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Arsenic and its speciation analysis in biological and environmental samples using ICP techniques

Arsenic (As) is one of the common cancers causing contaminant in groundwater of West Bengal, India along with other regions of the world. Scientists believe that As contamination in groundwater of these region are because of the reductive dissolution of iron oxyhydroxide and the oxidation of organic matter. However, our research shows that a combination of carbonate mineral dissolution and the reduction of iron oxyhydroxides accounts for the high As concentration in groundwater. Thus the people of this region are exposed daily to high levels of As through various pathways. Our study on saliva shows that this biofluid is a good biomarker of As exposure. Moreover, by measuring the various forms of As in saliva, individual susceptibility to arsenic related diseases can be understood. Lastly, we propose nano Zero Valent iron doped onto montmorillonite as an effective material to reduce high levels of As in water quickly and efficiently

L鈥檃rs猫nic (As) 茅s un dels contaminants cancer铆gens m茅s comuns en les aig眉es subterr脿nies de Bengala Occidental, 脥ndia, aix铆 com d鈥檃ltres regions. Els cient铆fics creuen que la contaminaci贸 en ars猫nic en l鈥檃igua subterr脿nia d鈥檃questa regi贸 茅s deguda a la dissoluci贸 reductiva dels oxihidr貌xids de ferro i a l鈥檕xidaci贸 de la mat猫ria org脿nica. No obstant, la nostra investigaci贸 mostra que una combinaci贸 de la dissoluci贸 mineral de carbonat i la reducci贸 dels oxihidr貌xids de ferro en s贸n la causa. Com a conseq眉猫ncia la poblaci贸 d鈥檃questa regi贸 estan exposats a nivells alts d鈥橝s. El nostre estudi mostra que la saliva 茅s un bon biomarcador d鈥檈xposici贸 a l鈥檃rs猫nic. A m茅s, mitjan莽ant la determinaci贸 de l鈥檈speciaci贸 d鈥橝s en saliva es pot comprendre la susceptibilitat individual a malalties relacionades amb aquest element. Finalment, proposem la utilitzaci贸 de montmorillonita dopada amb nanopart铆cules de ferro met脿l路lic com un material efica莽 per reduir els alts nivells d鈥橝s en l鈥檃igua

Universitat de Girona

Manager: Iglesias Junc脿, M貌nica
Rom谩n-Ross, Gabriela
Chatterjee, Debashis
Other contributions: Universitat de Girona. Departament de Qu铆mica
Author: Bhowmick, Subhamoy
Date: 2013 October 31
Abstract: Arsenic (As) is one of the common cancers causing contaminant in groundwater of West Bengal, India along with other regions of the world. Scientists believe that As contamination in groundwater of these region are because of the reductive dissolution of iron oxyhydroxide and the oxidation of organic matter. However, our research shows that a combination of carbonate mineral dissolution and the reduction of iron oxyhydroxides accounts for the high As concentration in groundwater. Thus the people of this region are exposed daily to high levels of As through various pathways. Our study on saliva shows that this biofluid is a good biomarker of As exposure. Moreover, by measuring the various forms of As in saliva, individual susceptibility to arsenic related diseases can be understood. Lastly, we propose nano Zero Valent iron doped onto montmorillonite as an effective material to reduce high levels of As in water quickly and efficiently
L鈥檃rs猫nic (As) 茅s un dels contaminants cancer铆gens m茅s comuns en les aig眉es subterr脿nies de Bengala Occidental, 脥ndia, aix铆 com d鈥檃ltres regions. Els cient铆fics creuen que la contaminaci贸 en ars猫nic en l鈥檃igua subterr脿nia d鈥檃questa regi贸 茅s deguda a la dissoluci贸 reductiva dels oxihidr貌xids de ferro i a l鈥檕xidaci贸 de la mat猫ria org脿nica. No obstant, la nostra investigaci贸 mostra que una combinaci贸 de la dissoluci贸 mineral de carbonat i la reducci贸 dels oxihidr貌xids de ferro en s贸n la causa. Com a conseq眉猫ncia la poblaci贸 d鈥檃questa regi贸 estan exposats a nivells alts d鈥橝s. El nostre estudi mostra que la saliva 茅s un bon biomarcador d鈥檈xposici贸 a l鈥檃rs猫nic. A m茅s, mitjan莽ant la determinaci贸 de l鈥檈speciaci贸 d鈥橝s en saliva es pot comprendre la susceptibilitat individual a malalties relacionades amb aquest element. Finalment, proposem la utilitzaci贸 de montmorillonita dopada amb nanopart铆cules de ferro met脿l路lic com un material efica莽 per reduir els alts nivells d鈥橝s en l鈥檃igua
Format: application/pdf
Document access: http://hdl.handle.net/10803/125307
Language: eng
Publisher: Universitat de Girona
Rights: ADVERTIMENT. L鈥檃cc茅s als continguts d鈥檃questa tesi doctoral i la seva utilitzaci贸 ha de respectar els drets de la persona autora. Pot ser utilitzada per a consulta o estudi personal, aix铆 com en activitats o materials d鈥檌nvestigaci贸 i doc猫ncia en els termes establerts a l鈥檃rt. 32 del Text Ref贸s de la Llei de Propietat Intel路lectual (RDL 1/1996). Per altres utilitzacions es requereix l鈥檃utoritzaci贸 pr猫via i expressa de la persona autora. En qualsevol cas, en la utilitzaci贸 dels seus continguts caldr脿 indicar de forma clara el nom i cognoms de la persona autora i el t铆tol de la tesi doctoral. No s鈥檃utoritza la seva reproducci贸 o altres formes d鈥檈xplotaci贸 efectuades amb finalitats de lucre ni la seva comunicaci贸 p煤blica des d鈥檜n lloc ali猫 al servei TDX. Tampoc s鈥檃utoritza la presentaci贸 del seu contingut en una finestra o marc ali猫 a TDX (framing). Aquesta reserva de drets afecta tant als continguts de la tesi com als seus resums i 铆ndexs.
Subject: Qu铆mica anal铆tica
Title: Arsenic and its speciation analysis in biological and environmental samples using ICP techniques
Type: doctoralThesis
Repository: TDX

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