Next Article in Journal
Efficient Nitrogen Removal of Reject Water Generated from Anaerobic Digester Treating Sewage Sludge and Livestock Manure by Combining Anammox and Autotrophic Sulfur Denitrification Processes
Next Article in Special Issue
Adsorption of Phosphates from Aqueous Solutions on Alginate/Goethite Hydrogel Composite
Previous Article in Journal
Socioeconomic Factors Affecting Water Access in Rural Areas of Low and Middle Income Countries
Previous Article in Special Issue
Indication of Groundwater Contamination Using Acesulfame and Other Pollutants in a Rural Area of Korea
Open AccessArticle

Halloysite Nanotubes as Adsorptive Material for Phosphate Removal from Aqueous Solution

1
Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, Germany
2
Faculty of Civil & Environmental Engineering, Jimma University, Jimma 378, Ethiopia
3
Durtec GmbH, Genzkower Strasse 7, 17034 Neubrandenburg, Germany
*
Author to whom correspondence should be addressed.
Water 2019, 11(2), 203; https://doi.org/10.3390/w11020203
Received: 30 November 2018 / Revised: 18 January 2019 / Accepted: 21 January 2019 / Published: 24 January 2019
(This article belongs to the Special Issue Water Pollution and Treatment: Challenges and Opportunities)
In this study, we were aiming at testing halloysite nanotubes as an efficient adsorbent for the removal of phosphate from agricultural runoff. Adsorption of phosphate onto powder and granular form of halloysite nanotubes has been examined by using the classical batch method and diffusion experiments at room temperature. Different forms of halloysite nanotubes were investigated to explore the effect of structure on the adsorption of phosphate. The maximum adsorption efficiency was obtained for powder halloysite nanotubes (79.5%) and granular form (94.7%). It is believed that the pore space of the granular halloysite nanotubes accommodates phosphorus in addition to physico-chemically bound phosphate at surfaces. The pseudo-first order and pseudo-second order model fitted well the experimental kinetic data for both powder and granular form of halloysite nanotubes. The fit of the Freundlich isotherm model was superior as compared with the Langmuir approach, implying that the halloysite nanotubes are heterogeneous because of multiple surface groups and different pore structures. The two forms of halloysite nanotube tested have the abundant potential for removal of phosphate from agriculture runoff. Additional investigations at the pilot scale are, however, required to draw definite conclusions. View Full-Text
Keywords: phosphate; halloysite nanotubes; adsorption; isotherm; kinetic phosphate; halloysite nanotubes; adsorption; isotherm; kinetic
Show Figures

Figure 1

MDPI and ACS Style

Saki, H.; Alemayehu, E.; Schomburg, J.; Lennartz, B. Halloysite Nanotubes as Adsorptive Material for Phosphate Removal from Aqueous Solution. Water 2019, 11, 203.

AMA Style

Saki H, Alemayehu E, Schomburg J, Lennartz B. Halloysite Nanotubes as Adsorptive Material for Phosphate Removal from Aqueous Solution. Water. 2019; 11(2):203.

Chicago/Turabian Style

Saki, Hermin; Alemayehu, Esayas; Schomburg, Joachim; Lennartz, Bernd. 2019. "Halloysite Nanotubes as Adsorptive Material for Phosphate Removal from Aqueous Solution" Water 11, no. 2: 203.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop