Cadmium is chemically very similar to  zinc and can replace it in biochemical reactions, for example, act as pseudo activator or, alternatively, an inhibitor of zinc-containing proteins and enzymes (and there are over three or four hundreds of Zn containing enzymes in human organism). Cadmium accumulates intensively with a lack of zinc and / or selenium and aggravates deficiency of these micronutrients. 

Cadmium is an antagonist of Zn, Сu, Se and Fe. Usually these elements protect our body from the toxic effect of cadmium, but when exposed with its high concentrations cadmium  can displace these elements and impair protein metabolism. 

And therefore, Cadmium is considered in charge of the development of kidney damage, nervous system and testes and prostate (Zn) in men and ovaries in women. 

yes , I  prerfer, so you update à new article on the journal of désalination and treatement water

please check the link and attached file and I hope to be useful for you.

http://www.annclinlabsci.org/content/35/4/428.full.pdf+html

Cadmium is a non essential element and it lacks it own transmembrane through which it is normally accumulated. Because of it similarity with Zn in terms of their properties, it usually dislocate or displaces Zn for it to be accumulated. This therefore results in cadmium been increased and zinc on the other hand been reduced when exposed.