As shown by Fig. 10, at HNT loading fraction of 25% and 50 wt%,the adsorption capacity of the beads comprising the HNTs mined from Dragonite had a larger adsorption capacity of 14.2 mg/g as compared to that of Matauri Bay, 10.55 mg/g. The difference in adsorption capacity could be due to the difference in the structure of the HNT used. As shown in Table 2, the surface area the ultrasound amplitude was increased from 30% to 70%. This can be explained by bombardment of cavitation exposed by sonication that causes a significant reduction in the size of nano particle,as reported by Tsai, Bai, and Chen (2008). On the other hand, by increasing the ultrasound amplitude, the sizes of nano particles are decreased. This effect provides a more specific surface area on the CT/HNT beads and therefore, the adsorptionof copper ions onto the beads can occur at a faster rate and ahigher adsorption capacity. Moreover, the formation of micro-jets and turbulence during sonication can result in cavitation effects which induce micro mixing by collapsing the formed micro bubbles