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J Korean Soc Environ Eng > Volume 38(4); 2016 > Article
J Korean Soc Environ Eng 2016;38(4): 169-176. doi: https://doi.org/10.4491/KSEE.2016.38.4.169
수처리용 Fe(III)계 응집제의 특성 및 응집특성 비교
한승우2, 강임석1
1부경대학교 환경공학과
2이에프티 기업부설연구소
Comparison of Fe(III) Coagulants and their Characterization for Water Treatment
Seung Woo Han2, Lim Seok Kang1
1Department of Environmental Engineering, Pukyong National University
2EFT R&D Center
Corresponding author  Lim Seok Kang ,Tel: 051-629-6527 , Fax: 051-629-6523, Email: kangls@pknu.ac.kr
Received: January 19, 2016;  Revised: February 19, 2016;  Accepted: March 9, 2016.  Published online: April 30, 2016.
ABSTRACT
This research explored the feasibility of preparing and utilizing preformed polymeric solution of Fe(III) as coagulants for water treatment. The differentiation and quantification of hydrolytic Fe(III) species in coagulant was done by utilizing spectrophotometric method based on the interaction of Fe(III) with Ferron as a complexing agent. The properties of the synthesized polymeric iron chloride (PICl) showed that the quantity of polymeric Fe(III) produced at r = 1.5 was 20% of the total iron in solution, as showing maximum contents. Coagulation experiments were conducted under the condition of various coagulant doses and pH for each coagulant prepared. From the comparison of the characterization of coagulation for FeCl3 (r = 0.0) and PICl (r = 0.5, 1.0, 1.5) coagulants, PICl (r = 0.5, 1.0, 1.5) coagulants was found to be more effective than other coagulant for the removal of organic matters. The experimental results for the coagulation tests at various pH ranges showed that the PICl was least affected by the coagulation pH and PICl was very effective for the removal of turbidity and organic materials over wide pH range (pH 4-9) tested.
Key Words: Coagulant, Basicity, Polymeric, Ferric, Coagulation
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