Organic sulfur combines stably with heavy metal ions and chemical reactions occur, forming stable organometallic compounds, which are not easy to dissolve, forming solid precipitation in aqueous solution, and then being separated and removed. This is a stoichiometric reaction. In the heavy metal family, the heavy metal compounds formed by mercury and cadmium have low solubility. Organic sulfur is mainly used as heavy metal settling agent in waste water in wet flue gas desulfurization.
Common water pollution metals include: mercury, cadmium, manganese, chromium, copper, nickel, zinc, lead, arsenic, etc. Heavy metals cannot be replaced during industrial processing, therefore, heavy metal ions in wastewater exceed the standard. Because of their toxicity, they cannot be naturally decomposed after being discharged beyond the standard. Therefore, the content of heavy metal ions in wastewater and waste gas is strictly limited by the state.
◆ the treatment method is simple, and heavy metal ions can be removed by direct delivery.
◆ strong chelating ability and stable sediment
◆ safe operation, non-toxic and non-hazardous
◆ The amount of sludge is small and stable, and the post-treatment is simple.
◆ no secondary pollution, no damage to the ecology
◆ good use effect in various waste water fields
◆ first detect the content of various heavy metal ions in the wastewater, and then determine the dosage of the medicament through the simulated dosing test of the wastewater; (the recommended dosage is 40 ~ 140ppm)
◆ before adding the reagent, the pH value of the waste water should be adjusted to neutral or alkalescence with lime;
◆ determine the dosage of the medicament on the day according to the amount of wastewater to be treated every day. After dilution in the dedicated dosing system, the wastewater will be treated together with coagulant and accelerator.
◆ After the wastewater is concentrated and settled, it is filtered and pressed by a filter press. Filter cake of the heavy metal can be buried deeply, and the filtrate can be discharged up to standard after neutralization.