Arsenic(V) removal from aqueous solutions using an anion exchanger derived from coconut coir pith and its recovery

Anirudhan, T.S.; Unnithan, Maya R.

doi:10.1016/j.chemosphere.2006.05.031

Cited by 175 publications

(62 citation statements)

References 17 publications

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“…), cabinets, boxes and vases inside the house [17][18][19]. The project also aims to evaluate the performance of CFB in actual service condition.…”

Section: Application and Service Test Of Coconut Fiber Cement Boards mentioning

confidence: 99%

“…Most commercial polypropylene has an intermediate level of crystallinity between that of Low Density Polyethylene (LDPE) and High Density Polyethylene (HDPE); its Young's modulus is also intermediate [9,19]. Although it is less tough than HDPE and less flexible than LDPE, it is much more brittle than HDPE [12].…”

Section: The Chemical and Physical Properties Of Polypropylenementioning

confidence: 99%

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Investigation on the use of Coco Coir Polypropylene as Thermal Insulator

Ganiron¹

2013

IJAST

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“…), cabinets, boxes and vases inside the house [17][18][19]. The project also aims to evaluate the performance of CFB in actual service condition.…”

Section: Application and Service Test Of Coconut Fiber Cement Boards mentioning

confidence: 99%

Section: The Chemical and Physical Properties Of Polypropylenementioning

confidence: 99%

Investigation on the use of Coco Coir Polypropylene as Thermal Insulator

Ganiron¹

2013

IJAST

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“…Weathering of rocks and minerals containing arsenic, volcanic emissions and also a result of some biological processes can be mentioned as example of natural processes releasing arsenic into the environment. Moreover, anthropogenic sources include release of arsenic from various industries, such as smelting, petroleum refinery, glass manufacturing, production of fertilizers, and intensive application of arsenic containing plant protection chemicals such as insecticides, herbicides and crop desiccants, as well as arsenic additives are used in the production of livestock feed [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…However, the main disadvantage is the high costs. It is considered that sorption is one of the most effective and affordable methods [6][7][8]10].…”

Section: Introductionmentioning

confidence: 99%

Sorption of V and VI group metalloids (As, Sb, Te) on modified peat sorbents

Ansone-Bertina

Kļaviņš

2016

Open Chemistry

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Abstract:The present work investigates arsenic, antimony and tellurium sorption using iron modified peat. The results were obtained using batch tests and the sorption was studied as a function of initial metalloid concentration, pH and sorption time, as well as the presence of competing substances. The obtained results indicate that modification of peat with Fe compounds significantly enhances the sorption capacity of the sorbents used for sorption of arsenic, antimony and tellurium. The optimal pH interval for the sorption of Sb(III) is 6.5-9 and for As(V) and Sb(V) -3-6, while As(III) and tellurium sorption using Fe-modified peat is favourable in a wider interval of 3-9. The presence of competing ions as well as HA affect sorption of metalloids on Fe-modified peat. A minor impact on the reduction of metalloid sorption was detected in the presence of nitrate, sulphate, carbonate and tartrate ions, while in the presence of phosphate and HA the sorption ability of metalloids can be considerably reduced. The obtained results of kinetic experiments indicate that sorption of metalloids on Fe-modified peat mainly occurs relying on mechanisms of physical sorption processes.Keywords: peat, sorbents, arsenic, antimony, tellurium, metalloids Environmental contextGrowing attention is being paid to environmental pollution with metalloids (As, Sb, Te) requiring new approaches for removal of these elements from water. The present work investigates arsenic, antimony and tellurium sorption using iron modified peat. Iron modified peat has high sorption capacity in respect to all environmentally relevant metalloid speciation forms [As(V), As(III), As(org.), Sb(III), Sb(V), Te(IV) and Te(VI)]. The sorption takes place according to mechanisms of physical sorption and is affected by pH of a solution as well as competing ions.

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“…Bioremediation involves processes that reduce overall treatment cost through the application of agricultural residues which are particularly attractive as they lessen reliance on imported water treatment chemicals, negligible transportation requirements and offer genuine, localized and appropriate solutions to water quality problems Kardam et al 2010). Biological materials such as algae, bacteria, fungi, yeast and agricultural waste products like water hyacinth, sunflower stalk, coconut coir pith, rice husk and grape stalk waste have been recognized as cheap natural sorbents for the removal of toxic metals (Anirudhan and Unnithan 2007;Alvarado et al 2008;Malik et al 2009;Yeneneh et al 2011). Current research is oriented towards the enhancement in the sorption capacity and reusability of the biosorbent making it suitable for commercialization.…”

Section: Introductionmentioning

confidence: 99%

PEI modified Leucaena leucocephala seed powder, a potential biosorbent for the decontamination of arsenic species from water bodies: bioremediation

2012

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Environmental contamination due to anthropogenic and natural sources is increasing day by day because of increase in population, industrialization and urbanization. Arsenic species released into the environment tend to persist indefinitely, circulating and eventually accumulating throughout the food chain, thus becoming a serious threat to the environment. The present study explores the effectiveness of Leucaena leucocephala seed powder (agricultural waste) in removing arsenic ions from aqueous solution. Batch studies were carried out to characterize As (III) and As (V) removal capability of L. leucocephala seed powder. Maximum biosorption capacity for As (III) and As (V) was found to be 81.88 and 92.61 %, respectively. Amino acid-arsenic interaction has been highlighted on the basis of shifting of FTIR bands of native LLSP. Morphological changes and reduction in pore area have been observed in modified LLSP. Modification on the native LLSP results into the increase in percentage sorption of As (III) and As (V) up to 85 and 99 %, respectively. Enhancement in the percentage sorption is due the increase in the stability of the biosorbent due to increase in the final decomposition temperature of the modified LLSP. The findings showed that L. leucocephala seed powder can easily be envisaged as a new, vibrant, low-cost biosorbent for arsenic clean-up operations.

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Arsenic(V) removal from aqueous solutions using an anion exchanger derived from coconut coir pith and its recovery

Cited by 175 publications

References 17 publications

Investigation on the use of Coco Coir Polypropylene as Thermal Insulator

Investigation on the use of Coco Coir Polypropylene as Thermal Insulator

Sorption of V and VI group metalloids (As, Sb, Te) on modified peat sorbents

PEI modified Leucaena leucocephala seed powder, a potential biosorbent for the decontamination of arsenic species from water bodies: bioremediation

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