Research Article

Maximum Phosphate Adsorption Capacity as Influenced by Some Biochar Properties

Abdu N1*, Solomon Rejoice Ibrahim2, Yusuf, A. A3, Bello M.4
1 Ahmadu Bello University Zaria, Faculty of Agriculture, Department of Soil Science
2 Modibbo Adama University of Technology, Yola, Nigeria
3 Department of Soil Science, Faculty Agriculture/Institute for Agricultural Research, Ahmadu Bello University, P.M.B 1044 Zaria, Nigeria.
4 Ahmadu Bello University Zaria, Faculty of Engineering, Department of Chemical Engineering
* Corresponding author: abdun@soilsjournalnigeria.com
Published: Apr, 2021
Pages: 93-99
Views: 444
Downloads: 741

Abstract

The use of biochar as a low-cost adsorbent to remove nutrients from aqueous solutions is getting great attention lately due to its many environmental applica- tions and benefits. Although biochar has been widely used to remove phosphate from aqueous solutions, inconsistencies still exist with regards to biochar proper- ties responsible for the adsorption process. This research was therefore, carried out to determine the influence of some biochar properties on the maximum phos- phate adsorption capacity of biochar produced from four different feed-stocks. The biochars used for this study were prepared from two plant materials, (Maize cob and rice husk) and two animal wastes (cow dung and poultry litter) at 600 ° C. The different biochars were subjected to a laboratory batch sorption experi- ment. Data obtained were fitted into the linear forms of the Langmuir, Freun- dlich, Temkin, and Dubinin-Radushkevich (D-R) adsorption isotherms while least square regression analysis was used to test the goodness of fit using the co- efficient of determination (R2)., stepwise regression analysis was carried out to determine the nature and extent of relationships between the biochar properties and maximum phosphate adsorption capacity using statistical analysis software (SAS 9.4). Results revealed higher R2 values for the D-R adsorption isotherm (> 0.97) across all the treatments suggest a better fit of the D-R adsorption isotherm for phosphate adsorption onto the biochar materials. The maximum phosphate adsorption capacity of the biochar materials is in the order: maize cob biochar > poultry litter biochar > cow dung biochar > rice husk biochar. Stepwise regres- sion analysis revealed that 99 % of the change in maximum phosphate adsorption is influenced by the combined effects of biochar EC, moisture content and specif- ic surface area. Hence, modification of biochar EC, moisture content, and specif- ic surface area is essential for improving phosphate adsorption by biochar

Keywords

Biochar properties Adsorption capacity Phosphate adsorption

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How to Cite

N, A., Ibrahim, S. R., A, Y. A., & M., B. (2021). Maximum Phosphate Adsorption Capacity as Influenced by Some Biochar Properties. Nigerian Journal of Soil Science, 31(1), 93-99.

A. N, S. R. Ibrahim, Y. A. A, and B. M., "Maximum Phosphate Adsorption Capacity as Influenced by Some Biochar Properties," Nigerian Journal of Soil Science, vol. 31, no. 1, pp. 93-99, April 2021.

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