Specific Adsorption of Heavy Metals in Soils: Individual and Competitive Experiments

• DOI: 10.3390/agronomy10081113
• Publication Date: 2020-08-03T07:16:46Z
• Authors: Claudia Campillo-...; Manuel Conde-Cid; Manuel Arias-Estévez; David Fernández-C...; Flora Alonso-Vega
• Keywords: Cation-exchange capacity

The partitioning between the soil solid phase and solution determines mobility of pollutants like heavy metals. If nonspecific sorption takes place, reactions are easily reversible metals released to increasing probability leaching through profile. Mobility also favoured if other in system competition for specific adsorption sites place. In this study, desorption equilibrium experiments were conducted after ones. was evaluated amounts still adsorbed Cu, Pb, Cr, Ni Zn ten different soils. addition, binary evaluating metal three Pb Cu retained higher all studied slightly neutral soils, Cr is lesser while acidic soils less retained. Results showed that despite high variable organic matter pH most important properties than play roles related cationic exchange capacity clay content. Instead, release during probably due more soluble fraction individual retention Zn, when they competition, except present. case, amount those four increased. Therefore, presence together with multi-metal polluted areas. Specific as affinities increase experiments.