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    Contribution to the characterization of pyrite ore in Tartous Governorate, and a study of some factors affecting its dissolution

    مساهمة في توصيف خام البيريت في محافظة طرطوس ودراسة بعض العوامل المؤثرة على إنحلاليته

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     Added by Tishreen University ورقة بحثية
     Publication date 2020
      fields Chemistry
    and research's language is العربية
     Created by Ali Zhairy


    ‎Shamra Academia - شمرا أكاديميا‎


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    Abstract in Arabic Abstract in English

    In this research, the natural pyrite ore found in Tartous Governorate was described by studying the two samples taken from Hosn Suleiman -Safita (A) and Al Qadmous (B) area, in addition to studying the optimum conditions for pyrite dissolution (pH - time - quantity) with aerobic conditions. The results of X-ray diffraction (XRD) showed that the sample (A) is mainly composed of pyrite mineral and does not contain impurities, while sample (B) is composed of pyrite mineral combined with a small amount of calcite mineral, and these results were confirmed by the result of (FTIR) infrared spectroscopy and Polarised light microscopy (PLM(. The iron percentage in the two samples (A,B) is ranged between (42.6 – 43 %) and the sulfur percentage is between (40 – 53.7 %). With regard to pyrite dissolution, the results showed that pyrite taken from Hosn Suleiman (A) begins to dissolve at pH values less than 4.5, and the contact time is about 6 hours. By Comparing the results of sample (A) with sample (B), we found that the dissolution of sample (A) was about three times less than the dissolution of sample (B), and this is due to the fact that sample (A) contains pure and well crystallized pyrite ore while sample (B) contains pyrite combind with calcite, which increases its solubility.

    Artificial intelligence review:
    Research summary
    تناول البحث توصيف خام البيريت الطبيعي في محافظة طرطوس من خلال دراسة عينتين مأخوذتين من موقع حصن سليمان في صافيتا (A) ومنطقة القدموس (B). تم تحليل العينتين باستخدام تقنيات متعددة مثل إنعراج الأشعة السينية (XRD)، مطيافية الأشعة تحت الحمراء (FTIR)، والمجهر الاستقطابي (PLM). أظهرت النتائج أن العينة (A) تتكون بشكل رئيسي من فلز البيريت النقي، بينما العينة (B) تحتوي على البيريت المترافق مع الكالسيت. تراوحت نسبة الحديد في العينتين بين 42.6% و43%، ونسبة الكبريت بين 40% و53.7%. بالنسبة لانحلالية البيريت، أظهرت النتائج أن البيريت من حصن سليمان (A) يبدأ بالانحلال عند قيم pH أقل من 4.5 وزمن التماس حوالي 6 ساعات. كانت انحلالية العينة (A) أقل بثلاث مرات من العينة (B) بسبب نقاوة البيريت في العينة (A) ووجود الكالسيت في العينة (B) الذي يزيد من سرعة انحلاليتها. خلص البحث إلى أن البيريت في حصن سليمان نقي ومتبلور بشكل جيد، بينما البيريت في القدموس غير نقي ومترافق مع الكالسيت.
    Critical review
    دراسة نقدية: يعتبر البحث ذو أهمية كبيرة في توصيف خام البيريت الطبيعي في سورية، وهو موضوع لم يتم دراسته بشكل موسع سابقاً. ومع ذلك، يمكن الإشارة إلى بعض النقاط التي قد تحتاج إلى تحسين. أولاً، كان من الممكن أن تكون الدراسة أكثر شمولية إذا تم تضمين عينات من مواقع أخرى في سورية لتحليل تنوع خام البيريت بشكل أوسع. ثانياً، لم يتم التطرق بشكل كافٍ إلى التطبيقات العملية للنتائج وكيف يمكن استغلالها في الصناعات المختلفة. أخيراً، كان من الممكن أن تكون الدراسة أكثر تفصيلاً في تحليل تأثير الشوائب الأخرى الموجودة في العينات على انحلالية البيريت.
    Questions related to the research
    1. ما هي المواقع التي تم أخذ عينات البيريت منها في محافظة طرطوس؟

      تم أخذ عينات البيريت من موقع حصن سليمان في صافيتا ومنطقة القدموس.

    2. ما هي التقنيات المستخدمة في تحليل العينات؟

      تم استخدام تقنيات إنعراج الأشعة السينية (XRD)، مطيافية الأشعة تحت الحمراء (FTIR)، والمجهر الاستقطابي (PLM).

    3. ما هي نسبة الحديد والكبريت في العينتين المدروستين؟

      تراوحت نسبة الحديد بين 42.6% و43%، ونسبة الكبريت بين 40% و53.7%.

    4. ما هو الفرق بين انحلالية البيريت في العينة (A) والعينة (B)؟

      كانت انحلالية العينة (A) أقل بثلاث مرات من العينة (B) بسبب نقاوة البيريت في العينة (A) ووجود الكالسيت في العينة (B) الذي يزيد من سرعة انحلاليتها.

    Keywords
    البيريت طرطوس إنحلالية XRD FTIR PLM الكالسيت خصائص كيميائية خصائص تركيبية
    References used
    HORN,Y.S;HORN,Q.C.Chemical,structural and electrochemical comparison of natural and synthetic FeS2 pyrite in lithium cells.Electrochimica Acta U.S.A,46,2001,2613-2621.
    DESCOSTES,M;VITORGE.P;BEAUCAIRE.C.Pyrite dissolution in acidic media. Geochimica et Cosmochimica Acta U.S.A,Vol.68,No.22,2004,4559-4569.
    USTUNDAG,Z;USTANDAG,I;KADIOGLU,Y.K.Multi-element analysis of pyrite ores using polarized energy-dispersive X-ray fluorescence spectrometry.Applied Radiation and Isotopes turkey,2007,809-813.
    RICKARD,D;LUTHER,G.W.Chemistry of Iron Sulfides.Chemical Reviews UK,Vol.107,No.2,2007,514-562.
    KHABBAZ,M;ENTEZARI.M.H.Simple and versatile one-step synthesis of FeS2 nanoparticles by ultrasonic irradiation.Journal of Colloid and Interface Science Iran, 420,2016,204-210.
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