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. Santrauka Tyrimai buvo atlikti plaunant plaukus natrio dodecilsulfatu 40 °C ar 50 °C temperatūroje. Naudota skirtingu koncentraciju, t. y. mažesnes nei kritine miceliu susidarymo koncentracija ‐ 4×10–3mol/l, 6×10−3mol/l, kritines ‐8×10–3mol/l ir didesnes nei kritine— 10×10–3 mol/l koncentracijos tirpalai. Natrio dodecilsulfato kiekis, patenkantis i nutekamuosius vandenis arba adsorbuojamas ant plauku paviršiaus, nustatytas liepsnos fotometrijos ir tiesiogines potencio‐metrijos metodais. Ivertinus gautuosius rezultatus matyti, kad daugiausiai natrio dodecilsulfato patenka i nutekamuosius vandenis, kai jo koncentracija didesne nei kritine miceliu susidarymo koncentracija ‐ 10× 10–3 mol/l, mažiausiai ‐ kai pradine natrio dodecilsulfato tirpalo koncentracija 4×10–3 mol/l ir 6×10–3 mol/l. Plovimo tirpalu ir plauku ištraukos pH matavimu duomenys siejasi su natrio dodecilsulfato koncentracijos kitimu plovimo tirpaluose. pH matavimu duomenys rodo, kad natrio dodecilsulfatas saveikauja su plaukais. Резюме Исследования были проведены при мытье волос растворами додецилсульфата натрия разной концентрации, т. е. меньше чем критическая мицеллообразования 4×10–3, 6×10–3 мол/л, критическая мицеллообразования 8× 10–3 мол/л и больше чем критическая мицеллообразования 10×10–3 мол/л при температуре 40 °C или 50 °C. Количество попадаемого в сливные воды или адсорбируемого додецилсульфата натрия было установлено методами пламенной фотометрии и прямой потенциометрии. Оценивая результаты, полученные методами плазменной фотометрии и прямой потенциометрии, видно, что наибольшее количество додецилсульфата натрия попадает в сливные воды, когда его концентрация больше чем критическая мицеллообразования 10×10–3 мол/л. Результаты искусственно загрязненных и незагрязненных мытых волос показали, что наибольшее количество додецилсульфата натрия попадает в окружающую среду, когда мытье проводится раствором 10×10–3 мол/л, а наименьшее количество, когда первичная концентрация раствора равна 4×10–3, 6×10–3 мол/л. Результаты измерения растворов рН и вода после мытья волос коррелируют с количественным изменением додецилсульфата натрия в растворах мойки. Измерение рН свидетельствует о том, что додецилсульфат натрия взаимодействует с волосами.

Zinc as a nutrition element is required to plants in small quantities to maintain normal functions of metabolism mechanisms. Our work analyses the efficiency of red clovers “Arimaičiai” for cleaning zinc from the soil contaminated with zinc under laboratory conditions. Seeds were sown in three differently polluted soils: clean soil, once contaminated with zinc and periodically contaminated with zinc soil. Zinc concentration in one time contaminated soil was 45 mg/kg. After 6 months of phytoremediation, the remained zinc concentration in the soil was 3 times lower comparing with the initial concentration. It was also determined that under such conditions, the uptake of red clovers made approximately 65% of zinc. Permanent soil contamination with zinc increased concentration before phytoremediation up to 80 mg/kg. After 6 months of phytoremediation, zinc concentration was determined to be 1.9 times lower. Otherwise, the soil was permanently contaminated with larger zinc quantities and after application of which reached 300 mg/kg. In this case, following half a year of phytoremediation, zinc concentration in the soil was 1.7 times lower comparing with the initial concentration after contamination. It was determined that the uptake of red clovers made approximately 17% of zinc.