الفعل التآزري لحمض أحادي أتيل هكسيل الفوسفور على اسـتخلاص التوتياء والكادميوم بواسطة حمض دي أتيل هيكسل الفوسفور
Abstract
Simultaneous extraction of zinc and cadmium by mix of Di-2-Ethyl Hexyl Phosphoric Acid (DEHPA) and Mono-2-Ethyl Hexyl Phosphoric Acid (MEHPA) and synergistic effect of (MEHPA) on co Extraction of Zinc and cadmium with DEHPA was investigated. It was shown that extraction of zinc and an increase of PH would increase cadmium by DEHPA and/ or MEHPA. The results also illustrate that pH0.5 of zinc by an increase in (MEHPA) from 0.1 to 8 vol% did not vary significantly while that of cadmium differs from 0,63 to 2,4. In other words, MEHPA prevents selective extraction of zinc from aqueous media including both zinc and cadmium. Studies on selective separation parameter ßZn/Cd show that it was reduced 50 to 13 times through an increase in MEHPA from 0.1 to 8.0 vol%.
تمت دراسة استخلاص التوتياء والكادميوم في آن واحد بواسطة مزيج من ثنائي أتيل هكسيل حمض الفوسفور (DEHPA) وآحادي 2- أتيل هكسيل حمض الفوسفور (MEHPA) والفعل التآزري للحمض (MEHPA) على استخلاص عنصر التوتياء بواسطة الحمض (DEHPA).
لقد تبين أن استخلاص التوتياء والكادميوم بواسطة (DEHPA) مع/ أو بواسطة MEHPA سيزداد بزيادة الـ PH.
كما أوضحت النتائج أن استخلاص التوتياء عند PH =0,1 بازدياد MEHPA من 0.1 إلى8 بالمئة حجماً يكون غير فعال بينما يختلف عند عنصر الكادميوم من 0.63 إلى 2.4 وبتعبير آخر فإن حمض MEHPA يحول دون استخلاص التوتياء من وسطه المائي بوجوده مع عنصر الكادميوم.
إن دراسة عامل الفصل bzn/cd بينت أن قيمته تتناقض من 50 إلى 13 مرة خلال زيادة تركيز الحمض من 0.1 إلى 0.8 بالمئة حجماً.
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