Alkylphenol ethoxylates (APEOs) belong to the category of non-ionic surfactants and are
formatted during the reaction of an alkylphenol with ethylene oxide.
The major alkylphenols used for the production of APEOs are nonylphenol (NP) and octylphenol. Nonylphenol ethoxylates (NpnEOs) are widely used captivating approximately 80% of the surfactant world market while octylphenol ethoxylates take only 20%
Nonylphenol ethoxylates have been widely used in domestic detergents and cleaning industry. They are employed as well as emulsifiers, dispersants, antifoamers, dyeing assists, stabilizers, lubricants, spermicides and pesticide adjuvants. They occur in the aquatic environment through the effluents of the wastewater treatment plants.
During the wastewater treatment process, nonylphenol ethoxylates degrade and form more persistent and toxic metabolites that are detected mainly in the plant effluent. Biodegradation of NPnEO occurs with progressive shortening of the ethoxylate chain. The ethoxylates with 0,1 and 2 ethoxylate units (NP, NP1EO, NP2EO) are considered to be the metabolic products of NPnEO, together with carboxylated compounds (NP1EC, NP2EC)
Nonylphenol polyethoxylates are considered to be endocrine disrupting compounds. They are often detected in the final effluents of sewage treatment plants due to their persistence and absence of third-stage treatment. The effluent discharges pose a major environmental risk to the natural and human environment.
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This blog is nice.We manufacture and supply Dual and Multi graded pressure filters. Dual and multi graded pressure filters are used to remove TSS, free chlorine, phenol, taste and odour and reducing COD/BOD. Our Dual and multi graded pressure filters are manufactured from mild steel/ FRP closed vessel incorporating frontal piping fitted with valves.Dual and multi graded pressure filtersl.
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