Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed
Cadmium biosorption properties of non-living, dried river green alga from a river source, and water hyacinth weed, Eichhornia crassipes from a lake in Zimbabwe have been investigated. The cadmium uptake was found to depend on initial pH, uptake being apparently minimal at low pH values and increasin...
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Taylor & Francis
2016
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| Online Access: | http://dx.doi.org.access.msu.ac.zw:2048/10.1080/02772240601010063 |
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| author | Mahamadi, Courtie Nharingo, Tichaona |
| author_facet | Mahamadi, Courtie Nharingo, Tichaona |
| author_sort | Mahamadi, Courtie |
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| description | Cadmium biosorption properties of non-living, dried river green alga from a river source, and water hyacinth weed, Eichhornia crassipes from a lake in Zimbabwe have been investigated. The cadmium uptake was found to depend on initial pH, uptake being apparently minimal at low pH values and increasing with an increase in pH. Cadmium biosorption kinetics by both samples is fast, with 80% of total uptake occurring within 60 min. The effect of initial solution pH and initial cadmium concentration on cadmium biosorption from a cadmium solution has been studied. The data for algal biomass fitted the Langmuir monolayer adsorption isotherm, while the biosorption of the metal by water hyacinth weed fitted the Freundlich adsorption isotherm with 1/n values all less than 1. Maximum metal uptake capacities were recorded using 0.35 g of biomass and a 250 mg L 1 cadmium solution at pH 6.5 and at 25 C and these were about 85 and 50 mg L 1 for water hyacinth weed and green alga, respectively, showing that water hyacinth weed offered a greater potential for cadmium uptake. The absorption was described by pseudo-second order rate model and the rate constant and equilibrium sorption capacity are reported. |
| format | Article |
| id | ir-11408-1163 |
| institution | My University |
| language | English |
| publishDate | 2016 |
| publisher | Taylor & Francis |
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| spelling | ir-11408-11632022-06-27T13:49:06Z Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed Mahamadi, Courtie Nharingo, Tichaona Cadmium(II), biosorption, water hyacinth weed, green alga, biotechnology Cadmium biosorption properties of non-living, dried river green alga from a river source, and water hyacinth weed, Eichhornia crassipes from a lake in Zimbabwe have been investigated. The cadmium uptake was found to depend on initial pH, uptake being apparently minimal at low pH values and increasing with an increase in pH. Cadmium biosorption kinetics by both samples is fast, with 80% of total uptake occurring within 60 min. The effect of initial solution pH and initial cadmium concentration on cadmium biosorption from a cadmium solution has been studied. The data for algal biomass fitted the Langmuir monolayer adsorption isotherm, while the biosorption of the metal by water hyacinth weed fitted the Freundlich adsorption isotherm with 1/n values all less than 1. Maximum metal uptake capacities were recorded using 0.35 g of biomass and a 250 mg L 1 cadmium solution at pH 6.5 and at 25 C and these were about 85 and 50 mg L 1 for water hyacinth weed and green alga, respectively, showing that water hyacinth weed offered a greater potential for cadmium uptake. The absorption was described by pseudo-second order rate model and the rate constant and equilibrium sorption capacity are reported. 2016-05-02T13:20:45Z 2016-05-02T13:20:45Z 2007 Article 0277-2248 http://dx.doi.org.access.msu.ac.zw:2048/10.1080/02772240601010063 en Toxicological & Environmental Chemistry;Vol. 89, No. 2; p. 297–305 none Taylor & Francis |
| spellingShingle | Cadmium(II), biosorption, water hyacinth weed, green alga, biotechnology Mahamadi, Courtie Nharingo, Tichaona Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed |
| title | Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed |
| title_full | Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed |
| title_fullStr | Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed |
| title_full_unstemmed | Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed |
| title_short | Modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed |
| title_sort | modelling the kinetics and equilibrium properties of cadmium biosorption by river green alga and water hyacinth weed |
| topic | Cadmium(II), biosorption, water hyacinth weed, green alga, biotechnology |
| url | http://dx.doi.org.access.msu.ac.zw:2048/10.1080/02772240601010063 |
| work_keys_str_mv | AT mahamadicourtie modellingthekineticsandequilibriumpropertiesofcadmiumbiosorptionbyrivergreenalgaandwaterhyacinthweed AT nharingotichaona modellingthekineticsandequilibriumpropertiesofcadmiumbiosorptionbyrivergreenalgaandwaterhyacinthweed |