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Register a new userUsing Electrocoagulation in Seawater Desalination System
استخدام التخثير الكهربائي في منظومة تحلية مياه البحر
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تعد مشكلة شُح المياه العذبة من أهم العقبات التي تواجه استراتيجيات التطوير الزراعي و الصناعي عربياً و عالمياً، حيث يمتَّد وطننا العربي على مساحات واسعة جافة و شبه جافة، و يفتقر في معظمه إلى مصادر المياه العذبة، لذلك فقد أصبح اللجوء إلى خَيار إزالة ملوحة مياه البحر (التحلية) أمراً حتمياً لسد العجز المائي، خاصةً بوجود الشريط الساحلي الممتد على طول معظم البلدان العربية، فمياه البحر المحلاة تعد مصدراً متجدداً للمياه العذبة.
Fresh water shortage problem is the most important difficulty that counters agricultural and industrial improvement strategies on both Arabic and international levels, where Arabian region extends along vast arid and semi- arid areas, and mostly lacks for fresh water resources. Therefore, desalination choice has become an inevitable option to compesate deficiency of water, especially with the long Arabian costal line, where desalinated seawater is considered renewable fresh water resource. However, desalination mechanism requires water pretreatment procedures in order to reduce total hardness and pH values, to prevent salts precipitations which hinder thermal and membrane techniques.
References used
AkILI D. KHAWAJI.; IBRAHIM K. KUTUBKHANAH.; JONG-MIHN WIE., 2008– Advances in seawater desalination technologies – Desalination, 221,47 – 69
YOUNG M. KIM.; SEUNG J. KIM.; YONG S. KIM.; SANGHO LEE.; In S. KIM.; JOON HA KIM., 2009– Overview of systems engineering approaches for a large-scale seawater desalination plant with a reverse osmosis network – Desalination, 238,312-332
LAUREN F. GREENLEE, DESMOND F. LAWLER, BENNY D. FREEMAN, BENOIT MARROT, PHILIPPE MOULIN – 2009 - Reverse osmosis desalination: Water sources, technology, and today’s challenges – water research – 4 3 – 2317 – 2348
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The aim of this study is to investigate the performance of batch electro coagulation (EC) using iron electrodes with bipolar configuration for simultaneous removal of chromium (Cr3+) from synthetic wastewater. The influences of current density (from
2 to 25 mA/cm2), initial metal concentration (from 100 to 250 mg/L) and supporting electrolyte (0-12 mmol/L Na2SO4) on removal efficiency are explored in a batch stirred cell to determine the best experimental conditions.
The results indicate that EC was very efficient to remove Cr3+ from the synthetic wastewater having an initial concentration of 250 mg/L of Cr3+ under the best experimental conditions. At the current density of 15 mA/cm2 with a total energy consumption of ∼18.5 kWh/m3, more
than 98.7% removal value was achieved for Cr3+ after 20 min EC treatment. Time of 20 minutes EC treatment was chosen as optimum time to gain less than 4 mg Fe/L in the treated water.
In this work, the performance of batch electrocoagulation (EC) treatment using iron electrodes with
monopolar configuration for trivalent chromium (Cr3+) removal from a synthetic wastewater was
investigated. The influences of current density (from
2 to 25 mA/cm2) and initial metal concentration
(from 50 to 250 mg/L) on the removal efficiency were explored in a batch stirred cell to determine the
best experimental conditions.
In the present work, batch electrocoagulation experiments were carried out
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electrolysis time, initi
al concentration of PAHs, electrolyte type, and electrolyte
concentration were investigated to achieve the optimal removal efficiency. The
results indicated that the electrocoagulation utilizing the aluminum, as anode
and cathode, was an efficient tool in the reduction of these contaminants. The
treatment process was found to be largely affected by the current density and
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using NaCl as an electrolyte where indirect oxidation by hypochlorite forming
later during the treatment was occurred. The results demonstrated that the
technical feasibility of the electrocoagulation as a possible and reliable
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