Struvite
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Staghorn renal stones: what the urologist needs to know
ABSTRACT Patients with staghorn renal stones are challenging cases, requiring careful preoperative evaluation and close follow-up to avoid stone recurrence. In this article we aim to discuss the main topics related to staghorn renal stones with focus on surgical approach. Most of staghorn renal stones are composed of struvite (magnesium ammonium phosphate) a
Int. braz j urol.. Publicado em: 2020-12
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2. Electroanalytical Method for Determination of Trace Metals in Struvite Using Electrochemically Treated Screen-Printed Gold Electrodes
We present an electroanalytical method using square-wave anodic stripping voltammetry on electrochemically-treated screen-printed gold electrodes to the simultaneous determination of lead(II), copper(II) and mercury(II) in struvite (natural fertilizer produced from urine). Electrochemical treatment via cyclic voltammetry of the working electrodes increased s
J. Braz. Chem. Soc.. Publicado em: 2020-09
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3. Nucleação na formação de estruvita: estado da arte
RESUMO Estimativas recentes indicam que a duração de toda a reserva de rochas fosfatadas do planeta não ultrapassa 400 anos e que a produção de fertilizantes nitrogenados é insustentável energeticamente. Atualmente, o tratamento de esgoto está sendo visto como uma unidade de recuperação de recursos (água, energia e nutrientes) em vez de uma de fin
Eng. Sanit. Ambient.. Publicado em: 01/07/2019
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4. Endourologic strategies for a minimally invasive management of urinary tract stones in patients with urinary diversion
ABSTRACT Objective To present our experience in minimally invasive management of urinary tract stones in patients with urinary diversion. Materials and Methods We retrospectively reviewed 26 patients with urinary tract stones after cystectomy and urinary diversion. The types of urinary diversion were ileal conduit, colon conduit, ileal orthotopic neobladde
Int. braz j urol.. Publicado em: 2018-02
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5. Biodisponibilidade do fósforo em compostos e struvite aplicados em solos ácidos
RESUMO O trabalho teve como objetivo caracterizar as formas de fósforo (P) presentes em compostos e em struvite e avaliar a influência dessas formas na biodisponibilidade do P. A fertilização fosfatada efetuou-se com composto obtido de lodos de tratamento de águas residuais (CSS), composto a partir de estrume de galinha (CP) ou struvite (SV) utilizando-
Rev. bras. eng. agríc. ambient.. Publicado em: 2017-07
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6. The challenge of cystine and struvite stone formers: clinical, metabolic and surgical assessment
ABSTRACT Purpose: To compare the clinical, metabolic, and calculi characteristics of cystine and struvite stone patients after percutaneous nephrolithotripsy (PCNL). Material and Methods: Between January/2006-July/2013, 11 cystine stone patients were treated in our clinic. Of those, 3 were excluded due to incomplete follow-up. Eight cystine stone patients
Int. braz j urol.. Publicado em: 2016-10
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7. EFFECT OF CONTINUOUS CRYSTALLIZER PERFORMANCE ON STRUVITE CRYSTALS PRODUCED IN REACTION CRYSTALLIZATION FROM SOLUTIONS CONTAINING PHOSPHATE(V) AND ZINC(II) IONS
Abstract Continuous reaction crystallization of struvite from aqueous solutions containing phosphate(V) (1.0 mass %) and zinc(II) ions (from 0.1 to 2.0 mg kg-1) in a continuous DT MSMPR crystallizer was investigated. The influence of pH (9 - 11) and mean residence time (900 - 3600 s) on the product characteristics and its chemical composition was tested. Str
Braz. J. Chem. Eng.. Publicado em: 2016-06
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8. Production of struvite from beverage waste as phosphorus source
In this work was investigated the influence of pH on the synthesis of struvite using cola beverage waste as source of phosphorus. The process was operated in a batch reactor. The reaction time was 20 minutes, and the chemicals MgCl2.6H2O and NH4Cl were used in the experiment, with a molar ratio of Mg+2:NH4+:PO4(3-) = 1:1:1. The products were characterized by
Mat. Res.. Publicado em: 13/11/2012
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9. REMOÇÃO DE NITROGÊNIO OU FÓSFORO PRESENTE EM EFLUENTES AGROINDUSTRIAIS PELA PRECIPITAÇÃO DE ESTRUVITA / REMOVAL OF NITROGEN AND PHOSPHORUS PRESENT IN AGROINDUSTRIAL EFLUENTES BY PRECIPITATION OF STRUVITE
Tendo em vista a potencialidade do emprego de processo fisico-químico no tratamento de efluentes, este projeto teve por objetivo estudar a remoção de fósforo e nitrogênio presente em efluentes como de dejetos líquidos de suínos, frigoríficos de abate de bovinos (sangue bovino) e descartes de refrigerantes. A tecnologia empregada na remoção de nitro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2011
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10. Remoção de nitrogênio amoniacal de lixiviado de aterro de resíduos sólidos por precipitação química com formação de estruvita / Ammonium-nitrogen removal from leachate of solid waste landfill by chemical precipitation with struvite formation
Municipal solid waste landfilling is the best final disposal method due to its low operating cost and minimizing environmental impacts. As a result of degradation of the solid waste, leachate is generated and it is characterized by high concentrations of organic matter, ammonia nitrogen and inorganic salts which has high pollution potential. In this context,
Publicado em: 2010
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11. Remoção de fósforo do líquido de descarte do desaguamento do lodo de estações de tratamento de esgoto mediante precipitação de estruvita / Phosphorus removal from sludge water discharge of wastewater treatment plants by struvite precipitation
A presente pesquisa estudou a viabilidade do emprego de sais de magnésio em estações de tratamento de esgoto sanitário visando a remoção do fósforo, bem como a produção de estruvita, mineral que pode ser utilizado diretamente no solo como fertilizante. As estações estudadas nesta pesquisa foram a Estação de Tratamento de Esgoto Sanitário de Fra
Publicado em: 2010
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12. Tratamento físico-químico de lixiviado de aterro sanitário pré-tratado por processo biológico aeróbio. / Physico-chemical treatment of landfill leachate from pre-treated by aerobic biological process.
Landfill leachates present high ammonia and organic matter concentrations, besides other pollutants, which do not allow its discharge to the environment without a previous treatment. Older landfill leachates, with more stabilized organic matter, present great pollutant potential, mainly due to the presence of recalcitrant substances that not often are remove
Publicado em: 2009