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Contribution to the study of the possibility of using natural zeolite in the ramoval of lead ions from aqueous solutions

مساهمة في دراسة إمكانية استخدام الزيوليت الطبيعي في إزالة أيونات الرصاص من المحاليل المائية

1471   1   53   0 ( 0 )
 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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studied the elimination of lead using natural zeolite by studding the the best conditions to removal lead in a system with two phase: liquid (contaminated water with lead)-solid (natural zeolite), correlation of the following factors: time of mixing phase, granular size of solid phase, change of pH values, concentration of the calcium element as a competitor element for the available sites for occupation on the solid phase, the ratio V/m represents the size of the aqueous phase to the mass of the solid phase and concentration of lead element. On the other hand, the possibility of using natural zeolite as a template for storaging dangerous materials such as lead, has been studied by changing water quality, pH and temperature. The results of this research show that and under the following experimental conditions: time of mixing=4hour, mix of granular size of solid phase, pH< 8, concentration of calcium = 20 ppm,V/m=100 and concentration of lead = 1000 ppm , the rate of lead removal range from 60% to 99%. On the other hand, the results of this research show that changing water quality has no impact on the ability of natural zeolite for storaging lead as a hazardous waste, while pH changes have minor effects on this ability of retention and an effect for the high temperatures on the template was also observed.


Artificial intelligence review:
Research summary
تدرس هذه الورقة البحثية إمكانية استخدام الزيوليت الطبيعي لإزالة أيونات الرصاص من المحاليل المائية. يتم ذلك من خلال نظام ذو طورين: سائل (مياه ملوثة بالرصاص) وصلب (زيوليت طبيعي). تم تحليل تأثير عدة عوامل على كفاءة الإزالة، مثل زمن الخلط، الحجم الحبيبي للزيوليت، درجة الحموضة (pH)، تركيز الكالسيوم كعنصر منافس، نسبة حجم الطور المائي إلى كتلة الطور الصلب (V/m)، وتركيز الرصاص. أظهرت النتائج أن أفضل شروط لإزالة الرصاص هي زمن خلط 4 ساعات، خليط من الحجوم الحبيبية، درجة pH أقل من 8، نسبة V/m تساوي 100، تركيز الكالسيوم 20 ppm، وتركيز الرصاص 1000 ppm، حيث تراوحت نسبة الإزالة بين 60% و99%. كما تبين أن نوعية المياه لا تؤثر على قدرة الزيوليت على الاحتفاظ بالرصاص، بينما تؤثر درجات الحموضة والحرارة بشكل طفيف على هذه القدرة.
Critical review
دراسة نقدية: تقدم هذه الدراسة مساهمة قيمة في مجال معالجة المياه الملوثة بالرصاص باستخدام الزيوليت الطبيعي. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، لم يتم التطرق بشكل كافٍ إلى التكلفة الاقتصادية لتطبيق هذه التقنية على نطاق واسع. ثانياً، الدراسة تركز بشكل كبير على الظروف المثلى في المختبر، ولكن قد تختلف النتائج في الظروف البيئية الحقيقية. ثالثاً، لم يتم مناقشة التأثيرات البيئية المحتملة لاستخدام الزيوليت المحمل بالرصاص بعد انتهاء دورة حياته. وأخيراً، يمكن أن تكون هناك حاجة لمزيد من الدراسات حول تأثير العناصر الأخرى الموجودة في المياه الملوثة على كفاءة الإزالة.
Questions related to the research
  1. ما هي العوامل التي تمت دراستها لتحديد كفاءة إزالة الرصاص باستخدام الزيوليت الطبيعي؟

    تمت دراسة عدة عوامل تشمل زمن خلط الطورين، الحجم الحبيبي للزيوليت، درجة الحموضة (pH)، تركيز الكالسيوم كعنصر منافس، نسبة حجم الطور المائي إلى كتلة الطور الصلب (V/m)، وتركيز الرصاص.

  2. ما هي أفضل الشروط التجريبية لإزالة الرصاص كما وردت في الدراسة؟

    أفضل الشروط التجريبية هي زمن خلط 4 ساعات، خليط من الحجوم الحبيبية، درجة pH أقل من 8، نسبة V/m تساوي 100، تركيز الكالسيوم 20 ppm، وتركيز الرصاص 1000 ppm.

  3. هل تؤثر نوعية المياه على قدرة الزيوليت على الاحتفاظ بالرصاص؟

    لا، نوعية المياه لا تؤثر على قدرة الزيوليت الطبيعي على الاحتفاظ بالرصاص كنفاية خطرة.

  4. ما هو التأثير الذي تتركه درجة الحرارة على قدرة الزيوليت المحمل بالرصاص؟

    درجات الحرارة المرتفعة تؤثر على قدرة الزيوليت المحمل بالرصاص، حيث تؤدي إلى انتقال الرصاص من الطور الصلب إلى الطور المائي.


References used
AUBERT ,J. E.; HUSSON ,B.; SARRAMONEN.,F. Utilization of municipal solid waste incineration (MSWI) fly ash in bended cement. S. Of Hazard Materials, 2006,624 -631
JARUP.L. Hazards of heavy metals contamination. Department of epidemiology and public health , imperial college, London ,UK
JAISHANKAR, M.; TSETEN,T.; ANBALAGAN, N.; MATHEW, B.; BEEREGOWDA , K. Toxicity, mechanism and health effects of some heavy metals . Department of biotechnology, sapthagiri college of engineering, Bangalore-57, Karnataka,India,2014
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