Enhanced removal of phosphate on modified ion exchanger with competing ion and proposal of efficient recovery technology

Title
Enhanced removal of phosphate on modified ion exchanger with competing ion and proposal of efficient recovery technology
Authors
이상협최재우박기영안병렬
Keywords
Phosphate; Ion exchanger; Removal; Recovery
Issue Date
2013-06
Publisher
2013 International Environmental Engineering Conference and Annual Meeting of the Korean Society of Environmental Engineers
Abstract
The concern for dissolved phosphate in water/wastewater has been increasing because of the risk for eutrophication. A variety of conventional and advanced technologies were applied to meet the enforced new regulation of phosphate around the world. However, there still remained a lot of challenge because most introduced/developed method, for example, biological and physic-chemical treatment is not easy to satisfy the new regulation of phosphate in water. In order to meet the new regulation, the application of ion exchanger has been tried which showed that the removal efficiency for phosphate was strongly determined by in the presence of the competing ion, especially sulfate. As results, a new class of ion exchanger governed by ligand exchange was developed and investigated to increase the selectivity for phosphate. The current study using organic/inorganic anion exchanger developed with Lewis acid-base interaction confirms the selectivity for phosphate over sulfate. According to isotherm test and column test, the value of the maximum phosphate uptake (Q) showed 64 mg/g as po4 and the breakthrough for phosphate occurs after 1000 min and completely finishes at 2500 min, respectively.
URI
http://pubs.kist.re.kr/handle/201004/45149
Appears in Collections:
KIST Publication > Conference Paper
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