پایانامه های دانشجویان ایران

مقاله Preparation of magnetic nanocomposites modified for preconcentration of bismuth and its determination by FAAS pdf دارای 5 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد مقاله Preparation of magnetic nanocomposites modified for preconcentration of bismuth and its determination by FAAS pdf کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.

این پروژه توسط مرکز مرکز پروژه های دانشجویی آماده و تنظیم شده است

توجه : در صورت  مشاهده  بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی مقاله Preparation of magnetic nanocomposites modified for preconcentration of bismuth and its determination by FAAS pdf ،به هیچ وجه بهم ریختگی وجود ندارد

بخشی از متن مقاله Preparation of magnetic nanocomposites modified for preconcentration of bismuth and its determination by FAAS pdf :

سال انتشار: 1394
محل انتشار: دومین همایش ملی تکنولوژی های نوین در شیمی و پتروشیمی
تعداد صفحات: 5
چکیده:

Water and soil pollution with heavy metals pose a threat to the environment and human health. Find an effective way to refine these metals from water is very important. In this study, the removal of bismuth from aqueous solution using modified magnetite nanocomposites was studied. Magnetite nanoparticles synthesized and modified its properties were measured using FT-IR spectroscopy. The effect of various parameters, such as pH, type and concentration of acid, effect of the adsorbent amount and effect of ultrasonication time were optimized. As a result, it is hoped to use the method for extraction and preconcentration of metal ions in real samples used effectively. The proposed method permitted a large enrichment factor (about 100). The relative standard deviation of the method was ±175 % (for ten replicate determination of 2.5 g mL-1 of Bi(III)) and the limit of detection was 3.8 ng mL-1. The results showed that Fe3O4@AAAPTS@SiO2 adsorbent could be employed as an effective material for preconcentration and their determination of Bi from aqueous solutions.