Phosphorus sorption potential of natural adsorbent materials from a Brazil semiarid region to control eutrophication

Abstract: Aim The aim of the present study was to evaluate potential soluble reactive phosphorus (SRP) sorption three natural P adsorbents (Luvisol, Planosol, and Scheelite tailing) from Brazil’s semiarid region. Methods adsorption tests were done under pH 8 conditions with Lanthanum-Modified Bentonite (LMB). effect humic substances on SRP also tested. For this, Luvisol Planosol incinerated reduce their components, new done. water evaluated. Results high at 8. Of adsorbents, achieved highest maximum capacity (Q) 17.5 mg g-1, followed by tailing (8.3 g-1) (7.7 g-1). tailing, LMB increased water. After treatment substances, showed a Q 22.3 g-1 while produced 11.1mg g-1. Reducing amount potentiated process in Planosol. However, isotherms untreated treated have not reached equilibrium therefore may be overestimated. Conclusions precipitation probably main mechanism, being more expressive than adsorption. most promising material for eutrophic environments because it is alkaline, calcium-rich, this will remain anoxic conditions. It has small organic matter and, consequently, contains less substances. quality clay important quantity process.