You may find worthy to check the following report. Hope it will be of any use to you. 

https://link.springer.com/article/10.1007/s11356-017-8424-8

https://www.ncbi.nlm.nih.gov/pubmed/28097483

https://onlinelibrary.wiley.com/doi/10.1002/clen.201300353/pdf

https://books.google.co.in/books?isbn=817035384X

https://www.cabdirect.org/abstracts/20133001839.html

Dear Sunil,

Biosorption is an emerging technique for water treatment utilizing abundantly available biomaterials. Various biosorbents have been developed for fluoride removal. Chitin and chitosan are attractive adsorbents because of their unique properties like biodegradability, biocompatibility and low cost, in addition to their particular physical and mechanical properties, resulting from the presence of chemical reactive groups (hydroxyl, acetamido or amino functions) in polymer chains.

With my best regards

Prof. Bachir ACHOUR

Good answer prof. Bachir.

I am sure if you google you will find many papers about biosorption.

Regards

Good answer prof. Bachir.

I am sure if you google you will find many papers about biosorption as those suggested by Raju.

Regards

Thanks to all for valuable and kind suggestion.