Phytoremediation of polycyclic aromatic hydrocarbons (PAHs) in mangrove sediments using Rhizophora mangle

Jéssica Verâne; Naiara C P Dos Santos; Verônica L da Silva; Marcos de Almeida; Olívia M C de Oliveira; Ícaro T A Moreira

doi:10.1016/j.marpolbul.2020.111687

Phytoremediation of polycyclic aromatic hydrocarbons (PAHs) in mangrove sediments using Rhizophora mangle

Mar Pollut Bull. 2020 Nov:160:111687. doi: 10.1016/j.marpolbul.2020.111687. Epub 2020 Sep 25.

Authors

Jéssica Verâne¹, Naiara C P Dos Santos², Verônica L da Silva², Marcos de Almeida³, Olívia M C de Oliveira³, Ícaro T A Moreira⁴

Affiliations

¹ Geoscience Institute, Federal University of Bahia (UFBA), Street Barão de Jeremoabo, s/n, 40170-290 Salvador, BA, Brazil. Electronic address: veranelima@yahoo.com.br.
² Department of Environmental Engineering, Polytechnic School, Federal University of Bahia (UFBA), Street Prof. Aristídes Novis, 2, Federação, 40170290 Salvador, BA, Brazil.
³ Geoscience Institute, Federal University of Bahia (UFBA), Street Barão de Jeremoabo, s/n, 40170-290 Salvador, BA, Brazil.
⁴ Department of Environmental Engineering, Polytechnic School, Federal University of Bahia (UFBA), Street Prof. Aristídes Novis, 2, Federação, 40170290 Salvador, BA, Brazil. Electronic address: icarotam@ufba.br.

PMID: 33181957
DOI: 10.1016/j.marpolbul.2020.111687

Abstract

A phytoremediation experiment was carried out in mesocosms to investigate the performance of Rhizophora mangle in the remediation of polycyclic aromatic hydrocarbons (PAHs) in mangrove sediment contaminated with crude oil. The water pH of the experiments (phytoremediation and natural attenuation) ranged from 4.9 to 8.4 at 0 and 90 days, respectively. The oxy-reduction potential (Eh) ranged from oxidising (108.0 mV, time 0) to reducing (approximately -110.0 mV, time 90) environments. Dissolved oxygen (DO) ranged from 5.7 mg L^-1 (time 0) to 4.5 mg L^-1 and 3.6 mg L^-1 (time 90) in phytoremediation and natural attenuation, respectively. The sediments had silty texture and an average concentration of 5% organic matter (OM). Phytoremediation (60.76%) showed better efficiency in the remediation of the 16 PAHs compared to natural attenuation (49.57%). Principal component analyses showed a correlation between the concentrations of PAHs with pH, Eh, OM and DO in both experiments.

Keywords: Mangrove; PAHs; Petroleum; Phytoremediation; Rhizophora mangle.

MeSH terms

Biodegradation, Environmental
Environmental Monitoring
Geologic Sediments
Petroleum*
Polycyclic Aromatic Hydrocarbons* / analysis
Rhizophoraceae*
Water Pollutants, Chemical* / analysis

Substances

Petroleum
Polycyclic Aromatic Hydrocarbons
Water Pollutants, Chemical