Konkurentno uklanjanje teških metala iz binarne otopine

The removal of copper and cobalt ions from binary metal solutions on zeolite NaX by ion exchange process was investigated. Experiments were conducted in unbaffled glass reactor with a Rushton turbine as a stirrer. The dependence of ion exchange kinetics and the amount exchanged were tested using different initial concentrations of metal ions in mixtures. The results obtained indicate that the removal efficiency depends on the initial heavy metal concentrations in binary solutions. Experimental kinetics data were analysed using Ritchie and Weber-Morris models. According to AARD values, the rate in this study was reaction-controlled. This work is licensed under a Creative Commons Attribution 4.0 International License.Ispitano je uklanjanje iona bakra i kobalta iz binarnih otopina metala ionskom izmjenom na zeolitu NaX. Eksperimenti su provedeni u staklenom kotlastom reaktoru bez razbijala virova. Kao miješalo upotrijebljena je Rushtonova turbina. Ovisnost kinetike izmjene iona i izmijenjene količine iona metala ispitana je pri različitim početnim koncentracijama iona metala u smjesama. Prema dobivenim rezultatima, učinkovitost uklanjanja iona metala iz otopina ovisi o početnim koncentracijama metala u binarnim otopinama. Kinetički podatci dobiveni eksperimentom analizirani su Ritchievim i Weber-Morrisovim modelom. Prema vrijednostima AARD-a, ukupna brzina procesa u ovoj studiji kontrolirana je reakcijom. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna

The Garden Candytuft (Iberis umbellata L.): At the Crossroad of Copper Accumulation and Glucosinolates

The copper accumulation ability and its impact on the glucosinolate content of the garden candytuft were studied. Different copper sources (adsorbents or solution) were used. Generally, the seedlings copper uptake from the adsorbents was in the amount needed for its growth and development with the beneficial or no impact on the glucosinolate content. The lowest copper concentration was detected in the total seedlings biomass which grew in the humus with the addition of Cu-exchanged zeolite NaX (27.88 μg g−1 DW) having glucosinolate content of 9757.81 µg g−1 DW (23.86 µmol g−1 DW). The highest copper concentration among all the garden candytuft samples was detected in the seedlings watered with CuSO4∙5H2O solution (514.63 μg g−1 DW) with a sharp decrease of the glucosinolate content 3103.33 µg g−1 DW (7.59 µmol g−1 DW). Based on the results obtained, the garden candytuft can be considered as a copper accumulator plant

With food to health : proceedings of 11th International symposium

Proceedings contains 13 original scientific papers, 10 professional papers and 2 review papers which were presented at "10th International Scientific and Professional Conference WITH FOOD TO HEALTH", organised in following sections: Nutrition, Dietetics and diet therapy, Functional food and food supplemnents, Food safety, Food analysis, Production of safe food and food with added nutritional value

Rocket (Eruca vesicaria (L.) Cav.) vs. Copper: The Dose Makes the Poison?

The effects of copper addition, from various adsorbents, on the accumulation ability and glucosinolate content of cultivated rocket were studied. Different adsorbents (zeolite NaX, egg shells, substrate, fly ash) were treated with copper(II) solution with an adsorption efficiency of 98.36, 96.67, 51.82 and 39.13%, respectively. The lowest copper content and the highest total glucosinolate content (44.37 μg/g DW and 4269.31 µg/g DW, respectively) were detected in the rocket grown in the substrate with the addition of a substrate spiked with copper(II) ions. Rocket grown in the fly ash-substrate mixture showed an increase in copper content (84.98 μg/g DW) and the lowest total glucosinolate content (2545.71 µg/g DW). On the other hand, when using the egg shells-substrate mixture, the rocket copper content increased (113.34 μg/g DW) along with the total GSLs content (3780.03 µg/g DW), indicating the influence of an adsorbent type in addition to the copper uptake. The highest copper content of 498.56 μg/g DW was detected in the rocket watered with copper(II) solution with a notable decrease in the glucosinolate content, i.e., 2699.29 µg/g DW. According to these results rocket can be considered as a copper accumulator plant

Priprava tekućeg organskog gnojiva fermentacijom koprive (Urtica dioica L.) i kamilice (Chamomilla recutita L. Rauschert)

U ovom radu provedena je priprava tekućeg organskog gnojiva tijekom 17 dana kroz dvije serije uzoraka. Za fermentaciju su upotrijebljeni suhi mljeveni korijen koprive i suhi cvjetovi kamilice. Uzorci su pripremljeni otapanjem 20 g suhog bilja u 1 l vode i to u dvije serije: otapanjem u tehnološki pripremljenoj demineraliziranoj vodi s pH = 7 i σ = 0,83 μS cm−1 i u vodi odstajaloj 48 h na sobnoj temperaturi s pH = 7,18 i σ = 374 μS cm−1. Tijekom fermentacije provedene u temperaturnom rasponu okoline 4 – 15 °C, ispitivane su promjene pH vrijednosti, ukupne otopljene tvari (otopljenih soli), kao i električne vodljivosti uzoraka. Dobiveni rezultati pokazuju promjenu pH vrijednosti kod fermentacije uzoraka u odstajaloj vodi čije su vrijednosti blizu optimalnim vrijednostima (5,00 – 5,50) potrebnim za primjenu tekućeg organskog gnojiva. Uočava se i oslobađanje veće količine ukupne otopljene tvari u takvim uzorcima, a izmjerene su i više vrijednosti električne vodljivosti

Preparation of Liquid Organic Fertilizer by Fermentation of Nettle (Urtica dioica L.) and Chamomile (Chamomilla recutita L. Rauschert)

U ovom radu provedena je priprava tekućeg organskog gnojiva tijekom 17 dana kroz dvije serije uzoraka. Za fermentaciju su upotrijebljeni suhi mljeveni korijen koprive i suhi cvjetovi kamilice. Uzorci su pripremljeni otapanjem 20 g suhog bilja u 1 l vode i to u dvije serije: otapanjem u tehnološki pripremljenoj demineraliziranoj vodi s pH = 7 i σ = 0,83 μS cm–1 i u vodi odstajaloj 48 h na sobnoj temperaturi s pH = 7,18 i σ = 374 μS cm–1. Tijekom fermentacije provedene u temperaturnom rasponu okoline 4 – 15 °C, ispitivane su promjene pH vrijednosti, ukupne otopljene tvari (otopljenih soli), kao i električne vodljivosti uzoraka. Dobiveni rezultati pokazuju promjenu pH vrijednosti kod fermentacije uzoraka u odstajaloj vodi čije su vrijednosti blizu optimalnim vrijednostima (5,00 – 5,50) potrebnim za primjenu tekućeg organskog gnojiva. Uočava se i oslobađanje veće količine ukupne otopljene tvari u takvim uzorcima, a izmjerene su i više vrijednosti električne vodljivosti. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna.In this experiment, the preparation of liquid organic fertilizer was performed for 17 days through two series of samples. For the fermentation process, dry nettle root and dry camomile flowers were used. The samples were prepared by dissolving 20 g of dry plants in 1 l of water, in two series: in technologically prepared demineralised water with pH = 7 and σ = 0.83 μS cm–1 and tap water (left 48 h at room temperature) with pH = 7.18 and σ = 374 μS cm–1. During the 17-day fermentation in the temperature range of 4–15 °C, changes in pH, concentration of total dissolved solids and electrical conductivity of the samples were measured. The results show a change in pH values of the fermented samples in distilled water, the values of which are close to optimal values (5.00–5.50) required for the application of liquid organic fertilizers. The release of a larger amount of total dissolved solids in such samples was also observed and higher values of electrical conductivity were measured. This work is licensed under a Creative Commons Attribution 4.0 International License

Comparison of Non-Linear and Linear Ho Models Applied for Copper Ions Sorption on Geopolymer

The Ho pseudo-second-order model is the best fitting model in describing the sorption of copper ions on synthesized geopolymer for the selected experimental conditions (particle size 0.071–0.090 mm at agitation speed of 240 rpm). For that reason, a comparison of one non-linear and five linear forms of the Ho pseudo-second-order model was made in the present study in order to obtain the optimum sorption kinetic parameters using the experimental kinetic data obtained for the copper ions sorption process on the synthesized geopolymer. Taking all the results into consideration, the non-linear Ho model proved to be more consistent in describing the copper ions sorption on geopolymer for various initial concentrations of sorbent, as well as for various temperatures