hrvatski

Praćenje kvalitete otpadnih voda industrije gnojiva upotrebom ionske kromatografije

Inorganic cations and anions are commonly monitored for environmental protection purposes in wastewater. The presence of nitrate in foods is mainly due to plants, taking nitrogen from the soil in this ionic form. The use of nitrogen containing fertilizers increases the nitrate concentration in the soil and therefore, the nitrate content in plants grown therein is above the normal level. That is why it is essential to develop analytical methods that allow the simultaneous determination of these compounds in fertilizer industry wastewater. The aim of this work is development of ion chromatographic method for monitoring of sodium, ammonium, potassium, magnesium, calcium, fluoride, chloride, nitrite, sulphate, nitrate and phosphate in fertilizer industry wastewater. Real samples were fertilizer industry wastewater TMG 1 and TMG 2 from Petrokemija d.d., Croatia, fertilizer factory: • TMG 1: fertilizer industry wastewater from following processes: production of NPK fertilizer 1, KAN fertilizer 1, nitric acid 1 and process water preparation 1. • TMG 2: fertilizer industry wastewater from following processes: production of NPK fertilizer 2, KAN fertilizer 2, nitric acid 2, sulphuric acid, phosphoric acid, ammonia, urea and process water preparation 2. Developed ion chromatographic method is compared to widely used methods for monitoring of fertilizer industry wastewater, namely: flame spectrometry, colorimetry, titrimetry, ion selective electrode determination, spectrophotometry, turbidimetry. By performing validation procedure and number of statistical tests it is shown that developed ion chromatographic method has superior performance characteristic.

otpadne vode; industrija gnojiva; ionska kromatografija

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