Nanotechnology has found a range of applications in bio- and environmental remediation. For example, graphene and dendrimers have been used for water desalination or purification:

http://www.nature.com/nnano/journal/v10/n5/abs/nnano.2015.37.html

http://pubs.acs.org/doi/abs/10.1021/es505518r?journalCode=esthag

Carbon nanotubes and silver nanoparticles have been used for antibacterial:

http://www.sciencedirect.com/science/article/pii/S1549963406003467

http://pubs.acs.org/doi/abs/10.1021/la800951v

And functional beta lactoglobulin amyloids (~5-10 nm in diameter and micrometers long) purified from whey, have been used for water purification and iron fortification, with no toxicity observed:

https://www.nature.com/nnano/journal/v11/n4/abs/nnano.2015.310.html

https://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2017.58.html

Also silver nanoparticles have been used for anti-pollen

http://www.sciencedirect.com/science/article/pii/S0269749113002224

Hope that helps.

I hope you will find these link helpful. 

http://www.scielo.cl/pdf/rcsuelo/v8nespecial/art07.pdf

http://omicsonline.org/laboratory-s...anotechnology-2155-6199.1000160.pdf

http://link.springer.com/chapter/10.1007%2F978-90-481-3678-0_13

https://www.researchgate.net/deref/http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpubmed%2F21255372

https://www.ncbi.nlm.nih.gov/pubmed/24730286

https://www.ijcmas.com/vol-5-1/Mahmoud%20M.%20Berekaa.pdf

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.950.2859&rep=rep1&type=pdf

https://www.hindawi.com/journals/jnp/2014/431787/

https://link.springer.com/chapter/10.1007%2F978-90-481-3678-0_13

Chapter Chapter 2 Nano-Bioremediation Applications of Nanotechnology...

Kindly check..

https://www.hindawi.com/journals/jnp/2014/431787/

See this too..

http://www.crcnetbase.com/doi/abs/10.1201/9781315374536-3

Also to explore..

http://www.biotecharticles.com/Environmental-Biotechnology-Article/Nanotechnology-in-Bioremediation-2311.html

More to see..

http://www.jmaterenvironsci.com/Document/vol8/vol8_N2/78-JMES-2831-Yadav.pdf

See on wiki...

https://en.wikipedia.org/wiki/Nanoremediation

Thank you very much Surender Singh