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ARS Home » Southeast Area » Auburn, Alabama » Soil Dynamics Research » Research » Publications at this Location » Publication #401788
Research Project: Sustaining Productivity and Ecosystem Services of Agricultural and Horticultural Systems in the Southeastern United States

Location: Soil Dynamics Research

Title: Phosphorus adsorption using chemical and metal chloride activated biochars: Isotherms, kinetics and mechanism study

Author
item BISWAS, B - Auburn University
item RAHMAN, T - Auburn University
item SAKHAKARMY, M - Auburn University
item JAHROMI, H - Auburn University
item BALTRUSAITIS, J - Lehigh University
item ADHIKARI, S - Auburn University
item Torbert, Henry - Allen

Submitted to: Bioresource Technology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/3/2023
Publication Date: 9/4/2023
Citation: Biswas, B., Rahman, T., Sakhakarmy, M., Jahromi, H., Baltrusaitis, J., Adhikari, S., Torbert Iii, H.A. 2023. Phosphorus adsorption using chemical and metal chloride activated biochars: Isotherms, kinetics and mechanism study. Bioresource Technology. 9(9):e19830. https://doi.org/10.1016/j.heliyon.2023.e19830.
DOI: https://doi.org/10.1016/j.heliyon.2023.e19830

Interpretive Summary: Efficient treatment to remove nutrients (especially Phosphorous) from wastewater is important for protecting the environment. Research was conducted on the preparation of highly efficient, low-cost, and eco-friendly adsorbent derived from bio-char and studied for phosphorus adsorption. The key factors influencing the P removal efficiency of activated bio-char were investigated. Maximum P adsorption percentage (100%) was obtained with 10 mg-P/L and ZnCl2 metal activated bio-char (BC-Zn) compared to the other activated bio-chars.

Technical Abstract: Efficient treatment of nutrient-rich wastewater is of paramount importance for protecting the ecosystem. In this work, we prepared highly efficient, low-cost, and eco-friendly adsorbent derived from bio-char. Prepared different types of bio-char adsorbent were employed for the phosphorus (P) adsorption. The key factors influencing the P removal efficiency of activated bio-char, such as the concentration, pH, dosage, temperature, adsorption time, and influence of co-existing ion type, were investigated. Maximum P adsorption percentage (100%) was obtained with 10 mg-P/L and ZnCl2 metal activated bio-char (BC-Zn) compared to the other activated bio-chars. Results show that increasing the P concentration from 5 to 200 mg-P/L, the phosphorus adsorption capacity increases from 0.13 to 10.4 mg-P/L. Isotherms and kinetic studies further show that the P adsorption follows the Langmuir and quasi-second-order kinetic models. Furthermore, P desorption has been studied at different time intervals to understand the P release rate after adsorption.