Chromium Cr(VI) is highly toxic, carcinogenic, mutagenic to most of the living organisms when its concentration level is higher than 0.05 ppm, and extremely mobile than Cr(III). Therefore, there is a great importance to remove Cr(VI) from aqueous solution, to prevent the deleterious impact of the Cr(VI) on the human health. The composite nanofibers had a positive effect on the absorption of Cr(VI) ions under neutral and acidic conditions. The saturated adsorption reached the highest when pH was 2 at(76.98%), whereas it was in low level when pH was 9 (59.13%), that was in composite nanofibers containing the same chemical components when CNTs (1g). This paper propose a method that aims to remove Cr(VI) from wastewaterof the textile dyeing industryusingcompositenanofibers solution.

Microorganisms present in drinking water sources such as bacteria targeted with the aim of limiting their growth as well as eliminating them, because of their significant negative effects on human health. A chemical used that contains a mixture of chitosan, polyvinyl alcohol, nanomagnetic iron oxide, as well as nanocarbon. This chemical obtained in the form of nanofibers by the electric spinning process, the properties of this substance and its shape studied using the scanningelectronic microscope (SEM) as well as the transmission electronic microscope (TEM).The type and shape of bacteria studied after completing the processes of separation from the sources drinking water according to the approved steps, preparing it for its sensitivity and chemical impact in private microbiology laboratories, where we indeed able to know the type, shape and name of bacteria. The results were clear and distinctive on the ability of this chemical to limit the growth of bacteria and eliminate them. The substance chitosan with a certain concentration had a great ability to clearly influence the bacterial activity in drinking water and eliminate it. This paper aims to show the bacteriaeffects on the public health, clearfy their shape and type, as well as stopping and eliminating the bacterial growth.