Physico‐Chemical Processes

Hua, Bin; Xiong, Huayu; Zhu, Guocheng; Wang, Lei; Yan, Sen Lin; Yang, John; Deng, Baolin

doi:10.2175/106143016x14696400494452

Cited by 11 publications

(2 citation statements)

References 63 publications

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“…Coagulation is an important operational unit in the water treatment process and is a preferred method for the removal of dissolved organic matter (DOM) in the production of drinking water (Dennett et al 1996, Eric Lichtfouse 2019, Hua et al 2016, Matilainen et al 2010. In particular, its application as a pre-treatment step to protect membrane based treatment systems where the presence of DOM results in membrane fouling (Bu et al 2019, Tang et al 2010.…”

Section: Introdutionmentioning

confidence: 99%

Interference of the polyacrylamide coagulant in the fluorescence analysis of dissolved organic matter during water treatment

Zhu

Liu

et al. 2020

Environ Chem Lett

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Removal of dissolved organic matter (DOM) is a major problem in drinking water treatment, as its presence affects color, taste, and odour and during disinfection, carcinogenic by-products can be created.To provide the best DOM removal, detailed characterisation is required and the combination of threedimensional fluorescence excitation-emission matrix spectroscopy and parallel factor modelling has become a popular approach. However, some components in the system may affect the characterization.We tested the influence of popular coagulants, polymeric ferric sulfate and cationic polyacrylamide on the three-dimensional fluorescence excitation-emission wavelength spectra of DOM during coagulation treatment. The parallel factor model revealed 3 fluorophore components (C1, C2, and C3). The organic polymer (cationic polyacrylamide) has a negative influence on monitoring, significantly reducing the uncorrected matrix correlation between fluorescence and DOM for the three components from 0.970, 0.976 and 0.906 to 0.941, 0.944 and 0.617, respectively, and also the linear correlation coefficients for the C1 and C2 from 0.92 and 0.84 to 0.83 and 0.79, respectively. The C3 component, a protein-like material, was the most affected. The results demonstrate the need to consider residual polymer as a potential interference when using fluorescence to assess the degree of success of DOM removal by coagulation.

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Section: Introdutionmentioning

confidence: 99%

Interference of the polyacrylamide coagulant in the fluorescence analysis of dissolved organic matter during water treatment

Zhu

Liu

et al. 2020

Environ Chem Lett

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“…A sedimentação é uma operação unitária de separação sólido--líquido utilizada para a remoção de partículas discretas e floculentas, como sólidos suspensos, partículas coloidais e compostos orgânicos (WANG et al, 2011;HUA et al, 2016). A flotação por ar dissolvido (FAD) geralmente é uma alternativa à sedimentação, pois, com instalações mais compactas, pode permitir a mesma eficiência de remoção.…”

Section: Introductionunclassified

Estudo da coagulação/floculação de água com turbidez moderada na sedimentação e flotação por ar dissolvido

Lopes

Silva

Moruzzi

et al. 2020

Eng. Sanit. Ambient.

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RESUMO Os processos de formação, crescimento, ruptura e rearranjo dos flocos que ocorrem durante a coagulação/floculação influenciam, significativamente, a eficiência da remoção dos agregados no tratamento de água. Por isso, é importante estudar as propriedades dos flocos, que são alteradas continuamente durante a floculação e podem interferir na subsequente remoção das partículas. Neste trabalho foi avaliada a eficiência de remoção de turbidez por meio da sedimentação e da flotação por ar dissolvido (FAD), com o uso de aluminato de sódio como agente coagulante. Adicionalmente, a etapa de floculação foi monitorada usando imagens obtidas por método não intrusivo. A FAD proporcionou melhor resultado de remoção de turbidez, de 93%, mostrando robustez como etapa no processo de tratamento de água. Na etapa de floculação, o tamanho dos flocos variou de 0,03 a 0,53 mm, com maior concentração de partículas nas menores classes de tamanho monitoradas. O estudo da dimensão fractal mostrou que o aumento da intensidade da mistura acentuou a ruptura (Dmédio de 0,2 mm para 20 s-1 para Dmédio de 0,1 mm para 40 s-1) nos flocos, promovendo o surgimento de flocos menos compactos. A FAD se mostrou menos sensível às variações de tamanho dos agregados quando comparada à sedimentação.

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Exploring possible strategies for treating SARS-CoV-2 in sewage wastewater: A review of current research and future directions

Jeelani¹,

Munawar²,

Basha³

et al. 2023

Hygiene and Environmental Health Advances

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Physico‐Chemical Processes

Abstract: This review is on the research literature published in 2015 related to the physico-chemical processes for water and wastewater treatment. The review is divided into six sections, including filtration, sedimentation, coagulation/flocculation, flotation, oxidation, and adsorption.

Cited by 11 publications

References 63 publications

Interference of the polyacrylamide coagulant in the fluorescence analysis of dissolved organic matter during water treatment

Interference of the polyacrylamide coagulant in the fluorescence analysis of dissolved organic matter during water treatment

Estudo da coagulação/floculação de água com turbidez moderada na sedimentação e flotação por ar dissolvido

Exploring possible strategies for treating SARS-CoV-2 in sewage wastewater: A review of current research and future directions

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