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Titolo:
Inorganic ion levels of soils and streams in some areas of Ogoniland, Nigeria as affected by crude oil spillage
Autore:
Onyeike, EN; Ogbuja, SI; Nwinuka, NM;
Indirizzi:
Univ Port Harcourt, Dept Biochem, Nutr & Toxicol Unit, Port Harcourt, Nigeria Univ Port Harcourt Port Harcourt Nigeria l Unit, Port Harcourt, Nigeria
Titolo Testata:
ENVIRONMENTAL MONITORING AND ASSESSMENT
fascicolo: 2, volume: 73, anno: 2002,
pagine: 191 - 205
SICI:
0167-6369(200201)73:2<191:IILOSA>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOXICITY;
Keywords:
crude oil spillage; inorganic ions; Ogoniland; soils and streams;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Onyeike, EN Univ Port Harcourt, Dept Biochem, Nutr & Toxicol Unit, PMB 5323, Port Harcourt, Nigeria Univ Port Harcourt PMB 5323 Port Harcourt Nigeria t, Nigeria
Citazione:
E.N. Onyeike et al., "Inorganic ion levels of soils and streams in some areas of Ogoniland, Nigeria as affected by crude oil spillage", ENV MON ASS, 73(2), 2002, pp. 191-205

Abstract

The inorganic ion concentrations of soils and streams in the three locations (Yorla, Zaakpon and Goi) in Ogoniland, Nigeria affected by crude oil spillage were investigated. In general, inorganic ion concentrations of polluted soils and streams varied significantly (p = 0.05) from those of unpolluted soils and streams. Anions such as nitrate (NO3-), sulphate (SO42-) and chloride (Cl-) showed significantly (p = 0.05) higher values in the pollutedsoils and steams than in the unpolluted controls. The phosphate (PO43-) values were lower in the polluted soils and streams than in the unpolluted controls. PO43-, NO3-, SO42- and Cl- concentrations were generally significantly (p = 0.05) higher in soils and streams from Yorla, Zaakpon and their control than in Goi North, Goi South and Goi control. Exchangeable cations and trace metal concentrations were significantly (p = 0.05) higher in the polluted soils and streams than in the unpolluted controls. Yorla and Zaakponpolluted soils and streams had higher concentrations of the exchangeable cations and trace metals compared to values from Goi, except for Na. Resultsalso showed significantly higher values of heavy metals (Pb, Cd, Cr and Ni) in the polluted soils compared to their controls, and values were also significantly (p = 0.05) higher in Yorla, Zaakpon and their control compared to Goi North, Goi South and Goi control. Values obtained in polluted streams were higher than in the unpolluted though not significant at the 5% level(p = 0.05). The anionic and cationic concentrations of Yorla and Zaakpon soils and streams were generally higher than those of Goi, indicating that Yorla and Zaakpon areas were more polluted than Goi. Although the concentrations of most of the anions and cations analysed in the polluted soils and streams were within the World Health Organisation's permissible values for the protection of humans and environment, the streams of Yorla, Zaakpon and Goi are in general being polluted with inorganic ions. This may make these soils and streams unacceptable for domestic and industrial uses if not treated, and soils (farmlands) may also become unsuitable for agricultural purposes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 18:29:43