The partition of Be between soil and water

Chen Feng You, Typhoon Lee, Yuan Huei Li

研究成果: Article同行評審

101 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)105-118
頁數14
期刊Chemical Geology
77
發行號2
DOIs
出版狀態Published - 1989 十月 5

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

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