全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

Preliminary Results On The Use Of Clay To Control Pyrodinium Bloom - A Mitigation Strategy

Keywords: Pyrodinium bahamense var compressum , Pyrodinium

Full-Text   Cite this paper   Add to My Lib

Abstract:

The frequent and expanded occurrence of Pyrodinium bahamense var compressum blooms in thePhilippines since 1983 has prompted the need to find mechanisms to control the harmful effects of thesetoxic dinoflagellates. A promising method now being explored is the use of powdered clay mineralswhich when added to the growth media is capable of flocculating with the algal cells. In this study, theefficiency of ball clay, brown bentonite, and Malampaya Sound sediments to remove Pyrodinium cellsin seawater was tested. The addition of 1 g/L of suspended ball clay to 50 mL of cultured Pyrodiniumcells (~1.037 x106 cells/L) removed 99.56% of the algal cells after 2.5 hours. Prolonging the exposuretime to 5 and 24 hours showed no significant increase in flocculation. Brown bentonite and MalampayaSound sediments showed low to moderate removal efficiency not exceeding 70% and 50%, respectively.The effect of ball clay addition on seawater chemistry showed no change in ammonia concentration butnitrate decreased after 5 and 24 hours of clay addition. Results for nitrite and phosphate were howevermore variable.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133