Why is polyacrylamide important in water treatment?

With the development of environmental protection, sewage and sludge produced in the process of water treatment disposal, people pay more and more attention. The polyacrylamide (PAM) has a very important role in the field of water treatment.

What is a polyacrylamide soluble polymer?

Polyacrylamide: This is a water-soluble polymer formed from acrylamide (a compound with a molecular formula C 3 H 5 NO) subunits. PAMs is most often used to increase the viscosity of water (creating a thicker solution) or to encourage the flocculation of particles present in water.

How much Acrylamide is in groundwater?

In a monitoring study on the water circuit of the quarry, acrylamide levels were between 1.01 and 5.66 μg/L in treated water and between 0.08 and 0.41 μg/L in supernatant water, and contamination with 0.01–0.02 μg/L was also measured in groundwater .

How much Acrylamide is in drinking water?

The United States used 65% of the produced PAM for water treatment in 1991. The guidelines set by the World Health Organization (WHO) and EU for residual acrylamide concentration in drinking water are 0.5 and 0.1 μg/L, respectively. The US EPA requires the water supplier to notify them when acrylamide is added to water.

What is acrylamide used for?

Acrylamide, an unsaturated amide and the main monomer of polyacrylamides (PAMs) is used as flocculants in drinking water clarification and in municipal or industrial effluents treatment; and as a grouting agent in dams, wells, and reservoirs.

How much Acrylamide is in food?

The Food and Agriculture Organization (FAO) and WHO stated that food makes a significant contribution to the overall exposure of the general public to acrylamide, with average intake rates (0.3–0.8 μg/kg of bw/day). Acrylamide levels in frequently consumed foods are 5–460 times greater than the maximum residual acrylamide levels probable in water.