Water-soluble Active Carbons (WSACs) were yielded by oxidative degradation of carbon black particles. WSACs consist of hydrophobic polynuclear aromatic planes and many hydrophilic functional groups. They dissolve in neutral and alkaline aqueous solutions and capture organic compound molecules on their hydrophobic planes. The amounts of the organic compounds captured by the WSACs are roughly equal to those of activated carbons. Moreover, it was found that WSACs reduce the toxicity of the pesticide, TPN, by capturing the pesticide molecules. This material would be a promising candidate for an environment restorative material.