TMT-15 organic sulphide heavy metal remover has been studied and produced by Germany Degussa company. It can achieve ideal results for all kinds of heavy metal containing wastewater treatment. In recent years, it has been designated by European and American countries. TMT15 heavy metal ion remover (organic sulfur) can be chelated with heavy metal ions to form water which is very hard to dissolve in water. The organic sulphide product with good chemical stability is TMT-15, and the removal rate of all kinds of heavy metals is more than 99%. After treatment, heavy metals are much lower than 0.5mg/L., mainly used in coal-fired power plants, municipal refuse incineration plants, electroplating factories, and battery factories. The treatment of heavy metal ions in photographic industry and other related industries is also suitable for various metal industries, heavy metal sludge solidification and other industries. It has good removal effect on Hg2+, Cd2+, Ag+, Pb2+, Cu2+, Cr3+, Zn2+ and so on.
TMT-15 is a heavy metal removal agent developed to protect good environment and avoid heavy metal pollution in waste water. Even if the dosage is very small, it also shows very high removal efficiency of heavy metals. Other heavy metal removal agents are also prone to selectively react with some heavy metals, but also have odor and toxicity. The TMT-15 produced by German technology has obviously overcome these problems. TMT-15 is a three azine component that can precipitate almost all monovalent and two valent metals, such as copper, cadmium, mercury, silver, lead and tin. Similarly, heavy metals that have been converted into complexes can also be removed. 15% of the TMT-15 solution is used to precipitate the monovalent and two valent heavy metals in the waste stream, especially for precipitation of mercury, copper, cadmium, silver, lead, nickel and tin. The significance of this product is that TMT-15 is less toxic and safer than similar heavy metal reagents.
Comparison of main environmental protection agents for removing heavy metal ions in China
Two sodium thiocarbamate
Acute toxicity LD50
Three thousand five hundred and ninety
Seven thousand eight hundred and seventy-eight
Lethal concentration LC
Thirteen thousand seven hundred and twenty
CS2+ two sulfurized four methyl Ulam
Removal efficiency of heavy metals
The removal efficiency of heavy metal ions is good. It can remove heavy metals from metal ions and some complex compounds, but it can not handle heavy metals in chelates and must be used in a narrow pH range.
The removal efficiency of heavy metal ions is good. It can remove metal ions and complexes and can be used directly in a wide range of PH.
The removal of heavy metal ions is very effective. It can remove all heavy metals in metal ions, complexes and chelates, and can be used directly in a wide range of PH.
Properties of precipitates produced by heavy metal ions
Small molecule inorganic precipitates are formed, which are easy to form suspension colloids and difficult to settle. The solubility of precipitates increases with the increase of temperature, and the sulphur precipitation reaction is less complete.
It is difficult to dissolve large molecular solid chelates. The precipitates are stable and easy to settle.
The formation of insoluble macromolecular solid chelates, under the condition of high temperature or strong current scouring, the sulfidation reaction is still complete, the precipitates are stable in nature and easy to settle.
Note: [LC50] is the critical concentration of drugs that result in the death of 50% of experimental fish. [LC0]b is the maximum concentration of pesticides for fish mortality.
It can be seen from the table that Na2S can not react with heavy metal ions to form chelates, and only form sulfide deposits. The stability of the precipitates is much less than that of the precipitation of chelates.
It can be seen from the table that DTC has strong coordination ability, and it can pass through one nitrogen atom and one sulfur atom. A total of two coordination atoms combine with heavy metal ions to form a stable chelate with a four membered ring.
It can be seen from the table that the coordination ability of TMT15 is strong. It can combine three heavy metals with six nitrogen atoms and three sulfur atoms to form a stable chelate with six four membered rings.
DTC forms a chelate of four atomic rings less than two TMT15 four rings. The transformation between the ions is carried out in the direction of producing more stable ions. Therefore, TMT15 has stronger ability to remove complexation in wastewater and chelate heavy metals.
TMT-15 is the introduction of German technology, combined with China's heavy metal ion wastewater actual water quality, high-tech environmentally friendly water treatment agent. This product can react with all kinds of heavy metal ions (mercury, lead, copper, cadmium, nickel, manganese, zinc, chromium, etc.) in the waste water at room temperature and react quickly to produce chelates which are insoluble in water and have good chemical stability. This product is mainly used for removal of heavy metal ions from desulfurized wastewater from coal-fired power plants (wet desulphurization process); removal of heavy metals from flue gas from refuse incineration plants; treatment of heavy metal ions in metallurgical, electroplating, electronic and chemical industries.
At present, the traditional chemical precipitation method can not meet the environmental requirements, and TMT-15 has been used for nearly 20 years in Europe and America without any known hazardous decomposition products. At the same time, many domestic institutions do comparative experiments, the effect is ideal! The treatment method is simple (which can be directly put on the original chemical precipitation device), low cost, and can meet the requirements of environmental protection when a variety of heavy metal ions coexist. Once the treatment is carried out, the environmental protection requirements can be achieved, even if the heavy metals exist in the waste water, such as EDTA, NH3, citric acid and so on, they can also play a full role. Easy, less sludge and stable non-toxic. After dosing, it will not change the color of water, and has no two characteristics of public hazards.