The coupled proton-buffering mechanisms in permanent-charge soils and variable-charge soils remain insufficiently quantified

The gap

Evidence profile

Sourced from the inline gaps and stated research gap and future-work section of the source papers, classified as general, spanning 3 journals.

Supporting evidence — 4 representative gaps

• Stabilization mechanism and strength evolution of expansive soil stabilized by calcium carbide residue-rice husk ash binder: mineralogical and microstructural evidence (2026) · Frontiers in Materials · doi

  In addition, the long-term durability of stabilized soil under complex service conditions such as wet- dry cycles, freeze-thaw cycles and acid-base erosion remains to be systematically evaluated. Nevertheless, several limitations of this study should be acknowledged. Third, direct experimental evidence for the ion exchange mechanism is still insufficient; supplementary tests including zeta potential and cation exchange capacity (CEC) measurements will help to verify the micro-electrochemical mechanism more rigorously.

  generalinline gaps
  Keywords: cycles exchange mechanism addition long term durability stabilized soil complex service conditions freeze thaw acid
• Career Prospects, Agricultural Technology, and Social Context as Drivers of Young People’s Agricultural Career Intentions: A TPB–SCCT-Informed Model (2026) · Current Research Bulletin · doi

  The effect of electro-kinetic remediation on soil properties, such as strength and microstructure, is less understood. There is a need to investigate the impact of different electrode materials on soil remediation. The study addresses the gap in knowledge regarding the geotechnical properties of lead-contaminated lateritic soil after electro-kinetic remediation.

  generalstated research gapevidence 5/5
  Keywords: effect electro-kinetic remediation soil properties strength microstructure less
• Divergent Proton-Buffering Processes and Acidification Risks in Permanent and Variable-Charge Soils (2026) · Agronomy · doi

  The coupled proton-buffering mechanisms in permanent-charge soils and variable-charge soils remain insufficiently quantified. The classical acid-neutralizing framework does not fully explain the proton-buffering behaviors in variable-charge soils.

  generalstated research gapevidence 5/5
  Keywords: coupled proton-buffering mechanisms permanent-charge soils variable-charge remain insufficiently
• Career Prospects, Agricultural Technology, and Social Context as Drivers of Young People’s Agricultural Career Intentions: A TPB–SCCT-Informed Model (2026) · Current Research Bulletin · doi

  Future studies should investigate the effect of electro-kinetic remediation on other types of heavy metal contamination or soil types. Research should examine the long-term stability and durability of electro-kinetic remediation-treated soils. Further studies can explore the optimization of electrode materials and treatment conditions for improved soil remediation.

  generalfuture-work sectionevidence 4/5
  Keywords: future studies investigate effect electro-kinetic remediation other types

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