Removal of Residual Pollutants of Treated Wastewater Using Agricultural Waste

الموضوعات

علوم بيئية

الملخص

Pollution of the water with toxic heavy metals has been widespread and often causes lost of huge quantities of water as wastewater. Several techniques have been used for the removal of these metals. However, most of conventional methods are either ineffective or noneconomic, especially when used for the reduction of heavy metal ions at low concentrations. In recent years, the need for efficient and economical methods for the elimination of heavy metals from contaminated wastewaters has necessitated research interest toward the production of low cost alternatives to commercially available adsorption materials. Therefore, there is an urgent need that all possible sources of inexpensive adsorbents to be explored and their feasibility for the removal of heavy metals should be studied in detail. The objective of this research is to study the utilization possibilities of inexpensive adsorbents for the elimination of heavy metals from wastewater. Agricultural waste by-products such as Tomato and Eggplants leaves have been used for the elimination of heavy metals from synthetic wastewater. In the scope of this study, biosorption of heavy metals Co(II), Cu(II), Fe(II), Ni(II), Pb(II) and Zn(II) using both biosorbents was studied. Parameters affecting the biosorption process like pH, particle size, metal ion concentration, agitation time and biosorbent dose have been investigated.Batch experiments were carried out using the two biosorbents. Initial and final concentrations of metal were measured using Inductively Coupled Plasma (ICP) and Spectrophotometry method. The effect of pH on biosorption by Tomato and Eggplant Leaves was studied by varying the pH of solution from 2 to 10. The result showed the optimum pH for the removal of Co(II), Cu(II), Fe(II), Ni(II), Pb(II) and Zn(II) was at pH 6.0 except for Cu(II) it was pH 4.0 with maximum removal percentages of 46.73%, 99.55%. 94.91%, 44.57%, 99.56% and 88.21% respectively when using Tomato leaves. By using Eggplant Leaves, the optimum pH value was 6.0 for all metals with maximum removal of 73.85%, 97.73%, 98.94%, 65.68%, 97.49% and 85.72%, respectively.Biosorbents particle size was in the range from 212 to 600 µm in which 212 µm particle size was found the optimum and used for further experiments. Metal ion concentration was in the range of 1-3 mg/L and the lower concentration of 1 mg/L gave the maximum removal for all heavy metals under study. In order to understand the behavior of the biosorption process with change in contact time and biosorbent dose; Iron metal was chosen as a model. The effect of time on the process of biosorption, the agitation period was varied from 0 to 120 min. The results of contact time showed that with time elapse the removal efficiency increase till equilibrium time achieved with maximum removal 94.95% for Tomato Leaves and 98.90% for Eggplant Leaves which obtained after 60 minutes of contact time. The variation in biosorbent dose was studied using biosorbent dose ranging from 20 to 120 mg. Results illustrate that with increase in biosorbent dose the removal increase until point of equilibrium reached beyond any increase in dose will not cause change in removal capacity. Maximum removal efficiency occurred at 60 mg of biosorbent dose for both biosorbents with removal efficiency 95.34% and 99.18%, for Tomato and Eggplant Leaves respectively. Maximum biosorption efficiency was observed in the order of Pb(II) > Cu(II) > Fe(II) > Zn(II) > Co(II) > Ni(II) by leaves of Tomato, while the biosorption capacity by using Eggplant Leaves took the order of Fe(II) > Cu(II) > Pb(II) > Zn(II) > Co(II) > Ni(II).High adsorption capacity of the tested heavy metals even at low concentrations range of 1-3 mg/l makes Tomato and Eggplant Leaves preferable and very attractive alternative adsorption material. This field may be therefore utilized by developing countries to remove or at least alleviate the impacts of contaminated

روابط وملفات

التعريف والنوع

رقم الوثيقة

0a32b036-0302-478e-9239-06464df9be05

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

2103354_1.pdf

بيانات النشر

ترجمة العنوان

إزالة الملوثات المتبقية من المياه العادمة المعالجة باستخدام المخلفات الزراعية

ألقاب المؤلفين

[{"name_ar":" Jamal M. Safi","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Ahmed Fakhry Salama Alnabriss","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"Hassan M. Tamous","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Khamis M. AL-Mahallawi","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Removal of Residual Pollutants of Treated Wastewater Using Agricultural Waste

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

Jamal M. Safi, Hassan M. Tamous, Khamis M. AL-Mahallawi

الإعداد

Ahmed Fakhry Salama Alnabriss

الاقتباسات الببليوغرافية