Impacts of residual aluminum from aluminate flocculant on the morphological and physiological characteristics of Vallisneria natans and Hydrilla verticillata

Lin, Qingwei; He, Feng; Ma, Jing; Zhang, Yi; Liu, Biyun; Min, Fenli; Zhou, Qiaohong; Wu, Zhenbin

doi:10.1016/j.ecoenv.2017.07.037

Cited by 19 publications

(7 citation statements)

References 31 publications

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“…Outros estudos relataram o efeito do alumínio residual, após o tratamento de águas e efluentes, em macrófitas submersas em um lago na China. Os autores verificaram uma inibição significativa no desenvolvimento morfológico de duas espécies de macrófitas e recomendaram que as concentrações de alumínio sejam reduzidas para não haver riscos ecológicos (Lin et al, 2017). Outro estudo recente examinou a ecotoxicidade de lixiviados resíduos de ETA do alumínio e ferro desidratados em uma espécie de alga verde.…”

Section: Resultsunclassified

Avaliação Preliminar da Qualidade das Águas do Ribeirão Morangueiro por Descarte Irregular de Lodo de Estação de Tratamento de Água

Silveira¹,

Okumura²,

Yamaguchi³

2021

Anu. Inst. Geoc.

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ResumoO objetivo deste trabalho foi avaliar a qualidade da água do ribeirão Morangueiro em Maringá-PR, tendo em vista o descarte irregular de efluentes da lavagem de filtros e decantadores de uma estação de tratamento de água, com geração potencial de concentrações de alumínio anômalas. A determinação dos parâmetros físico-químicos da qualidade da água foi realizada por meio de uma sonda multiparâmetros e a concentração de alumínio foi determinada por absorção atômica por chama. Os resultados obtidos in situ demonstram que os parâmetros físico-químicos analisados apresentaram-se em conformidade com a legislação Brasileira para os parâmetros pH, turbidez, oxigênio dissolvido, sólidos dissolvidos totais, salinidade e temperatura. Porém, foram encontradas concentrações de alumínio muito superiores ao máximo permitido (até 6,6 vezes) para corpos hídricos de classe 2 segundo a resolução CONAMA 357/2005, indicando a alta poluição do ribeirão pela atividade antrópica. Desta forma, foi possível concluir que a qualidade da água do ribeirão Morangueiro está altamente alterada pela presença elevada de alumínio, podendo levar a graves consequências ao longo prazo, sendo necessárias medidas corretivas e estudos mais aprofundados sobre o impacto ambiental dos despejos irregulares.

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Section: Resultsunclassified

Avaliação Preliminar da Qualidade das Águas do Ribeirão Morangueiro por Descarte Irregular de Lodo de Estação de Tratamento de Água

Silveira¹,

Okumura²,

Yamaguchi³

2021

Anu. Inst. Geoc.

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“…The rise in chlorophyll and ammonium nitrogen levels leads to an increase in the number of phytoplankton, which does not favor the retention of TP in sediments, exacerbating the release of sedimentary TP. The primary sources of salinity and SPC in West Lake are Al 3+ , which, after hydrolysis, exhibits strong adsorption capabilities, promoting sediment settling and enhancing phosphorus retention capabilities. , TP flux is significantly positively correlated with sediment OM, T, and STN. Elevated sediment temperatures accelerate mineralization, enhancing microbial activity and leading to the decomposition and release of Fe–P .…”

Section: Analysis and Discussionmentioning

confidence: 96%

“…The primary sources of salinity and SPC in West Lake are Al 3+ , which, after hydrolysis, exhibits strong adsorption capabilities, promoting sediment settling and enhancing phosphorus retention capabilities. 41,42 TP flux is significantly positively correlated with sediment OM, T, and STN. Elevated sediment temperatures accelerate mineralization, enhancing microbial activity and leading to the decomposition and release of Fe− P. 43 In contrast, TP flux is significantly negatively correlated with STP and Fe−P, suggesting that sediments still possess phosphorus storage capacity.…”

Section: Influence Of Environmental Variables On Nutrient Fluxes In S...mentioning

confidence: 92%

Spatiotemporal Variation and Dynamics of Endogenous Nutrient Fluxes from Sediments in Hangzhou West Lake

Yang,

Fang,

Feng

et al. 2023

ACS EST Water

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This study conducts a comprehensive investigation of the sediment dynamics of West Lake. The research finds intricate relationships between sediment nutrient release and various environmental factors. Sedimentological tests suggest that the concentrations of TN, TP, and NH 4 + -N in sediment are mainly influenced by the physicochemical properties of sediment and overlying water. Laboratory experiments uncover that a temperature increase of 2−3 °C can elevate phosphorus efflux from sediment by approximately 15%. The presence of submerged plants, mainly in areas with direct water diversion, is linked to a decrease in nutrient efflux from sediment at a rate of about 25%. Analysis of microbial communities in sediment samples indicates the dominance of Proteobacteria and Bacteroidetes, which are proposed to play a key role in degrading organic matter and nutrient recycling in sediment. The activity of these microorganisms is estimated to reduce the level of nutrient efflux from sediment by 18%. Principal component analysis further verifies the spatial heterogeneity among sampling sites, with the primary principal components explaining 68% of variations. These findings not only provide insights into biogeochemical processes in freshwater ecosystems but also underscore the importance of integrated management to ensure long-term sustainability of aquatic environments.

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“…Polymeric organic flocculants based on acrylic acid are used to accelerate the processes of sedimentation and thickening of floccules [4]. However, the mass use of such flocculants leads to their accumulation in rivers [5] and other water sources, where they enter together with washing waters from settling tanks and filters. Due to their low capacity for biodegradation [6] (ESPR-D-14), this causes risks of accumulation of potentially carcinogenic substance in drinking water to high levels.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Influence of the monomer form of orthosilicic acid on the stability of polyalumosilicon coagulants and their efficiency in the treatment of drinking water

Мандрика

Pasenko

Vereshchak

et al. 2023

EEJET

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The object of the study was polymeric alumino-silicon coagulants modified with the monomeric form of orthosilicate acid. The methods and precursors for obtaining stable solutions of composite alumino-silicon coagulants, as well as the effectiveness of coagulation treatment of a surface source of drinking water, were considered. The samples were obtained in two ways: 1) partial hydrolysis of medium-basic aluminum polyhydroxychloride together with sodium silicate solution (PolyAKKg); 2) mixing highly basic aluminum polyhydroxychloride together with a ready solution of orthosilicic acid with a high (above 50 %) monomer content (PolyAKKz). In the course of research, the problem of the short shelf life of composite alumino-silicon coagulants was solved, which had prevented their industrial implementation in drinking water preparation processes. It was established that the resulting composite coagulants had the following parameters: Al2O3, 8.075–8.725 %; SiO2, 0.058–0.725 %; Al/Si ratio, 20–250; basicity, 41.4–80.7 %. The effectiveness of the obtained composite coagulant and commercial coagulant was tested under laboratory conditions at a surface source of drinking water by reducing turbidity and by the concentration of residual aluminum in the water after coagulation. The results showed that composite coagulants of the PolyAKKz type with the addition of orthosilicic acid with a high monomer content (above 50 %) obtained using methanesulfonic acid hydrolysis as a precursor have higher solution stability compared to other precursors or coagulants of the PolyAKKg type. The study results could be used to design new composite coagulants for the preparation of drinking water from surface sources with high turbidity

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Impacts of residual aluminum from aluminate flocculant on the morphological and physiological characteristics of Vallisneria natans and Hydrilla verticillata

Cited by 19 publications

References 31 publications

Avaliação Preliminar da Qualidade das Águas do Ribeirão Morangueiro por Descarte Irregular de Lodo de Estação de Tratamento de Água

Avaliação Preliminar da Qualidade das Águas do Ribeirão Morangueiro por Descarte Irregular de Lodo de Estação de Tratamento de Água

Spatiotemporal Variation and Dynamics of Endogenous Nutrient Fluxes from Sediments in Hangzhou West Lake

Influence of the monomer form of orthosilicic acid on the stability of polyalumosilicon coagulants and their efficiency in the treatment of drinking water

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