The partition of Be between soil and water

Chen Feng You, Typhoon Lee, Yuan Huei Li

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97 Citations (Scopus)

Abstract

An extensive and systematic investigation of Be partition between solid and water was carried out using laboratory batch experiments with radioactive 7Be tracer. We found that: (1) Be is strongly held by the solid particles in natural environments under neutral conditions; (2) man-made δ-MnO2 and in situ weathering products of andesite have the highest Kd (> 106) while most mud, silt and clay minerals have Kd on the order of 105; (3) Kd is high under neutral or alkaline conditions but decreases rapidly by four orders of magnitude between pH 6 and 2; (4) Kd decreases with increasing concentration of suspended particles; (5) dissolved organic matter in Taiwan Strait surface water does not seem to greatly affect the value of adsorption Kd; (6) adsorption of Be onto soil is a two-stage process and the second stage is ∼ 1000 times slower than the first; (7) the reaction of surface ion exchange seems to proceed at a faster rate in river water than in seawater, probably because of the high ionic strength of the latter; (8) the activation barrier of sorption reaction for Be seems to be ∼ 10 kcal.mol-1 for river mud; and (9) the adsorption of Be onto soil seems to be a reversible process.

Original languageEnglish
Pages (from-to)105-118
Number of pages14
JournalChemical Geology
Volume77
Issue number2
DOIs
Publication statusPublished - 1989 Oct 5

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

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