Data for: Using nanobubblized carbon dioxide for effective microextraction of heavy metals

Figure 1 (a) Technological scheme of a nanobubble generator. (b). Possible concentration and detection of NCHM. Some blurry scans of NCHM were mainly due to the Tyndall effect. (c). Possible interconnection obtained over the surface modification and the consequent pH variation under the distilled aqueous environment of each sample. Figure 2 Possible interactions between heavy metal ions (M) and the modified carbonaceous surface under the aqueous solution.