Remediation of Contaminated Groundwater Using Nano-Carbon Colloids

The paper deals with a novel method of obtaining nano-carbon colloids (NCC). The method allows synthesizing aqueous dispersions of NCC with the sizes in the range of 1–100 nm, concentration of 150–400 ppm and pH of 2.8–3.1. Due to functional carboxyl groups the ion exchange capacity of carbon colloids obtained is very high — 7.4 mmol/g for a monovalent cation. NCC can be used for effective removal of metal ions (Zn, Ni, Cu, Sb, Co, Cd, Cr, etc.) from contaminated water.