Fertilizer-Holding Performance of Graphene on Soil Colloids Based on Double Electric Layer Theory.

As shown in Figure 2 a, the conductivity of the soil leachate obtained solution showed a decreasing trend from G0 to G50, before increasing with an increase in graphene concentration at G100.

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Effect of Graphene on Ion Concentration The zeta potential of soil colloids showed an increasing trend with an increase in graphene concentration ( Figure 1 a).

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