Item talk:Q252537
From geokb
{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "Model predictions of realgar precipitation by reaction of As(III) with synthetic mackinawite under anoxic conditions", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70032969", "url": "https://pubs.usgs.gov/publication/70032969" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70032969 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1021/es801669g", "url": "https://doi.org/10.1021/es801669g" }, { "@type": "PropertyValue", "propertyID": "ISSN", "value": "00139" } ], "journal": { "@type": "Periodical", "name": "Environmental Science & Technology", "volumeNumber": "42", "issueNumber": "24" }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Environmental Science & Technology" } ], "datePublished": "2008", "dateModified": "2018-07-31", "abstract": "This study investigates the removal of As(III) from solution using mackinawite, a nanoparticulate reduced iron sulfide. Mackinawite suspensions (0.1\u221240 g/L) effectively lower initial concentrations of 1.3\u00d710\u22125\u00a0M As(III) from pH 5\u221210, with maximum removal occurring under acidic conditions. Based on Eh\u00a0measurements, it was found that the redox state of the system depended on the mackinawite solids concentration and pH. Higher initial mackinawite concentrations and alkaline pH resulted in a more reducing redox condition. Given this, the pH edge data were modeled thermodynamically using pe (\u2212log[e\u2212]) as a fitting parameter and linear pe\u2212pH relationships within the range of measured Eh\u00a0values as a function of pH and mackinawite concentration. The model predicts removal of As(III) from solution by precipitation of realgar with the formation of secondary oxidation products, greigite or a mixed-valence iron oxide phase, depending on pH. This study demonstrates that mackinawite is an effective sequestration agent for As(III) and highlights the importance of incorporating redox into models describing the As\u2212Fe\u2212S\u2212H2O system.", "description": "6 p.", "publisher": { "@type": "Organization", "name": "American Chemical Society" }, "author": [ { "@type": "Person", "name": "Gallegos, T.J.", "givenName": "T.J.", "familyName": "Gallegos", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0003-3350-6473", "url": "https://orcid.org/0000-0003-3350-6473" } }, { "@type": "Person", "name": "Han, Y.-S.", "givenName": "Y.-S.", "familyName": "Han" }, { "@type": "Person", "name": "Hayes, K.F.", "givenName": "K.F.", "familyName": "Hayes" } ] }, "OpenAlex": { "abstract_inverted_index": { "This": [ 0, 140 ], "study": [ 1, 141 ], "investigates": [ 2 ], "the": [ 3, 48, 52, 56, 78, 97, 124, 154, 162 ], "removal": [ 4, 35, 114 ], "of": [ 5, 24, 51, 99, 106, 115, 121, 126, 156 ], "As(III)": [ 6, 29, 116, 151 ], "from": [ 7, 30, 117 ], "solution": [ 8, 118 ], "using": [ 9, 85 ], "mackinawite,": [ 10 ], "a": [ 11, 71, 89, 104, 132 ], "nanoparticulate": [ 12 ], "reduced": [ 13 ], "iron": [ 14, 134 ], "sulfide.": [ 15 ], "Mackinawite": [ 16 ], "suspensions": [ 17 ], "(0.1\u221240": [ 18 ], "g/L)": [ 19 ], "effectively": [ 20 ], "lower": [ 21 ], "initial": [ 22, 63 ], "concentrations": [ 23, 65 ], "1.3": [ 25 ], "\u00d7": [ 26 ], "10\u22125": [ 27 ], "M": [ 28 ], "pH": [ 31, 68, 79, 107 ], "5\u221210,": [ 32 ], "with": [ 33, 123 ], "maximum": [ 34 ], "occurring": [ 36 ], "under": [ 37 ], "acidic": [ 38 ], "conditions.": [ 39 ], "Based": [ 40 ], "on": [ 41, 55, 138 ], "Eh": [ 42, 101 ], "measurements,": [ 43 ], "it": [ 44 ], "was": [ 45 ], "found": [ 46 ], "that": [ 47, 143 ], "redox": [ 49, 74, 158 ], "state": [ 50 ], "system": [ 53 ], "depended": [ 54 ], "mackinawite": [ 57, 64, 109, 144 ], "solids": [ 58 ], "concentration": [ 59 ], "and": [ 60, 66, 92, 108, 152 ], "pH.": [ 61, 139 ], "Higher": [ 62 ], "alkaline": [ 67 ], "resulted": [ 69 ], "in": [ 70 ], "more": [ 72 ], "reducing": [ 73 ], "condition.": [ 75 ], "Given": [ 76 ], "this,": [ 77 ], "edge": [ 80 ], "data": [ 81 ], "were": [ 82 ], "modeled": [ 83 ], "thermodynamically": [ 84 ], "pe": [ 86 ], "(\u2212log[e\u2212])": [ 87 ], "as": [ 88, 103 ], "fitting": [ 90 ], "parameter": [ 91 ], "linear": [ 93 ], "pe\u2212pH": [ 94 ], "relationships": [ 95 ], "within": [ 96 ], "range": [ 98 ], "measured": [ 100 ], "values": [ 102 ], "function": [ 105 ], "concentration.": [ 110 ], "The": [ 111 ], "model": [ 112 ], "predicts": [ 113 ], "by": [ 119 ], "precipitation": [ 120 ], "realgar": [ 122 ], "formation": [ 125 ], "secondary": [ 127 ], "oxidation": [ 128 ], "products,": [ 129 ], "greigite": [ 130 ], "or": [ 131 ], "mixed-valence": [ 133 ], "oxide": [ 135 ], "phase,": [ 136 ], "depending": [ 137 ], "demonstrates": [ 142 ], "is": [ 145 ], "an": [ 146 ], "effective": [ 147 ], "sequestration": [ 148 ], "agent": [ 149 ], "for": [ 150 ], "highlights": [ 153 ], "importance": [ 155 ], "incorporating": [ 157 ], "into": [ 159 ], "models": [ 160 ], "describing": [ 161 ], "As\u2212Fe\u2212S\u2212H2O": [ 163 ], "system.": [ 164 ] }, "apc_list": null, "apc_paid": null, "authorships": [ { "author_position": "first", "author": { "id": "https://openalex.org/A5080149407", "display_name": "Tanya J. 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