Pseudo-isotherms for the sorption of cadmium ion onto tree fern |
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| Institution: | 1. School of Public Health, Taipei Medical University, No. 250 Wu-Hsing Street, Taipei, Taiwan;2. Bibliometric Centre, Taipei Medical University, Wan-Fang Hospital, 111 Hsing-Long Road Sec. 3, Taipei 116, Taiwan;1. College of Life Science, Foshan University, No. 1 Xianhu University Road, Nanhai, Foshan, Guangdong 528231, China;2. College of Biophotonics, South China Normal University, Guangzhou, Guangdong 510631, China;3. Holdone Aquaculture Breeding Limited Company, Foshan, Guangdong 528231, China;1. College of Water Sciences, Beijing Normal University, Beijing 100875, PR China;2. College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China;1. School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India;2. CRDT, IIT Delhi, New Delhi, India;3. Cleveland Clinic, Cleveland, USA;1. Engineering Ecology Department, Kazan National Research Technological University, 68 Karl Marx Street, Kazan 420015, Russian Federation;2. Department of Foreign Languages for Professional Communication Kazan National Research Technological University, 68 Karl Marx Street, Kazan 420015, Russian Federation |
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| Abstract: | The kinetics of cadmium sorption on to tree fern has been investigated based on the assumption of a pseudo-second order rate law. The batch sorption model has been applied to predict the rate constant of sorption and the equilibrium capacity with the effect of initial cadmium concentration. The experimental results have been analysed by pseudo-Langmuir, pseudo-Freundlich and pseudo-Redlich–Peterson isotherms based on pseudo-second order kinetic expression constant. Both pseudo-Langmuir and pseudo-Redlich–Peterson isotherms were found to represent the measured sorption data well. According to the evaluation using the pseudo-Langmuir equation, the monolayer sorption capacity was obtained to he 16.3 mg/g. In addition, χ2 analysis was also used to determine the most suitable model. Pseudo-Langmuir and pseudo-Redlich–Peterson were also the best models for the experiment data from χ2 analysis. |
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