Item talk:Q235310
From geokb
{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "pH dependence of iron photoreduction in a rocky mountain stream affected by acid mine drainage", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70023349", "url": "https://pubs.usgs.gov/publication/70023349" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70023349 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1002/hyp.251", "url": "https://doi.org/10.1002/hyp.251" }, { "@type": "PropertyValue", "propertyID": "ISSN", "value": "08856087" } ], "journal": { "@type": "Periodical", "name": "Hydrological Processes", "volumeNumber": "15", "issueNumber": "10" }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Hydrological Processes" } ], "datePublished": "2001", "dateModified": "2018-11-30", "abstract": "The redox speciation of dissolved iron and the transport of iron in acidic, metal\u2010enriched streams is controlled by precipitation and dissolution of iron hydroxides, by photoreduction of dissolved ferric iron and hydrous iron oxides, and by oxidation of the resulting dissolved ferrous iron. We examined the pH dependence of these processes in an acidic mine\u2010drainage stream, St Kevin Gulch, Colorado, by experimentally increasing the pH of the stream from about 4\u00b70 to 6\u00b75 and following the downstream changes in iron species. We used a solute transport model with variable flow to evaluate biogeochemical processes controlling downstream transport. We found that at pH 6\u00b74 there was a rapid and large initial loss of ferrous iron concurrent with the precipitation of aluminium hydroxide. Below this reach, ferrous iron was conservative during the morning but there was a net downstream loss of ferrous iron around noon and in the afternoon. Calculation of net oxidation rates shows that the noontime loss rate was generally much faster than rates for the ferrous iron oxidation at pH 6 predicted by Singer and Stumm (1970.\u00a0Science\u00a0167: 1121). The maintenance of ferrous iron concentrations in the morning is explained by the photoreduction of photoreactive ferric species, which are then depleted by noon.\u00a0", "description": "14 p.", "publisher": { "@type": "Organization", "name": "Wiley" }, "author": [ { "@type": "Person", "name": "McKnight, Diane M.", "givenName": "Diane M.", "familyName": "McKnight", "affiliation": [ { "@type": "Organization", "name": "INSTAAR, University of Colorado" } ] }, { "@type": "Person", "name": "Kimball, B. A.", "givenName": "B. A.", "familyName": "Kimball" }, { "@type": "Person", "name": "Runkel, R.L.", "givenName": "R.L.", "familyName": "Runkel" } ], "funder": [ { "@type": "Organization", "name": "Toxic Substances Hydrology Program", "url": null } ] }, "OpenAlex": { "abstract_inverted_index": { "Abstract": [ 0 ], "The": [ 1, 183 ], "redox": [ 2 ], "speciation": [ 3 ], "of": [ 4, 10, 22, 27, 38, 49, 66, 112, 119, 139, 149, 185, 197 ], "dissolved": [ 5, 28, 41 ], "iron": [ 6, 11, 23, 30, 33, 80, 114, 126, 141, 168, 187 ], "and": [ 7, 20, 31, 35, 74, 108, 144, 176 ], "the": [ 8, 39, 46, 64, 67, 76, 117, 130, 146, 155, 166, 190, 195 ], "transport": [ 9, 86 ], "in": [ 12, 52, 79, 145, 189 ], "acidic,": [ 13 ], "metal\u2010enriched": [ 14 ], "streams": [ 15 ], "is": [ 16, 192 ], "controlled": [ 17 ], "by": [ 18, 25, 36, 61, 174, 194, 205 ], "precipitation": [ 19, 118 ], "dissolution": [ 21 ], "hydroxides,": [ 24 ], "photoreduction": [ 26, 196 ], "ferric": [ 29, 199 ], "hydrous": [ 32 ], "oxides,": [ 34 ], "oxidation": [ 37, 151, 169 ], "resulting": [ 40 ], "ferrous": [ 42, 113, 125, 140, 167, 186 ], "iron.": [ 43 ], "We": [ 44, 82, 98 ], "examined": [ 45 ], "pH": [ 47, 65, 102, 171 ], "dependence": [ 48 ], "these": [ 50 ], "processes": [ 51, 94 ], "an": [ 53 ], "acidic": [ 54 ], "mine\u2010drainage": [ 55 ], "stream,": [ 56 ], "St": [ 57 ], "Kevin": [ 58 ], "Gulch,": [ 59 ], "Colorado,": [ 60 ], "experimentally": [ 62 ], "increasing": [ 63 ], "stream": [ 68 ], "from": [ 69 ], "about": [ 70 ], "4\u00b70": [ 71 ], "to": [ 72, 91 ], "6\u00b75": [ 73 ], "following": [ 75 ], "downstream": [ 77, 96, 137 ], "changes": [ 78 ], "species.": [ 81 ], "used": [ 83 ], "a": [ 84, 106, 135 ], "solute": [ 85 ], "model": [ 87 ], "with": [ 88, 116 ], "variable": [ 89 ], "flow": [ 90 ], "evaluate": [ 92 ], "biogeochemical": [ 93 ], "controlling": [ 95 ], "transport.": [ 97 ], "found": [ 99 ], "that": [ 100, 154 ], "at": [ 101, 170 ], "6\u00b74": [ 103 ], "there": [ 104, 133 ], "was": [ 105, 127, 134, 159 ], "rapid": [ 107 ], "large": [ 109 ], "initial": [ 110 ], "loss": [ 111, 138, 157 ], "concurrent": [ 115 ], "aluminium": [ 120 ], "hydroxide.": [ 121 ], "Below": [ 122 ], "this": [ 123 ], "reach,": [ 124 ], "conservative": [ 128 ], "during": [ 129 ], "morning": [ 131, 191 ], "but": [ 132 ], "net": [ 136, 150 ], "around": [ 142 ], "noon": [ 143 ], "afternoon.": [ 147 ], "Calculation": [ 148 ], "rates": [ 152, 164 ], "shows": [ 153 ], "noontime": [ 156 ], "rate": [ 158 ], "generally": [ 160 ], "much": [ 161 ], "faster": [ 162 ], "than": [ 163 ], "for": [ 165 ], "6": [ 172 ], "predicted": [ 173 ], "Singer": [ 175 ], "Stumm": [ 177 ], "(1970.": [ 178 ], "Science": [ 179 ], "167": [ 180 ], ":": [ 181 ], "1121).": [ 182 ], "maintenance": [ 184 ], "concentrations": [ 188 ], "explained": [ 193 ], "photoreactive": [ 198 ], "species,": [ 200 ], "which": [ 201 ], "are": [ 202 ], "then": [ 203 ], "depleted": [ 204 ], "noon.": [ 206 ], "Copyright": [ 207 ], "\u00a9": [ 208 ], "2001": [ 209 ], "John": [ 210 ], "Wiley": [ 211 ], "&": [ 212 ], "Sons,": [ 213 ], "Ltd.": [ 214 ] }, "apc_list": { "value": 4740, "currency": "USD", "value_usd": 4740, "provenance": "doaj" }, "apc_paid": null, "authorships": [ { "author_position": "first", "author": { "id": "https://openalex.org/A5014070015", "display_name": "Diane M. 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