Adsorption of Cr(Ⅵ) by Dry Powder of Potamogeton crispus

doi:10.11944/j.issn.1000-0518.2015.07.140392

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (7): 825-830.DOI: 10.11944/j.issn.1000-0518.2015.07.140392

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Adsorption of Cr(Ⅵ) by Dry Powder of Potamogeton crispus

REN Yidan, WANG Aili^*

Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong,Dezhou University,Dezhou,Shangdong 253023,China

Received:2014-11-14 Accepted:2015-03-25 Published:2015-06-30 Online:2015-06-30
Contact: Aili WANG
Supported by:
Supported by the Natural Science Foundation of Shandong Province (Combination Research Projects)(No.ZR2013BL001), Talent Introduction Subject of Dezhou University (No.2003kjrc06), National Project of Training Programs of Innovation and Entrepreneurship for Undergraduates (No.201410448030)

Abstract

Abstract:

The dry powder of Potamogeton crispus was developed as an efficient biosorbent material for the removal Cr(Ⅵ) from wastewater. The effects of adsorption equilibrium time, grain size of adsorbent particles, initial pH, the dosage of adsorbent, initial concentration of Cr(Ⅵ), and ionic strength on the adsorption performance were investigated by single-factor experiments. The adsorption process follows the pseudo second-order kinetic with a correlation coefficient (R²) of 0.9998. The experimental data fit with Langmuir isotherm model. The maximum adsorption capacity of Cr(Ⅵ) by Potamogeton crispus is 35.0 mg/g.

Key words: Potamogeton crispus, biosorbent, heavy metal, adsorption kinetics

CLC Number:

REN Yidan, WANG Aili. Adsorption of Cr(Ⅵ) by Dry Powder of Potamogeton crispus[J]. Chinese Journal of Applied Chemistry, 2015, 32(7): 825-830.

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Adsorption of Cr(Ⅵ) by Dry Powder of Potamogeton crispus

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