Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

Publications des scientifiques de l'IRD

Strady Emilie, Vu Bich Hanh Dang, Némery J., Guédron Stéphane, Quoc Tuc Dinh, Denis H., Phuoc Dan Nguyen. (2017). Baseline seasonal investigation of nutrients and trace metals in surface waters and sediments along the Saigon River basin impacted by the megacity of Ho Chi Minh (Vietnam). Environmental Science and Pollution Research, 24 (4), 3226-3243. ISSN 0944-1344

Accès réservé (Intranet IRD) Document en accès réservé (Intranet IRD)

Lien direct chez l'éditeur doi:10.1007/s11356-016-7660-7

Titre
Baseline seasonal investigation of nutrients and trace metals in surface waters and sediments along the Saigon River basin impacted by the megacity of Ho Chi Minh (Vietnam)
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000397004600003
AuteursStrady Emilie, Vu Bich Hanh Dang, Némery J., Guédron Stéphane, Quoc Tuc Dinh, Denis H., Phuoc Dan Nguyen.
SourceEnvironmental Science and Pollution Research, 2017, 24 (4), p. 3226-3243. ISSN 0944-1344
RésuméThe Saigon River, Southern Vietnam, crosses one of the most dynamic developing Megacity in Southeast Asia: Ho Chi Minh City (HCMC). The increased economic, industrial, and domestic developments may affect the environmental quality of water and halicutic resources. In this study, we evaluated the seasonal (dry and wet seasons) biogeochemical state of the Saigon River during two snapshot campaigns conducted along the river basin upstream from HCMC; the Saigon River was characterized by slightly acidic (pH 5.7-7.7) and oxygen-depleted water (dissolved oxygen (DO), 0.36-5.18 mg l(-1)). Nutrients (N-NH4 = 0.01-2.41, N-NO3 = 0.14-2.72, and P-PO4 = similar to 0-0.42 mg l(-1)), DOC (2.2-8.0 mg l(-1)), POC, and trace metal(oid) (As, Cd, Cr, Cu, Zn, and Hg) concentrations were low showing a good quality of the upstream river. In the urban center area, DO dropped to 0.03 mg l(-1) accompanied with a rise of nutrient concentrations (e.g., N-NH4, up to 17.7 mg l(-1)) likely originating from wastewater discharges. Trace metal concentrations also rose sharply (e.g., Cr and Hg rose up to 10-fold higher) in both water and sediments but remained under the World Health Organization (WHO) and Vietnamese concentration guidelines. In the downstream estuarine area, the intrusion of marine waters diluted water flowing from HCMC, leading water quality to return close to the state observed upstream from HCMC. In general, levels of nutrient and metal contaminations along the Saigon River during both seasons appear moderate regarding to Vietnamese and WHO guidelines although the urban area is highlighted as the major contributor for metal(oid) emissions. Finally, we showed that apart from wastewater and industrial discharges that affect the river quality, metal(oid) partitioning between solid and solution is controlled by the change in water geochemistry along the continuum during both seasons, such as DO (e.g., for As and Cr) and pH (e.g., for Pb) which drives their sorption/dissolution dynamics.
Plan de classementPollution [038] ; Hydrologie [062]
Descr. géo.VIET NAM ; SAIGON COURS D'EAU ; ZONE TROPICALE
LocalisationFonds IRD [F B010069374]
Identifiant IRDfdi:010069374
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010069374

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Nouméa

Papeete

Niamey

Ouagadougou

Tunis

La Paz

Quito