مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

video

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

sound

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Version

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View:

363
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Download:

156
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Cites:

Information Journal Paper

Title

A STUDY ON THE REMOVAL OF CHROMIUM(VI) OXANIONS FROM ACID SOLUTIONS BY USING OXONIUM ION-CROWN ETHER COMPLEXES AS MOBILE CARRIER AGENTS

Pages

  19-27

Abstract

 Crown ethers 12-crown-4 (12C4), benzo-15-crown-5 (B15C5), 18-crown-6 (18C6), nitrobenzo-18-crown-6 (NB18C6) dibenzo-18-crown-6 (DB18C6) and dicyclohexyl-18-crown-6 (DC18C6), dissolved in dichloromethane, are able to form oxonium-ion complexes in contact with aqueous sulfuric and hydrochloric acid solutions. This ability allows the transfer of Cr (VI) ox anions from the acid media, through an organic LIQUID MEMBRANE, into a distilled water receiving phase. Among the studied CROWN ETHERS, DC18C6 shows the highest transport efficiency. The effect of parameters influencing the process such as the crown ether concentration in the membrane, types of the organic diluent's, acid concentration in the feed phase and time is investigated and discussed. Four replicate experiments show that an average of 95.6 (±1.3)% of the initial chromium in the source phase (10-3 M Cr (VI), 6 M H2SO 10 ml) is extracted into the distilled water (10 ml) through the membrane (DC18C6 0.05 M in CH2Cl2, 20 ml) after 8 h. The corresponding result, under similar conditions, in the presence of hydrochloric acid solution (4 M) was found to be 95.0 (±1.2)%. The selectivity of the process was assessed by performing the competitive transport experiments on a solution containing Cr (VI), Ni (II), Co (II), Pb (II), Mn (II), Zn (II) and Fe (III) ions. The method was used for the RECOVERY of chromium from two real samples provided by chromium-electroplating industries.

Cites

  • No record.

    • References

  • No record.

    • Cite

    APA: Copy

    PARINEZHAD, M., & YAFTIAN, M.R.. (2007). A STUDY ON THE REMOVAL OF CHROMIUM(VI) OXANIONS FROM ACID SOLUTIONS BY USING OXONIUM ION-CROWN ETHER COMPLEXES AS MOBILE CARRIER AGENTS. IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE), 26(4), 19-27. SID. https://sid.ir/paper/547934/en

    Vancouver: Copy

    PARINEZHAD M., YAFTIAN M.R.. A STUDY ON THE REMOVAL OF CHROMIUM(VI) OXANIONS FROM ACID SOLUTIONS BY USING OXONIUM ION-CROWN ETHER COMPLEXES AS MOBILE CARRIER AGENTS. IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE)[Internet]. 2007;26(4):19-27. Available from: https://sid.ir/paper/547934/en

    IEEE: Copy

    M. PARINEZHAD, and M.R. YAFTIAN, “A STUDY ON THE REMOVAL OF CHROMIUM(VI) OXANIONS FROM ACID SOLUTIONS BY USING OXONIUM ION-CROWN ETHER COMPLEXES AS MOBILE CARRIER AGENTS,” IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE), vol. 26, no. 4, pp. 19–27, 2007, [Online]. Available: https://sid.ir/paper/547934/en

    Related Journal Papers

  • No record.

    • Related Seminar Papers

  • No record.

    • Related Plans

  • No record.

    • Recommended Workshops






    Move to top
    telegram sharing button
    whatsapp sharing button
    linkedin sharing button
    twitter sharing button
    email sharing button
    email sharing button
    email sharing button
    sharethis sharing button