<報文>塩化水銀(II)水溶液における種々の粒子の吸・脱着特性

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Adsorption behavior of mercury chloride (Ⅱ) on various particles was studied by using HgCl₂ in an aqueous solution at 25℃. The adsorptive ability of various particles with HgCl₂ was discussed in terms of instability partition coefficient, KINS, which is defined by the following equation. KINS=(ppm of HgCl₂ in a solution)/(ppm of HgCl₂ in an adsorbent). The reciprocal of KINS shows a degree to which HgCl₂ would be adsorbed. In order to investigate sorption characteristics of HgCl₂ on various particles, the break through-curve and desorption curve of them were also examined. The following results were obtained: 1) KINS found at 25℃ in initial HgCl₂ conentration of 500ppb, in decreasing order was subsurface soil > Kanto loam > river sediment (B) > river sediment (A) >river sand. 2) It was estimated that the main adsorption sites for HgCl₂ in cases of subsurface soil and river sediments were organic substances and in Kanto loam were inorganic ones. 3) The break points with river sand, Kanto loam and subsurface soil were 0-0.05, 1 and 30l respectively. 4) The desorption of HgCl₂ from river sand was the easiest of all various particles, while the HgCl₂ desorption from subsurface soil was not readily occured.
横浜国立大学の論文