کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
640383 1456967 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Removal of heavy metal ions from dilute aqueous solutions by polymer–surfactant aggregates: A novel effluent treatment process
ترجمه فارسی عنوان
حذف یون های سنگین فلزات از محلول های آبی رقیق شده توسط پلیمرهای سورفاکتانت: یک فرایند تصفیه پساب جدید
کلمات کلیدی
سیستم پلیمر-سورفاکتانت، پیچیدگی و انحراف، درمان پساب آبی، از بین بردن یون فلزات سنگین استقرار، تصفیه درشت
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی

A novel treatment process for effluent streams that employs polymer–surfactant complexation and flocculation has been developed and applied to remove dilute heavy metal ions, such as Cr(III), Zn(II) and Cd(II), from aqueous solutions. This process uses cationic polymers, such as poly diallyldimethylammonium chloride (PolyDADMAC) or poly ethylenimine (PEI), as a back-bone structure onto which anionic surfactants, such as sodium dodecyl sulphate (SDS), can form micelle-like aggregates. The resulting structures, called polymer–surfactant aggregates (PSAs), have the ability to remove heavy metal ions from solution, and to form larger flocculated aggregates through a process of intermolecular association. The flocculated aggregates can then be separated from the effluent stream through a settling or coarse filtration step. In the work presented here, it is shown that 99% of 11.2 ppm Cd(II) was removed under optimum dosage using 40 ppm PEI and 0.5 mM SDS. Surface tension measurement results indicate that the removal of heavy metal ions occurs by the PSAs when the surfactant concentration is well below the critical micellar concentration. The results show that this process is effective for heavy metal ion removal at a pH range from 6 to 9, and is also effective in the presence of organic contaminants (acetone, ethanol and phenol) and in the presence of NaCl. Such a PSA complexation and flocculation process thus has potential application for the efficient removal of dilute heavy metal ions during process effluent water treatment.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 152, 25 September 2015, Pages 101–107
نویسندگان
, , ,