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Figures & data
Table 1 Proven bentonite reserves of some clay deposits in Nigeria as at 2010 (Agwu et al., Citation2015)
Figure 1. Periwinkle shells
Figure 2. Mucuna solannie pods and seeds after harvesting
Figure 3. Scanning electron microscope (SEM) image of periwinkle shell powder (Abdelmalik & Sadiq, Citation2019)
Figure 4. Elemental count for periwinkle shell
Figure 5. Scanning electron microscope (SEM) image of mucuna solannie
Figure 6. Elemental count for mucuna solannie
Table 2. Comparison—API bentonite specifications (AMOCO, 1994)
Figure 7. Local bentonite (LB1—LB2) and foreign bentonite (FB1—FB2) fluid loss curve
Figure 8. Foreign bentonite (FB1—FB2) and beneficiated bentonite (BB1—BB5) fluid loss curve
Figure 9. Local bentonite (LB1—LB2), foreign bentonite (FB1—FB2) and beneficiated bentonite (BB1—BB5) fluid loss curve
Figure 10. Local bentonite (LB1—LB2) and foreign bentonite (FB1—FB2) dial reading at 600 rpm curve
Figure 11. Foreign bentonite (FB1—FB2) and beneficiated bentonite (BB1—BB5) dial reading at 600 rpm curve
Figure 12. Local bentonite (LB1—LB2), foreign bentonite (FB1—FB2) and beneficiated bentonite (BB1—BB5) dial reading at 600 rpm curve
Figure 13. Regression plot of beneficiated bentonite against dial reading at 600 rpm
Figure 14. Local bentonite (LB1—LB2) and foreign bentonite (FB1—FB2) YP/PV ratio curve
Figure 15. Foreign bentonite (FB1—FB2) and beneficiated bentonite (BB1—BB5) YP/PV ratio curve
Figure 16. Local bentonite (LB1—LB2), foreign bentonite (FB1—FB2) and beneficiated bentonite (BB1—BB5) YP/PV ratio curve
