ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Waste-to-coagulant approach: preparation of iron-based poly-ferric chloride from jarosite and its coagulation performance

Pushpendra Kushwaha and Madhu Agarwal

Department of Chemical Engineering, Malaviya National Institute of Technology, Jaipur, India

E-mail: magarwal.chem@mnit.ac.in

Received: 18 February 2026  Accepted: 22 May 2026

Abstract:

In this study, the synthesis of an iron-based coagulant from roasted jarosite is studied for wastewater treatment. Poly-ferric chloride (PFC) coagulant was synthesized from roasted jarosite through concentrated HCl acid leaching. Batch coagulation experiments were carried out with PFC coagulant for the removal of turbidity and dyes from wastewater. Coagulation experiments were conducted with the effects of coagulant dose (0.2–0.8 ml/L), pH (4.5–8.5pH), and initial concentration of dye (50–250 mg/L) and turbidity (10–50 NTU). The maximum removal of DR-80 dye and turbidity is more than 99% at 5.5 pH and 8.5 pH, respectively. The coagulation process with the synthesized PFC coagulant was performed for the removal of dye with adsorption from the dye industry wastewater. Therefore, we could conclude the treatment of dye industry wastewater using integrated processes, coagulation and adsorption.

Keywords: Coagulation; Coagulant; Wastewater; Jarosite; Dye effluent

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-026-05103-x

Chemical Papers 80 (10) 11921–11935 (2026)