engleski

Importance of Heavy Metals Monitoring in Textile Processing Waters

Approximately 1 % of the cellulose textile material is being ruined during the bleaching process due to a high content of heavy metals present. Metal ions, if present in higher amounts, can be responsible for the loss of peroxide and can cause pin holing due to the excessive rate of local decomposition of peroxide. Heavy metals are often present in different textile processes. The reasons for their presence can be contamination of textile raw materials, as well as chemical means and dyes applied in the chemical treatment processes. Cobalt, chromium and occasionally copper and nickel form part of the most commonly used dyes where the metal part can be 3 % to 4 %. Cobalt and chromium dyes are applied particularly in dyes for nylon and wool. Copper salts are used to fix direct dyes and to enhance the light fastness on the nylon while antimony improves wash fastness properties on nylon fibers. Cationic dyes contain zinc as well as trace concentrations of mercury, cadmium and arsenic as impurities from intermediates. Monitoring of heavy metals in raw cotton, processed textile materials, and in process waters has to be performed in order to reduce the heavy metal content. The aim of this research work will be to monitor the heavy metal content in the input and output of textile processing waters for the textile processing control, as well as for the ecological reasons. The aim of the study will be to determine the cause of cotton degradation that occurred in one percentage of all treated materials during bleaching treatment and to quantify the possible effects of heavy metals present on textile production and the environment. This will have a positive influence on the textile industry, the environment and the human health.

metals; textile processing waters

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