The influence of different variables on the removal of copper from water using limestone filtration technology

مقدم أطروحة جامعية

Abd al-Qadir, Narmin Abd al-Wahhab

مشرف أطروحة جامعية

al-Samawi, Adnan A. Ali
Khayyun, Thair Sharif

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم هندسة البناء و الإنشاءات

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2012

الملخص الإنجليزي

The concern over increasing needs for drinking water and awareness for development of systems to improve water quality both for drinking purposes and for effluents from wastewater treatment and industrial facilities have provided incentives to develop new technologies and improve performance of existing technologies.

Adsorption technology has many advantages over other treatment methods: simple design, low investment cost, limited waste production, etc.

Synthetic water with a dosing of artificial copper solution (Cu No) was passed through a PVC column (15 cm diameter, 100 cm length) contained limestone as a filter media in three different sizes, three hydraulic rates, and three initial influent copper concentrations (7.04, 4.39, 1.72) ppm.

3 For this study, three experiments have been conducted; continues batch and field experiment.

The upflow roughing filtration is presented as a useful technique to recover heavy metals present in aqueous solutions, without the need of adding further substances.

The filtration results demonstrate that the smaller size filter media (3.75) mm gave the higher removal efficiency (93.75 – 98.80) % than larger filter media (9.50) mm which gave removal efficiency of (67.61 – 94.0) % which is due to large specific surface.

The smaller size of limestone achieved the longer detention time (49) min, so the removal of copper was more than (90) % for the (50) min of experiment.

At lower flow rate (0.16) L/min, the removal efficiency was higher than at higher flow rate (0.77) L/min.

At high flows, there is a reduced period of surface contact between the particles and copper solution.

The influent pH was set constant at (7.7) for all experiments.

The average pH of effluent increased by a range from (7.83) to (8.04) for different copper concentrations, this is due to the presence of COin limestone and the amount of limestone was increased further.

3 This study also involved three different batches of experiments.

Each experiment used different sizes of limestone media (3.75, 5.00 and 9.50) mm, five different weight of limestone (20, 60, 100, 140 and 180) g shaken with copper solutions at various concentrations for each size to see the removal behavior for copper.

Batch study has indicated that more than (90) % copper (Cu) with concentration up to (40) mg/l could be removed from the solution with limestone quantity (180) g.

The removal efficiency range (93 - 97) % for the three types of limestone which indicates the importance of limestone media in the removal process.

This indicates that the removal efficiency was increased with the increase of the amount of limestone.

Field experiment has been conducted using wastewater from Al- Dura Electric Station on the three types of limestone so that to ensure the laboratory tests.

It was achieved good removal efficiency range from (87.5) % to (97.5) % at the high adsorbent dose.

To calibrate the physical model, a computer program of multiple regressions is used to assess the relative importance of predictor variables.

The partial correlations indicate that influent concentration of copper, surface loading (flow rate), and detention time are the most important variables while the size of limestone is not important as the others.

التخصصات الرئيسية

العلوم الهندسية والتكنولوجية (متداخلة التخصصات)

الموضوعات

• المياه

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-419588