Removal of Manganese Ions From Aqueous Solutions Using Polymers Derivations of Poly (Styrene-Alt- Maleic Anhydride)

در اين مطالعه رزين هاي كيليتي به عنوان مواد مناسبي براي بازيابي منگنز (II) از محلول هاي آبي مورد ارزيابي قرار گرفت. اين رزين هاي اصلاح شده در حضور اشعه ماواربنفش با 1و2-دي آمينو اتان واكنش داد تا يك رزين سه بعدي در مقياس نانو حاصل شود. رزين مورد استفاده در اين كار كوپليمري از پلي استايرن/مالييك انيدريد بود كه با روش جذب اتمي حذف يون هاي منگنز از محلول آبي مورد مطالعه قرار گرفت. روش ساده، حساس، ارزان و سريع مي باشد. رفتار جذبي رزين در pHهاي مختلف ارزيابي شد كه نشان داد حتي در pH هاي اسيدي نيز حذف يون هاي انتخاب شده انجام مي شود. رزين مورد اشاره جهت حذف منگنز از نمونه هاي حقيقي نظير آب فاضلاب هاي صنعتي به كار رفت كه نتايج خوبي از حيث كارايي حاصل شد. معادلات سينتيكي نفوذ درون ذره اي، شبه مرتبه دوم و شبه مرتبه اول براي شبيه سازي داده هاي جذبي به كار رفت و نشان داد، داده ها با رفتار سينتيكي شبه مرتبه دوم مطابقت دارد. مشخصه يابي رزين با روش هاي FT-IR، SEM و XRD انجام شد.

In this study chelating resins have been considered to be suitable materials for the recovery of Manganese(II) ions in water treatments. These modified resins were further reacted with 1,2-diaminoethan in the presence of ultrasonic irradiation for the preparation of a tridimensional chelating resin on the Nano scale for the recovery of Manganese II) ions from aqueous solutions. In this work we used copolymers derivate resin of poly (styrene – Alternative - Maleic Anhydride) and Atomic Absorption Spectroscopy for removing and determining Manganese(II) ions .The method is simple, sensitive, inexpensive and fast. The adsorption behavior of Manganese(II) ions were investigated by the synthesis of chelating resins at various pH’s. The prepared resins showed a good tendency for removing the selected metal ions from aqueous solution, even at acidic pH. Also, the prepared resins were examined for the removal of Manganese(II) ions from real samples such as industrial wastewater and were shown to be very efficient at adsorption in the cases of Manganese(II) ions ‏. The pseudo-first-order, pseudo-second-order and intra-particle diffusion kinetics equations were used for modeling of adsorption data and it was shown that pseudo-second-order kinetic equation could best describe the adsorption kinetics. The intra-particle diffusion study revealed that external diffusion might be involved in this case. The resins were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction analysis.