Measurement of the electrostatic charge in airborne particles: II - particle charge distribution of different aerosols

Autor(es)

M. V. Rodrigues ^[1] ; W. D. Marra Jr. ^[2] ; R. G. Almeida ^[3] ; J. R. Coury ^[4]

Afiliação do(s) autor(es)

^[1] Universidade Federal de São Carlos. Departamento de Engenharia Química - Brasil

^[2] Universidade de São Paulo. Departamento de Hidráulica e Saneamento - Brasil

^[3] Universidade Federal de São Carlos. Departamento de Engenharia Química - Brasil

^[4] Universidade Federal de São Carlos. Departamento de Engenharia Química - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Chemical Engineering; v. 23, n. 1, p. 125-133, 2006-03-00.

Resumo

This work gives sequence to the study on the measurement of the electrostatic charges in aerosols. The particle charge classifier developed for this purpose and presented in the previous paper (Marra and Coury, 2000) has been used here to measure the particle charge distribution of a number of different aerosols. The charges acquired by the particles were naturally derived from the aerosol generation procedure itself. Two types of aerosol generators were used: the vibrating orifice generator and turntable Venturi plate generator. In the vibrating orifice generator, mono-dispersed particles were generated by a solution of water/ethanol/methylene blue, while in the rotating plate generator, six different materials were utilized. The results showed no clear dependence between electric charge and particle diameter for the mono-dispersed aerosol. However, for the poly-dispersed aerosols, a linear dependence between particle size and charge could be noticed. (AU)

• Processo FAPESP: 01/03675-1 - Efeito da presenca de cargas eletrostaticas na filtracao de gases.
• Beneficiário: Marcos Vinícius Rodrigues
• Modalidade de apoio: Bolsas no Brasil - Doutorado