Carter, R. C. and Wilde, P., 1972. Cation exchange capacity of suspended material from coastal sea water off central California. Mar. Geol., 13: 107-122. The cation exchange capacity (CEC) of suspended particles (> 0.5 ~) in sea water is measured by a described methylene blue (MB) absorption method which has the following characteristics: sample volume: minimum of 100 ml sea water; time of meas...

this article presents the method of extraction-preconcentration of lead, cadmium, and nickel ions from food samples using the ghezeljeh montmorillonite nanoclay (geleh-sar-shoor) as a new native adsorbent in batch single component systems. the extraction-preconcentration of heavy metals were carried out by applying the solid phase extraction (spe) method followed by atomic absorption spectrosco...

Soybean is currently the most cultivated oilseed in world. The objective of this study was to analyze chemical attributes Oxisol correlated with soybean productivity. evaluated were grain productivity, soil properties organic matter contents, phosphorous, pH, potassium, calcium, magnesium, hydrogen + aluminum, sum bases, cation exchange capacity (CEC), base saturation, liming requirement; penet...

The soil exchange complex consists of colloidal materials on which ion exchange phenomena occur allowing it to attract, retain, and exchange elements that have opposite electric charges. Since their mineral constituents (clay) and organic components (humus) are mainly of a negative nature retained or exchanged ion are predominantly cations. Historically, failing to monitor parameters like the e...

The use of mineral soil analysis procedures in peat soils is considered unsuitable. Peat vulnerable to disturbance, which leads the damage inert structure, such as sifting and drying process. objective this study was obtain proper methods preparation extraction be used that can reflect conditions on field. experiment carried out laboratory Soil Science Department UGM by using samples taken from...

data mining enables generalization of data of soil to remote areas and which is able to up/down scale of data in wide ranges of level that facilitate the decision-making process of executives. cation exchange capacity (cec) is one of the most important parameters in soil database and shows the ability of a soil to retention of minerals and pollutants. due to low organic matter and specific mine...

the control of biological, hydrological and geochemical cycles of soil is the key part of the earth system. the objective of this research was to evaluate changes in soil chemical properties due to deforestation occurred in the gazafolya village, merek watershed, kermanshah province, iran. toward this attempt, 35 soil samples were collected from top soil layer using auger in early june, 2013. s...