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Nanobubbles (NBs) can be used as a remediation agent because of free radicals at a liquid-gas interface and could play a key role in absorbing the ionic substance. In this study, a batch test was conducted to examine the removal efficiency of NBs on heavy metal depending on silty clay contents. The NBs were generated using gas dispersion system with ceramic filter. Physical properties of NBs were investigated and analyzed by Nanoparticle Tracking Analysis (NTA) system. Sand and silty clay were artificially contaminated with copper. The silty contents were respectively contaminated in 0%, 10%, 20%, 100%. The removal efficiency of NBs was compared with that of distilled water. As a result, NBs were generally more effective than distilled water for copper removal.