Adsorption of 4-Nonylphenol in Water by Organic Clay and Bamboo Charcoal
Date Issued
2006
Date
2006
Author(s)
Hsieh, Hui- Ju
DOI
zh-TW
Abstract
Nonylphenol is an endocrine disruptor that is able to interfere the functions of endocrines resulting in reproductive, developmental and/or carcinogenic effects. It is a globe-wide environmental contaminant and can not effectively removed by the routine water treatment. Its removal from water by adsorption has expected to be one of the promising ways. Thus, this study looked into the adsorption of 4-nolyphenol in water by adsorbents. One organic clay and four bamboo charcoals were tested just because they are proposed to be the porous materials with great specific surface areas and are getting more and more popular in Taiwan.
Adsorption isotherm test for each adsorbent was performed at 25℃ for 15 hours by adding 0.3 mg adsorbent into 100 mL aqueous solution containing five levels of 4-nonylphenol. The kinetic of adsorption for the adsorbents with good performance, that are Cloisite®15A and bamboo charcoal MOB2 were also observed. The results show that the Cloisite®15A had the best removed rate with 95% confidence interval of 74.38 4.31%, while the others had 54.92 14.59%, 53.31 14.59%, and 24.25 11.05% for bamboo charcoal MOB2, bamboo charcoal MOB3 and bamboo charcoal MOB1, respectively. Only the bamboo charcoal MOB4 did not demonstrate its adsorption capability of removing nonylphenol. The adsorption well fit the Freundlich isotherm with R2 in 0.73 - 0.99. The kinetic of adsorption indicated that the equilibrium was reached after 4 hours for the system with the Cloisite®15A, compared with 15 hours for the one with the bamboo charcoal MOB2. It is concluded that the Cloisite®15A is a more efficient adsorbent for application on the removal of 4-nonylphenol in water than bamboo charcoals.
Subjects
壬基苯酚
等溫吸附
有機黏土
竹碳
nonylphenol
adsorption
organic clay
bamboo charcoals
Type
thesis
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