Chemical wastewater is a common industrial wastewater, which contains organic and inorganic substances, heavy metals, alkaline substances and acidic substances. These wastewater will cause great harm to the environment and human health, so effective treatment is required. Polyaluminium chloride, as a widely used water treatment chemical, can be effectively used to treat chemical wastewater.
The chemical structure of PAC is Aln (OH) mCl3n-m, where n denotes the degree of polymerization and M denotes the proportion of OH^-. It has good flocculation and sedimentation properties and can react with organic and inorganic substances in wastewater, thus removing these harmful substances from water.
The treatment process of PAC is usually divided into three steps: mixing, flocculation and precipitation. In the mixing phase, PAC is added to the chemical wastewater to form a positively charged PAC ion (Aln (OH) m3n-m+). During the flocculation phase, these ions react with organic and inorganic substances in wastewater to form sediments or gelatinous substances. During the settling phase, these sediments settle to the bottom by gravity, thereby removing harmful substances from the wastewater.
One of the advantages of PAC in treating chemical wastewater is that it can simultaneously remove many harmful substances from wastewater. In addition, PAC can also regulate the pH value of water to a certain extent, which makes water more suitable for subsequent treatment or discharge. In addition, the treatment process of PAC is simple and easy to operate and maintain.
In general, PAC is an effective water treatment chemical and can be used to treat chemical wastewater. In practical application, it is necessary to select proper PAC according to the nature of wastewater and treatment requirements.
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