Arsenic removal from drinking water by electrocoagulation using iron electrodes

Uçar, Ceren; Baskan, Meltem Bilici; Pala, Ayşegül

doi:10.1007/s11814-013-0128-2

Cited by 27 publications

(10 citation statements)

References 45 publications

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“…The EC process is regarded as a very efficient method for removing various water contaminants (Nidheesh and Singh, 2017). The removal of As from water by the EC process was reported by several authors (Ucar et al, 2013;Vasudevan et al, 2010). Biochar can be applied for carbon sequestration, soil amendment, waste management, wastewater treatment, groundwater remediation, and greenhouse gas emission minimization (Qambrani et al, 2017).…”

Section: Removal Methodsmentioning

confidence: 99%

Arsenik Kirliliği Bakımından Harran Ovası Yeraltı Sularının Değerlendirilmesi

Yapıcıoğlu

Derin²,

Yeşilnacar³

2020

Türkiye Jeoloji Bülteni / Geological Bulletin of Turkey

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Arsenic (As) contamination in water, especially in groundwater, has led to major health problems. Due to the recognition that As at low concentrations in potable water causes crucial health effects, As removal methods have gained significant importance in recent years. In this study, As concentration was monitored in October and March in ten observation wells located in Harran Plain, which has the largest groundwater reserves in the Middle East. The main aim of this study is to select the proper treatment method for remediation of a groundwater resource polluted with As. According to the analyses, there was no well that exceeded the limit for As concentration (10 ppb). The results revealed that As concentrations in October were lower than in March. In March, the highest As concentration was observed in Yaygılı well with the value of 4.12 ppb. Ozanlar well had the lowest As concentration with the value of <0.5 ppb. In October, the highest As concentration was 2.39 ppb in Çamlıdere well. For Çamlıdere and Yaygılı wells, As removal methods (coagulation and flocculation, adsorption, membrane processes, advanced oxidation processes, electrocoagulation, biochar) were investigated and discussed. As a result of the assessment, it was estimated that the best available As removal method could be biochar application considering its advantages.

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Section: Removal Methodsmentioning

confidence: 99%

Arsenik Kirliliği Bakımından Harran Ovası Yeraltı Sularının Değerlendirilmesi

Yapıcıoğlu

Derin²,

Yeşilnacar³

2020

Türkiye Jeoloji Bülteni / Geological Bulletin of Turkey

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“…Эдгээрээс электрокоагуляцийн арга нь хэрэглэгдэх тоног төхөөрөмж энгийн, процессын туршид коагулянт нь анодын уусалтаар тасралтгүй үүсдэг, химийн нэмэлт бодис шаардахгүй зэрэг олон давуу талуудтай учраас түгээмэл хэрэглэгддэг аргуудын нэг юм [11,12]. Электрокоагуляцийн аргаар As(V)-ыг төмөр [11][12][13][14][15], хөнгөнцагаан [1,11,15] болон магни [16] электрод хэрэглэн үйлдвэрийн бохир ус [17], гүний ус [1,15], ус дамжуулах хоолойн ус [18], ундны ус [11,12,13,14], зохиомол усан орчин [19]-оос тунадасжуулах явцад нөлөөлөх хүчин зүйлсийн зохистой утгыг тодорхойлох олон ажлууд хийгдсэн байдаг. Б.Кан нарын судлаачид 6 зэрэгцээ байрлуулсан төмөр электродтой электрокоагуляцийн аргаар 50 мг/л концентрацитай арсен агуулсан зохиомол усны дээжин дэх нийт арсены зайлуулалт нь pH=4, гүйдлийн нягт 0.54 мА/см 2 үед 30 минут явуулахад хамгийн их буюу 99.5%, энергийн зарцуулалт нь 0.165 кВт×цаг/м 3 байв.…”

Section: оршилunclassified

“…Тогтоосон нөхцөлд арсены концентраци 0.05 мг/л-аас 0.5 мг/л болж ихсэхэд зайлуулалт 95% -84% байв. Харин нэмэлт электролит болох NaCl-ын концентраци нь арсены зайлуулалтад нөлөөлөхгүй, зөвхөн гүйдлийн нягтад нөлөөлнө гэж үзсэн [13]. Харин 2019 онд Д.Дейзи нарын судлаачид цэвэр ус дамжуулах хоолойн уснаас 0.1 мг/л концентрацитай As(V)-ыг төмөр электродтой электрокоагуляцийн аргаар 99.4%-тай зайлуулсан бөгөөд зохистой нөхцөлийг рН=7, гүйдлийн нягт 0.431 мА/см 2 , NaCl-ын концентраци 0.33 г/л, 30 минут гэж тодорхойлсон байдаг [18]…”

Section: оршилunclassified

Optimization of electrocoagulation condition for the removal of As(V) ions from aqueous media

Davaasambuu

Nomin-Erdene

2021

Himi, him. tehnol. hùrèèlèngijn èrdèm šinžilgèènij bùtèèl

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In recent years, the arsenic content of groundwater and soil due to the mining processes and natural and/or anthropogenic sources exceeds the permissible level, leading to adverse effects on human health and the ecosystem. The paper provides the optimized condition for the arsenic removal from the aqueous media using electrocoagulation, which is no additional reagents/chemicals, in situ generation of coagulants continuously, low energy consumption. The optimal conditions were found to be as follows: pH 7, electrolyte concentration NaCl 0.5 g L-1, current density 20 mA cm-2, and operational time 20 minutes, initial concentration of arsenic 50 mg L-1. Under the optimal condition, the maximum removal efficiency was 99.6%. Generally, the experimental results showed that the removal efficiency of As(V) from the aqueous medium was higher than 95% at pH = 4-8 ranges, 90% at the electrolyte concentration in the range of 0.25 g L-1 to 0.75 g L-1 , and 96% at the current density in the range of 15 mA cm-2 - 60 mA cm-2 respectively. Considering the variation of oxidation-reduction potential and pH during the electrocoagulation and FTIR spectra of solid residue, we found that As(V) was removed through the chemical precipitation (FeAsO4) and adsorption (Fe(OH)3×HAsO42-). Усан орчноос As(V) ионы агуулгыг бууруулах электрокоагуляцийн зохистой нөхцөлийг тогтоох судалгаа Хураангуй: Сүүлийн жилүүдэд эрдэс түүхий эдийн олборлолт, арсен агуулсан эрдэс чулуулгийн өгөршилөөр гадаргын болон гүний усан дахь арсены (As) агуулга хүлцэх агууламжаас ихсэх тохиолдлууд гарч байна. Энэ судалгааны ажлаар коагулянтаа орчинд нь тасралтгүй үүсгэдэг, нэмэлт урвалж шаарддаггүй, цахилгааны зарцуулалт багатай электрокоагуляцийн аргаар усан уусмал дахь As(V)-ыг тунадасжуулах зохистой нөхцөлийг тогтоох ажлыг хийж, үр дүнг спектрофотометр, индукцийн холбоост плазм-масс спектрометр, потенциометрийн аргаар тодорхойллоо. Зохистой нөхцөлийг тодорхойлох туршилтын дүнгээс харахад, усан орчноос As(V)-ын тунадасжуулалт рН=4-8-ын утганд >95%, электролитын концентрацийн 0.25 – 0.75 г/л мужид >90%, гүйдлийн нягтын 15 – 60 мА/см2 мужид >96% бүтээмжтэй байв. Уусмалын рН ~7, NaCl-ын концентраци 0.5 г/л, гүйдлийн нягт 20 мА/см2 үед 50 мг/л концентрацитай As(V)-ын зайлуулалт хамгийн их буюу 99.6% нь усан орчноос тунадасжиж байлаа. Исэлдэх ангижрах потенциал, рН-ын хугацаанаас хамаарах хамаарал, үүссэн тунадсын нил улаан туяаны спектрийн шинжилгээний үр дүнгээр, электрокоагуляциар As(V)-ын зайлуулалт нь химийн тунадасжилт (FeAsO4), адсорбц (Fe(OH)3×HAsO42-)-ийн процессоор явагддагийг тогтоолоо. Түлхүүр үг: төмөр электрод, коагулянт, адсорбц, арсенат ион

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“…Thus, agglomerate small particles to bigger flocs is needed so they can be removed by sedimentation [13]. Recently, electrocoagulation is having a noticeable role in the treatment of water since it offers several important benefits, for example easiness in operation, no addition of chemicals, quite compactness, and less sludge production [18]. Electrocoagulation process include the producing of aluminum or iron hydroxides flocs in the solution.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Process of Electrochemistry with Magnetite Nanoparticles for Treatment of Turbid Water

Mohammed

Al-Zuheri

2019

JAARU

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Magnetic nanoparticles are now being investigated widely in field of water treatment. The aim of this study was to evaluate the feasibility of electrocoagulation process combined with addition of magnetite nanoparticles as a turbidity removal process. Bentonite was used as source of turbidity for the synthetic turbid water. Experiments were conducted in a bench scales electrocoagulation reactor where voltage was applied across a perforated plate of aluminum as anode, and iron mesh as cathode. Commercial grade of magnetite (Fe3O4) with an average nanoparticle size of 50 nm was used. The effect of some factors such as initial pH of the solution (5-9), current density (5-25 mA/cm2), and magnetite dosage (0.4-2.5 gm) on the efficiency of the process were studied. The residual turbidity obtained by using electrocoagulation process alone was (7.47 NTU) from initial turbidity of (200 NU) at constant conditions of pH 6, current density 15 mA/cm2 and electrolysis time 20 min. While under these same conditions the combined electrocoagulation + magnetite process with the added (1.4 gm) of magnetite and under the same operating conditions the residual turbidity was (4.34 NTU), which indicate that the magnetite nanoparticles enhanced the electrocoagulation process.

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Arsenic removal from drinking water by electrocoagulation using iron electrodes

Cited by 27 publications

References 45 publications

Arsenik Kirliliği Bakımından Harran Ovası Yeraltı Sularının Değerlendirilmesi

Arsenik Kirliliği Bakımından Harran Ovası Yeraltı Sularının Değerlendirilmesi

Optimization of electrocoagulation condition for the removal of As(V) ions from aqueous media

Hybrid Process of Electrochemistry with Magnetite Nanoparticles for Treatment of Turbid Water

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