A Comparison of Methods for the Determination of Cation Exchange Capacity of Soils/Porównanie Metod Oznaczania Pojemności Wymiany Kationów I Sumy Kationów Wymiennych W Glebach

Abstract

Abstract:The object of this study was to compare the results obtained with four methods of determination of cation exchange capacity (CEC) and sum of exchangeable cations (Ca, Mg, K) in soils. One of these methods is Kappen's method and the others methods are based on different extracting reagents: sodium acetate (pH = 8.2), barium chloride and hexaamminecobalt(III) chloride. Values measured with barium ions and hexaamminecobalt(III) ions as index cations are very comparable and these two methods can be considered as equivalent. Kappen's method gives overestimated results, especially for acid soils reach in organic matter and very calcareous soils. Sodium acetate, buffering the pH of the extracting solution, causes increase of numbers of negatively charged sites and particularly those bonded to organic matter and for this reason values obtained with this method are overestimated. Nevertheless, it is possible to correct this error for a given soil sample by regression equation considering pH of soil, clay and organic carbon content.

Separation and characterisation of montmorillonite from a low‐grade natural bentonite: using a non‐destructive method

“…The dried NB and purified bentonite clay powders (P1, P2 and P3) were characterised for CEC by using Bower (ammonium acetate) method [32, 33]. Therefore, the flame photometer device (360, Sherwood) was used to measure exchangeable cations.…”

Elucidation of microbial diversity and lignocellulolytic enzymes for the degradation of lignocellulosic biomass in the forest soils of Eastern and Western Ghats of Tamil Nadu, India

“…22 Deionized water was added to the soil samples and levels of water-soluble cations (Ca 2+ , Mg 2+ , K + ) were estimated from the filtrate collected after 19 h of shaking. 23 Organic carbon present in the soil samples was estimated by the chromic acid wet digestion method. 24 Available nitrogen in the samples was determined after acid digestion by the micro-Kjeldahl method, 25 and available phosphorus in the soil samples was also estimated.…”

Immobilization of lead in shooting range soil using biochar from spent mushroomsubstrateImmobilization of lead in shooting range soil using biochar from spent mushroomsubstrate

“…Soil particle distribution was determined with the hydrometer method [14]. The cation exchange capacity (CEC) for shooting range soil and SMSB was determined using USEPA Method [15]. Soil organic matter (SOM) was determined using the loss-on-ignition (LOI) method [16], and the soil organic carbon (SOC) was calculated using Equation 2 (3) where [metal] is the concentration of metal ion in digested solution, V is the volume of digested solution and m soil is the mass of soil sample (kg).…”