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Influence of Organic Chemicals on Water Molecule Bridges in Soil Organic Matter of a Sapric Histosol
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2017-03-16 00:00:00 , DOI: 10.1021/acs.jpca.6b10207 Pavel Ondruch 1 , Jiri Kucerik 1 , Zacharias Steinmetz 1 , Gabriele E. Schaumann 1
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2017-03-16 00:00:00 , DOI: 10.1021/acs.jpca.6b10207 Pavel Ondruch 1 , Jiri Kucerik 1 , Zacharias Steinmetz 1 , Gabriele E. Schaumann 1
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Water molecules in soil organic matter (SOM) can form clusters bridging neighboring molecular segments (water molecule bridges, WaMBs). WaMBs are hypothesized to enhance the physical entrapment of organic chemicals and to control the rigidity of the SOM supramolecular structure. However, the understanding of WaMBs dynamics in SOM is still limited. We investigated the relation between WaMBs stability and the physicochemical properties of their environment by treating a sapric histosol with various solvents and organic chemicals. On the basis of predictions from molecular modeling, we hypothesized that the stability of WaMBs, measured by differential scanning calorimetry, increases with the decreasing ability of a chemical to interact with water molecules of the WaMBs. The interaction ability between WaMBs and the chemicals was characterized by linear solvation energy relationships. The WaMBs stability in solvent-treated samples was found to decrease with increasing ability of a solvent to undergo H-donor/acceptor interactions. Spiking with an organic chemical stabilized (naphthalene) or destabilized (phenol) the WaMBs. The WaMBs stability and matrix rigidity were generally reduced strongly and quickly when hydrophilic chemicals entered the soil. The physicochemical aging following this destabilization is slow but leads to successive WaMBs stabilization and matrix stiffening.
中文翻译：
有机化学物质对五味组胺土壤有机质中水分子桥的影响
土壤有机质（SOM）中的水分子可以形成簇，桥接相邻的分子片段（水分子桥，WaMBs）。假设WaMB可增强有机化学物质的物理包封并控制SOM超分子结构的刚度。但是，对SOM中WaMB动态的了解仍然有限。我们通过用各种溶剂和有机化学试剂处理水杨酸组织溶胶，研究了WaMBs稳定性与其周围环境的理化性质之间的关系。基于分子建模的预测，我们假设通过差示扫描量热法测量的WaMBs的稳定性随化学物质与WaMBs的水分子相互作用的能力降低而增加。WaMB与化学品之间的相互作用能力以线性溶剂化能量关系为特征。发现在溶剂处理的样品中，WaMBs稳定性随溶剂进行H-供体/受体相互作用的能力的增加而降低。用有机化学稳定的（萘）或不稳定的（苯酚）WaMB加标。当亲水性化学物质进入土壤时，WaMBs的稳定性和基质刚度通常会迅速而强烈地降低。该去稳定化之后的物理化学老化很慢，但会导致连续的WaMBs稳定化和基体硬化。用有机化学稳定的（萘）或不稳定的（苯酚）WaMB加标。当亲水性化学物质进入土壤时，WaMBs的稳定性和基体刚度通常会大大降低。该去稳定化之后的物理化学老化很慢，但会导致连续的WaMBs稳定化和基体硬化。用有机化学稳定的（萘）或不稳定的（苯酚）WaMB加标。当亲水性化学物质进入土壤时，WaMBs的稳定性和基质刚度通常会迅速而强烈地降低。该去稳定化之后的物理化学老化很慢，但会导致连续的WaMBs稳定化和基体硬化。
更新日期：2017-03-16
中文翻译：
有机化学物质对五味组胺土壤有机质中水分子桥的影响
土壤有机质（SOM）中的水分子可以形成簇，桥接相邻的分子片段（水分子桥，WaMBs）。假设WaMB可增强有机化学物质的物理包封并控制SOM超分子结构的刚度。但是，对SOM中WaMB动态的了解仍然有限。我们通过用各种溶剂和有机化学试剂处理水杨酸组织溶胶，研究了WaMBs稳定性与其周围环境的理化性质之间的关系。基于分子建模的预测，我们假设通过差示扫描量热法测量的WaMBs的稳定性随化学物质与WaMBs的水分子相互作用的能力降低而增加。WaMB与化学品之间的相互作用能力以线性溶剂化能量关系为特征。发现在溶剂处理的样品中，WaMBs稳定性随溶剂进行H-供体/受体相互作用的能力的增加而降低。用有机化学稳定的（萘）或不稳定的（苯酚）WaMB加标。当亲水性化学物质进入土壤时，WaMBs的稳定性和基质刚度通常会迅速而强烈地降低。该去稳定化之后的物理化学老化很慢，但会导致连续的WaMBs稳定化和基体硬化。用有机化学稳定的（萘）或不稳定的（苯酚）WaMB加标。当亲水性化学物质进入土壤时，WaMBs的稳定性和基体刚度通常会大大降低。该去稳定化之后的物理化学老化很慢，但会导致连续的WaMBs稳定化和基体硬化。用有机化学稳定的（萘）或不稳定的（苯酚）WaMB加标。当亲水性化学物质进入土壤时，WaMBs的稳定性和基质刚度通常会迅速而强烈地降低。该去稳定化之后的物理化学老化很慢，但会导致连续的WaMBs稳定化和基体硬化。
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