Comparing PAC/UF and conventional clarification with PAC for removing microcystins from natural waters
PAC/UF was investigated for removing M. aeruginosa cells and microcystins from natural waters and its performance was compared with the conventional clarification with PAC addition (PAC+C/F/S). Ozonated and clarified waters from Tavira's Water Treatment Plant were used. Both processes achieved...
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| Veröffentlicht in: | Desalination and water treatment 2010-04, Vol.16 (1-3), p.120-128 |
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| container_title | Desalination and water treatment |
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| creator | Campinas, Margarida Rosa, Maria João |
| description | PAC/UF was investigated for removing M. aeruginosa cells and microcystins from natural waters and its performance was compared with the conventional clarification with PAC addition (PAC+C/F/S). Ozonated and clarified waters from Tavira's Water Treatment Plant were used. Both processes achieved an absolute removal of chlorophyll-a, but greater turbidity and microcystins (intra and extracellular) removals were reached by PAC/UF. With PAC/UF, 10 mg/L PAC resulted in a cycle-averaged concentration of microcystins in the permeate (0.72 μg/L MC-LReq) below the WHO guideline value, while the water quality obtained with 15 mg /L PAC+C/F/S was far beyond that guideline value. However, the occurrence of cell lysis during UF (with subsequent release of microcystins and UV254nm absorbing substances) and the preferential removal of high molar mass compounds by coagulation yielded better UV254nm removals by PAC+C/F/S. Natural organic matter showed a small impact onto microcystins removal, with greater effect of some algogenic compounds, but especially of high concentrations of humic and tannic-like compounds. |
| doi_str_mv | 10.5004/dwt.2010.1092 |
| format | Article |
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Natural organic matter showed a small impact onto microcystins removal, with greater effect of some algogenic compounds, but especially of high concentrations of humic and tannic-like compounds.</description><identifier>ISSN: 1944-3986</identifier><identifier>ISSN: 1944-3994</identifier><identifier>EISSN: 1944-3986</identifier><identifier>DOI: 10.5004/dwt.2010.1092</identifier><language>eng</language><publisher>L'Aquila: Elsevier Inc</publisher><subject>Absorption ; AOM ; Applied sciences ; Clarifi cation ; Coagulation ; Desalination ; Drinking water and swimming-pool water. 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Ozonated and clarified waters from Tavira's Water Treatment Plant were used. Both processes achieved an absolute removal of chlorophyll-a, but greater turbidity and microcystins (intra and extracellular) removals were reached by PAC/UF. With PAC/UF, 10 mg/L PAC resulted in a cycle-averaged concentration of microcystins in the permeate (0.72 μg/L MC-LReq) below the WHO guideline value, while the water quality obtained with 15 mg /L PAC+C/F/S was far beyond that guideline value. However, the occurrence of cell lysis during UF (with subsequent release of microcystins and UV254nm absorbing substances) and the preferential removal of high molar mass compounds by coagulation yielded better UV254nm removals by PAC+C/F/S. Natural organic matter showed a small impact onto microcystins removal, with greater effect of some algogenic compounds, but especially of high concentrations of humic and tannic-like compounds.</description><subject>Absorption</subject><subject>AOM</subject><subject>Applied sciences</subject><subject>Clarifi cation</subject><subject>Coagulation</subject><subject>Desalination</subject><subject>Drinking water and swimming-pool water. Desalination</subject><subject>Exact sciences and technology</subject><subject>Guidelines</subject><subject>Microcystins</subject><subject>NOM</subject><subject>PAC/UF</subject><subject>Pollution</subject><subject>Turbidity</subject><subject>Water quality</subject><subject>Water treatment</subject><subject>Water treatment and pollution</subject><issn>1944-3986</issn><issn>1944-3994</issn><issn>1944-3986</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp9kD1rHDEQhpeQQIzt0r2akDRr63OlLc0ROwGDU8S1GM9KjsKudJF0d_jfR8uZ4MZRIw163hnm6boLRi8VpfJqOtRLTlvF6MjfdSdslLIXoxnev3p_7M5L-U3bUVIryU86v0nLFnKIT-TH9ebq4YZAnAimuHexhhRhJji3fx8Q1pocQv21osSnTLJb0n7NLgFzwudSQyzE57SQCHWXW_oA1eVy1n3wMBd3_nKfdg83X39uvvV397ffN9d3PQpDa68RPTUD6Ecz-GkaJ6eVExIoQ88cono0kutRKarF4BkHjn4COspBgDTjIE67z8e-25z-7FypdgkF3TxDdGlXrJZKc2EUa-SX_5Js0HqURgra0P6Ith1Lyc7bbQ4L5GfLqF3l2ybfrvLtKr_xn15aQ0GYfYaIofwLcT6I5t80Th8514zsg8u2YHAR3RSyw2qnFN6Y8BdLpJeq</recordid><startdate>20100401</startdate><enddate>20100401</enddate><creator>Campinas, Margarida</creator><creator>Rosa, Maria João</creator><general>Elsevier Inc</general><general>Desalination Publications</general><scope>6I.</scope><scope>AAFTH</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SU</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>KR7</scope><scope>7ST</scope><scope>7UA</scope><scope>F1W</scope><scope>H97</scope><scope>L.G</scope><scope>M7N</scope><scope>SOI</scope></search><sort><creationdate>20100401</creationdate><title>Comparing PAC/UF and conventional clarification with PAC for removing microcystins from natural waters</title><author>Campinas, Margarida ; Rosa, Maria João</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-7ccf086a7b86fdd9de75e34a01cf1ecc5b84279550736f12a2cfda09463a48963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Absorption</topic><topic>AOM</topic><topic>Applied sciences</topic><topic>Clarifi cation</topic><topic>Coagulation</topic><topic>Desalination</topic><topic>Drinking water and swimming-pool water. Desalination</topic><topic>Exact sciences and technology</topic><topic>Guidelines</topic><topic>Microcystins</topic><topic>NOM</topic><topic>PAC/UF</topic><topic>Pollution</topic><topic>Turbidity</topic><topic>Water quality</topic><topic>Water treatment</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Campinas, Margarida</creatorcontrib><creatorcontrib>Rosa, Maria João</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environmental Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Environment Abstracts</collection><jtitle>Desalination and water treatment</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Campinas, Margarida</au><au>Rosa, Maria João</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Comparing PAC/UF and conventional clarification with PAC for removing microcystins from natural waters</atitle><jtitle>Desalination and water treatment</jtitle><date>2010-04-01</date><risdate>2010</risdate><volume>16</volume><issue>1-3</issue><spage>120</spage><epage>128</epage><pages>120-128</pages><issn>1944-3986</issn><issn>1944-3994</issn><eissn>1944-3986</eissn><abstract>PAC/UF was investigated for removing M. aeruginosa cells and microcystins from natural waters and its performance was compared with the conventional clarification with PAC addition (PAC+C/F/S). Ozonated and clarified waters from Tavira's Water Treatment Plant were used. Both processes achieved an absolute removal of chlorophyll-a, but greater turbidity and microcystins (intra and extracellular) removals were reached by PAC/UF. With PAC/UF, 10 mg/L PAC resulted in a cycle-averaged concentration of microcystins in the permeate (0.72 μg/L MC-LReq) below the WHO guideline value, while the water quality obtained with 15 mg /L PAC+C/F/S was far beyond that guideline value. However, the occurrence of cell lysis during UF (with subsequent release of microcystins and UV254nm absorbing substances) and the preferential removal of high molar mass compounds by coagulation yielded better UV254nm removals by PAC+C/F/S. 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| fulltext | fulltext |
| identifier | ISSN: 1944-3986 |
| ispartof | Desalination and water treatment, 2010-04, Vol.16 (1-3), p.120-128 |
| issn | 1944-3986 1944-3994 1944-3986 |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Absorption AOM Applied sciences Clarifi cation Coagulation Desalination Drinking water and swimming-pool water. Desalination Exact sciences and technology Guidelines Microcystins NOM PAC/UF Pollution Turbidity Water quality Water treatment Water treatment and pollution |
| title | Comparing PAC/UF and conventional clarification with PAC for removing microcystins from natural waters |
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