Study of organic-matter intercalated vermiculitic phases in the hydromorphic red earth sediments
Study of organic-matter intercalated vermiculitic phases in the hydromorphic red earth sediments
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水形红土沉积物中有机质插层蛭石相的研究
DOI：
10.1016/j.clay.2020.105744
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发表时间：
2020-10
影响因子：
5.6
通讯作者：
Chen Liu
中科院分区：
文献类型：
--
作者：
Hanlie Hong;Qian Fang;Gordon Jock Churchman;Lulu Zhao;Kaipeng Ji;Xiaoxue Jin;Ke Yin;Chaowen Wang;Chen Liu
铝羟基插层蛭石相广泛存在于成土环境中，而土壤有机质插层的研究报道较少。为了更好地了解混合层状粘土矿物中的层间组分以及这种罕见的有机质（OM）夹层混合层状粘土矿物的形成过程，对宣城红土沉积物中伊利石-蛭石（I/V）混合层状粘土（I/V）与有机质（OM）在水相条件下的插层进行了研究。乙二胺四乙酸铵（EDTA）和酸性草酸铵（NH 4 OX）对有机填料的选择性萃取表明，在2：1粘土的层间空间中，与有机络合物相关联的组分主要是Fe-和Al-（氧）的氢氧化物，它们在乙二醇溶剂化后阻止了大量的溶胀，在加热后完全塌陷。OM层间填充物含有CH 3（CH 2）、C双键O、COO-和N单键H官能团，并且尽管与层间表面的结合强度可能改变，但对H2 O2萃取具有抗性。在加热至~300 °C时，OM填充物从层间空间逸出，这导致2：1粘土物质的坍塌。原生伊利石在成土过程中的蚀变导致K的释放和水化阳离子在层间空间的嵌入，以及Al和Fe的淋溶。在层间区域存在可交换阳离子和Al、Fe低聚物的积累，影响I/V粘土的醇解和加热行为。水相条件有利于有机聚合物向小尺寸有机酸的转化，从而有利于层间有机物填充物插入2：1粘土中。成土过程包括粘土矿物的风化和有机质的分解，导致形成层间粘土-有机复合体的水成土。
Al-hydroxy intercalated vermiculitic phases have been widely observed in pedogenic environment, but soil organic intercalations have rarely been reported. In the present study, mixed-layer illite–vermiculite (I/V) with organic matter (OM) intercalation under hydromorphic conditions in the Xuancheng red earth sediments was investigated in order to better understand the interlayer components occurring in mixed-layered clay minerals and the formation of this unusual OM interlayered mixed-layer clay species. Selective extraction of organic fillings by ammonium ethylene diamine tetraacetic acid (EDTA) and acid ammonium oxalate (NH4OX) showed that the components associated with organic complexes in the interlayer space of the 2:1 clays are mainly Fe- and A1-(oxy)hydroxides, which block substantial swelling after ethylene glycol solvation and complete collapse after heating. The OM interlayer filling contains CH3(CH2), Cdouble bondO, COO-, and Nsingle bondH functional groups and are resistant to H2O2extraction although the binding intensity to the interlayer surface may change. Upon heating to ~300 °C the OM filling escapes from the interlayer space which causes the collapse of the 2:1 clay species. Alteration of primary illite during pedogenesis causes release of K and intercalation of hydrated cations in the interlayer space, and also leaching of Al and Fe. There is accumulation of exchangeable cations and Al and Fe oligomers in the interlayer region, which affects the behavior of I/V clays on glycolation and heating. Hydromorphic conditions favor the transformation of organic polymers into small size organic acids, and thus, favor the intercalation of interlayer OM filling into the 2:1 clays. Pedogenesis processes involves both the weathering of clay minerals and the decomposition of OM, leading to formation of interlayer clay-organic complexes in a hydromorphic soil.
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DOI：
10.1007/978-3-030-58292-0_90058
发表时间：
2021
期刊：
Encyclopedic Dictionary of Archaeology
影响因子：
--
作者：
通讯作者：
--
影响因子：
6.1
作者：
M. Skiba;Marek Szczerba;S. Skiba;D. Bish;Malagorzata Grybos
通讯作者：
M. Skiba;Marek Szczerba;S. Skiba;D. Bish;Malagorzata Grybos
影响因子：
5
作者：
M. Schnitzer;I. Hoffman
通讯作者：
M. Schnitzer;I. Hoffman
DOI：
10.2136/sssaj1988.03615995005200030049x
发表时间：
1988-05
影响因子：
2.9
作者：
M. Ransom;J. Bigham;N. Smeck;W. Jaynes
通讯作者：
M. Ransom;J. Bigham;N. Smeck;W. Jaynes
DOI：
10.1016/j.saa.2011.10.078
发表时间：
2012-04-01
影响因子：
4.4
作者：
Alstadt, Kristin N.;Katti, Dinesh R.;Katti, Kalpana S.
通讯作者：
Katti, Kalpana S.