Lead is a heavy metal considered highly toxic, responsible for causing several health problems as well being extremely harmful to fauna and flora. Given this fact, techniques have been studied the removal of from contaminated water, in which stands out adsorption. In sense, objective study was evaluate potential lead(II) biosorption water by seed husks, seeds pods Moringa oleifera Lam (moringa). Biomass characterized energy-dispersive X-ray spectroscopy, Scanning Electron Microscopy Fourier...

The study aimed to evaluate the potential of rice husk ashes (RHA) as an adsorbent for removing Reactive Black 5 (RB5) dye from water by comparing its performance that a commercial activated carbon (PAC) through kinetic, isotherm, and thermodynamic studies. optimal results were obtained at pH 2.0 using PAC RHA dosages 0.4 15 g L−1, respectively. pseudo-second-order model best described kinetic data, with equilibrium reaching 40 min 120 RHA. Langmuir best-described isotherm calculated maximum...

Invertase from NOVO Nordisk has been immobilized in controlled pore silica particles (diameter: 0.351 mm and mean size: 37.5 nm) by covalent binding with the silane-glutaraldehyde method. The activity of free enzyme (IE) was determined 5% (w/v) sucrose, at 35 to 65ºC pH 3 7. Maximum activities were found range 5 6 for invertase, 4.5 IE. Activity yield IE 24%. Energy Activation (Ea) be a function pH, giving Ea = 7.0 6.86 kcal/mol 5.0 5.5, respectively, whereas enzyme, 6.55 5.93 5.0, respectively.

Abstract The consumption of water that has a high level fluoride can result in dental or skeletal fluorosis, which causes changes the teeth and bones. Thus, this study aimed to verify efficiency reduction groundwater using coagulation with extracts Moringa oleifera Lam seeds (MO) combined microfiltration. Coagulation/flocculation tests were carried out Jar test different concentrations coagulant subsequent treatment by microfiltration membranes. concentration was adjusted 5 mgF ‐ /L pH set...

Cyanobacterial toxins pose a potential threat to human health and wildlife. Effective treatment processes are essential for the removal of these constituents in drinking water. The efficiency two nanofiltration membranes (NF-270 NF-90) cyanotoxins saxitoxin group from water was investigated. In this work, were extracted laboratory culture C. raciborskii added surface A working pressure 8 bar applied. filtration time 180 min used each experiment. Total (100%) identified obtained with NF-90...

Resumo: A preocupação da sociedade com princípios ecoeficientes no tratamento de efluentes vem se destacando nos últimos anos, existem diversos tipos e sistemas para essa finalidade que podem ser usados tanto em propriedades rurais como urbanas. O presente trabalho visa apresentar destacar alguns desses mostram alternativas as comunidades humanas alcancem a sustentabilidade. metodologia utilizada foi buscar na literatura textos científicos área rurais, tal, foram pesquisados bases dados...

The thermal stability and the energy of deactivation free invertase immobilized enzyme (IE) was measured at temperatures in range 35 to 65°C for hydrolysis a 5% w/v sucrose solution. pH 5.0 is stable up 50°C period 4 h. Invertase controlled pore silica by silane-glutaraldehyde covalent method 55ºC, 4.5 same period. For higher follows exponential decay model half-lives are 0.53, 1.80, 13.9 h invertase, 65, 60, respectively. IE 0.48, 1.83, 20.9 h, more than invertase; being 83.1 kcal/mol 72.0 enzyme.

O sulfato de alumínio e o policloreto são coagulantes químicos eficientes para formação flocos em unidades tratamento água. No entanto, estes podem contribuir desenvolvimento da doença Alzheimer pelo residual na água pós-tratamento. Em razão disso, esta pesquisa teve como objetivo verificar a aplicação extrato salino (CaCl2) sementes Moringa oleifera no águas com baixa turbidez, usando flotação por ar dissolvido (FAD). A eficiência do processo foi determinada mediante os parâmetros cor, pH...

Diclofenac sodium is a pharmaceutical that extensively prescribed and consumed worldwide.Consequently, its release into water bodies has become global concern, as it poses ecotoxicity, leading to severe public health environmental problems.A literature research was performed find low-cost adsorbent with cationic characteristics could be used remove anionic contaminants from water, such diclofenac sodium.In view of the above, this work aimed investigate (DFS) removal using eucalyptus wood...

O estudo da percepcao ambiental aliado a atividades de sensibilizacao podem favorecer preservacao e o uso mais sustentavel dos recursos ambientais. Utilizando-se dessas ferramentas Educacao Ambiental, presente qualitativo carater exploratorio investigou as percepcoes ambientais referentes aos hidricos, revelados por alunos um colegio publico no municipio Mandirituba-PR, atraves questionarios relatorios aplicados em sala aula. Como forma sensibilizacao, foram realizadas praticas meio visita...

The organic material from cyanobacteria is a significant precursor to the generation of disinfection byproducts. This study’s aim was evaluate formation assimilable carbon (AOC) in water contaminated with cyanobacteria. Furthermore, AOC related trihalomethanes (THMs) and dissolved (DOC). advanced oxidation process caISOrried out by exposing Microcystis aeruginosa cells (250,000 mL−1) different peroxide dosages (10 100 mg L−1) under ultraviolet radiation. Pseudomonas fluorescens (P-17),...

Nanofiltration membranes are highly effective in removing low-molecular weight compounds, which include the secondary metabolites 2-methylisoborneol (2-MIB) and 1,10-dimethyl trans-9-decalol (Geosmin), produced by cyanobacteria difficult to remove conventional treatment processes. Considering that high retention permeate flux important characteristics process, this study aimed evaluate efficiency of NF90 membrane pretreated with water 50% (v/v) ethanol solution 2-MIB Geosmin, considering...

A vinhaça é um subproduto da produção do etanol que se descartada incorretamente pode causar sérios danos ambientais relacionados com o baixo pH, temperatura, alta DBO e várias substâncias, em grandes quantidades, podem ser tóxicas para vários organismos presentes na água no solo. Fato esse torna preocupante, uma vez a média de território brasileiro ano 2019, foi torno 303,1 bilhões toneladas subproduto. Afim propor alternativa descarte desse resíduo, presente estudo objetivou analisar uso...