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Aims/Objectives: An agricultural tropical soil treated and untreated with swine manure was evaluated to Pb, Cu, Zn, and Ni competitive sorption dynamics. Study Design: Metal ion mobility patterns were evaluated by sorption-desorption reactions with the mineral and organic matter soil phases. *Corresponding author: E-mail: mjyabe@gmail.com; Ruiz et al.; IJPSS, 32(1): 29-40, 2020; Article no.IJPSS.54355 Place and Duration of Study: Agronomic Institute of Parana (IAPAR) at Londrina city, Parana State, Southern Brazil, in an experiment conducted since June 2008. Methodology: Soybean and corn were growing up in the experimental area in summer and winter, respectively. Swine manure (SM) was applied twice a year, and the amount was calculated according each crop necessity. Experiments were in batch, varying the metal ion concentration from 1.0 to 10 meq L−1. After equilibrium, the solid phase was analyzed by EDXRF and liquid phase by ICP-OES. Metal ion mobility was evaluated by applying the dual-mode LangmuirFreundlich mathematical model, in addition to rate removal and Gibb’s free energy determination. Results: Sorption capacity increased after the SM amendment, and the retention sequence Pb>Cu>Zn>Ni was observed. The sorption capacity increased in 30%, 45%, 176%, and 231% for Pb, Cu, Zn, and Ni, respectively. The relative intensity of the fluorescence emission lines showed metal ion sorption increased after the amendment, keeping the same sequence observed for the adjustable parameters from the fitting by dual-mode LangmuirFreundlich model. Conclusion: The possibility of a controlled release of micronutrients, considering low-affinity sorption sites, brings an excellent look to the swine manure amendment.

Effect of Swine Manure Amendment on Pb2+, Cu2+, Zn2+, and Ni2+ Competitive Sorption onto Agricultural Soil