Adsorption kinetic control of As(III &amp; V) mobilization and sequestration by Mangrove sediment

Mandal, S. K.; Majumder, Natasha; Chowdhury, Chumki; Ganguly, Dipnarayan; Dey, Munmun; Jana, T. K.

doi:10.1007/s12665-011-1183-9

Cited by 21 publications

(20 citation statements)

References 37 publications

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“…These results are in agreement with those reported in the literature highlighting the role of sediments on arsenic removal by adsorption (Borgnino et al, 2012, Mandal et al, 2012 Recently it was reported that being epipsammic biofilms on the sediment play a key role in the fate and mobility of As in riverine environments and particularly in the transference of As from the water column to the sediment (Prieto et al 2013). Our results and those from the literature agree with the role that sediments play as arsenic sinks in natural systems, thus moving exposure from the water column to the benthic compartment.…”

Section: Discussionsupporting

confidence: 91%

Arsenic toxicity effects on microbial communities and nutrient cycling in indoor experimental channels mimicking a fluvial system

2015

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Section: Discussionsupporting

confidence: 91%

Arsenic toxicity effects on microbial communities and nutrient cycling in indoor experimental channels mimicking a fluvial system

2015

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“…1 Negative relationships between total As and organic carbon were reported for four sites in the Sundarbans, West Bengal. 3 Organic carbon content is not a strong predictor of total As in Sundarban surface sediments.…”

Section: ■ Results and Discussionmentioning

confidence: 92%

“…The lower surface areas of coarser riverbank sediments have a lower As absorbing capacity due to reduced surface area compared to fine particles that dominate the forest floor. Mandal et al 3 investigated the kinetics of As release from four Indian Sundarban sediments and found that desorption from the solid phase was the rate limiting factor in As mobilization. Moreover, here As dissolution was found more associated with Mn than Fe (Figure SI 8); negative Fe and As association could be an indication of readsorption of As.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Spatial Heterogeneity and Kinetic Regulation of Arsenic Dynamics in Mangrove Sediments: The Sundarbans, Bangladesh

Hossain

Mestrot

Norton

et al. 2012

Environ. Sci. Technol.

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The biogeochemistry of arsenic (As) in sediments is regulated by multiple factors such as particle size, dissolved organic matter (DOM), iron mobilization, and sediment binding characteristics, among others. Understanding the heterogeneity of factors affecting As deposition and the kinetics of mobilization, both horizontally and vertically, across sediment depositional environments was investigated in Sundarban mangrove ecosystems, Bengal Delta, Bangladesh. Sediment cores were collected from 3 different Sundarbans locations and As concentration down the profiles were found to be more associated with elevated Fe and Mn than with organic matter (OM). At one site chosen for field monitoring, sediment cores, pore and surface water, and in situ diffusive gradients in thin films (DGT) measurements (which were used to model As sediment pore-water concentrations and resupply from the solid phase) were sampled from four different subhabitats. Coarse-textured riverbank sediment porewaters were high in As, but with a limited resupply of As from the solid phase compared to fine-textured and high organic matter content forest floor sediments, where porewater As was low, but with much higher As resupply. Depositional environment (overbank verses forest floor) and biological activity (input of OM from forest biomass) considerably affected As dynamics over very short spatial distances in the mosaic of microhabitats that constitute a mangrove ecosystem.

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“…However, their high fabrication cost limits their wide application in practice. Most recently, some low-cost adsorbents such as agricultural and industrial by-products have been investigated for arsenic removal (Soner Altundogan et al, 2000;Mandal et al, 2012). For instance, Mandal et al (2012) studied the adsorption of As(III) and As(V) by the mangrove sediment, and results showed that ligand exchange and adsorption reactions occurred in both organic matter and the hydroxide phase (Mandal et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Most recently, some low-cost adsorbents such as agricultural and industrial by-products have been investigated for arsenic removal (Soner Altundogan et al, 2000;Mandal et al, 2012). For instance, Mandal et al (2012) studied the adsorption of As(III) and As(V) by the mangrove sediment, and results showed that ligand exchange and adsorption reactions occurred in both organic matter and the hydroxide phase (Mandal et al, 2012). Industrial waste such as red mud and iron oxide-loaded melted municipal solid waste incinerator slag was also tested, and the calculated maximum adsorption capacity for As(III) and As(V) was 8.86 and 10.80 lmol/g, respectively.…”

Section: Introductionmentioning

confidence: 99%

Reusability of Al-F Hydroxide Precipitates Generated in Adsorption and Coagulation Treatment of Fluoride for Adsorptive Removal of Arsenic

Liu

et al. 2015

Environmental Engineering Science

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This study aims to investigate the feasibility of utilizing Al-F hydroxide precipitates generated in Al hydroxide [Al(OH) 3 ] adsorption [Al(OH) 3 -F ads ] and aluminum (Al) coagulation [Al(OH) 3 -F coag ] for adsorptive removal of As(III) and As(V). Al(OH) 3 -F ads , Al(OH) 3 -F coag , and pristine Al(OH) 3 were characterized by nitrogen sorption, X-ray photoelectron spectroscopy, and fourier transform infrared spectroscopy (FTIR) before and after arsenic adsorption. The kinetic study indicated that As(III) and As(V) adsorption on these Al-based solid wastes followed the pseudo-second-order model. The calculated adsorption capacity of Al(OH) 3 -F ads and Al(OH) 3 -F coag for As(III) was 48.0 and 31.0 mg/g, while it was 84.0 and 56.3 mg/g for As(V), respectively. These adsorption capacities were 25-50% lower compared with pristine Al(OH) 3 . Anion exchange of fluoride by H 2 AsO 4 -and HAsO 4 2 -dominated in As(V) removal by Al(OH) 3 -F ads, while formation of an As-O complex played a more important role in As(V) removal by Al(OH) 3 -F coag . The maximum concentration of released fluoride after the adsorption of As(III) and As(V) by Al(OH) 3 -F ads and Al(OH) 3 -F coag was below the Chinese Class-II industrial discharge standard for fluoride (<20 mg/L). Results from this study indicated that the aluminum hydroxides generated in the fluoride removal process could be reclaimed as an adsorbent for As(III)/As(V) removal from industrial wastewater.

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Adsorption kinetic control of As(III & V) mobilization and sequestration by Mangrove sediment

Cited by 21 publications

References 37 publications

Arsenic toxicity effects on microbial communities and nutrient cycling in indoor experimental channels mimicking a fluvial system

Arsenic toxicity effects on microbial communities and nutrient cycling in indoor experimental channels mimicking a fluvial system

Spatial Heterogeneity and Kinetic Regulation of Arsenic Dynamics in Mangrove Sediments: The Sundarbans, Bangladesh

Reusability of Al-F Hydroxide Precipitates Generated in Adsorption and Coagulation Treatment of Fluoride for Adsorptive Removal of Arsenic

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