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أحمد عبد الله أحمد على الشافعي

Professor

أستاذ هندسة نظم المياه والري

كلية علوم الأغذية والزراعة
مبنى 2 - الدور 2 - مكتب رقم : 2أ 45
المنشورات
مقال فى مجلة
2017
تم النشر فى:

APPLICATION OF SILVER-, IRON-, AND CHITOSAN- NANOPARTICLES IN WASTEWATER TREATMENT

, M.M. Naim, A.A. El-Shafei, M.M. Elewa, A.A. Moneer . 2017

Silver nanoparticles (Ag-NPs) play an important role in the electronic industry, whereas, Zerovalent
iron (ZVI) has been widely investigated for environmental remediation due to its fairly strong reducing
power and its ability to adsorb an array of important contaminants such as heavy metals and
metalloids, while, chitosan nanoparticles (CS-NPs) have proven efficacy in removal of heavy metals,
dyes and phenols from wastewater. In the present work, chemical methods have been conducted
to prepare nanoparticles made from silver, iron, and chitosan. Ag-NPs were prepared from AgNO3
as starting material then the particles obtained were coated on filter paper; also, a cellulose acetate
(CA) membrane was prepared after mixing the casting solution with Ag-NPs, then both subjected to
Escherichia (E.) coli bacteria for testing their ability to destroy the bacteria. The E. coli was prepared
according to a standard procedure and the colonies counted before and after treatment with treated
filter paper and membrane. It is noteworthy that the present work contains a simple new method
to prepare Ag-NPs. Results proved that Ag-NPs destroy the E. coli bacteria completely at room temperature
in both filter paper and CA membrane. Also, Nano iron (nZVI) was prepared by reduction
of ferric chloride by sodium borohydride, then filtered and used to remove Cu(II) ions from aqueous
solution. CS-NPs were prepared by two methods, first by preparation of low molecular weight chitosan
(LWCS) followed by its degradation to CS-NPs using different concentrations of H2O2 solution.
The second method was done by preparing CS-NPs using AgNO3. The CS-NPs membrane was able
to biosorb 70.68 and 42.1% of NaCl from a 9.38 and 15.2 g/L salt solution respectively, whereas biosorption
of CuSO4 was 59.8% from 12.5 g/L solution, due to the presence of numerous functional
groups besides the amino and hydroxyl groups.
Keywords: Nanoparticles; Wastewater treatment; Escherichia coli; Nanosilver; Cupric ions; Nano-
zero valent iron; Nanochitosan

نوع عمل المنشور
ورقة بحثية
رقم المجلد
73
مجلة/صحيفة
Desalination and Water Treatment
الصفحات
268-280
مزيد من المنشورات
publications

An innovative polymeric membrane has been invented, which presents a breakthrough in the field of desalination membranes. It can desalinate simulated seawater of exceptionally high concentration…

بواسطة M.M. Naim, M.M. Elewa, A.A. El-Shafei, A.A. Moneer
2015
publications

Many industries, such as tanning, metal processing, electroplating, etc., include copper in their processes and discharge it in wastewater streams. The permissible limit of copper in wastewater is…

بواسطة A.A. Moneer, A.A. El-Shafei, M.M. Elewa, M.M. Naim
2016
publications

Silver nanoparticles (Ag-NPs) play an important role in the electronic industry, whereas, Zerovalent
iron (ZVI) has been widely investigated for environmental remediation due to its fairly…

بواسطة M.M. Naim, A.A. El-Shafei, M.M. Elewa, A.A. Moneer
2017