2016 : Bioremediation of soil contaminated with native polycyclic aromatic hydrocarbons from unburnt coal using an in-vessel composting method

Prof. Dr. Yulinah Trihadiningrum M.App.Sc
Dr. Ir. Sri Rachmania Juliastuti M.Eng


Abstract

The present study was undertaken to investigate the removal of 16 polycyclic aromatic hydrocarbons (PAHs) listed as priority pollutants by the US Environmental Protection Agency (USEPA-PAHs) that are found in coal-contaminated soil during simulated in-vessel composting. Contaminated soil (S) was mixed with green waste (W) in the ratios of 3:1, 1:1, and 1:3 under neutral and acidic soil conditions in laboratory-scale composting reactors. The highest removal efficiency of total 16 USEPA-PAHs (71.88%) was observed in S:W ratio of 1:1 and neutral soil treatment with the removal rate constant of 0.0106 day−1. Results found that the S:W ratio significantly influenced the removal of PAHs during composting but not the initial soil pH. The results of this research suggest that composting is a feasible and appropriate technology to remediate soil contaminated by coal-native PAH.