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About 10,000 papers for “Streaming current”

streaming current

2008

Citation: 'streaming current' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.S06049 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial usage of the compendium should be directed to IUPAC.

Cited by 0

[Streaming current of waterworks sludge].

Zong Dong-liang, Xihui Zhang, Guangming Zhang · PubMed · 2004

The applicability of streaming current in waterworks sludge treatment as indicator of coagulant dosage and pH control was investigated in this study. Experiments were conducted on sludge settling behaviors and dewatering processes. At the aspect of sludge settleability research showed the theoretical optimal dosage, pH was 8.9mg/L, 7.25, and the practical optimal dosage, pH was 9.0mg/L, 6.90. On the side of sludge dewaterability, the theoretical optimal dosage, pH was 25.0mg/L, 9.25, and the practical optimal dosage, pH was 26.0mg/L, 9.0. Results indicated that slightly positive streaming current coincided with the optimal dosage and pH. Thus streaming current can be used for continuous dosage feedback control as the single indicator.

Cited by 1

Streaming Current or Particle Charge Analyzer

W. F. Gerdes, B. G. Lipták · 2018

In water or waste treatment, the streaming current detector (SCD) can estimate treatment demand or continuously control the addition of coagulation chemicals by detecting the surface charge on particles. Lowering the pH of a sample shifts its SCD reading upscale, and increasing the salt content by adding a balanced, neutral salt shifts the reading toward zero. In the usual treatment plant, the SCD may continuously control the feed of cationic chemicals. Batch samples to be taken to the SCD should be adequate to permit rinsing the apparatus several times. The SCD controller set point determination is based on downstream turbidity measurement. For continuous control, the SCD measurement signal is fed to a two-mode controller which modulates the chemical feed pump or control valve. If there is an existing flow proportioning control for the chemical feed, the SCD controller can influence its ratio set point in a cascade arrangement.

Cited by 0

Coagulatation control by streaming current detector

Deysiane Antunes Barroso Damasceno · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · 2019

Equipamentos medidores de corrente de fluxo (streaming current detector - SCD), à semelhança de medidores de potencial zeta, fornecem informações sobre a carga superficial de dispersões coloidais / suspensões e têm sido utilizados em estações de tratamento de água no controle da coagulação. Neste caso, a dose ótima de coagulante e a carga correspondente da água decantada, pré-determinadas pelo ensaio de jarros, servem como ponto de ajuste para a coagulação e qualquer oscilação do valor da carga da água coagulada em torno do valor ótimo indica excesso ou deficiência de dosagem de coagulante, permitindo que as correções sejam realizadas rapidamente. Procurou-se neste trabalho identificar amplitudes de variação de turbidez e de carga elétrica da água bruta que, efetivamente, acarretariam alterações na dose de coagulante, isto é, determinar set points de carga elétrica que indicassem a dose ótima de coagulante em diferentes intervalos de turbidez da água bruta e, assim, tornar menos frequentes ou mesmo substituir os ensaios de jarros. Para tanto, foram realizados ensaios de jarros que simulavam a operação da estação de tratamento de água da Universidade Federal de Viçosa: ciclo completo, vazão média de 30 L/s, coagulação com sulfato de alumínio líquido. As variáveis analisadas foram: turbidez, cor verdadeira, potencial zeta, carga e pH das amostras de água bruta e decantada; turbidez e cor verdadeira da água filtrada e; pH e potencial zeta da água coagulada. Os testes aconteceram ao longo de um ano hidrológico contemplando, portanto, períodos de chuva e seca. Os resultados apontaram que a medida de carga, bem como de potencial zeta, não é capaz de indicar variações na qualidade da água bruta que requeiram alteração na dose de coagulante. Entretanto, as doses ótimas de coagulante, correspondentes às maiores eficiências de remoção de turbidez na decantação se deram em valores de carga e de potencial zeta próximos à neutralidade. A remoção de turbidez na filtração também foi melhor quando as medidas de carga e de potencial zeta da água afluente aos filtros se aproximaram da neutralidade.

Cited by 0Open access

Non Equilibrium Thermodynamic Studies on Membrane Phenomena "Streaming Potential and Streaming Current"

Saurabh Srivastava · International Journal of Science and Research (IJSR) · 2022

Streaming potentials and streaming currents developed during the streaming of water and aqueous solutions of NaCl, KCl and MgCl2 in the concentration range 10-4 to 10-4 mol/l through progesterone plug membrane have been measured and their dependence on applied pressure differences has been investigated. The results have been explained on the basis of the theory of non-equilibrium thermodynamics. It has been observed that streaming potentials and streaming currents both depend linearly on applied pressure differences and Saxen?s relationship holds good.

Cited by 0Open access

Technique of streaming current detection and applications

Paul H. Cardwell · Environmental Science & Technology · 1967

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTechnique of streaming current detection and applicationsPaul H. CardwellCite this: Environ. Sci. Technol. 1967, 1, 6, 482–487Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue 1 June 1967https://pubs.acs.org/doi/10.1021/es60006a002https://doi.org/10.1021/es60006a002research-articleACS PublicationsRequest reuse permissionsArticle Views75Altmetric-Citations4LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Cited by 4

Streaming current measurements in zirconia‐coated capillaries

Myriam Bonose, Louis Renaud, P. Kleimann et al. · Electrophoresis · 2004

The electroosmotic flow created in zirconia-modified capillaries has been previously investigated. In this paper, we compared the electroosmotic data set with streaming current measurements and we related all these data through zeta-potential. Streaming current measurements give an excellent indication on the direction and the value of the electroosmotic mobility of an electrolyte/capillary system for a large set of experimental conditions: 2 < pH < 12, 0 < ACN < 80 %, 10(-4) M < [SO(2- )4 ] < 4 x 10(-2) M. A good correlation between zeta-potential from streaming current measurements and zeta-potential from electroosmotic mobility measurements was observed (r2 = 0.95). However, the values obtained from streaming current were always slightly lower than the one calculated from electroosmotic mobility (slope = 0.86, sigma = 0.06). In zirconia-coated capillaries the zeta-potential can be tuned from -50 to +100 mV depending on the composition of the electrolyte.

Cited by 4

Controlled Flocculation Studies by Streaming Current Measurement

Dipak Shah, Bhogi B. Sheth · Drug Development and Industrial Pharmacy · 1978

The streaming current technique was investigated for the measurement of particle charge in aqueous dispersions. The initial phase of the investigation dealt with the study of relevant measurement parameters in order to develop a measurement procedure for obtaining reproducible charge measurements. The streaming current measurement technique was applied to the study of controlled floccula-tion of aqueous dispersions of microcrystalline silica and of bismuth subnitrate. A profile of streaming current as a function of added electrolyte was obtained for these dispersions. Sediment height and redispersibility measurements were also recorded for these dispersions. It was found that the sediment height and redispersibility behavior of these dispersions as a function of added electrolyte was consistent with the particle charge conditions as indicated by the streaming current profile.

Cited by 2

Streaming in Malta : current practices and future prospects

Borg, Mark G., Falzon, Joseph M. · OAR@UM (University of Malta) · 1989

One of the most controversial issues in education is whether or· not primary and secondary school- children should be taught in streamed classes. This paper proposes to consider some of the criticisms directed at the practice of streaming as an organisational policy in Maltese state schools; it will also provide an evaluation of the system of streaming at the primary level vis-a-vis some of its major criticisms. Finally, some of the major organizational alternatives to streaming will be considered.

Cited by 0Open access