Análise de íons cloreto, capturados por velas úmidas, da atmosfera da cidade de Parnaíba empregando o método de Mohr

Abstract

Due to the incidence of pathological manifestations in the area of civil engineering, this work sought to scientifically guide the discussions on the action of chlorides in the constructions, since they come from the marine aerosol and cause damage to reinforced concrete structures. There are studies on the deter-mination of chloride ions using a humid candle, which was specifically built for the capture of chloride ions, and these have already been published in scientific journals. However, there are still no reports of this type of study in the cities of Parnaíba and Luís Correia, and this was the stimulus for this work. The objective of the work was to map the wet sails, capture the chloride ions and determine their concentration using Mohr's me- thod. The wet candles were then built with low cost material, and these were strategi- cally placed in three points for the collection of chlorides from the air. It was found that the collection point located on the pedra do sal beach where the highest concen- tration of chloride ions was determined, which was already expected, being close to the sea. The other two points, located in the city of Parnaíba, showed close results and a lower concentration of chlorine ions when compared to the result measured at the beach. In view of the experimental results obtained, the good performance in the capture of chloride ions can be verified, as well as its presence by a classical analyti- cal methodology