New materials quickly “remove” soil heavy metal pollution

A new type of magnetic solid chelating agent technology that can remove heavy metal pollution in soil. It was jointly developed by China University of Geosciences (Wuhan) and the Institute of Agricultural Environment and Sustainable Development of the Chinese Academy of Agricultural Sciences. It has recently passed science and technology in Beijing. Evaluation of results.

Xu Yingming, a researcher at the Environmental Protection Research Institute of the Ministry of Agriculture, said that the material has the dual functions of solid phase sequestration and magnetic separation, and has a separation and purification effect on various forms of non-magnetic heavy metal elements in the soil. The material structure is original and has independent intellectual property rights; in the same kind of research, the technology has reached the international advanced level.

Song Jiqing, a researcher at the Institute of Agricultural Environment of the Chinese Academy of Agricultural Sciences, said that the technology relies on the principle of adsorption of inorganic-organic hybrid composite water-retaining agent in the “12th Five-Year Plan” National 863 Program. The new material purification and repair process has less soil chemical disturbance and is repaired in farmland soil. It has a big advantage.

Fan Liren, a professor at China University of Geosciences (Wuhan), said that magnetic solid chelating agent particles can “target chelate passivation” harmful heavy metals in the soil, reduce the absorption of crops, and can quickly load the magnetic field during fallow farming. The magnetic material of the heavy metal is separated from the soil, so that the heavy metal of the soil is “removed and reduced” to directly eliminate the hidden danger of heavy metals being reactivated by soil organisms or other reasons. The material can be recycled and reused. The cost of tons of soil treatment materials can be as low as 2-10 yuan per element.

According to the Wuhan Mineral Resources Supervision and Inspection Center of the Ministry of Land and Resources, the removal rates of cadmium and lead in the soil samples were 77% and 73.6%, respectively. Surface soil purification tests near the Zhuzhou lead-zinc smelter in Hunan showed that the removal rate of cadmium and lead was about 75%, and the removal rate of zinc was about 50%. The content of lead and cadmium decreased from 40.15 mg/kg to 1.28 mg/kg, which was close to the natural background value of the soil and the national secondary standard. The removal effect was significant; and it was evaluated by users as “satisfactory soil pollution. effect".

The glass beads are used for road marking paints and thermoplastic road marking material to provide excellent night retro-reflectivity.  reflctvie BS 6088 A glass beads , BS6088 B glass beads ,  can be treated with drop on and intermixt  road marking glass beads when used for the marking line for the road. 

Specification for solid glass beads for use with road marking compounds and for other industrial uses,Glass, Waterproof materials, Particle size distribution, Defect counting, Marking, Sampling methods, Refractive index, Optical measurement, Magnetic materials, Corrosion tests, Water-resistance tests, Coatings, Reinforced materials, Plastics, Road marking, Quality assurance, Particle size measurement, Spherical shape, Weight measurement, Flotation agents, Acid-resistance tests.

BS6088 Standard Roadmarking Glass Beads are solid, spherical glass beads for use with thermosplastic roadmarking materials and traffic paint.Class A and Class B are high quality glass microspheres resulting from the specialized processing of selected glass cullet.

glass beads are a major factor in increasing road safety in an economical manner.Thanks to the beads' retro-reflective action at night, a vehicle's headlight beam is returned to the driver's eye.The microspheres not only multiply the visibility of the road markings at night, but also increase the marking's durability in general. glass beads are used as a drop-on agent and as premix beads for roadmarking materials.

Coated : Higher reflectivity than uncoated.Therefore best suited to use on high rainfall highway roads.

Uncoated:Increase the visibility of traffic lines /road markings especially at night.

Available in various sizes suitable for water based / solvent based road marking paints and thermoplastic material.

Can be used in a drop on application or premixed with road marking paint or thermoplastic.

Chemically inert and environmentally friendly.

BS6088 Glass Beads

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