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Product Description:
Under normal temperature and a wide pH range, it can react rapidly with Hg, CD, Cu, Pb, Mn, Ni, Zn, Cr3 + and other heavy metal ions in wastewater to form flocculent sediment insoluble in water and large alum, so as to achieve the purpose of capturing and removing heavy metal ions. (suitable for heavy metal wastewater in complexation state and chelation state)
1. Conventional heavy metal wastewater treatment, heavy metal ion capture of wastewater discharged from mining, electroplating, electronics, circuit board and other industries.
2. Metal ion capture of radioactive wastewater from nuclear power plant reactors, uranium and thorium hydrometallurgy plants, hospitals, isotope test reactors and production reactors.
3. It has a unique effect in the treatment of heavy metals in fly ash used in waste incineration power generation.
Stability and sensitivity
1. Stability: This product forms a stable polymer with heavy metal ions, which will not precipitate heavy metal ions in strong acid and strong alkaline environment. The heavy metal chelate is also very stable in the temperature range of - 100 ° C to 300 ° C. under natural environmental conditions, it can maintain long-term polymer stability, so as to ensure the environmental protection of subsequent sludge.
2. Sensitivity: it is very effective for trace metal ions in wastewater and can reduce the content of toxic metal ions in wastewater to 0.001mg/l.
3. Environmental protection: This product is a sulfur-free polymer, so it will not bring secondary pollution to the environment.
Quality index:
Index parameters | Qualified products |
Appearance | Light yellow liquid with slight ammonia smell. |
Free base% | ≤ 0.4% |
PH value | 9.5-12.5 |
Specific gravity (D20) | 1.17-1.19 |
Usage and reference dosage:
1. It is better to directly add it into the wastewater containing heavy metal ions, mix it evenly, increase the pH to 7-9, or add a small amount of polyacrylamide solution. The dosage is about 0.05-2/1000 of the wastewater, depending on the concentration of metal ions in the wastewater.
2. If the content of heavy metal ions in the wastewater is very high, first increase the pH of the wastewater with cheap lye to achieve the pretreatment of the wastewater, initially precipitate most of the heavy metal ions, then adjust the wastewater to neutral, add this product, and operate according to the first step.
For alkali neutralization precipitation method, the influence of pH value control conditions and the interaction during the coexistence of metal ions shall be considered, and the best pH value for the removal of various metal ions is listed as follows:
Metal ions | PH range | Residual concentration (mg/L) | remarks |
Cu2+ | 7-14 | ≤1 | |
Ni2+ | ≥9 | ≤1 | |
Sn2+ | 5-8 | ≤1 | |
Zn2+ | 9-10.5 | ≤1 | PH＞10.5 re dissolution |
Fe3+ | 5-12 | ≤1 | PH＞12 re dissolution |
Al3+ | 5.5-8 | ≤3 | PH＞8 re dissolution |
NaOH and Ca (OH) 2 are usually used as neutralizers. Under the interaction of multiple metal ions, the best pH value shall be determined on the premise that all heavy metal indexes of effluent meet the standard and on the principle of minimum dosage during commissioning. Packaging and storage: the product is packaged in 200kg and 1000kg plastic barrels. Store in a cool place at normal temperature for 12 months.
Manufacturing
