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Article
NICKEL IONS REMOVAL FROM AQUEOUS SOLUTIONS USING SAWDUST AS ADSORBENT: EQUILIBRIUM, KINETIC AND THERMODYNAMIC STUDIES
إزالة أيونات النيكل من المحاليل المائية بإســتعمال نشارة الخشــب كوسـط ماز: دراسة الأتزان، الديناميكية الحركية والثرموداينمك

Author: Lahieb Faisal Muhaisen
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2017 Volume: 21 Issue: 3 Pages: 60-71
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

This work is concentrate on removal of some environmentally relevant contaminants, such as nickel ions from simulated wastewater by sawdust low- cost natural sorbents. Sorption batch tests were investigated in the removal process at initial concentration of nickel ions (100 mg/l).Equilibrium, kinetics and thermodynamic studies were investigated for the removal process. Parameters affect as pH, amount of sawdust, contact time and temperature were studied. The uptake capacity was 12.5 mg/g; also FTIR demonstrated that carboxyl and hydroxyl groups were involved in the adsorption of the metal ions. The results indicated that adsorption is an endothermic process and rate of removal increased with increase temperature.

ان الهدف من هذا العمل هو التركيز على ازالة بعض الملوثات البيئية )أيونات النيكل( من مياه ملوثة مُصنعة باستعمال ممتزات واطئة الكلفة وطبيعية )نشارة الخشب(.أجريت تجارب الباج (الدفعة) لازالة تركيز 100 ملغملتر من ايونات النيكل. تمت دراسة العوامل المختلفة على عملية الأمتزاز مثل قيمة الدالة الحامضية ، كمية القشور المستعملة, زمن التماس و درجة الحرارة. نتائج فحص التحليل الكيفي اظهر المجموعات الفعالة للمركبات العضوية مثل المجموعات الكربوكسيليةوالهيدروكسيل. و كانت سعة الامتزاز 12.5 ملغمغم، وكانت نسبة الأزالة تزداد بزيادة الحرارة و ذات طابع ماص للحرارة وفقا لنتائج الحرارية.

Keywords

Ni --- II ions --- sawdust --- Equilibrium --- kinetics --- thermodynamic


Article
LEMON PEEL AS NATURAL BIOSORBENT TO REMOVE PHOSPHATE FROM SIMULATED WASTEWATER
قشور الليمون كوسط طبيعي ماز لأزالة الفوسفات من المياه الملوثة المُصنعة

Author: Lahieb Faisal Muhaisen
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2016 Volume: 20 Issue: 2 Pages: 163-173
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Lemon peel, a discarded agro-waste, was used as a biosorbent for removal of phosphate from simulated wastewater by sorption process. The characteristics of this adsorbent were tested by using FTIR in order to study the chemical compounds and oxidizing compounds, also to know the functional groups of organic compounds such as amino groups, carboxyl, hydroxyl and carbonyl. The influence of various practical factors such as pH; adsorbent dosage, contact time, initial concentrations of phosphate and temperature have been investigated through a set of batch experiments on the removal process efficiency. Equilibrium isotherm and kinetic study models of phosphate sorption onto adsorbents were also studied, Langmuir isotherm was found to be the appropriate equation and a second-order kinetic model was used to calculate the kinetic constants of inclusive adsorption rate. The results indicated that adsorption is an endothermic process for phosphate removal.

أجري هذا البحث لدراسة إمكانية استخدام قشور الفاكهة كوسط ماز لإزالة الفوسفات من المياه الملوثة. و تم اختيار قشرة ثمرة الليمون كوسط طبيعي لأمتزاز الفوسفات من مياه الصرف الصحي المحاكاة، و قد تم أولا اجراء فحص التحليل الكيفي لقشرة ثمرة الليمون باستخدام جهاز الأشعة تحت الحمراء لغرض دراسة المركبات الكيميائية و المركبات المؤكسدة و معرفة المجموعات الفعالة للمركبات العضوية مثل المجموعات الأمينية، الكربوكسيلية، الهيدروكسيل و الكربونيل. كم تمت دراسة العوامل المؤثرة على عملية الأمتزاز مثل قيمة الدالة الحامضية ، كمية القشور المستعملة, زمن التماس بين المادة الممتزة و السطح الماز, التركيز الأولي للعناصر الملوثة و تأثير تغير درجة الحرارة. تم تحليل البيانات الناتجة من عملية الأمتزاز بواسطة موديلات لانكمير و فريندلج و اختبار البيانات الحركية من الدرجة الاولى و الثانية و قد أظهرت النتائج أن موديل لانكمير هو المفضل أكثر و ملائمتها مع الدرجة الثانية. وكانت نسبة الأزالة تزداد بزيادة الحرارة و ذات طابع ماص للحرارة وفقا لنتائج الحرارية.


Article
PREPARING OF EGG SHELLS ADSORBENT FOR REMOVING RED REACTIVE DYE FROM WASTEWATER

Author: Lahieb Faisal Muhaisen
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2018 Volume: 22 Issue: 2 (Part-1) Pages: 46-55
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

In this study, egg-shells were prepared as an adsorbent for the removal of red reactive (RR)dye from simulated aqueous solution by sorbent process. All parameters as; pH; dosage of egg-shells (sorbent), contact time, initial concentration of RR dye was effective on the removal efficiency of the dye. From this search it was found that Freundlich isotherm fitted well to the sorption data. Maximum removal was observed at above pH 6.0. The efficiency of egg shells for the removal of RR dyes was 91.78%. Also the kinetic-study was in good-concordance with pseudo-second-order-model. The results appeared that RR dyes is considerably adsorbed on egg shells and it could be and economic method for the removal of RR dyes from aqueous solutions

Keywords

Egg-shells --- RR dye --- kinetic --- isotherm --- Sorption


Article
EGG SHELL AS NATURAL SORBENT TO REMOVE CADMIUM IONS FROM SIMULATED WASTEWATER

Authors: Lahieb Faisal Muhaisen --- Farah Faisal Muhaisen --- Zainab Munaf Abdulkareem
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2019 Volume: 23 Issue: 6 Pages: 167-177
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

This search offers the ability of use a natural waste as a biosorbent such as egg shells and their efficiency on heavy metals adsorption, like cadmium. Maximum removal was observed at pH 6.0. The efficiency of egg shells for the removal of cadmium was 89.7% at 5g adsorbent dose. Effect of temperature change has been calculated; and parameters of thermodynamic indicated that the sorption of cadmium is favored at high temperatures and endothermic. FTIR was recorded before and after adsorption to show the number and position of the functional groups available for cadmium binding on to the studied adsorbent. It was found that Freundlich isotherm fitted well to the data; Pseudo-second order model explains the cadmium kinetics more effectively. The results appeared that cadmium is considerably adsorbed on egg shells and it could be and economic method for the removal of cadmium from aqueous solutions.

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