Performance of nanofiltration for arsenic removal

Sato, Yuko; Kang, Myounggu; Kamei, Tasuku; Magara, Yasumoto

doi:10.1016/s0043-1354(02)00037-4

Cited by 184 publications

(75 citation statements)

References 5 publications

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“…Almost the same kind of difference (30% lower for arsenite) in AS(III) and As(V) removal by NF was observed by Seidel et al (2001) where up to 90% As(V) could be removed. Similar observations (75% arsenite and 95% arsenate removal) have been reported by Sato et al (2002). Shih (2005) in their literature overview of arsenic removal by pressure-driven membrane has concluded that efficiency of AS(V) removal by membranes is much higher than that of As(III) removal and that use of an oxidizing agent can substantially improve overall arsenic removal by NF.…”

Section: Membrane-based Processes For Purification Of Arsenic-contamisupporting

confidence: 83%

Contamination of groundwater by arsenic: a review of occurrence, causes, impacts, remedies and membrane-based purification

Pal¹,

Sen²,

Manna³

et al. 2009

Journal of Integrative Environmental Sciences

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The contamination of groundwater by leached out arsenic has assumed an alarming proportion in several countries. Continued and prolonged ingestion even at a very low level can lead to serious arsenic-related diseases. Strong epidemiological evidence of arsenic carcinogenicity has forced the World Health Organization (WHO) to lower the maximum permissible contaminant limit (MCL) in drinking water to 10 ppb from earlier limit of 50 ppb. This has thrown a big challenge to the scientific community to devise efficient methods to purify contaminated water to such a high level. Though literature abounds in occurrence of groundwater contamination by arsenic and its removal from drinking water by laboratory techniques, millions of people continue to suffer, particularly in the developing countries like India (Bangladesh, West Bengal). Through a comprehensive review of the existing literature on the occurrence, causes, impacts and remedial measures, this article finds out what has gone wrong and what is to be done with special emphasis on membrane-based separation that seems to be highly promising in purifying arsenic-contaminated groundwater to a WHOprescribed level.

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Section: Membrane-based Processes For Purification Of Arsenic-contamisupporting

confidence: 83%

Contamination of groundwater by arsenic: a review of occurrence, causes, impacts, remedies and membrane-based purification

Pal¹,

Sen²,

Manna³

et al. 2009

Journal of Integrative Environmental Sciences

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“…9 In these experiments the effect of contact time on the adsorption of As(V) was studied. The experiments were carried out using 10 mg 3-MPA coated SPION at room temperature (23 ºC) and solution pH 4.0 with the contact time varying in the range of 10-360 min.…”

Section: Sorption-desorption Properties Of As(v) On 3mpa-spionmentioning

confidence: 99%

“…A great variety of water treatment methodologies s such as precipitation [4], oxidation [5], liquid-liquid extraction [6,7], ion exchange [8], membrane processes [9], surface complexation [10] and selective adsorption [11,12] have been studied for significant reduction or remove arsenic from contaminated effluents.…”

Section: Introductionmentioning

confidence: 99%

Arsenate removal with 3-mercaptopropanoic acid-coated superparamagnetic iron oxide nanoparticles

Morillo

Uheida

Pérez

et al. 2015

Journal of Colloid and Interface Science

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In the present work, superparamagnetic iron oxide nanoparticles (SPION) surface-coated with 3-mercaptopropanoic acid (3-MPA) were prepared and their feasibility for the removal of arsenate from dilute aqueous solutions was demonstrated. The synthesized 3-MPA-coated SPION was characterized using transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Fourier transform infra-red spectrometry (FTIR). Separation efficiency of the coated nanoparticles and the equilibrium isotherm of arsenate adsorption were investigated. The obtained results reveal the arsenate adsorption to be highly pH-dependent, and the maximum adsorption was attained in less than 60 minutes. The resulting increase of 3-MPA-coated SPION adsorption capacity to twice the adsorption capacity of SPION alone under the same conditions is attributed to the increase of active adsorption sites. An adsorption reaction is proposed. On the other hand, efficient recovery of arsenate from the loaded nanoparticles was achieved using nitric acid (HNO 3 ) solution, which also provides a concentration over the original arsenate solution. HIGHLIGHTS• Feasibility of using SPION modified with 3MPA for the removal of As(V).• The adsorbent system results in an effective sorption for selective As(V) removal.• The adsorption capacity for As(V) is higher comparing with other adsorbent systems.• Adsorption mechanism has been proposed as the most suitable considering the results.

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“…The conventional technologies for arsenic removal from waters are based on processes of coagulation, sorption, ion-exchange reactions or methods of reverse osmosis. Materials used in these processes are Fe (0), Fe (III) oxyhydroxides, Mn (II), Al (III), apatite, silicate sands, carbonates, sulphides, ash or various types of coal (Chmielewská et al, 2008;Daus et al, 2004;DeMarco et al, 2003;Hiller et al, 2007;Lin and Wu, 2001;Sato et al, 2002;Song et al, 2006). Nowadays, there is a trend to use the alternative and low-cost materials for arsenic removal from the waters in laboratory or medium-scale experiments.…”

Section: Introductionmentioning

confidence: 99%

Removal of arsenic (V) from aqueous solutions using chemically modified sawdust of spruce (Picea abies): Kinetics and isotherm studies

Urík

Littera

Ševc

et al. 2009

Int. J. Environ. Sci. Technol.

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ABSTRACT:Arsenic is a ubiquitous element in the environment and occurs naturally in both organic and inorganic forms. Under aerobic condition, the dominant form of arsenic in waters is arsenate, which is highly mobile and toxic. Arsenic poisoning from drinking water remains a serious world health issue. There are various standard methods for arsenic removal from drinking waters (coagulation, sorption, ion-exchange reactions or methods of reverse osmosis) and alternative methods, such as biosorption. Biosorption of arsenic from natural and model waters by native or chemically modified (with urea or ferric oxyhydroxides) plant biomass prepared from sawdust of Picea abies was studied. The kinetic of the adsorption process fitted well the pseudo second order adsorption model and equilibrium was achieved after 2 h. The results showed that biosorption was well described by both Langmuir and Freundlich isotherms. The maximum biosorption capacity of the sawdust modified with ferric oxyhydroxides, evaluated by Langmuir adsorption model, was 9.259 mg/g, while the biosorption capacity of unmodified biosorbent or biosorbent modified with urea was negligible. The adsorption capacity is comparable to results published by other authors, suggesting that the prepared chemically modified biosorbent has potential in remediation of contaminated waters.

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Performance of nanofiltration for arsenic removal

Cited by 184 publications

References 5 publications

Contamination of groundwater by arsenic: a review of occurrence, causes, impacts, remedies and membrane-based purification

Contamination of groundwater by arsenic: a review of occurrence, causes, impacts, remedies and membrane-based purification

Arsenate removal with 3-mercaptopropanoic acid-coated superparamagnetic iron oxide nanoparticles

Removal of arsenic (V) from aqueous solutions using chemically modified sawdust of spruce (Picea abies): Kinetics and isotherm studies

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