Rehabilitation Following Industrial Contamination: Jauá Lake, a Coastal Wetland in Camaçari, Bahia, Brazil

Silva, E. M. da; Barros, Arthur; Navarro, Magdalena; Mota, M. F. V.; Cotsifis, P.; Chastinet, Carla B.A.

doi:10.1007/978-94-011-4683-8_21

Cited by 5 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Groundwater inflow is the primary source of water input to the wetland system. A more detailed description of Dunas Lake is given in da Silva et al (2000Silva et al ( , 1999aSilva et al ( , 1999b.…”

Section: Dunas Lake: General Description and Origin Of Contaminationmentioning

confidence: 99%

“…Additionally, the concentrations of dissolved iron and sulphate and the subsequent precipitation of humic acids increased. These changes affected the transparency of the water and disrupted the biological communities in the pond (da Silva et al, 2000(da Silva et al, , 1999a(da Silva et al, , 1999b. The contamination plume in the groundwater did not reach Jauá Lake, which maintained its original characteristics and has been considered to represent a reference site (da Silva et al, 2000).…”

Section: Dunas Lake: General Description and Origin Of Contaminationmentioning

confidence: 99%

“…In 1992, a rehabilitation program was initiated to restore groundwater and surface water quality as well as to reduce the levels of contamination regarding to acidification (da Silva et al, 2000(da Silva et al, , 1999a(da Silva et al, , 1999bGomes, 1994). Initially, 34,000 Mg of residues were removed; groundwater was continuously pumped out to reduce the contamination plume, which was discharged through a marine outfall; and 16,400 m 3 of industrial waste and approximately 15,500 m 3 of domestic waste were hydraulically encapsulated in the dune (da Silva et al, 2000(da Silva et al, , 1999a(da Silva et al, , 1999bGomes, 1994). The residues confinement consisted of a cover layer with three sub-layers of soil, composed of a 20 cm uniform eolian sand, 40 cm of a poorly compacted layer of residual soil, product of the weathering of a granite/gneiss bedrock and, a 60 cm of compacted material similar to the previous one, from top to bottom.…”

Section: Rehabilitation Plan and Monitoringmentioning

confidence: 99%

See 2 more Smart Citations

The natural rehabilitation of an anthropogenically acidified tropical Lake: Two decades of monitoring

et al. 2013

View full text Add to dashboard Cite

The rehabilitation of a pond after approximately 20 years of strong acidified conditions due to industrial and domestic waste deposition in its catchment basin is reviewed. We describe in this study the acidification process that occurred in a tropical pond in Northeast Brazil (Dunas Lake), the rehabilitation plan for the pond and the subsequent monitoring conducted over two decades. After the contamination assessment by the late 80s, a rehabilitation plan was carried out in the early 90s, in which the contaminated soil and water have been removed and reduced, respectively. No further attempt to neutralize the water or any remediation has been carried out. A toxicity monitoring plan based on toxicity assays with the fish Poecilia reticulata was employed to verify the natural rehabilitation of the pond. The data on toxicity, pH, conductivity, sulphate and dissolved iron recorded from 1994 to 2010 were also compiled and discussed. The collected data in 2003 and 2004 indicated changes in water quality and from them complementary management actions, namely improvement in the containment plant, were conducted in 2005. Results for toxicity assays and pH results indicated interannual changes in the water quality similar to rainy-dry periods. Moving average approach using pH data clearly showed the recovery process of Dunas Lake as well as the importance of the containment plan to reduce the contamination. Finally, a summary of the recent situation after two decades of rehabilitation is provided.

show abstract

Section: Dunas Lake: General Description and Origin Of Contaminationmentioning

confidence: 99%

Section: Dunas Lake: General Description and Origin Of Contaminationmentioning

confidence: 99%

Section: Rehabilitation Plan and Monitoringmentioning

confidence: 99%

See 1 more Smart Citation

The natural rehabilitation of an anthropogenically acidified tropical Lake: Two decades of monitoring

et al. 2013

View full text Add to dashboard Cite

show abstract

“…These wastes were leached by rainwater percolating through the dunes, thus contaminating the ground-and surface-waters. There was a decrease to pH 1.8 of groundand surface-water and an increase in the concentrations of dissolved iron and sulphate, causing the precipitation of humic acids and leading to highly transparent waters with a concurrent disruption of the biological communities in the lake (da Silva et al, 1999a(da Silva et al, , 2000.…”

Section: Study Sitementioning

confidence: 99%

“…A rehabilitation program was carried out (1992)(1993) to recover groundwater and surface water quality and reduce contamination (Gomes, 1994;da Silva et al, 1999a). Initially, the residues were partially removed and the contaminated dune was sealed with impermeable layers of clay and topsoil (hydraulically encapsulated).…”

Section: Study Sitementioning

confidence: 99%

In situ and laboratory bioassays using Poecilia reticulata Peters, 1859 in the biomonitoring of an acidic lake at Camaçari, BA, Brazil

et al. 2006

View full text Add to dashboard Cite

The suitability and viability of acute in situ bioassays were investigated in the biomonitoring program of an acidic lake contaminated with sulphur residues. Responses of organisms observed in laboratory and in situ bioassays were also assessed to determine whether or not they were similar and comparable, regarding accuracy and precision. Newborn Poecilia reticulata were employed as test organisms and exposed to the same water samples under in situ and laboratory conditions. Mortality/immobility was the endpoint assessed and dead/immobile organisms were counted at various time intervals during exposure. The mean calculated LT50 values and 95% confidence intervals were 1.61 (1.36-1.87) h in the laboratory bioassays and 0.72 (0.55-0.89) h in the in situ bioassays. Statistical comparison of these values revealed a significant difference (p<0.05). In situ bioassays were more accurate than those carried out in the laboratory, demonstrating higher sensitivity and better reproduction of what occurs in nature, while laboratory bioassays were more precise.

show abstract

W

Ritchie¹,

Pond²,

Anthony³

et al. 2005

Encyclopedia of Coastal Science

View full text Add to dashboard Cite

Rehabilitation Following Industrial Contamination: Jauá Lake, a Coastal Wetland in Camaçari, Bahia, Brazil

Cited by 5 publications

References 3 publications

The natural rehabilitation of an anthropogenically acidified tropical Lake: Two decades of monitoring

The natural rehabilitation of an anthropogenically acidified tropical Lake: Two decades of monitoring

In situ and laboratory bioassays using Poecilia reticulata Peters, 1859 in the biomonitoring of an acidic lake at Camaçari, BA, Brazil

W

Contact Info

Product

Resources

About