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مقالات شیمیایی 2013
جزئیات رویداد
همایش ، رویداد ، ژورنال
اینستاگرام تی پی بین
حوزه های تحت پوشش رویداد
  • جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 854
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     sludges produced in huge amounts by wastewater treatment plants (wwtp) display high fertility properties; however, the presence of heavy metals restricts their use for agricultural purposes. sorption capacity of sludge is generally much higher and it can also be considered as a cheap sorbent of heavy metals. the paper describes cobalt sorption by dried activated sludge (das) obtained from the aerobic phase of a wwtp. das was characterized by ft-ir spectroscopy, cation exchange capacity (cec), and atomic absorption spectrometry (aas) analysis. sorption capacity of das (q eq) increased with the initial concentration (c 0) of co2+ (cocl2) within the range from 100 μmol g−1 to 4000 μmol g−1, reaching 15 μmol g−1 and 200 μmol g−1, respectively. the maximum uptake capacity (q max) at ph 6.0 calculated from the langmuir isotherm model was (256 ± 9) μmol g−1 for co2+ ions. obtained q values were dependent on ph within the range from 3.0 to 7.0. competitive effect of other bivalent cations such as ni2+ in co2+ sorption equilibrium was confirmed; which is in agreement with the hypothesis of the decisive role of ion-exchange mechanism in metal sorption. the obtained data are discussed from the point of view of potential utilization of sludges as sorbents, i.e. in non-agricultural application.

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