Enhanced flocculation activity of polyacrylamide-based flocculant for purification of industrial wastewater

Mahran Daifa, Eliyahu Shmoeli, Abraham J. Domb

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The flocculation activity of commercially available anionic poly (acrylamide-co-acrylic acid), p (AAm-co-AA) has been significantly improved, without any inorganic coagulant aid. The effect of three types of surfactants, anionic sodium lauryl ether sulfate (SLES) (Palm Epimen), nonionic cocamide DEA, zwitterionic amphoteric Amphotensid B5, and one organic cation, trimethylammonium bromide (TAB) on coagulation/flocculation performance have been investigated. The performance has been analysed in terms of turbidity, total suspended solid (TSS), total iron (TI) content, and BTEX for treating two kinds of industrial wastewater, produced water (PW) and starch water. We have shown that adding a small amount of each of the studied surfactants, and especially cationic TAB, significantly increases the coagulation/flocculation performance without modifying pH levels. A combination of low dosage of flocculant (310 ppb) and TAB (310 ppb), after 5 minutes, presented 88%, 81%, and 62% reduction in turbidity, TSS, and TI content, respectively, whereas by using 5 ppm of flocculant alone (16 times more), only 76%, 75%, and 43% removal was obtained. The results reveal that TAB performs as an efficient coagulant booster. Compared with regular inorganic coagulants, it is more cost-effective, reduces the consumption of treatment chemicals, and the pH-dependency of contaminants removal.

Original languageEnglish
Pages (from-to)2636-2646
Number of pages11
JournalPolymers for Advanced Technologies
Volume30
Issue number10
DOIs
StatePublished - 1 Oct 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 John Wiley & Sons, Ltd.

Keywords

  • TSS
  • flocculation
  • industrial wastewater
  • iron removal
  • polyacrylamide
  • polymer-surfactant complexes

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