Evaluation of surface water quality in aquatic bodies under the influence of uranium mining (MG, Brazil)

Rodgher, Suzelei; Azevêdo, Hélio; Ferrari, Carla Rolim; Roque, C.V.; Ronqui, Leilane Barbosa; Campos, Michelle Burato; Nascimento, Marcos Roberto Lopes do

doi:10.1007/s10661-012-2719-5

Cited by 30 publications

(20 citation statements)

References 37 publications

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“…Degradation of surface water conditions, as reflected in the water quality status, has become an issue of environmental concern worldwide (Silva Soldán and Badurová 2013;Santos et al 2013;Rodgher et al 2013). Many countries now use a Water Quality Index (WQI) to assess the condition of waterbodies (Pesce and Wunderlin 2000;Jonnalagadda and Mhere 2001;Bordalo et al 2006;Rahman et al 2011;Horton 1965;Sanchez et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Aquaculture Water Quality Index: a low-cost index to accelerate aquaculture development in Indonesia

Tallar

Suen

2015

Aquacult Int

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Due to a lack of the related data, there were no simple water indexes available for indicating water quality. Motivated by the fact that many lakes and reservoirs in Indonesia have been polluted because of aquacultural activity, this paper proposed a Water Quality Index, called the Aquaculture Water Quality Index (AWQI), and presented the development of practical tool to aid the development of aquaculture in Indonesia. Specific purposes included: (a) providing a brief summary of the assessment results of the existing WQI; (b) developing the AWQI method for applying in an aquacultural context; (c) implementing the AWQI method in Depok Area (Indonesia) as study area. An AHP method was also processed to define the weights of selected water quality parameters: DO, ammonia, pH, and fecal coliform. The AWQI had several features: (a) a low-cost water quality monitoring program that could be used by developing countries; (b) a useful tool for water resource agencies, especially for local agencies, to manage waterbodies and to raise public awareness of water pollution for its data, as its data could be easily understood and interpreted.

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Section: Introductionmentioning

confidence: 99%

Aquaculture Water Quality Index: a low-cost index to accelerate aquaculture development in Indonesia

Tallar

Suen

2015

Aquacult Int

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“…A DAR é causada pela oxidação da pirita presente no material estéril e/ou rejeitos, podendo continuar ocorrendo muitos anos após a inativação da mina. Na região de estudo, segundo Campos et al (2011), Comissão das Águas (2012) e Rodgher et al (2013), a DAR é caracterizada pelo baixo pH e elevadas concentrações de fluoreto (F-), manganês (Mn), sulfato (SO4-2), terras raras (ETR), zinco (Zn), urânio (U) e rádio (Ra), entre outros elementos. No CIPC, a cava da mina, o bota-fora 4 (BF4) e o botafora 8 (BF8) destacam-se como os três principais pontos onde a drenagem ácida ocorre.…”

Section: Figura 1 Mapa De Articulação Da áRea De Estudo: (A) Imagem unclassified

ASSINATURAS ISOTÓPICAS DE Pb NA AVALIAÇÃO DO IMPACTO AMBIENTAL CAUSADO PELO LANÇAMENTO DO EFLUENTE TRATADO PELO COMPLEXO MÍNERO INDUSTRIAL DO PLANALTO DE POÇOS DE CALDAS NA REPRESA DE ÁGUAS CLARAS E RIBEIRÃO DAS ANTAS

Vecchia

Rodrigues

Ladeira

2017

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A área de estudo relaciona-se com o Complexo Mínero Industrial do Planalto de Poços de Caldas (CIPC), gerador de um efluente ácido que, após tratado, é descartado na Represa de Águas Claras que devido à ineficiência do processo de precipitação e subdimensionamento dos tanques de decantação, tem atuado como uma espécie de bacia de retenção dos contaminantes. A represa verte no Ribeirão das Antas que atravessa a cidade de Poços de Caldas, localizada a jusante do empreendimento minerário. De forma a se produzir diagnósticos mais fiéis à área de estudo, considerando-se os vários processos ocorridos e a correlação entre elemento e a fonte que a originou (geogênica ou antropogênica), a ferramenta isotópica de Pb, através dos isótopos estáveis 204Pb, 206Pb, 207Pb e 208Pb, foi utilizada para obter informações sobre a atuação dos elementos radioativos U e Th, naturalmente presentes na região e intensificados pela drenagem ácida de rocha (DAR). As informações obtidas possibilitaram avaliar o impacto ambiental causado pelo lançamento do efluente ácido tratado pelo CIPC em sedimentos da Represa de Águas Claras e do Ribeirão das Antas. As assinaturas isotópicas de Pb das amostras de sedimentos foram comparadas às assinaturas de rochas preservadas e, coletadas dentro e fora da cava da mina Osamu Utsumi, as quais representam o registro do ambiente geogênico e/ou natural. A utilização dos diagramas 208Pb/204Pb versus 206Pb/204Pb e 206Pb/207Pb versus 1/Pb, possibilitou o diagnóstico de ambientes com influências antrópicas em urânio (U) e de fontes geogênicas na área de estudo.Palavras-chave: Isótopos estáveis de Pb, assinaturas isotópicas, sedimentos, identificação de fontesAbstract: SIGNATURES Pb ISOTOPIC IN EVALUATING THE ENVIRONMENTAL IMPACT CAUSED BY WASTEWATER TREATED BY LAUNCH COMPLEX MINERO INDUSTRIAL OF POÇOS CALDAS WELLS OF PLATEAU IN CLEAR WATERS OF DAM AND RIBEIRÃO ANTAS. The study area is related to the Industrial the Mining Complex of Poços Caldas Plateau (CIPC), generating an acid effluent, after treated, is disposed in Clearwater Dam that due to the inefficiency of the precipitation process and undersize of settling tanks, it has acted as a kind of contaminant retention basin. The dam spills in Ribeirão das Antas through the city of Poços Caldas, located downstream of the mining enterprise. In order to produce more faithful to the study site diagnostics considering the various occurring processes and the correlation between the element and the source from which it originated (geogenic or anthropogenic), isotopic tool Pb through 204 Pb stable isotope 206Pb , 207Pb and 208Pb, was used to obtain information about the activities of radioactive elements U and Th, naturally present in the region and intensified by acid drainage rock (DAR). The information obtained allowed assessing the environmental impact of the release of effluent treated by acid CIPC in sediments of Aguas Claras Dam and Ribeirão das Antas. The Pb isotopic signatures of sediment samples were compared to preserved rocks and signatures, collected in and out of the pit of the Osamu Utsumi mine, which represent the registration of geogenic and / or natural environment. The use of diagrams 208Pb/204Pb versus 206Pb/204Pb and 206Pb/207Pb versus 1/Pb, enabled the diagnosis of environments with anthropogenic influences uranium (U) and geogenics of sources in the study area.Keywords: Lead stable isotopes, isotopic fingerprinting, sediments, source identification

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“…The waste rocks consisted of gibbsite, muscovite, kaolinite, and microcline as well as pyrite and sphalerite. The acid mine water contains mainly sulfate (2400 mg L −1 ), F (100 mg L −1 ), U (8 to 12 mg L −1 ), Mn (up to 170 mg L −1 ), and Zn (41 mg L −1 ) and has a pH of~3.7 (Ladeira and Gonçalves 2007;Rodgher et al 2013), and it is neutralized with limestone (CaCO 3 ) and lime (CaO) at the water treatment unit. The treated water is released into the Águas Claras reservoir whose waters join the Antas creek.…”

Section: Study Area and Samplingmentioning

confidence: 99%

“…Due to the inefficiency of the acid water treatment, contaminants overflow from the settling ponds and end up at the Águas Claras reservoir, leading to a concern about their migration to the environment, mainly to the Antas creek (Rodgher et al 2013). The multiplicity of interactions between the contaminants and the sediments requires a broader approach in order to understand the fixation and/or transport of a wide range of elements, including U.…”

Section: Introductionmentioning

confidence: 99%

Sulfur isotope fractionation and sequential extraction to assess metal contamination on lake and river sediments

2016

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Purpose The present study investigated lake and river sediments affected by metals from an acid mine drainage (AMD) from a former uranium mine. The role of bacterial sulfate reduction in the immobilization of contaminants was evaluated, and the analyses of acid volatile sulfide (AVS) and sequential extraction were performed. Consequently, the potential mobility and bioavailability of contaminants were established. Materials and methods Sulfur isotopic fractionation (δ 34 S), AVS, and sequential extraction procedure were used to assess the sulfate bacterial reduction and the availability of contaminants in the environment at six sampling stations. Results and discussion The δ 34 S indicated that bacterial reduction is a key process in the natural attenuation of contamination in the Águas Claras reservoir, precipitating metal sulfides. According to the USEPA criteria, adverse biological effects are expected for sample S1 (inside the reservoir) which is likely to be toxic, while for sediment S4 (in the river), the toxicity is uncertain. The other samples were classified as nontoxic, likely because of the decreased solubility of zinc sulfide. A decrease in the concentration of the contaminants downstream of the reservoir was observed. The predominance of U (0.4 %) in the labile fraction and the elevated concentrations of Zn (0.5 %) and Mn (0.7 %) in the sediments inside the reservoir raises concerns regarding the availability of these contaminants in the environment. Conclusions The main environmental impact appears to be concentrated in the Águas Claras reservoir, whereas the Antas creek does not seem to be affected by the AMD process. Although the bacterial sulfate reduction is effective in its production of sulfides capable of immobilizing the contaminants, the presence of Zn and U in the labile and reducible fraction is a matter of concern due to its long-term bioavailability. Thus, continuous monitoring of the redox potential of the waters and sediments, mainly in the reservoir, is recommended in order to assess and possibly prevent later dissolution of sequestered contaminants.

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Evaluation of surface water quality in aquatic bodies under the influence of uranium mining (MG, Brazil)

Cited by 30 publications

References 37 publications

Aquaculture Water Quality Index: a low-cost index to accelerate aquaculture development in Indonesia

Aquaculture Water Quality Index: a low-cost index to accelerate aquaculture development in Indonesia

ASSINATURAS ISOTÓPICAS DE Pb NA AVALIAÇÃO DO IMPACTO AMBIENTAL CAUSADO PELO LANÇAMENTO DO EFLUENTE TRATADO PELO COMPLEXO MÍNERO INDUSTRIAL DO PLANALTO DE POÇOS DE CALDAS NA REPRESA DE ÁGUAS CLARAS E RIBEIRÃO DAS ANTAS

Sulfur isotope fractionation and sequential extraction to assess metal contamination on lake and river sediments

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