Arsenic and iron removal from groundwater by oxidation–coagulation at optimized pH: Laboratory and field studies

Bordoloi, Shreemoyee; Nath, S. K.; Gogoi, Sweety; Dutta, Robin K.

doi:10.1016/j.jhazmat.2013.06.017

Cited by 119 publications

(51 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cake layer formed mainly because of precipitation of Fe(OH) 3 and MnO 2 as explained in the earlier section. Bordoloi et al [21] reported that the SEM image with EDS analysis of arsenic (As) and iron (Fe) removal from groundwater by oxidation-coagulation at optimized pH revealed that the sorption of As onto the poorly crystalline precipitate of Fe(OH) 3 and existence of a small amount of MnO 2 . The FESEM images of the precipitate obtained in the presence of Fe and Mn for filtration by both PA-NF and PA-UF membranes at adjusted pH of feed solutions are depicted in Figure 5 …”

Section: Surface Morphology Analysismentioning

confidence: 99%

IRON AND MANGANESE REMOVAL BY NANOFILTRATION AND ULTRAFILTRATION MEMBRANES: INFLUENCE OF pH ADJUSTMENT

Kasim

Mohammad²,

Abdullah³

2017

MJAS

View full text Add to dashboard Cite

Iron and manganese present naturally in groundwater. Both metallic ions at excessive amounts normally contribute to rusty taste and reddish color to the water. Membrane technology may improve the conventional groundwater treatment method which commonly requires a large area and a lot of manpower. The present experimental work focused on membrane filtration of iron and manganese in order to study the influence of pH adjustment to the prepared artificial groundwater based on the permeate quality and membrane performances. In this study, two commercially available polyamide nanofiltration and ultrafiltration membranes (PA-NF, PA-UF) were tested to examine their capabilities in treating groundwater for drinking water resources. In order to achieve WHO drinking water standard, permeate quality of the artificial groundwater is considered satisfy if concentration of iron and manganese has reached 0.3 and 0.1 mg/L, respectively. Experimental results showed that pH at a range of 3-11 have significantly improved membrane performance in terms of their rejection. Rejection of iron at a feed concentration of 100 mg/L increased as pH of the feed solution increased for all tested membranes. However, the manganese rejection with a feed concentration at 50 mg/L showed various pattern of performance for each membrane. The pH of feed solution played an important role in changing the membrane surface properties and also, the characteristic of solute. This concludes that solutemembrane interaction mechanism has improved the performance of the tested membranes. Keywords: iron rejection, manganese rejection, artificial groundwater, pH adjustment, drinking water AbstrakBesi dan mangan wujud semulajadi di dalam air bawah tanah. Kedua-dua ion logam ini pada jumlah yang berlebihan menyumbang kepada rasa berkarat dan warna yang kemerahan pada air. Kajian ini memberi tumpuan kepada penurasan logam besi dan mangan oleh membran dengan tujuan untuk mengkaji kesan pelarasan pH terhadap air bawah tanah buatan berdasarkan kepada kualiti telapan dan prestasi membran. Dalam ujikaji ini, dua membran poliamida penurasan-nano dan penurasan-ultra (PA-NF, PA-UF) yang boleh didapati secara komersial telah diuji untuk mengkaji keupayaan dalam merawat air bawah tanah sebagai sumber air minuman. Untuk mencapai piawaian WHO bagi air minuman, kualiti telapan air bawah tanah buatan dianggap memuaskan jika kepekatan besi dan mangan masing-masing mencapai 0.3 dan 0.1 mg/L. Keputusan ujikaji menunjukkan bahawa pH di antara julat 3-11 dengan ketaranya telah menambahbaik prestasi membran dari segi penyingkiran. Penyingkiran besi pada kepekatan suapan 100 mg/L telah meningkat apabila pH suapan meningkat untuk semua membran yang diuji. Walau bagaimanapun, penyingkaran mangan dengan kepekatan suapan pada 50 mg/L menunjukkan kepelbagaian corak prestasi bagi setiap membran. pH larutan suapan memainkan peranan penting dalam mengubah sifat-sifat permukaan membran

show abstract

Section: Surface Morphology Analysismentioning

confidence: 99%

IRON AND MANGANESE REMOVAL BY NANOFILTRATION AND ULTRAFILTRATION MEMBRANES: INFLUENCE OF pH ADJUSTMENT

Kasim

Mohammad²,

Abdullah³

2017

MJAS

View full text Add to dashboard Cite

show abstract

“…There are several efficient iron removal techniques, e.g., electrocoagulation (Ghosh et al, 2008), oxidation-coagulation (Bordoloi et al, 2013), solvent extraction (Quijada-Maldonado et al, 2016), microfiltration (Ellis et al, 2000), aerated granular filter (Bong-Yeon., 2005), ion exchange (Vaaramaa et al, 2003) and adsorption (Seliem et al, 2016). All of the above techniques, adsorption provides an attractive alternative treatment to other removal techniques because it is more economical and readily available.…”

Section: Introductionmentioning

confidence: 99%

Iron removal from synthetic aqueous solution using amino functionalized commercial silica gel as adsorbent

Nuengmatcha¹,

Saengsane²,

Teppaya³

et al. 2017

j.appsci

View full text Add to dashboard Cite

The amino group (-NH2) is one of the most important functional groups of ligands. Particularly, 3-aminopropyl-trimethoxysilane (APTMS) has relatively high affinity to bind various to metal ions. The present study was aimed to modify commercial silica gel (CSG) with the APTMS via silanization process to acquire amino groups (CSG-NH2) as an adsorbent for the removal of iron from synthetic aqueous solution. For an optimal adsorption study, the effects of the initial concentration of Fe(II) (1-80 mg/L), pH of solution (pH 1-10), contact time (1-36 hours) and temperature (30-60˚C) were investigated. The results showed that the adsorption capacity of the obtained CSG-NH2 for the Fe(II) was 60.80 mg/g at pH 4, and complete adsorption equilibrium was reached within 24 hrs. The adsorption isotherm of the CSG-NH2 for Fe(II) was well fitted by the Langmuir isotherm. In addition, thermodynamic data demonstrated that the Fe(II) adsorption onto the CSG-NH2 surface was mainly an exothermic spontaneous reaction. This implies that CSG-NH2 can be used as a high potential adsorbent for the removal of ferrous ion from contaminated wastewater.

show abstract

“…Variation in methyl substitution degree can lead to remarkable differences in the adsorption behavior of As onto Fe/Al oxides. Coagulation by Fe-and Al-based salts have been used as the most practical choice for As removal from drinking water [18,19]. Many studies have investigated the coagulation removal of inorganic As [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Coagulation of methylated arsenic from drinking water: Influence of methyl substitution

Chen

Liu

et al. 2015

Journal of Hazardous Materials

View full text Add to dashboard Cite

Arsenic and iron removal from groundwater by oxidation–coagulation at optimized pH: Laboratory and field studies

Cited by 119 publications

References 46 publications

IRON AND MANGANESE REMOVAL BY NANOFILTRATION AND ULTRAFILTRATION MEMBRANES: INFLUENCE OF pH ADJUSTMENT

IRON AND MANGANESE REMOVAL BY NANOFILTRATION AND ULTRAFILTRATION MEMBRANES: INFLUENCE OF pH ADJUSTMENT

Iron removal from synthetic aqueous solution using amino functionalized commercial silica gel as adsorbent

Coagulation of methylated arsenic from drinking water: Influence of methyl substitution

Contact Info

Product

Resources

About