Linking micro-aggregation to the sequestration of organic pollutants in soils

将微聚集与土壤中有机污染物的封存联系起来

• 批准号: 41017521
• 负责人: Professorin Dr. Friederike Lang
• 金额: --
• 依托单位: Professur für Bodenökologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/41017521?language=en
• 关键词: Linking; micro; aggregation; sequestration; organic

Physicochemical and steric properties of organic chemicals on the one hand and physicochemical surface properties and structural properties of the sorbent on the other hand determine sorptive interactions at biogeochemical interfaces. In order to gain a mechanistic understanding of these interactions we want to combine macroscopic, micro-calorimetric, and spectroscopic methods. We hypothesise that sorption and distribution of a polar organic chemical at biogeochemical interfaces is either determined by the molecules hydrophobic R-groups (R-determined) or its functional groups (F-determined). To test our hypothesis we will study sorption of bisphenol A and fenhexamid (R-determined chemicals), and bentazon and naproxen (F-determined chemicals) in pure systems of minerals (kaolinite, illite, gibbsite, and quartz), in model substances for biofilms (polygalacturonic acid and dextran), in combined systems of mineral phases with organic layers, and in topsoils and subsoils. Interpretation and modelling of sorption isotherms and sorption kinetics derived from batch experiments together with results from diffusion experiments with polysugars of variable crosslinking will provide macroscopic insight into sorptive interactions. Information regarding the thermodynamics of sorption will by derived from micro-calorimetry. Spectroscopic (ATR FTIR, NMR) measurements deliver information on molecular interactions and structure.

另一方面，有机化学物质的物理化学和空间特性以及吸附剂的物理化学表面特性以及吸附剂的结构特性决定了生物地球化学界面上的令人着迷的相互作用。为了获得对这些相互作用的机械理解，我们希望结合宏观，微钙化和光谱法。我们假设生物地球化学界面上极性有机化学物质的吸附和分布由疏水R组分子（R确定）或其官能团（F确定）确定。 To test our hypothesis we will study sorption of bisphenol A and fenhexamid (R-determined chemicals), and bentazon and naproxen (F-determined chemicals) in pure systems of minerals (kaolinite, illite, gibbsite, and quartz), in model substances for biofilms (polygalacturonic acid and dextran), in combined systems of mineral phases with有机层，在表土和下层土壤中。从批处理实验中得出的吸附等温度和吸附动力学的解释和建模，以及与可变交联的多刺的扩散实验的结果，将为吸附性相互作用提供宏观的见解。有关吸附热力学的信息将通过微钙化元素得出。光谱（ATR FTIR，NMR）测量提供了有关分子相互作用和结构的信息。