Adsorption of Heavy Metal Ions onto Green Microalga Chlamydomonas reinhardtii

被引：2

作者：

Kondo, Kazuo ^{[1
]}

Shigehisa, Hiromaro ^{[1
]}

Matsumoto, Michiaki ^{[1
]}

机构：

[1] Doshisha Univ, Dept Chem Engn & Mat Sci, Kyoto 6100321, Japan

来源：

PRES 2012: 15TH INTERNATIONAL CONFERENCE ON PROCESS INTEGRATION, MODELLING AND OPTIMISATION FOR ENERGY SAVING AND POLLUTION REDUCTION | 2012年 / 29卷

关键词：

SEAWEED BIOMASS; MARINE-ALGAE; BIOSORPTION; LEAD; SORPTION; CADMIUM; HG(II); NICKEL;

D O I：

10.3303/CET1229218

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microalga Chlamydomonas reinhardtii was used for adsorption of Pb(II), Fe(III) and Ni(II) ions. FT-IR analysis and pH titration of the algal biomass revealed the presence of amino, carboxyl and sulfonate groups, which were responsible for adsorption of the metal ions. The optimum pH for adsorption of Pb(II), Fe(III) and Ni(II) ions were found to be 5.0, 4.0 and 7.0, respectively. The adsorption equilibrium was established in about 200 min for Pb(II) and Fe(III) ions and 120 min for Ni(II) ion. The maximum adsorption capacities of the microalga for Pb(II), Fe(III) and Ni(II) ions were 1.47, 1.13 and 0.870 mmol/g-biomass, respectively. The order in metal affinity for the algal biomass was Fe(III)> Pb(II)> Ni(II). The adsorption equilibrium was well described by the Langmuir adsorption isotherm. C. reinhardtii could be considered as one of the suitable biosorbents for the removal of metal ions in waste water treatment because of the relatively high adsorption capacities. The biosorbents could be reused five times in consecutive adsorption/desorption cycles for Fe(III) ion with 25% loss in the adsorption capacity..

引用

页码：1303 / 1308

页数：6

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