{"id":2717,"date":"2020-11-18T03:26:57","date_gmt":"2020-11-18T03:26:57","guid":{"rendered":"http:\/\/agri-research-journal.net\/SjarEn\/?p=2717"},"modified":"2020-11-18T03:26:58","modified_gmt":"2020-11-18T03:26:58","slug":"remediation-of-groundwater-contaminated-with-hexavalent-%e2%80%8echromium-using-a-mixture-of-zero-valent-iron-and-pyrite-%e2%80%8e","status":"publish","type":"post","link":"https:\/\/agri-research-journal.net\/SjarEn\/?p=2717","title":{"rendered":"Remediation of groundwater contaminated with hexavalent \u200echromium using a mixture of Zero-Valent Iron and Pyrite \u200e"},"content":{"rendered":"\n

Waseem\nYousef Daoud*(1)<\/sup><\/strong><\/strong><\/p>\n\n\n\n

(1). Department of Civil and\nEnvironmental Engineering, Amirkabir University of Technology (Tehran\nPolytechnic), Tehran, Iran<\/p>\n\n\n\n

(*Corresponding author: Dr. Waseem Yousef Daoud. E-Mail: waseem.daoud@yahoo.com<\/a>).   <\/p>\n\n\n\n

Received: 13\/09\/2020                               Accepted: 17\/10\/2020<\/p>\n\n\n\n

Abstract<\/strong><\/p>\n\n\n\n

Permeable\nReactive Barriers (PRBs) with Zero Valent Iron (ZVI) have been used to\nremediate groundwater contaminated with metals such hexavalent chromium Cr(VI). Cr(VI) is of\nparticular environmental concern due to its toxicity and mobility and is\nchallenging to remove from industrial wastewater. It is a strong oxidizing\nagent that is carcinogenic and mutagenic, and diffuses quickly through soil and\naquatic environments. It does not form insoluble compounds in aqueous\nsolutions, so separation by precipitation is not feasible. While Cr(VI)\noxyanions are very mobile and toxic in the environment, trivalent Cr(III)\ncations are not. Like many metal cations, Cr(III) forms insoluble precipitates.\nThus, reducing Cr(VI) to Cr(III) makes its removal from effluent easier and\nalso reduces its toxicity and mobility. At high pH values iron precipitations\nare expected to occur which lead to changes in ZVI surface,\ntherefore the reactivity and hydraulic performance of ZVI decrease over time.  ZVI reactivity was\nprolonged by adding\npyrite (FeS2<\/sub>) to ZVI for scavenging oxygen in feed water as well as\nneutralizing the effects of \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n \n. An increase in Cr(VI) removal was found in ZVI preceded by\nFeS2<\/sub>.<\/p>\n\n\n\n

Keywords: <\/strong>Permeable reactive barriers; Polluted groundwater; Hexavalent chromium; Zero valent iron; Pyrite.<\/p>\n\n\n\n

Full Paper in English: PDF<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Waseem Yousef Daoud*(1) (1). Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran (*Corresponding author: Dr. Waseem Yousef Daoud. E-Mail: waseem.daoud@yahoo.com).   Received: 13\/09\/2020                               Accepted: 17\/10\/2020 Abstract Permeable Reactive Barriers (PRBs) with Zero Valent … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2717","post","type-post","status-publish","format-standard","hentry","category-sjar"],"_links":{"self":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2717","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2717"}],"version-history":[{"count":1,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2717\/revisions"}],"predecessor-version":[{"id":2718,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2717\/revisions\/2718"}],"wp:attachment":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}