Extraction and preconcentration of Pb(II) from water and soil samples using modified activated carbon

سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 576

فایل این مقاله در 10 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

JR_ICC-3-1_005

تاریخ نمایه سازی: 18 تیر 1394

چکیده مقاله:

In this work, a new extractant was prepared by immobilizing ligand 2-(5-bromo-2- pyridylazo)-5-diethylaminophenol, (5-Br-PADAP), on the activated carbon and, then, applied to extraction of Pb(II) prior to determination by flame atomic absorption spectrometry. It was confirmed by FT- IR analysis. The metal ion was retained on the 0.05 g of the sorbentin the pH range 6-8, and then eluted with 5 mL of 0.5 mol L^-1 nitric acid.Seven replicate determinations of a 1.0 μg mL^-1 of lead solution in the final solution gave relative standard deviation of ±3.3%. The maximum equilibrium capacity of the new sorbent from Langmuir model was 18.2 mg g^-1. The linearity was maintained in the concentration range of 0.1-10.0 ng mL-1 for the concentrated solution. The limit of detection based on three times thestandard deviation of the blank ( 3σbl/m), was found to be 0.83 ng mL^-1 in original solution. Common coexisting ions did not interfere with the separation and determination of the lead. The prepared sorbent was applied to the preconcentration of Pb(II) in water and soil samples with satisfactory results.

کلیدواژه ها:

نویسندگان

Fatemeh Sabermahani

Department of Chemistry, Payame Noor University, Kerman, Iran

Nosrat Madadi Mahani

Department of Chemistry, Payame Noor University, Kerman, Iran