This Science News Wire page contains a press release issued by an organization and is provided to you "as is" with little or no review from Science X staff.

Oil-eating worms provide valuable assistance in soil remediation

November 9th, 2020 Larisa Busil, Yury Nurmeev
Oil-eating worms provide valuable assistance in soil remediation
Dark-field image of crude oil droplets (a) and hyperspectral dark-field image of nematode intestine merged with hyperspectral crude oil mapping (b), obtained using reflected light spectra of intact crude oil and oil in intestine of C. elegans nematode (c). Dark-field microscopy images demonstrating the localisation of crude oil in the Dauer larvae nematodes' intestines after incubation for 42 h from L1 larvae stage: inside the foregut (d); in the midgut (e) and inside the hindgut (f). Credit: Kazan Federal University

Bionanotechnology Lab of Kazan Federal University works on adapting nematodes to consuming oil waste.

Co-author, Chief Research Associate Rawil Fakhrullin explains, "We've improved existing methods of biological remediation of soils. Our lab experiment was successful, and we have a new way of delivering oil-consuming bacteria into the soil."

The team wanted to find out whether parasitic nematodes can serve as "public transit" for marine bacteria which can consume and break down oil products into fatty acids.

"We took Caenorhabditis elegans nematodes and fed them Alcanivorax borkumensis bacteria. Nematodes have bacteria as a usual part of their diet, so there were no negative consequences for them. Furthermore, undigested bacteria changed the gut microflora of worms, which led to enhanced digestion of oil, and then left their bodies through natural ways. As another takeaway from the experiment, we found out that worms can themselves eat oil products if they are not fed anything else," says Fakhrullin.

In the worms' guts, oil dissipates into small particles of 5-6 micrometers, and bacteria easily break them down further. "Petroleum is a complex system, and there are many variations of it. We experimented with oil found in Tatarstan. We have yet to find out which components other types of oil produce while digested by nematodes," adds the researcher. As he assumes, the technology may be feasible for water bodies as well as soils.

More information:
Worms eat oil: Alcanivorax borkumensis hydrocarbonoclastic bacteria colonise Caenorhabditis elegans nematodes intestines as a first step towards oil spills zooremediation

doi.org/10.1016/j.scitotenv.2020.143209

Provided by Kazan Federal University

Citation: Oil-eating worms provide valuable assistance in soil remediation (2020, November 9) retrieved 7 January 2025 from https://sciencex.com/wire-news/366353746/oil-eating-worms-provide-valuable-assistance-in-soil-remediation.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.