When it comes to heavy metals, they are very common in our daily life, and some are even indispensable elements in the human body. What are the main sources of heavy metals in wastewater? They are respectively from the wastewater discharged by enterprises such as mines, electroplating, pharmaceuticals, paints, and pigments. The types and contents of heavy metals present in different enterprises may also vary.
How to treat heavy metals in wastewater and ensure that they meet relevant standards before being discharged? Since metals cannot be decomposed or destroyed, they can only be relocated and their physical and chemical forms transformed. For instance, after the wastewater undergoes chemical precipitation treatment, the heavy metals in the wastewater change from dissolved ionic forms to insoluble compounds and precipitate, and then transfer from the water to the sludge. After the ion exchange treatment, heavy metal ions are transferred to the ion exchange resin. After regeneration, they are transferred from the ion exchange resin to the regeneration waste liquid.
In addition, heavy metals in the wastewater should be treated on-site at the source and must not be mixed with other wastewater to avoid making the treatment process too complicated. Never, just because you find it troublesome, directly discharge heavy metals in wastewater into urban sewers without treatment, which will cause serious pollution. It can mainly be divided into two situations:
1.When heavy metals are in a dissolved state in wastewater, they are transformed into insoluble metal compounds or elements, which are then removed from the wastewater through sedimentation and flotation.
2.The heavy metals collected in the wastewater are concentrated and separated without changing their chemical forms. It can be used in different ways according to the quality and quantity of the wastewater and other conditions.
Heavy Metals Mainly Include: iron, silver, tin, copper, cadmium, chromium, etc. To detect these different heavy metal elements in water, a water quality analyzer is needed. The analyzers used for different heavy metal elements will vary. For instance, the total copper online analyzer is used to measure the copper content in water, while the total tin online analyzer, of course, measures the tin content in water. By analogy, check the corresponding instruments used for detecting different heavy metals.
