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Environmental Engineering Research 2018;23(4): 364-373. DOI: https://doi.org/10.4491/eer.2017.207
Application of hybrid material, modified sericite and pine needle extract, for blue-green algae removal in the lake
Hee-Jeong Choi
Department of Health and Environment, Catholic Kwandong University, Gangneung 25601, Republic of Korea
Corresponding Author: Hee-Jeong Choi ,Tel: +82-33-649-7297, Fax: +82-33-647-7635, Email: hjchoi@cku.ac.kr
Received: December 12, 2017;  Accepted: March 26, 2018.
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ABSTRACT
The present study assessed the efficient removal of nutrients and Chlorophyll-a (Chl-a) by using methyl esterified sericite (MES) and pine needle extracts (PNE), a low cost and abundant green hybrid material from nature. For this purpose, the optimal conditions were investigated, such as the pH, temperature, MES and PNE ratio, and MES-PNE dose. In addition, a Microcystis aeruginosa control using MES-PNE was also analyzed with various inhibition models. The removal of the nutrient and Chl-a onto MES-PNE was optimized for over 95% removal as follows: 2-2.5 for the MES-PNE ratio, 7-8 pH and a 22-25°C temperature. In this respect, approximately 1.52-2.20 g/L of MES-PNE was required to remove each 1 g of dry weight/L of Chl-a. Total phosphorus (TP) has a greater influence on the increase in Chl-a than total nitrogen (TN) according to the correlation between TN, TP and Chl-a. Moreover, the Luong model was the best model for fitting the biodegradation kinetics data from Chl-a on MES-PNE from lake water. The novel hybrid material MES-PNE was very effective at removing TN, TP and Chl-a from the lake and can be applied in the field.
Keywords: Algal blooms | Blue-green algae | Inhibition model | Methylesterified-sericite | Nutrient removal | Pine needle extract
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