Year: 2019
Type: article
Abstract: ABSTRACT In the Brazilian semiarid region, groundwater usually have high concentration of salts. In order to make these waters suitable for consumption, desalinators have been installed in communities and rural settlements to meet the water demand. However, regardless of the efficiency of the membrane and the installed structure of the desalinators, the reverse osmosis system will produce the drinking water and also the residue with salt concentration higher than the previous water salinity. The sampling of water of wells, purified water, and saline reject was carried out in four expeditions, between October 2013 and November 2014, in seven water treatment facilities of communities and/or rural settlements in the west of Rio Grande do Norte State, Brazil. Determinations included the efficiency of reverse osmosis in water purification and parameters of quality: electrical conductivity, pH, cations and anions, sodium adsorption ratio, calcium/magnesium ratio and the influence of the Langelier saturation index and the Ryznar stability index on the recovery rate of reverse osmosis desalination systems. The results indicate that the average recovery rate for desalination systems was 32.11% in October/November of 2013; 52.42% in February/March of 2014; 41.41% in June/July of 2014, and 33.60% in October/November of 2014.
Source: Desalination and Water Treatment
Authors: Francisco Pio de Souza Antas, Nildo da Silva Dias, Gabriela Cemirames de Sousa Gurgel, Neyton de Oliveira Miranda, Cleyton dos Santos Fernandes, André Moreira de Oliveira, Jacques Carvalho Ribeiro Filho, Osvaldo Nogueira de Sousa Neto, Jayny Myrelle Chagas de Freitas, Luciara Maria de Andrade
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $1,000
OpenAlex ID: W2910132702