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نوع الوثيقة |
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مقال في مجلة دورية |
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عنوان الوثيقة |
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Potential use of environmental cyanobacterial species in bioremediation of lindane-contaminated effluents Potential use of environmental cyanobacterial species in bioremediation of lindane-contaminated effluents |
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الموضوع |
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Potential use of environmental cyanobacterial species in bioremediation of lindane-contaminated effluents |
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لغة الوثيقة |
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الانجليزية |
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المستخلص |
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This study investigated the potential degradation of lindane [g-hexachlorocyclohexane (g-HCH)], resulting from agricultural runoff, by
environmental species of cyanobacteria. Cyanobacterial species isolated from the Egyptian Lakes Qaroun and Mariut were exposed,
either individually or as mixtures, to 5 and 10 ppm lindane for 7 days. Growth inhibition or stimulation percentage, as well as the
percentage of lindane removal efficiency (RE), were calculated, and factors controlling both were discussed. Lindane exhibited different
degrees of toxicity or stimulation for the selected cyanobacteria. Stimulation of growth ranged between 0.0- and 13.16-fold higher than
controls, while inhibition ranged between 0.0% and 100%. Results also proved that Mariut species were more resistant to lindane
toxicity than were Qaroun species. Resistance to lindane among Qaroun spp. was in the order Oscillatoria sp. 124Oscillatoria sp.
134Synechococcus sp.4Nodularia sp.4Nostoc sp.4Cyanothece sp.4Synechococcus sp. Among Mariut spp., it was Microcystis
aeruginosa MA14Anabaena cylindrica4Microcystis aeruginosa MA154A. spiroides4A. flos-aquae. Mixed cultures showed varying
sensitivity. Lindane was removed by all the species, either as individuals or mixtures, at both concentrations. The lindane RE percentage
of Qaroun species ranged between 71.6% and 99.6% with a maximum of 98.0–99.6% at 5 ppm, 83.9% and 99.7% at 10 ppm, and
maximum between 95.5% and 99.7%. Mariut species showed an RE percentage of 45.23–100.0% with maximum between 99.23% and
100.0% at 5 ppm and 43.15% and 100.0% at 10 ppm with maximal RE percentage between 99.67% and 100.0%. Mixed culture RE
percentages ranged between 91.6% and 100% at 5 ppm with a maximum range of 99.3–100%, while at 10 ppm, the RE percentage ranged
between 90.4% and 100%, with a maximum range of 96.0–100%. Results indicate the potential of natural resources as efficient agents
for pollution control |
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ردمد |
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00 |
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اسم الدورية |
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International Biodeterioration & Biodegradation |
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المجلد |
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59 |
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العدد |
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3 |
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سنة النشر |
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1428 هـ
2007 م |
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عدد الصفحات |
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14 |
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نوع المقالة |
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مقالة علمية |
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تاريخ الاضافة على الموقع |
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Sunday, June 21, 2009 |
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الباحثون
| إبتسام | Ebtesam | باحث رئيسي | دكتوراه | |
| علي | Ali | باحث مشارك | دكتوراه | |
| عبدالرحمن | Abd El-Rahman | باحث مشارك | دكتوراه | |
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