The study on Suaeda heteroptera Kitag, Nereis succinea and bacteria's joint bioremediation of oil-contaminated soil

Petroleum, which is sometimes called modern industrial blood, is an important energy source. However, with the increased usage of oil and related products by industries, oil pollution is becoming increasingly serious. The methods used to remediate petroleum contaminated soil can be divided into physical, chemical, and biological remediation. In recent years, more attention has been paid to the bioremediation of soil and crude oil pollutants. In this study, a pot experiment investigated the use of N. succinea, S. heteroptera, and oil degrading bacteria as bioremediators. The changes in crude oil, petroleum hydrocarbons and the component degradation rate at different concentrations of crude oil were measured so that the removal effects of N. succinea, S. heteroptera, and oil degrading bacteria on soil crude oil contamination could be ascertained. The results show that the degradation rate for crude oil, normal hydrocarbons and PAHs in the S. heteroptera - N. succinea - oil degrading bacteria group was higher than in the S. heteroptera and S. heteroptera - oil degrading bacteria groups. The results showed that the biological disturbance caused by N. succinea can promote the growth of S. heteroptera, and that the root system of the plants provide a favorable breeding and growing environment for the oil degrading bacteria. The results also suggested that they synergistically promoted the degradation and removal of petroleum hydrocarbons and PAHs.