Heavy Metal Ion Capturing Agent ZX-819
Heavy metal capturing agents are chemical agents that chelate with ions. They are called heavy metal capturing agents because they can chemically react with various heavy metal ions in wastewater, such as Cu2?, Cd2?, Hg2?, Pb2?, Mn2?, Ni2?, Zn2?, Cr3?, under normal temperature and a wide range of conditions, rapidly generating insoluble, low-moisture, easily filterable flocculent precipitates in a short time, thereby removing heavy metal ions from sewage.
Physical Properties
1. Precipitates metals over a wide pH range
2. Enables plant recycling
3. Can be used in conventional treatment processes or as a wastewater treatment polishing agent
4. Effective for various metals such as chromium, copper, lead, mercury, silver, and zinc
5. Simple treatment method, no need for new equipment; only the addition of the capturing agent is required to remove heavy metals
6. The capturing agent can complex with heavy metal ions to form good flocs
7. Excellent flocculation effect, with low sludge volume and easy dewatering.

Product Description

Heavy metal capturing agents are liquid metal precipitants. They can precipitate metal ions, reducing the concentration of metal ions in wastewater. This product is often used as a polishing step after traditional metal precipitation processes (such as hydroxide precipitation). Compared to conventional techniques for precipitating high concentrations of metal ions, it is considered one of the alternative methods.
A good heavy metal capturing agent, due to its strong chelating properties, reacts not only under normal temperature and a wide range of conditions but is also unaffected by the concentration of heavy metal ions. Even if the wastewater contains complexing agents, it can precipitate various heavy metal ions in one step, bringing the wastewater up to discharge standards.

There are two main synthetic pathways for heavy metal capturing agents: one involves monomers containing chelating groups prepared through addition polymerization, condensation polymerization, step-growth polymerization, or ring-opening polymerization; the other utilizes synthetic or natural polymers to introduce chelating functional groups via polymer chemical reactions. In practical research and application, the most commonly used heavy metal capturing agents fall into two categories: xanthate esters and dithiocarbamate derivatives (DTC class), with DTC derivatives being the most widely used. Industries of Use
1. Heavy metal removal in wastewater treatment
2. Heavy metal removal in wastewater treatment from electronic circuit board factories
3. Heavy metal removal in mine tailings wastewater treatment
4. Heavy metal removal in metallurgical wastewater treatment
5. Heavy metal removal in wastewater treatment from chemical and leather industries.
Agent Characteristics
1. Strong chelating ability to chemically react with heavy metals to form insoluble substances, especially effective for mercury and cadmium, primarily used in wet sulfur processes
2. Can adsorb almost all heavy metals; in wastewater treatment, it can remove all dissolved residual heavy metals through simple treatment
3. Metal-precipitate complexes have good thermal stability, making it difficult for heavy metals to be released back into the environment; it is an environmentally friendly heavy metal capturing agent
4. Good toxicological and biological characteristics, with very low toxicity
5. Good storage stability and operability; not classified as hazardous, mostly odorless, and does not release toxic substances. Dosing and Usage Requirements Heavy metal capturing agents should be dosed at the point after the secondary sedimentation tank and used in conjunction with original PAM. They can be added in conventional treatment processes. They are easy to mix and dilute with water. Therefore, they can be diluted with water to any required concentration to meet the capacity requirements of the dosing pump. High-quality dilution water with a near-neutral pH should be used. The product can be applied in high-turbulence areas, such as pump suction inlets. In practice, when adding the heavy metal capturing agent to the solution, the treated water should be stirred to allow the metal precipitates to fully react before settling. Storage tanks can be made of polypropylene, stainless steel (304 or 316), or high-density cross-linked polyethylene (HDCLPE). Rigid PVC, stainless steel, HDCLPE, polypropylene, Viton, Buna-N rubber, and polyethylene are recommended for piping and installation materials. Avoid using carbon steel, brass, zinc, and other metallic materials for piping and storage tanks.
Packaging and Storage Heavy metal capturing agents are liquid mixtures, packaged in 25Kg containers. They should be stored in a cool, dry environment. Keep the container tightly closed when not in use. Avoid freezing.