Engineering clay minerals to manage the functions of soils

Abstract

This is a 'preproof' accepted article for Clay Minerals. This version may be subject to change during the production process.

Differential Adsorption of Dissolved Organic Matter and Phosphorus on Clay Mineral in Water-Sediment System

“…These findings highlighted the distinct roles of Ca/Fe−Mt in nutrient cycling and their potential impacts on water quality and ecosystem health. 7,20 The abundance and distribution of Fe−Mt in lake sediments might play a crucial role in controlling eutrophication in lakes, while Ca−Mt might be more involved in regulating the cycling of C and energy in aquatic food webs. 51,52 Furthermore, the effect of environmental factors, such as pH, temperature, and oxygen content, on the adsorption behavior of Ca/Fe−Mt for P and DOM highlighted the sensitivity of these interactions to changing conditions in the lake environment (Figures S3 and S7).…”

“…These sediments act as reservoirs, accumulating P and DOM and subsequently releasing these components into the water through internal recycling and sediment resuspension. Clay minerals, particularly montmorillonite (Mt), are key players in controlling the cycling of P and DOM . Mt, characterized by its 2:1 phyllosilicate structure, comprising two tetrahedral sheets flanking a central octahedral sheet, interfaces with P and DOM through complex adsorption processes influenced by various chemical and physical parameters. − Additionally, the presence of Fe and Al oxides on clay mineral surfaces can also impact the adsorption of P and DOM .…”

“…Clay minerals, particularly montmorillonite (Mt), are key players in controlling the cycling of P and DOM . Mt, characterized by its 2:1 phyllosilicate structure, comprising two tetrahedral sheets flanking a central octahedral sheet, interfaces with P and DOM through complex adsorption processes influenced by various chemical and physical parameters. − Additionally, the presence of Fe and Al oxides on clay mineral surfaces can also impact the adsorption of P and DOM . Despite the critical role of Mt in determining the fate of P and DOM in freshwater systems, the mechanisms governing these processes remain poorly understood.…”

Understanding the Nanoscale Affinity between Dissolved Organic Matter and Noncrystalline Mineral with the Implication for Water Treatment

“…Nanoparticles produced on the surface of natural clay minerals are tightly bound to the clay silicate layer, preventing them from aggregating . Among them, montmorillonite (Mt) has a 2:1 layered structure, negative layer charges, and exchangeable hydrated cations (e.g., Na + , Mg 2+ , and Ca 2+ ) in the interlayer space . Hence, the effectiveness of ion exchange in Mt increases the Ca amount, which has the potential to form calcium-containing minerals .…”

“…20 Among them, montmorillonite (Mt) has a 2:1 layered structure, negative layer charges, and exchangeable hydrated cations (e.g., Na + , Mg 2+ , and Ca 2+ ) in the interlayer space. 21 Hence, the effectiveness of ion exchange in Mt increases the Ca amount, which has the potential to form calcium-containing minerals. 22 During CaP precipitation, both Mt and DOM can strongly influence the earliest nucleation and subsequent CaP particle aggregation in the soil.…”