Studies on maximum phosphorus adsorption capacity (MPAC) in soils from Roraima State and attributes that interfere with the magnitude of this characteristic are relevant and motivated this study. . P was analyzed in the supernatant for determining its adsorbed amount (P-rem). Adsorption values were fitted to the Langmuir isotherm in order to assess MPAC. Correlation tests were performed between MPAC and binding energy, pH, organic matter, clay, and CEC. MPAC values ranged from 14.50 to 527.93 mg kg −1 in the soil. The soils FT-Bonfim and LV-ITÃ presented a higher MPAC. Considering the representative soil classes in the State, MPAC does not correlate with any of the assessed attributes. In the soil classes Oxisol and Ultisol, MPAC has a negative and significant correlation with binding energy. Key words: Maximum phosphorus adsorption capacity. Correlation. Langmuir isotherm. ResumoEstudos sobre capacidade máxima de adsorção de fósforo (CMAP) em solos de Roraima e atributos que interferem na magnitude dessa característica são relevantes e motivaram esse trabalho. Nesse contexto, amostras da camada superficial (0-0,20 m) de quatro classes de solos: Latossolo Amarelo -LA e Latossolo Vermelho -LV (ITÃ, Caracaraí); Latossolo Amarelo -LA (Serra da Prata, Mucajaí); Latossolo Amarelo -LA e Argissolo Amarelo -PA (CCA, Boa Vista-RR); Plintossolo Argilúvico -FT (Bonfim) e Planossolo Nátrico -SN (Surumu, Pacaraima) representativos do estado de Roraima, foram utilizadas no presente trabalho, com a finalidade de determinar a influência de atributos físicos, químicos e da mineralogia dos solos sobre a CMAP. Amostras de 2,5 g de TFSA (terra fina seca ao ar) foram mantidas em contato com soluções de CaCl 2 0,01 mol L -1 (25 mL), mediante agitação por 24 h, as quais foram adicionados fósforo (P), na forma de KH 2 PO 4 , nas concentrações de 0-60, 0-80 e 0-110 mg L -1 . O P foi analisado no sobrenadante para a determinação da quantidade adsorvida (P-rem). Para avaliar a capacidade máxima de adsorção de fósforo (CMAP), os valores de adsorção foram ajustados à isoterma de Langmuir. Foram realizados testes de correlação entre CMAP e energia de ligação, pH,
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.