Papers
ADSORPTION OF ZEARALENONE ON CLAY AND TREATED CLAY MATERIALS IN AQUEOUS SOLUTIONS
2020 年 24 巻 1 号 p. 23-30
詳細
2020 年 24 巻 1 号 p. 23-30
First, in order to find suitable evaluation factors of zearalenone (ZEA) adsorption ability of clay and treated clay materials, their specific surface area values obtained from nitrogen and water adsorption isotherms, SA(N2) and SA(H2O), and monolayer adsorption capacities of water and toluene obtained from each adsorption isotherms, Vm(H2O) and Vm(toluene), were measured together with their ZEA adsorption ability. However, any good relationships between the measured values and the ZEA adsorption ability were not recognized here. This result means that the mechanism of ZEA adsorption is complicated depend on the kind of clay. From the water and toluene adsorption isotherms of these adsorbents, the reason of the higher adsorption ability of clays such as magnesium silicate and talc adsorbents was clarified and a certain good relationship between the SA(H2O)/SA(N2) ratio and the ZEA adsorption ability was found for these adsorbents. Next, the acid treatment and heat treatment of the Japanese acid earth, JAE sample, were carried out to develop economically the effective adsorbent for ZEA in aqueous solutions. Consequently, the heat treatment of the JAE sample resulted a dramatic decrease in the values of Vm(H2O) and SA(H2O)/SA(N2) ratio, meaning the higher adsorption ability for ZEA. The ZEA adsorption ability of the HE-K sample heated at 773 K was the largest in all the clay adsorbents except the reference samples.
