Optimization of coagulation with PFS-PDADMAC composite coagulants using the response surface methodology experimental...

Area of Science:

• Environmental Chemistry
• Water Treatment Technologies
• Polymer Science

Background:

• Coagulation is a critical step in water purification.
• Developing efficient composite coagulants is essential for improving water quality.
• Optimizing coagulation parameters like dose and pH is key to effective treatment.

Purpose of the Study:

• To prepare and evaluate two novel composite coagulants, PFPD1 and PFPD2.
• To compare their performance against the inorganic polymer coagulant PFS.
• To determine optimal coagulation conditions (dose and pH) for minimizing residual turbidity and TOC.

Main Methods:

• Preparation and characterization of PFPD1 and PFPD2 composite coagulants.
• Application of Response Surface Methodology (RSM) to study dose and pH effects.
• Optimization of coagulation-flocculation process parameters.

Main Results:

• Optimal conditions varied for each coagulant: PFS (204 mg/L, pH 8.06), PFPD1 (179 mg/L, pH 7.99), PFPD2 (112 mg/L, pH 7.65).
• PFS demonstrated the highest effectiveness in reducing residual turbidity.
• PFPD2 exhibited the greatest efficiency in decreasing residual total organic carbon (TOC).

Conclusions:

• RSM is a suitable approach for optimizing coagulation-flocculation processes.
• PFPD2 offers a promising alternative for TOC reduction in water treatment.
• The study provides valuable insights into selecting and optimizing coagulants for specific water quality challenges.