Remediation of soil contaminated with decabrominated diphenyl ether using white rot fungi

Abstract

Biodegradation of decabrominated diphenyl ether in soil by white rot fungi under various experimental conditions was investigated in this study. It was found that BDE-209 in soil could be rapidly and efficiently degraded by white rot fungi, and the biodegradation fits the pseudo-first-order kinetics during a 15-day incubation period. The residues of BDE-209 in soil decreased with the increased amount of white rot fungi addition. It can be seen from the results that white rot fungi have a good degradation ability with one-step and two-step addition method. In native soil, the degradation of BDE-209 reached 52.65%, which was higher than that in sterilized soil. About 37.76Á53.74% of BDE-209 degradation was observed in different soil types after 15 days. In addition, it was confirmed in this study that the presence of Cu 2' , Cd 2' could enhance the remediation of soil contaminated with BDE-209, and the residues decreased by 69.20% and 54.65% for Cu 2' and Cd 2' treatment, respectively. However, the superior ability of white rot fungi to degrade BDE-209 was not obvious at low pollution level (B0.5 mg kg (1 ).

Rapid Determination of the Immobilization Conditions for Lead and Cadmium in Soil Using 2, 4, 6-Trimercaptotriazine, Trisodium Salt, Nonahydrate

“…Chemical immobilization has been widely studied as a potentially reliable and cost-effective remediation technique, and various chemical amendments have been screened (Ashrafi, Mohamad, Yusoff, & Hamid, 2014;Chiochetta et al, 2016;Lahori et al, 2017;Radziemska, Gusiatin, & Bilgin, 2017;Wu, Zhao, Liu, Fan, & Li, 2013;Yuan, Chai, Z. Yang, & W. Yang, 2017). Heavy metals are immobilized by solid-liquid reactions or solid-solid reactions, including adsorption, precipitation, co-precipitation, and chelation (Basta & McGowen, 2004;Bolan et al, 2014;Zhang et al, 2014).…”