TY - JOUR T1 - Cadmium Adsorption Equations in the Sediments of Karun River in Low-Water and High-Water Seasons (From Ahvaz to Khorramshahr) TT - معادلات جذبی کادمیوم در دو فصل کم‌آبی و پرآبی رسوبات رودخانه کارون (بازه اهواز تا خرمشهر) JF - JSTNAR JO - JSTNAR VL - 17 IS - 65 UR - http://jstnar.iut.ac.ir/article-1-1783-en.html Y1 - 2013 SP - 223 EP - 231 KW - Cadmium KW - Adsorption KW - Langmuir KW - Freundlich. N2 - The purpose of this study was to investigate cadmium adsorption through Freundlich and Langmuir equations in sediments of Karun River in three hydrometric stations (5th Ahvaz Bridge, Darkhovin and Khorramshahr) in the low-water and high-water seasons. Fitting of data from experiments on cadmium absorption to Freundlich and Langmuir equation showed they are compatible. According to the conducted experiments, there was a significant difference at 0.01 levels between b coefficient of Langmuir equation with the organic matter percentage and the clay content in both Low and high water seasons, while there was no significant difference between k coefficient of Langmuir equation with the organic matter percentage and the clay content for the two seasons. The results also suggested that there is a significant relationship between Kf of Freundlich equation with the organic matter percentage and clay content, at significant levels of 0.05 and 0.01 for the organic matter percentage and the clay content, respectively. Comparison of the means of low and high water seasons revealed that there is no significant relationship between Langmuir coefficients, whereas in Freundlich equation, a significant difference at 0.01 level was observed between kf coefficients. Generally, the obtained results indicated that cadmium adsorption by sediments in low-water season is higher than high-water season. Also, cadmium adsorption by the 5th Ahvaz Bridge sediments due to the sandy texture was less than those adsorbed by both Darkhovin and Khorramshahr sediments. M3 ER -