomer-reinforced framework + composite porogen to construct a hierarchical porous structure + composite amination," resulting in anion exchange resin with good anion exchange capacity and heavy metal chelating ability, excellent synergistic treatment effect on multiple pollutants in complex wastewater, good thermal stability, high mechanical strength, good pore-forming effect, and high specific surface area. Furthermore, the entire preparation method involves mild reaction conditions, is easy to scale up for production, and has significant industrial application value.

This invention discloses a heavy metal chelating flocculant possessing both dual chelating groups, its preparation method, and its application. First, a polyethylene polyamine undergoes a nucleophilic addition reaction with carbon disulfide in the presence of a base, thereby forming a -CSS... － The acetate group is introduced at the non-terminal position of the polyethylene polyamine molecule, and then, under strongly alkaline conditions, undergoes an electrophilic substitution reaction with a haloacetate to introduce acetate groups at both ends of the molecule, thus giving the molecule both -CSS and ethyl acetate groups. － and —N(CH2COO) － 2. Two strong chelating groups. The two chelating groups in the molecule complement each other, working synergistically to significantly improve the chelation and binding ability and flocculation and precipitation performance of various heavy metal ions, achieving efficient removal of multiple heavy metals in one step. This invention overcomes the shortcomings of common chelating agents, such as single functional groups, weak chelation ability for some ions, and limited applicability; the preparation process is simple, the reaction conditions are mild, the operation and control are easy, the process is environmentally friendly, and it is easy to realize industrial production.