Robinson Contract Services

Heavy Metals / PTEs

Heavy Metal/Potentially Toxic Elements

 

Applications of biosolids are managed to ensure there are no adverse effects to the soil. Soil samples are taken prior to all applications. Biosolids are applied to the soil at a pH between 5.5 and 7.5, which is consistent with productive agricultural soils in the UK. Much of the UK’s heavy industry has now disappeared and so there has been a very large reduction in the form of heavy metal pollution. Heavy metals are also known as potentially toxic elements or PTEs. The amounts of heavy metal present in biosolids have reduced due to strict environmental regulations. Mineral phosphate fertilisers contain 75% more cadmium than biosolids because cadmium and phosphates are mined from the same rock. Fertilisers now average 40mg Cd/kg P2O5, whilst the concentration in biosolids would be 23 mg Cd/kg P2O5. Due to a reduction in heavy metal inputs at source, the concentrations found in biosolids has been very successfully reduced. Levels of cadmium and lead in particular have been dramatically reduced. (see graph below).

 

 

 

 

 

 

 Application of Biosolids

 

 

 

 

Skirlaugh AFC Juniors (under 15's) Sponsorship

We are proud sponsors of Skirlaugh AFC Juniors (under 15's)

Read More

Harvest Fertiliser 2018

Now is the time to get your Harvest P & K fertiliser, if you're unsure of your requirements or would like to tailor your fertiliser plan, we also …

Read More

YAMS 2018 & Agrii show 2018

A big thankyou to everyone that came and visited us at the shows despite the weather,

we look forward to seeing you next year.

Read More