Natrio dodecilsulfato kiekis nutekamuosiuose vandenyse, susidarantis plaukų plovimo metu
| Author | Affiliation | |
|---|---|---|
LT | ||
Jasulaitytė, Giedrė | Vilniaus Gedimino technikos universitetas | LT |
| Date |
|---|
2010 |
Tyrimai buvo atlikti plaunant plaukus natrio dodecilsulfatu 40°C ar 50°C temperaturoje. Naudota skirtingų koncentracijų, t. y. mažesnės nei kritinė micelių susidarymo koncentracija – 4×10–3 mol/l, 6×10–3 mol/l, kritinės – 8×10–3 mol/l ir didesnės nei kritinė – 10×10–3 mol/l koncentracijos tirpalai. Natrio dodecilsulfato kiekis, patenkantis į nutekamuosius vandenis arba adsorbuojamas ant plaukų paviršiaus, nustatytas liepsnos fotometrijos ir tiesioginės potenciometrijos metodais. Įvertinus gautuosius rezultatus matyti, kad daugiausiai natrio dodecilsulfato patenka į nutekamuosius vandenis, kai jo koncentracija didesnė nei kritinė micelių susidarymo koncentracija – 10×10–3 mol/l, mažiausiai – kai pradinė natrio dodecilsulfato tirpalo koncentracija 4×10–3 mol/l ir 6×10–3 mol/l. Plovimo tirpalų ir plaukų ištraukos pH matavimų duomenys siejasi su natrio dodecilsulfato koncentracijos kitimu plovimo tirpaluose. pH matavimų duomenys rodo, kad natrio dodecilsulfatas sąveikauja su plaukais.
The investigations were carried out while washing hair with sodium dodecylsulphate solutions of different concentrations i. e., lower than the critical concentration of micelle formation of 4×10–3, 6×10–3, the critical concentration of micelle formation of 8×10–3 and higher than the critical concentration of micelle formation of 10×10–3 mol/l in solutions at 40 °C or 50 °C. The amount of sodium dodecylsulphate that gets into waste water or adsorbs on the hair surface was determined using flame photometry and direct potentiometry methods. Having estimated the results obtained during the analysis of flame photometry and direct potentiometry it has been determined that the largest amount of sodium dodecylsulphate gets into waste water when its concentration is higher than the critical concentration of micelle formation of 10×10–3 mol/l. The results of the investigation of washing artificially tainted and non-tainted hair have demonstrated that the largest amount of sodium dodecylsulphate gets into the environment after hair washing with 10×10–3 mol initial concentration in solution of 6×10–3 and 8×10–3 mol/l. The results of pH measurements of washing and hair extract solution are in correlation with variation of amount of sodium dodecylsulphate in washing solutions. The measurements of pH show that sodium dodecylsulphate interacts with hair
| Journal | IF | AIF | AIF (min) | AIF (max) | Cat | AV | Year | Quartile |
|---|---|---|---|---|---|---|---|---|
Journal of Environmental Engineering and Landscape Management | 1.333 | 2.496 | 2.496 | 2.496 | 1 | 0.534 | 2010 | Q3 |
| Journal | IF | AIF | AIF (min) | AIF (max) | Cat | AV | Year | Quartile |
|---|---|---|---|---|---|---|---|---|
Journal of Environmental Engineering and Landscape Management | 1.333 | 2.496 | 2.496 | 2.496 | 1 | 0.534 | 2010 | Q3 |