We recently reported the development of a novel and highly effective nanoscale polymeric material for rapid and efficient removal of heavy metal ions from aqueous solutions (Tolani et al., 2010). The polymeric material was fabricated in the form of nanofibers that were subsequently modified by cysteine, a nonessential amino acid with a very high binding constant for some toxic heavy metal ions like As(III), Cd(II), Pb(II) and Cu(II). We demonstrated
the removal of these metal ions from aqueous solutions using these modified polymer nanofibers. In this article, we extend the applicability of this material to the removal of Cr(III) and Cr(VI) from real tannery waste water. The tanning industry forms the backbone of the Egyptian leather industry much of which adopts the chromium tanning process because of its processing speed, low costs, and light color of leather and greater stability of the resulting
leather. In general, tanning process using chromium compounds is among the most common methods for processing of hides (Sreeram and Ramasami, 2003). In this process about 60e70% of chromium reacts with the hides resulting in about 30e40% of the chromium to remain in solid and liquid. In most cases, the waste water of tanning process is usually discharged, without proper treatment, into the sewerage system causing serious environmental impact. Hence, there is need to minimize the generation of hazardous chemicals, while increasing the treatment efficiencies of the waste water generated. Therefore, investigation of alternative and appropriate materials and technologies for the removal of
heavy metals ions from waste waters is of utmost importance.
We recently reported the development of a novel and highly effective nanoscale polymeric material for rapid and efficient removal of heavy metal ions from aqueous solutions (Tolani et al., 2010). The polymeric material was fabricated in the form of nanofibers that were subsequently modified by cysteine, a nonessential amino acid with a very high binding constant for some toxic heavy metal ions like As(III), Cd(II), Pb(II) and Cu(II). We demonstrated
the removal of these metal ions from aqueous solutions using these modified polymer nanofibers. In this article, we extend the applicability of this material to the removal of Cr(III) and Cr(VI) from real tannery waste water. The tanning industry forms the backbone of the Egyptian leather industry much of which adopts the chromium tanning process because of its processing speed, low costs, and light color of leather and greater stability of the resulting
leather. In general, tanning process using chromium compounds is among the most common methods for processing of hides (Sreeram and Ramasami, 2003). In this process about 60e70% of chromium reacts with the hides resulting in about 30e40% of the chromium to remain in solid and liquid. In most cases, the waste water of tanning process is usually discharged, without proper treatment, into the sewerage system causing serious environmental impact. Hence, there is need to minimize the generation of hazardous chemicals, while increasing the treatment efficiencies of the waste water generated. Therefore, investigation of alternative and appropriate materials and technologies for the removal of
heavy metals ions from waste waters is of utmost importance.
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