With the rapid development of industry, the pollution caused by heavy metal wastewater to the environment is becoming more and more serious. As an effective means to solve this problem, heavy metal water treatment technology has been widely used in the field of environmental protection.
Heavy metal water treatment technology method.
1.Precipitation method: By adding a precipitant to the wastewater, the heavy metal ions react with the precipitant to form a poorly soluble precipitate, so as to achieve the removal of heavy metals. Commonly used precipitants include lime, sulfides, etc.
2.Adsorption method: The adsorption effect of the adsorbent is used to adsorb the heavy metal ions in the wastewater on the surface of the adsorbent, and then the adsorbent is separated from the wastewater through solid-liquid separation technology, so as to achieve the removal of heavy metals. Commonly used adsorbents include activated carbon, zeolite, etc.
3.Filtration method: Suspended solids and particulate matter in wastewater are removed through filtration equipment, so as to achieve the purpose of removing heavy metals. Commonly used filtration equipment includes sand filters, activated carbon filters, etc.
4.Redox method: By adding oxidants or reducing agents to wastewater, heavy metal ions undergo redox reactions, so as to achieve the removal of heavy metals. Commonly used oxidants and reducing agents include ozone, hydrogen peroxide, sulfites, etc.
5.Biological method: the use of microorganisms to enrich, transform and degrade heavy metals, so as to achieve the purpose of removing heavy metals. Commonly used biological methods include bioadsorption, bioprecipitation and biodegradation.