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MARINE ENVRIONMENT

Marine Biodegradation proved beyond doubt

Single-use plastic is now used more than ever before for Personal Protective Equipment, food packaging and for other applications to protect us from microbial attack, and plastic is the only material which can itself can be made anti-microbial at reasonable cost – using a technology known as d2p developed by the AIM-listed British company, Symphony Environmental.

However, no matter how much governments promote re-use and recycling, some of the plastic will always get into the open environment where it disintegrates into microplastics and can lie or float around for decades. It is this which has generated monumental public concern about plastic, especially in the oceans, and has created plastiphobia, leading to an outright ban in some countries.

So, what if it were possible to make plastic so that it biodegrades at the end of its useful life if it gets into the open environment, leaving no toxicity? This is the holy grail, and it has now been proved beyond doubt by scientists at the Laboratoire d’Océanographie Microbienne, in a four-year study funded by the French government, of Symphony’s d2w oxo-biodegradable plastic plastics in the marine environment.

The purpose of the ANR-OXOMAR project is to investigate whether oxo- biodegradable plastics will fully biodegrade in a reasonable time in the marine environment, and to investigate whether oxo-biodegradable plastic or its by-products create any toxicity in the marine environment. It involves the complementary expertise of four independent laboratories (CNEP, LOMIC, ICCF, and IFREMER).

A summary of the results, dated 4th September 2020, says:

“We have obtained congruent results from our multidisciplinary approach that clearly shows that Oxo-biodegradable plastics biodegrade in seawater and do so with a significantly higher efficiency than conventional plastics. The oxidation level obtained due to the d2w prodegradant catalyst was found to be of crucial importance in the degradation process. Out of the six-formulations tested, the Mn/Fe pro-oxidant was the most efficient, with no toxic effects under our experimental conditions. Biodegradability was demonstrated either by using the culture bacteria Rhodococcus rhodochrous or by a complex natural marine community of microorganisms.”

Perhaps it is now time for all short-life plastic products to be made with this technology.

Natural Ageing

Evidence is available – from tests done in real time at Bandol on the coast of France that oxo-bio plastic will degrade to low molecular-weight materials under natural conditions in water, and samples aged under those conditions were studied at Queen Mary University London where the abiotically degraded plastic was presented as the only source of carbon available to the bacteria. The samples were proved to be biodegraded by bacteria commonly found in the oceans, and separate samples were biodegraded by bacteria commonly found on land.  The degraded plastic was also proved to be non-toxic to those bacteria.

For the OPA response to the Plymouth report see opa-comments-on-plymouth-10

Links

  • Plastics in the marine environment (link)
  • OPA response to latest UNEP report on  Marine Plastic Debris and Microplastics, July 2016 (link)
  • Microplastics (link)
  • Just the facts please (OPA Response to on-line article – The False Promise of Biodegradable Plastic,
    July 2016 (link)
  • Bioplastics – no better for the marine environment (link)
  • Are we there yet? – UK plastic waste ends up in the Arctic, 6 July 2016 (link)
  • “It’s not just the plastic, muddying the water” OPA comments on UN Conference, 27 May 2016 (link)
  • Comment on “The New Plastics Economy – rethinking the future of Plastics”,
    Published by the Ellen MacArthur Foundation, February 2016 (link)
  • OPA Response to UNEP REPORT ON Biodegradable Plastics and Marine Litter
    – Author – Dr Peter Kershaw, Nov 15 (link)
  • OPA Member speaks at the UN, March 2015 (link)
  • Applus Test Report – Determination of Acute Ecotoxicity in Fish – 25-March 2011 (link)
  • BANDOL reports on degradation under natural conditions in seawater. (link)