Plastic toxicity

[Cory]

I read some things that caught my attention. I wonder would ozone destroy these chemicals listed in the articles?

https://www.reef2rainforest.com/201...reatens-marine-conservation-and-human-health/

https://scinapse.io/papers/1979957022

 

[Scrubber_steve]

I read some things that caught my attention. I wonder would ozone destroy these chemicals listed in the articles?

https://www.reef2rainforest.com/201...reatens-marine-conservation-and-human-health/

https://scinapse.io/papers/1979957022

I'm taking a bucket next visit to the LPS.

 

[Randy Holmes-Farley Verified Community Expert]

I read some things that caught my attention. I wonder would ozone destroy these chemicals listed in the articles?

https://www.reef2rainforest.com/201...reatens-marine-conservation-and-human-health/

https://scinapse.io/papers/1979957022

Nonyl phenyl will be broken down by sufficient ozone. It is also skimmable and will bind to GAC.

 

[Scrubber_steve]

Nonyl phenyl will be broken down by sufficient ozone. It is also skimmable and will bind to GAC.

What are your thoughts on the first link concerning plastic bags Randy?

There would be a limit to the amount of nonylphenol that could leach, over time, surely?

 

[Randy Holmes-Farley Verified Community Expert]

I think the concern inside a plastic bag is one thing.

To suggest it happens to a problematic concentration from "plastic bags and containers found on beaches and in the great oceanic “garbage patches.” seems to ignore the issue of dilution.

 

[Cory]

I'm taking a bucket next visit to the LPS.

Me too! Its unfortunate that i wasn't aware of these things, such as my pvc pond liner having it. I suspect something in the liner killed one of my urchins.

 

[Cory]

Nonyl phenyl will be broken down by sufficient ozone. It is also skimmable and will bind to GAC.

Thanks that makes it less threatening. I wonder if this chemical leaches indefinitely or eventually comes to a stop and no more leaches out.

 

[Cory]

Im also curious if this could be a contributing factor to unknown tank deaths?

For example, hobbiest A searches their entire tank for their recent rtn event for rusting metals, checks all parameters yet nothing is listed as a cause. However he just added a new skimmer, or a new powerhead that leached a substantial amount of some toxic plastic chemical. Or he just set up some new pvc plumbing...

 

[Randy Holmes-Farley Verified Community Expert]

Thanks that makes it less threatening. I wonder if this chemical leaches indefinitely or eventually comes to a stop and no more leaches out.

It reduces release over time, but I do not know how long that takes.

As to tank deaths, it is possible, but there are far more toxic organics being produced by organisms in the tank too.

 

[Cory]

It reduces release over time, but I do not know how long that takes.

As to tank deaths, it is possible, but there are far more toxic organics being produced by organisms in the tank too.

Are you talking zoanthids or some other biological chemical?

 

[Randy Holmes-Farley Verified Community Expert]

FWIW, I think the concern in a tank is far, far less than in a bag because in a bag there is nowhere for the nonylphenol to go except into the fish membranes. In a reef tank, the poorly soluble nonylphenol may just bind to detritus and all sorts of other hydrophobic surfaces and materials in the water.

Are you talking zoanthids or some other biological chemical?

All sorts of toxins from all sorts of organisms. A large fraction of the organisms we keep incorporate them to prevent predation and/or kill nearby competitors. Those can either be intentionally be released, or released if the organism dies. Dino toxins, for example.

 

[Cory]

FWIW, I think the concern in a tank is far, far less than in a bag because in a bag there is nowhere for the nonylphenol to go except into the fish membranes. In a reef tank, the poorly soluble nonylphenol may just bind to detritus and all sorts of other hydrophobic surfaces and materials in the water.



All sorts of toxins from all sorts of organisms. A large fraction of the organisms we keep incorporate them to prevent predation and/or kill nearby competitors. Those can either be intentionally be released, or released if the organism dies. Dino toxins, for example.

What do you think about bpa as to this article? As youll recall i used a soft pvc liner in my reef pond and had a sea urchin die in a few days.

Abstract
Abstract Bisphenol-A (BPA), a known ecological endocrine disruptor, is commonly used as an additive in the manufacture of flexible polyvinyl chloride (PVC) membranes. To assess the potential of artificial pond PVC liners as sources of BPA contamination, a laboratory extraction of BPA from a liner into water was conducted. The average blank-corrected BPA released by the liner, on a BPA/liner mass basis, was 28.4 ± 5.8 μg g −1 . On the basis of surface area the amount released was 0.84 ± 0.16 μg cm −2 . Given this quantity of BPA in a liner, a simple release model indicates that PVC pond liners are a potentially significant source of exposure of artificial pond aquatic organisms to BPA.

 

[Randy Holmes-Farley Verified Community Expert]

I don’t know if BPA is toxic to an urchin.

 

[Cory]

I don’t know if BPA is toxic to an urchin.

Okay no problem. Do you know if its also skimmable and removable by carbon/ ozone?

 

[Cory]

I should also mention that both my sea urchins spawned. One died a few days afterwards and the other is regrowing its spines which i feed daily sinking kelp wafers. It doesnt move from its spot. I wonder if they die after spawning?

 

[Randy Holmes-Farley Verified Community Expert]

BPA will be be bound by carbon and broken by ozone, if there is enough.