☆ 4.5 Article

Phytoremediation of PAH compounds by microbial communities in sodic soil

INTERNATIONAL JOURNAL OF PHYTOREMEDIATION (2023)

Journal

INTERNATIONAL JOURNAL OF PHYTOREMEDIATION

Volume -, Issue -, Pages -

Publisher

TAYLOR & FRANCIS INC

DOI: 10.1080/15226514.2023.2170321

Keywords

Arthrobacter; Azospirillium; Biodegradation; naphthalene; Pelotomaculum; phenanthrene; soil; Sphingobium; Sphingomonas; Thirohodococcus

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Abstract

A PAH degrading microbial consortium was collected from sodic soil in India and analyzed using NGS based metagenomic approach, revealing a diverse range of species and genera involved in the degradation of pollutants. The study highlights the potential of using this consortium for bioremediation of contaminated soil due to the significant reduction in toxicity achieved through the biodegradation process.

The PAH degrading microbial consortium was collected from sodic soil of the nursery of Guru Jambheshwar University of Science and Technology, Hisar, Haryana (India). And the soil was artificially amended with phenanthrene and naphthalene to isolate the PAHs degrading microbial consortium. The diversity of microbial consortium was analyzed using the NGS (Next Generation Sequencing) based metagenomic approach. The result of diversity analysis showed species Tepidanaerobacter syntrophicus, Sphingomonas oliophenolica, Arthrobacter psychrochitinipnius, Bifidobacterium bombi, Nocardiodies islandensis, Rhodovibrio sodomensis, Thiorhodococus pfennigii, Aeromicrobium ponti, Steroidobacter dentrificans, Actinomaduria maheshkhaliensis, Dactylosporangium maewongense, Pelotomaculum isophthalicicum, and Nocardioides islandensis were present in the consortium. Moreover, Sphingomonas, Arthrobacter, Sphingobium, Azospirillium, Thirohodococcus, and Pelotomaculum were the prominent pollutant degrader genera in the microbial consortium. Since the bioremediation of these pollutants occurs with a significant reduction in toxicity, the study's perspective is to use this type of consortium for bioremediation of specifically contaminated soil. NOVELTY STATEMENTThe present work's novelty was to find the helpful microbial consortium for the bioremediation of toxic compounds such as naphthalene and phenanthrene. In this study, the degradation of such compounds was done by the various communities of genera like Bifidobacterium, Conexibacter, Sterodobacter, Rhodovibrio, Arthrobacter, Actinomadura, and Euzebya, which are rarely described in the earlier researches. Therefore, this study will enhance the quality of future research.

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Autochthonous bioaugmentation accelerates phenanthrene degradation in acclimated soil

Haiping Gu, Jie Yan, Yuhao Liu, Xuewei Yu, Yan Feng, Xuanyi Yang, Su Shiung Lam, Mu. Naushad, Cheng Li, Christian Sonne

Summary: Bioaugmentation was used to obtain a microbiome capable of degrading polycyclic aromatic hydrocarbons (PAHs). The study found that acclimating microorganisms to soil supplemented with phenanthrene led to the enrichment of PAH-degrading bacteria, including Actinobacteriota and genera such as Streptomyces, Rhodococcus, Nocardioides, Sphingomonas, and Mycobacterium. The degradation efficiency of phenanthrene in aqueous and soil cultures inoculated with phenanthrene-acclimated soil was found to be high. This research provides theoretical and practical support for the bioremediation of PAHs in the environment.

ENVIRONMENTAL RESEARCH (2023)