Modeling of ion adsorption on soil constituents
土壤成分离子吸附模拟
基本信息
- 批准号:05680438
- 负责人:
- 金额:$ 1.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1993
- 资助国家:日本
- 起止时间:1993 至 1994
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Modeling was made of ion adsorption on metal oxides which are common in soils and sediments and affect the migration of ions in environments. 1. Ion exchange on metal oxide surfaces : with increasing pH the cation adsorption increases, while the anion adsorption decreases, showing a deviation from the mass-action law. The following two assumptions were made to develop an equilibrium model : (1) formation of surface complexes by exchanging hydrogen ions of surface hydroxyl groups with cations and hydroxide ions with anions, and (2) suppression of adsorption due to lateral interaction between adsorbed ions. With increasing electronegativity of the oxide lattice metal ions, the cation exchange (acid dissociation) increases while the anion exchange (base dissociation) decreases. This indicates that the electron density of surface hydroxyl groups is low with large electronegativity, favoring proton release while disfavoring proton uptake (hydroxide ion release). 2. Selective incorporation o … More f lithium ions into the lattice vacancy of spinel type manganese oxide : the incorporation velocity increases with the lithium ion concentration tending toward limiting values, while it increases exponentially with pH.A kinetic model was developed by considering two elementary reactions : (1) the lattice Mn(IV) ion oxidizes a hydroxide ion and excites a vacancy with a backward reaction, and (2) the excited vacancy takes up a lithium ion. 3. Incorporation of multivalent heavy metal ions into manganese dioxide particles : the amount of incorporation during the deposition of manganese dioxide by electrolytic oxidation of manganese (II) ions is proportional to the concentration of ions in solution and is higher for ions with higher adsorption affinities. This suggests a model in which manganese dioxide incorporates ions from the solution through adsorption on its new growing surface. All these models reproduce the observed results well and enable a prediction of the extent of ion adsorption and an evaluation of the ion adsorption properties of metal oxides. The models developed here can also be applied to ion adsorption on other components, clay minerals, humic substances, and so on. Less
模拟了土壤和沉积物中常见的影响离子迁移的金属氧化物对离子的吸附。1.金属氧化物表面的离子交换:随着pH值的增加,阳离子吸附增加,而阴离子吸附减少,显示出偏离质量作用定律。提出了以下两个假设来建立平衡模型:(1)通过将表面羟基的氢离子与阳离子交换以及氢氧根离子与阴离子交换形成表面络合物,以及(2)由于吸附离子之间的横向相互作用而抑制吸附。随着氧化物晶格金属离子电负性的增加,阳离子交换(酸解离)增加,而阴离子交换(碱解离)减少。这表明表面羟基的电子密度低,电负性大,有利于质子释放,而不利于质子吸收(氢氧离子释放)。2.选择性掺入O ...更多信息 f锂离子进入尖晶石型锰氧化物的晶格空位:掺入速率随锂离子浓度的增加而增加,趋于极限值,随pH值的增加而呈指数增加。(1)晶格Mn(IV)离子氧化氢氧根离子并通过逆反应激发空位,以及(2)激发的空位吸收锂离子。3.将多价重金属离子掺入二氧化锰颗粒中:通过电解氧化锰(II)离子沉积二氧化锰过程中的掺入量与溶液中离子的浓度成正比,并且对于具有较高吸附亲和力的离子更高。这表明了一个模型,其中二氧化锰通过吸附在其新的生长表面上来结合溶液中的离子。所有这些模型再现了观察到的结果,以及使预测的离子吸附的程度和金属氧化物的离子吸附性能的评价。这里开发的模型也可以应用于其他成分、粘土矿物、腐殖物质等的离子吸附。Less
项目成果
期刊论文数量(38)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
田村紘基,大喜多鋼治,古市隆三郎: "酸化鉄(III)粒子表面への二価重金属イオン吸着反応のモデル化" 分析化学. 43. 831-836 (1994)
Hiroki Tamura、Koji Okita、Ryuzaburo Furuichi:“二价重金属离子在氧化铁 (III) 颗粒表面的吸附反应的模拟” 分析化学 43. 831-836 (1994)。
- DOI:
- 发表时间:
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- 影响因子:0
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日本分析化学会北海道支部・東北支部共編分担執筆: "分析化学反応の基礎改訂版" 培風館, 193 (1994)
日本分析化学学会北海道分会和东北分会共同编着:《分析化学反应的基本修订版》百风馆,193(1994)
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- 影响因子:0
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片山則昭,田村清一,田村紘基,古市隆三郎: "二酸化マンガン粒子表面へのコバルト(II)イオン交換吸着反応のモデリング" 電気化学. 62. 251-256 (1994)
Noriaki Katayama、Seiichi Tamura、Hiroki Tamura、Ryuzaburo Furuichi:“二氧化锰颗粒表面钴 (II) 离子交换吸附反应的建模”电化学 62. 251-256 (1994)。
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- 发表时间:
- 期刊:
- 影响因子:0
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H.Tamura, K.Okita, N.Katayama, and R.Furuichi: "Modeling of divalent heavy metal ion adsorption on the surface of ion(III) oxide particles." Bunseki Kagaku. Vol.43. 831-836 (1994)
H.Tamura、K.Okita、N.Katayama 和 R.Furuichi:“离子 (III) 氧化物颗粒表面二价重金属离子吸附的建模。”
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- 影响因子:0
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H.Tamura,K.Ishizeki,M.Nagayama,R.Furuichi: "Incorporation of impurity metal ions in electrolytic manganese dioxide." J. Electrochem. Soc.141. 2035-2040 (1994)
H.Tamura、K.Ishizeki、M.Nagayama、R.Furuichi:“电解二氧化锰中杂质金属离子的掺入”。
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- 影响因子:0
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TAMURA Hiroki其他文献
TAMURA Hiroki的其他文献
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{{ truncateString('TAMURA Hiroki', 18)}}的其他基金
Study of the Removal of Aquatic Organic Pollutants by Adsorption into Nanospaces of Inorganic Porous Materials
无机多孔材料纳米空间吸附去除水生有机污染物的研究
- 批准号:
14580580 - 财政年份:2002
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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