Detoxification of Cyanide in a Gold Processing Plant Tailings Water Using Calcium and Sodium Hypochlorite
In laboratory experiments, cyanide in waste water from the Muteh gold mine in Iran was oxidized by sodium and calcium hypochlorite to cyanate (CNO − ), which is 1,000 times less environmentally hazardous than cyanide. Experiments were conducted using waste water containing 270 mg/L cyanide over a pH...
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| Veröffentlicht in: | Mine water and the environment 2008-03, Vol.27 (1), p.52-55 |
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| creator | Khodadad, A. Teimoury, P. Abdolahi, M. Samiee, A. |
| description | In laboratory experiments, cyanide in waste water from the Muteh gold mine in Iran was oxidized by sodium and calcium hypochlorite to cyanate (CNO
−
), which is 1,000 times less environmentally hazardous than cyanide. Experiments were conducted using waste water containing 270 mg/L cyanide over a pH range of 6–13 and temperatures between 25 and 50°C. Cyanide was removed completely at a pH of 12.3 at the higher temperatures. The experimental results were simulated in Visual MINTEQ 2003 EPA software using all of the components in the waste water. The model readily predicted most of the chemical reactions in the experiments and explained the mechanism of complexation of cyanide with metals, free cyanide, and cyanide acid formation. |
| doi_str_mv | 10.1007/s10230-007-0024-2 |
| format | Article |
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−
), which is 1,000 times less environmentally hazardous than cyanide. Experiments were conducted using waste water containing 270 mg/L cyanide over a pH range of 6–13 and temperatures between 25 and 50°C. Cyanide was removed completely at a pH of 12.3 at the higher temperatures. The experimental results were simulated in Visual MINTEQ 2003 EPA software using all of the components in the waste water. The model readily predicted most of the chemical reactions in the experiments and explained the mechanism of complexation of cyanide with metals, free cyanide, and cyanide acid formation.</description><identifier>ISSN: 1025-9112</identifier><identifier>EISSN: 1616-1068</identifier><identifier>DOI: 10.1007/s10230-007-0024-2</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer-Verlag</publisher><subject>Activated carbon ; Calcium ; Calcium hypochlorite ; Chemical compounds ; Chemical reactions ; Cyanates ; Cyanide process ; Cyanides ; Detoxification ; Earth and Environmental Science ; Earth Sciences ; Ecotoxicology ; Effluents ; Experiments ; Geology ; Gold ; Gold mines & mining ; Heavy metals ; High temperature ; Hydrogeology ; Industrial Pollution Prevention ; Laboratory experimentation ; Metals ; Mine tailings ; Mineral Resources ; Oxidation ; Sodium ; Sodium hypochlorite ; Technical Communication ; Temperature ; Wastewater ; Water Quality/Water Pollution ; Water treatment</subject><ispartof>Mine water and the environment, 2008-03, Vol.27 (1), p.52-55</ispartof><rights>Springer-Verlag 2007</rights><rights>Springer-Verlag 2008</rights><rights>Springer-Verlag 2007.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a397t-2ac98724813cd50a353d7433db6016ccde07d3ba809186dbd15344d73ae1fb1f3</citedby><cites>FETCH-LOGICAL-a397t-2ac98724813cd50a353d7433db6016ccde07d3ba809186dbd15344d73ae1fb1f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10230-007-0024-2$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10230-007-0024-2$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Khodadad, A.</creatorcontrib><creatorcontrib>Teimoury, P.</creatorcontrib><creatorcontrib>Abdolahi, M.</creatorcontrib><creatorcontrib>Samiee, A.</creatorcontrib><title>Detoxification of Cyanide in a Gold Processing Plant Tailings Water Using Calcium and Sodium Hypochlorite</title><title>Mine water and the environment</title><addtitle>Mine Water Environ</addtitle><description>In laboratory experiments, cyanide in waste water from the Muteh gold mine in Iran was oxidized by sodium and calcium hypochlorite to cyanate (CNO
−
), which is 1,000 times less environmentally hazardous than cyanide. Experiments were conducted using waste water containing 270 mg/L cyanide over a pH range of 6–13 and temperatures between 25 and 50°C. Cyanide was removed completely at a pH of 12.3 at the higher temperatures. The experimental results were simulated in Visual MINTEQ 2003 EPA software using all of the components in the waste water. The model readily predicted most of the chemical reactions in the experiments and explained the mechanism of complexation of cyanide with metals, free cyanide, and cyanide acid formation.</description><subject>Activated carbon</subject><subject>Calcium</subject><subject>Calcium hypochlorite</subject><subject>Chemical compounds</subject><subject>Chemical reactions</subject><subject>Cyanates</subject><subject>Cyanide process</subject><subject>Cyanides</subject><subject>Detoxification</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Ecotoxicology</subject><subject>Effluents</subject><subject>Experiments</subject><subject>Geology</subject><subject>Gold</subject><subject>Gold mines & mining</subject><subject>Heavy metals</subject><subject>High temperature</subject><subject>Hydrogeology</subject><subject>Industrial Pollution Prevention</subject><subject>Laboratory experimentation</subject><subject>Metals</subject><subject>Mine tailings</subject><subject>Mineral Resources</subject><subject>Oxidation</subject><subject>Sodium</subject><subject>Sodium hypochlorite</subject><subject>Technical Communication</subject><subject>Temperature</subject><subject>Wastewater</subject><subject>Water Quality/Water Pollution</subject><subject>Water treatment</subject><issn>1025-9112</issn><issn>1616-1068</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kU1LAzEYhIMoWKs_wFtQ8LaaN9nsx1GqtkLBgi0eQzbJ1pTtpia7YP-9WSsIgoeQCXlmGBiELoHcAiH5XQBCGUmijIemCT1CI8ggS4BkxXHUhPKkBKCn6CyEDSGQZ5SPkH0wnfu0tVWys67FrsaTvWytNti2WOKpazReeKdMCLZd40Uj2w4vpW3iK-A32RmPV99fE9ko22-xbDV-dXqQs_3OqffGeduZc3RSyyaYi597jFZPj8vJLJm_TJ8n9_NEsjLvEipVWeQ0LYApzYlknOk8ZUxXGYFMKW1IrlklC1JCkelKA2dpqnMmDdQV1GyMbg65O-8-ehM6sbVBmSYWN64PAkpesBJYBK__gBvX-zZ2EzRmQ8Z4LDFGV_9SlAPnaVlECA6Q8i4Eb2qx83Yr_V4AEcM-4rCPGOSwj6DRQw-eENl2bfxv8P-mL9bGkW4</recordid><startdate>20080301</startdate><enddate>20080301</enddate><creator>Khodadad, A.</creator><creator>Teimoury, P.</creator><creator>Abdolahi, M.</creator><creator>Samiee, A.</creator><general>Springer-Verlag</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QH</scope><scope>7ST</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8C1</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H97</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>SOI</scope><scope>7TV</scope><scope>H96</scope></search><sort><creationdate>20080301</creationdate><title>Detoxification of Cyanide in a Gold Processing Plant Tailings Water Using Calcium and Sodium Hypochlorite</title><author>Khodadad, A. ; 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−
), which is 1,000 times less environmentally hazardous than cyanide. Experiments were conducted using waste water containing 270 mg/L cyanide over a pH range of 6–13 and temperatures between 25 and 50°C. Cyanide was removed completely at a pH of 12.3 at the higher temperatures. The experimental results were simulated in Visual MINTEQ 2003 EPA software using all of the components in the waste water. The model readily predicted most of the chemical reactions in the experiments and explained the mechanism of complexation of cyanide with metals, free cyanide, and cyanide acid formation.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><doi>10.1007/s10230-007-0024-2</doi><tpages>4</tpages></addata></record> |
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| subjects | Activated carbon Calcium Calcium hypochlorite Chemical compounds Chemical reactions Cyanates Cyanide process Cyanides Detoxification Earth and Environmental Science Earth Sciences Ecotoxicology Effluents Experiments Geology Gold Gold mines & mining Heavy metals High temperature Hydrogeology Industrial Pollution Prevention Laboratory experimentation Metals Mine tailings Mineral Resources Oxidation Sodium Sodium hypochlorite Technical Communication Temperature Wastewater Water Quality/Water Pollution Water treatment |
| title | Detoxification of Cyanide in a Gold Processing Plant Tailings Water Using Calcium and Sodium Hypochlorite |
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