naa a22 4500 510752241 CHVBK 20180411083108.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-012-1418-8 doi (NATIONALLICENCE)springer-10.1007/s11270-012-1418-8 Sorption of Cadmium in Some Soil Amendments for In Situ Recovery of Contaminated Soils [Elektronische Daten] [M. Carrillo Zenteno, R. de Freitas, R. Fernandes, M. Fontes, C. Jordão] Although Cd concentrations in uncontaminated soils are usually low, pollution of soils by Cd from different sources of contamination pose problems. The application of soil amendments to increase plant production has been used as a viable alternative for recovery of soils contaminated with Cd. However, emphasis needs to be placed on the nature of Cd sorption processes in order that the amendments can be managed appropriately. A range of materials including vermicompost, sugarcane filter cake, palm kernel pie, lime, phosphate rock, and zeolite were used for the sorption studies. Total and nonspecific Cd sorption was estimated by batch experiments, and specific sorption was obtained by the difference between the former and the latter. Best adsorbents for specific Cd sorption from soil amendments were lime and zeolite. Langmuir adsorption isotherms fitted reasonably well in the experimental data, and their constants were evaluated, with R 2 values from 0.80 to 0.99. The maximum adsorption capacity of Cd(II) was higher for mineral amendments than for organic amendments and ranged from 0.89 to 10.86g kg−1. The small value (0.08L mg−1) of the constant related to the energy of adsorption indicated that Cd was bound weakly to the palm kernel pie. Thermodynamic parameter, the Gibbs free energy, was calculated for each system, and the negative values obtained confirm that the adsorption processes were spontaneous. The values of separation factor, R L, which has been used to predict affinity between adsorbate and adsorbent were between 0 and 1, indicating that sorption was very favorable for Cd(II). Springer Science+Business Media Dordrecht, 2013 Soil amendment nationallicence Lime nationallicence Zeolite nationallicence Sugarcane filter cake nationallicence Cd sorption nationallicence Gibbs free energy nationallicence Carrillo Zenteno M. Instituto Nacional Autónomo de Investigaciones Agropecuarias (INIAP), Km 26 vía Durán - Tambo, Guayaquil, Guaias, Ecuador aut de Freitas R. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Fernandes R. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Fontes M. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Jordão C. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-9 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1418-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1418-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Carrillo Zenteno M. Instituto Nacional Autónomo de Investigaciones Agropecuarias (INIAP), Km 26 vía Durán - Tambo, Guayaquil, Guaias, Ecuador aut NATIONALLICENCE 700 1- de Freitas R. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Fernandes R. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Fontes M. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Jordão C. Departamento de Solos, Universidade Federal de Viçosa, 36570-000, Viçosa, Minas Gerais, Brazil aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-9 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer