河口硅酸盐物理化学过程研究——Ⅱ 河口活性硅转移机理的实验室模拟研究—氢氧化铁与氢氧化铝胶体沉淀对海水中活性硅的吸附
PHYSICO-CHEMICAL PROCESSES OF SILICATES IN THE ESTUARIAL REGION——Ⅱ. Laboratory Model Studies on the Mechanism of the Silicate Removal in the Estuarial Region-The Adsorption of Reactive Silicate in Sea Water on Colloidal Fe(OH)3 and Al(OH)3 Preci
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摘要: 河口活性硅酸盐除了被稀释和被吸收外,有没有进行明显的无机化学转移?一直到最近几年,仍然是国际上争论的问题[1-6]。我们已在本研究第Ⅰ篇[1]报导了河口活性硅含量分布;河水与无硅海水人工混合后活性硅含量变化;电解质浓度和pH值对硅酸盐溶液中活性硅含量的影响以及吸附剂影响的初步实验;证实了河水和海水混合后活性硅含量的变化主要决定于悬浮物、电解质、pH值三个因素的同时作用。Abstract: The adsorption of reactive silicate in sea water on colloidal Fe(OH)3 and Al(OH)3 precipitates has been studied quantitatively in the laboratory in order to find out the extent of the adsorption under conditions similar to those occur in natural environments,the type of adsorption process,and also the more acceptable mechanism of the silicate removal in the estuarial region.Adsorption isotherms under different Cl‰,pH,and composition of electrolytes have been obtained and isosteric heats of adsorption have been calculated.Desorption experiments have been done by washing the adsorption residues with NaCl,Na2SO4,MgCl2 or NaOH solution.Some residues were re-dissolved by 0.02 N HC1 to determine the form of the adsorbed silicate.
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李法西、吴瑜端、王隆发、陈泽夏、1964.河口硅酸盐物理化学过程研究.1.活性硅含量分布变化及其影响因素的初步探讨.海洋与湖沼6:311-322. Bien,G.S.,D.E.Contois and W.H.Thomas,1958.The Removal of Soluble Silica from Fresh Water Enatering the Sea,Geochim.Cosmchim.Acta,14:35-54. Boyle.E.,R.Collier,A.T.DenBler,J.,M.Edmond.A.C.Ng and R.F.Stallard,1974.On the Chemical Mass Baleace in Estuarines,Geochim.Cosmochim.Acta,38:1719-1728. Fsaaing.K.A,and M.E.Q.Pilson.1973.The Lack of Inorganic Removal of Dissolved Silica Duriag River-ocean Mixiag.Geochim.Cosmochim.Acta,37:2405-2415. Liss.P.S.and C.P.Spencer,1970.Abiological Processes in the Removal of Silicate from Sea Water,Geochim.Cosmochim.Acta,34:1073-1088. Liss.P.S.and M.J.Pointoa.1973.Removal of Dissolved Boron and Silicon During Estuarine Mixiag of Sea aad River Waters,Geochim.Cosmochim.Acta.37:1493-1498. Okamoto.G,T.Okara and K.Goto,1957.Properties ef Silica is Water,Geochim.Cosmochim.Acta.12:123-132. -
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