Abstract
A new modified hydrophobic organic polymer P(AM-DM-DMC12) is synthesized by free radical polymerization of three monomers in aqueous solution using a REDOX initiator system. Its structure is characterized by FT-IR and 1H-NMR, the effect of reaction conditions on the product is studied, and the flocculation performance and mechanism are discussed with the aim of wastewater turbidity and COD removal rate. The results showed that the synthesized compounds accorded with the target structure, and the optimum synthetic conditions are as follows: the molar ratio of AM, DM, and DMC12 is 4 : 1 : 1, total mass fraction of monomer is 35%, the mass fraction of redox initiator is 0.06%, and the molecular weight of P(AM-DM-DMC12) is 1.02×107. Moreover, the flocculation effect of P(AM-DM-DMC12) is obviously better than that of PAM, and it has the advantages of short flocculation time, low dosage, and wide application range of pH and has a good industrial application value and prospect.
Highlights
IntroductionA flocculation sedimentation method plays an important role in the process of sewage treatment, which mainly makes use of the electrical neutralization, adsorption bridge, and electrostatic force of flocculant to coagulate with colloidal particles, solutes, and suspended solid particles in sewage to form larger floc and destabilize and settle [1,2,3]
The flocculation effect of P(AM-dimethyl-ethyl methacrylate (DM)-DMC12) is obviously better than that of PAM, and it has the advantages of short flocculation time, low dosage, and wide application range of pH and has a good industrial application value and prospect
A flocculation sedimentation method plays an important role in the process of sewage treatment, which mainly makes use of the electrical neutralization, adsorption bridge, and electrostatic force of flocculant to coagulate with colloidal particles, solutes, and suspended solid particles in sewage to form larger floc and destabilize and settle [1,2,3]
Summary
A flocculation sedimentation method plays an important role in the process of sewage treatment, which mainly makes use of the electrical neutralization, adsorption bridge, and electrostatic force of flocculant to coagulate with colloidal particles, solutes, and suspended solid particles in sewage to form larger floc and destabilize and settle [1,2,3]. This method can reduce the turbidity and chroma of sewage and remove the water of a variety of macromolecule organic substances, heavy metals, and radioactive substances, which can become an independent processing system and be combined with other processing units as pretreatment, intermediate, or final processing process of sewage [4, 5], and is often used to improve the dehydration properties of sludge [6,7,8]. Its structure was characterized by FT-IR and 1H-NMR, and the synthetic conditions, flocculating properties, and flocculating mechanism were discussed to provide theoretical reference and basis for the development and application of the new flocculant
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