@article{Azam_Shafiquzzaman_Mishima_Nakajima_2008, title={Measurement of Soluble Arsenic in Soil of Bangladesh by Acid-alkali Sequential Extraction}, volume={1}, url={https://banglajol.info/index.php/JSR/article/view/1058}, DOI={10.3329/jsr.v1i1.1058}, abstractNote={<span style="font-family: Times New Roman;"><span style="font-size: 9pt;"><p class="MsoNormal" style="margin: 0cm 11.35pt 0pt 14.2pt;"><span style="font-size: 9pt;" lang="EN-US">To measure easily soluble fraction of arsenic, a sequential extraction method by 0.1N HCl and 0.1N NaOH was used </span><span style="font-size: 9pt; mso-bidi-language: BN;" lang="EN-US">according to the soil phosphorus extraction procedure</span><span style="font-size: 9pt;" lang="EN-US">. The effects of reducing conditions on arsenic extraction were examined in incubation test. In high reducing conditions arsenic solubility was shown to be high and seemed to be controlled by dissolution of iron oxy-hydroxides. pH played a predominant role in determining the concentrations of soluble arsenic. Arsenic solubility could be possible at low or high pH conditions. Released arsenic in different pH and redox conditions showed that it is a part of acid extractable arsenic which is sorbed weakly on the soil surface and can be extracted during acid-alkali sequential extraction. Therefore, the method could be applicable to measure potential solubility of arsenic as a result of alteration in soil (e.g. redox, pH) and environmental factors. Sequential extraction results of the soil samples collected in dry and wet season suggested that acid-alkali extracted arsenic fractions of surface and core soil samples of paddy field were increased in wet season. They seemed to be moved with irrigation groundwater.</span></p><p class="MsoNormal" style="margin: 0cm 11.35pt 0pt 14.2pt;"><span style="font-size: 4pt; mso-bidi-font-size: 9.0pt;" lang="EN-US"> </span></p><p class="MsoNormal" style="margin: 0cm 11.35pt 0pt 14.2pt; vertical-align: bottom; punctuation-wrap: simple;"><em style="mso-bidi-font-style: normal;"><span style="font-size: 9pt; mso-bidi-font-weight: bold;" lang="EN-US">Keywords</span></em><strong style="mso-bidi-font-weight: normal;"><span style="font-size: 9pt; mso-bidi-font-style: italic;" lang="EN-US">:</span></strong><span style="font-size: 9pt; mso-bidi-font-style: italic;" lang="EN-US"> Acid-alkali extraction; Arsenic contamination; Soil arsenic mobility; Groundwater contamination; Paddy soil. </span></p><p class="MsoNormal" style="margin: 0cm 11.35pt 0pt 14.2pt; vertical-align: bottom; punctuation-wrap: simple;"><span style="font-size: 9pt; mso-bidi-font-style: italic;" lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 14.2pt; mso-layout-grid-align: none;"><span style="font-size: 8pt; mso-ansi-language: EN-SG; mso-fareast-language: EN-SG;">©</span><span style="font-size: 8pt; font-family: Symbol;"> </span><span style="font-size: 8pt; mso-ansi-language: EN-SG; mso-fareast-language: EN-SG;">2009 JSR Publications. ISSN: 2070-0237(Print); 2070-0245 (Online). All rights </span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 14.2pt; mso-layout-grid-align: none;"><span style="font-size: 8pt; mso-ansi-language: EN-SG; mso-fareast-language: EN-SG;">reserved.</span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 14.2pt; mso-layout-grid-align: none;"><span style="font-size: 2pt; mso-bidi-font-size: 8.0pt; mso-ansi-language: EN-SG; mso-fareast-language: EN-SG;"> </span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 14.2pt;"><span style="font-size: 8pt; mso-ansi-language: EN-SG; mso-fareast-language: EN-SG;">DOI: 10.3329/jsr.v1i1.1058</span></p><p class="MsoNormal" style="margin: 0in 31.7pt 0pt 27.35pt; line-height: 12pt; mso-line-height-rule: exactly;"> </p></span></span><p class="MsoNormal" style="margin: 0in 31.7pt 0pt 27.35pt; line-height: 12pt; mso-line-height-rule: exactly;"> </p>}, number={1}, journal={Journal of Scientific Research}, author={Azam, Mohammad Shafiul and Shafiquzzaman, Md. and Mishima, Iori and Nakajima, Jun}, year={2008}, month={Dec.}, pages={92–107} }