River water quality improvement by natural and constructed wetland systems in the tropical semi-arid region of Northeastern Brazil

2001 ◽  
Vol 44 (11-12) ◽  
pp. 599-605 ◽  
Author(s):  
B.S.O. de Ceballos ◽  
H. Oliveira ◽  
C.M.B.S. Meira ◽  
A. Konig ◽  
A.O. Guimarães ◽  
...  
Keyword(s):  
Water Quality ◽  
Constructed Wetland ◽  
Arid Region ◽  
Northeastern Brazil ◽  
Effluent Treatment ◽  
Good Efficiency ◽  
River Bed ◽  
Before And After ◽  
Semi Arid Region ◽  
Semi Arid

The efficiencies of a natural Typha spp wetland (Wn) formed on a river bed and its effluent treatment in a constructed wetland (Wc, subsurface horizontal flow) were investigated in northeastern Brazil (Paraiba State). The Wc system (12 tanks with stone gravel, 4.13 m2, 0.22 m3, 20 Typha spp rhizomes. m-2 each, with 38, 29, and 19 mm.d-1 hydraulic loadings, and 5, 7, and 10 days HRT) was fed daily with effluent from a Wn. Wn removal presented the highest values after Typha spp were cut during the 5th week. Removal values were (1st and 2nd periods or before and after cutting): 75% and 81% BOD5; 10-53% total phosphorus; 13%-55% ammonia; 89%-91% FC; 90-96% coliphages and bacteriophages. Wc removals increased with time with best results on 10d HRT. Removals were also higher in the 2nd period: 74%-78% BOD5; 58%-82% ammonia; 90% FC; 94-98% FS; and 92%-96% coliphages and bacteriophages. Despite the high remaining values of FC (1.4×104 CFU/100 ml) and FX (4×103 CFU/100 ml), the removals were satisfactory and HRT dependent, suggesting a gradual optimization of the system with time. The Wc exhibited good efficiency for improving water quality from polluted river.

Impacts of inter-basin water transfer on the water quality of receiving reservoirs in a tropical semi-arid region

Hydrobiologia ◽  
2021 ◽  
Author(s):  
José Etham de Lucena Barbosa ◽  
Juliana dos Santos Severiano ◽  
Hérika Cavalcante ◽  
Daniely de Lucena-Silva ◽  
Camila Ferreira Mendes ◽  
...  
Keyword(s):  
Water Quality ◽  
Arid Region ◽  
Water Transfer ◽  
Basin Water ◽  
Semi Arid Region ◽  
Semi Arid

Hydrochemistry, δD and δ18O to explain the distribution of water quality in a karst setting in the semi-arid region of Northeast Mexico

2021 ◽  
Vol 80 (1) ◽  
Author(s):  
René Ventura-Houle ◽  
Oscar Guevara-Mansilla ◽  
Glenda Requena-Lara ◽  
Elizabeth Andrade-Limas ◽  
Elisenda López-Altarriba
Keyword(s):  
Water Quality ◽  
Arid Region ◽  
Semi Arid Region ◽  
Δd And Δ18o ◽  
Semi Arid

scholarly journals Ethnopharmacological study of Stryphnodendron rotundifolium in two communities in the semi-arid region of northeastern Brazil

2014 ◽  
Vol 24 (2) ◽  
pp. 124-132 ◽  
Author(s):  
Dayanne Rakelly de Oliveira ◽  
Washington Soares Ferreira Júnior ◽  
Vanessa de Carvalho Nilo Bitu ◽  
Patricia Gonçalves Pinheiro ◽  
Cicero Diego Almino Menezes ◽  
...  
Keyword(s):  
Arid Region ◽  
Northeastern Brazil ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Prevalence and intensity of pentastomid infection in two species of snakes from northeastern Brazil

2007 ◽  
Vol 67 (4) ◽  
pp. 759-763 ◽  
Author(s):  
WO Almeida ◽  
A Vasconcellos ◽  
SG Lopes ◽  
EMX Freire
Keyword(s):  
Arid Region ◽  
Infection Intensity ◽  
W State ◽  
Northeastern Brazil ◽  
Infection Rates ◽  
New Host ◽  
Host Infection ◽  
Semi Arid Region ◽  
New Host Records ◽  
Semi Arid

This study aimed to evaluate the infection rates of snakes by pentastomids in the semi-arid region of Brazil. Fifteen snakes (four Micrurus ibiboboca (Merrem, 1820) and eleven Philodryas nattereri Steindachner, 1870) were collected between January and April of 2005, in the municipality of Crato (07° 14' S and 39° 24' W), State of Ceará, Brazil. Laboratorial analysis of the respiratory tracts of the sampled snakes indicated differences in host infection rates: four individuals of P. nattereri (36.4%) were infected by Cephalobaena tetrapoda Heymons, 1922 (mean infection intensity 1.5 ± 0.28, 1-2) and three specimens (27.3%) by Raillietiella furcocerca (Diesing, 1863) (2.3 ± 1.32, 1-5). Only one individual of M. ibiboboca (25%) was infected by a non-identified species of Raillietiella sp. These are the first data on pentastomid infection in snakes in Northeastern Brazil and both snake species comprise new host records for the pentastomids. The results also indicate that the generalist parasites C. tetrapoda and R. furcocerca share their definitive hosts.

scholarly journals Surface water quality assessment in semi-arid region (El Hodna watershed, Algeria) based on water quality index (WQI)

2021 ◽  
Vol 66 (1) ◽  
pp. 127-142
Author(s):  
Amel Ferahtia ◽  
◽  
Mohammed Tahar Halilat ◽  
Fateh Mimeche ◽  
Ettayib Bensaci ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Assessment ◽  
Water Quality Index ◽  
Arid Region ◽  
Quality Index ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals THERMAL CHARACTERIZATION OF THE FAVELONE DERIVATIVES (CNIDOSCOLUS QUERCIFOLIUS) BY THERMOGRAVIMETRY AND DIFFERENTIAL SCANNING CALORIMETRY

2006 ◽  
Vol 05 (3) ◽  
pp. 8-20
Author(s):  
José Carlos Oliveira SANTOS ◽  
Lionete Dantas NUNES ◽  
Sylvia Berenice NÓBREGA ◽  
Dantas José Pires PUZINSKI ◽  
Antonio Gouveia SOUZA
Keyword(s):  
Differential Scanning Calorimetry ◽  
Arid Region ◽  
Agricultural Practices ◽  
Thermal Characterization ◽  
Northeastern Brazil ◽  
Scanning Calorimetry ◽  
Semi Arid Region ◽  
Derivatives Of ◽  
Semi Arid

A thermal analysis has been applied to characterization of food and food products. Taking into account the problems of desertification and agricultural practices able to provide income to the population at the semi-arid region of Northeastern Brazil, this work presents the results of the chemical, thermal and kinetic characterization by thermogravimetry and differential scanning calorimetry of the seed derivatives of favelone (cnidoscolus quercifolius), aiming at the application of these materials as an alternative of food source for animals and for the human population at this brazilian region.

Hunting, capture, and wildlife use by communities in a semi-arid region of Northeastern Brazil

2021 ◽  
pp. 1-11
Author(s):  
Anna Karolina Martins Borges ◽  
Bruna Dias Pontes Ribeiro ◽  
Rômulo Romeu Da Nóbrega Alves
Keyword(s):  
Arid Region ◽  
Northeastern Brazil ◽  
Wildlife Use ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Natural Regeneration of the Mangrove Vegetation on Abandoned Salt Ponds in Ceará, in the Semi-Arid Region of Northeastern Brazil

Diversity ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 27 ◽  
Author(s):  
Armando Reis-Neto ◽  
Antonio Meireles ◽  
Marília Cunha-Lignon
Keyword(s):  
Natural Regeneration ◽  
Arid Region ◽  
Ecosystem Dynamics ◽  
Shrimp Farming ◽  
Northeastern Brazil ◽  
Integrated Analysis ◽  
Technical Problems ◽  
Mangrove Vegetation ◽  
Semi Arid Region ◽  
Semi Arid

The development of the mangrove in Ceará state, northeastern Brazil, is limited by local environmental and climatic factors, associated with the variables that determine the region’s semi-arid climatic conditions. The same conditions also contribute to the installation of artisanal saltworks in estuarine environments. The artisanal production of salt peaked in the 20th century, but with the decline of this activity, the salt evaporation ponds were abandoned, and have been incorporated back into the natural marine-estuarine environment and colonized by mangrove forests. In the early 2000s, however, the expansion of shrimp farming operations impacted this same environment. The present study was based on a spatiotemporal analysis of the natural regeneration of the mangrove vegetation in abandoned salt pond areas in the Brazilian semi-arid region between 1968 and 2009. The integrated analysis of mangrove ecosystem dynamics and the legislation that regulates the licensing of these economic activities identified a number of technical problems in the formulation and execution of the COEMA resolution 02/2002, which permits the installation of shrimp farms in areas dominated by the mangrove. The findings of the present study reinforce the need for a careful reformulation of the Ceará state environmental legislation, in order to guarantee the maximum possible conservation of the coastal zone.

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