Assessment of physical-chemical characteristics of water and sediments from a Brazilian tropical estuary: status and environmental implications.
ScientificWorldJournal
; 2012: 676173, 2012.
Article
en En
| MEDLINE
| ID: mdl-22489197
ABSTRACT
The environmental quality of the Jacuípe River's estuary (very important in northeastern Brazil) was assessed during 2007 and 2008. In water, concentrations (mg L⻹) of NO2â» (<0.004 to 0.016), NO3â» (0.01 to 0.33), soluble PO4³â» (<0.02 to 0.22), dissolved oxygen (3.9 to 9.6), total contents (mg L⻹) of Cd (<0.001), Cu (<0.01), Pb (<0.01), and Zn (<0.1), pH (5.60 to 8.00), and electrical conductivity (0.12 to 48.60 mS cm⻹) agreed with environmental standards. In sediments, clay and total organic matter (%, m/m) varied, respectively, from 8.8 to 12.0 and from 1.1 to 8.8, while infrared, thermogravimetric profile, electronic micrograph, as well as X-Ray analyses showed desirable adsorptive characteristics. However, maximum exchangeable levels (mg kg⻹) of Cd (1.3), Cu (44.6), Pb (35.7), and Zn (43.7) and their respective maximum pseudototal concentrations (mg kg⻹) 19.4, 95.1, 68.2, and 30.3 were below the recommended limits. In this sense, it was possible to demonstrate good environmental preservation even with the growing number of industries and touristic activities in the evaluated estuarine area.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Clima Tropical
/
Agua
/
Sedimentos Geológicos
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
ScientificWorldJournal
Asunto de la revista:
MEDICINA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Brasil