Filters
Results 1 - 10 of 952
Results 1 - 10 of 952.
Search took: 0.024 seconds
Sort by: date | relevance |
AbstractAbstract
[en] Previous computation of stability factors of colloidal gold from coagulation data was found to be in systematic error due to an underestimation of the particle concentration by electron microscopy. A new experimental technique was developed for determination of this concentration. Stability factors were recalculated from the previous data using the correct concentration. While most of the previously reported conclusions remain unchanged, the absolute rate of fast coagulation is found to agree with that predicted by the theory. A value of the Hamaker constant was determined from the corrected data
Primary Subject
Record Type
Journal Article
Journal
Journal of Physical Chemistry; ISSN 0022-3654;
; v. 82(25); p. 2710-2711

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The high-rate floc blanket clarification process developed by the Anglo American Corporation of South Africa is capable of continuously clarifying gold and uranium pregnant solutions containing 200-2500 mg/L suspended solids to below 25 mg/L solids at an average rising velocity of 8 m/h at the low process cost of R0,001-0,002 per ton of liquid treated. Overall process cost savings are mainly due to increased polishing filtration cycle times
Primary Subject
Source
113. annual meeting of the American Institute of Mining, Metallurgical and Petroleum Engineers; Los Angeles, CA (USA); 26 Feb - 2 Mar 1984; CONF-840218--
Record Type
Journal Article
Literature Type
Conference
Journal
Preprints, Society of Mining Engineers of AIME; v. 84-152 p. 13
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] In this work an alternative method has been developed which permits to estimate the rate constant of an aggregation process of model colloids (spheric and monodisperse particles) but in an automatic and reliable way, because a longer time is considered during the aggregation process which avoid the uncertainties for the calculation of the initial slopes with very few experimental data. to reach an objective condition a limit time of 20 s was taken and it is necessary to assume a concrete form of the aggregates growing which establishes a square dependency between the optical absorbance and the time. By this fitting it is possible to estimate the coagulation rate constant which is in accordance with that obtained by conventional methods, but now the rate constant is the same and maintains a constant value for a longer time (till 20 s). (Author) 19 refs
Original Title
Desarrollo de un metodo alternativo para la determinacion de constantes cineticas de homocoagulacion a partir de medidas turbidimetricas
Primary Subject
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] It is pointed out that for an aerosol formed initially from radioactive fuel particles and non-radioactive oxide particles and subsequently undergoing both coagulation and deposition, a calculation of airborne radioactivity based solely on the usual equation governing the particle number can lead to incorrect results. A more exact general treatment is formulated for this situation, and analytic results are obtained for a simple collision kernel. (author)
Primary Subject
Record Type
Journal Article
Journal
Annals of Nuclear Energy (Oxford); ISSN 0306-4549;
; v. 8(6); p. 287-294

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Published in summary form only
Original Title
Espectrofotometria de absorcao atomica para a determinacao de zinco em aguas fluviais
Primary Subject
Source
Bahia Univ., Salvador, BA (Brazil). Inst. de Quimica; 179 p; 1989; p. 48; 5. Brazilian Meeting on Analytical Chemistry; Salvador, BA (Brazil); 4-6 Sep 1989; Available from the library of the Comissao Nacional de Energia Nuclear, RJ, Brazil
Record Type
Miscellaneous
Literature Type
Conference
Country of publication
LanguageLanguage
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Gagnon, M.J.; Simard, G.; Leclerc, A.; Peloquin, G., E-mail: mjgagnon@uqac.ca
Light metals 2002 (including McQueen Symposium)2002
Light metals 2002 (including McQueen Symposium)2002
AbstractAbstract
[en] The performance of different polymers used to flocculate red mud particulate materials in the Bayer process can be evaluated on the basis of their efficiency to achieve adequate settling velocities and turbidity levels. In this study, three commercially available flocculants are evaluated under typical conditions found in the last washer of a Bayer plant. The different shear levels are produced by using a modified Couette flow system. Great differences are noticed in the performance of the polymers when they are compared at different dosages and at different shear rate levels. The data collected also suggests that conventional cylinder settling tests may not be adequate to measure the performance of certain types of polymers. (author)
Primary Subject
Source
Lewis, T. (Alcan International Ltd., Kingston, Ontario (Canada)); Metallurgical Society of CIM, Montreal, Quebec (Canada); 954 p; ISBN 1-894475-21-6;
; 2002; p. 13-24; International symposium on enabling technologies for light metals and composite materials and their end-products; Montreal, Quebec (Canada); 11-14 Aug 2002; Available from the Metallurgical Society of CIM, Montreal, Quebec (Canada); 7 refs., 8 figs.

Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The use of radiation induced polymerization should theoritically allow to prepare better flocculants. The testings of several products prepared by such a process shows that better properties are indeed obtained: better efficiencies, lower amounts needed, better overall properties
[fr]
L'utilisation de la polymerisation radioinduite devrait theoriquement permettre la preparation de floculants ameliores. Les essais de differents produits fabriques par ce procede montrent que c'est effectivement le cas: meilleures efficacites, reduction des quantites necessaires, meilleures caracteristiques globalesOriginal Title
De meilleurs floculants par irradiation
Primary Subject
Secondary Subject
Record Type
Journal Article
Journal
Bulletin d'Informations Scientifiques et Techniques; ISSN 0007-4543;
; (no.230-231); p. 199-201

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Nazirmadov, B.; Melikhov, I.V.; Komarov, V.F.
X All-Union seminar 'Chemistry and technology of nonorganic sorbents' Proceedings1986
X All-Union seminar 'Chemistry and technology of nonorganic sorbents' Proceedings1986
AbstractAbstract
[en] Present work is devoted to possibilities to control the sorbents properties on the aggregation stage. Therefore, the connection of kinetics and properties of final aggregates is considered.
Original Title
Vozmozhnosti upravleniya svoystvami sorbenta na stadii agregastii chastist sorbiruyushikh fazi
Primary Subject
Source
Tajik National University, Dushanbe (Tajikistan); 282 p; 1986; p. 132-133; 10. All-Union Seminar on Chemistry and Technology of Nonorganic Sorbents; Dushanbe (Tajikistan); 1986; Available from the library of V.I. Nikitin Institute of Chemistry, Academy of Sciences of the Republic of Tajikistan
Record Type
Miscellaneous
Literature Type
Conference
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The mechanism of the cement setting is given in this work. (O.M.)
Original Title
La prise du ciment
Primary Subject
Source
5 refs.; Common issue of 'Lettres des Departements Scientifiques du CNRS. Chimie, no.65, ISSN 1163-0086' and 'Actualite Chimique, no.3 (March 1998), ISSN 0151-9093'
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A previous treatment of the behaviour of radioactive aerosols is extended to take condensation into account and to cope more accurately with a general multicomponent aerosol. It is pointed out that neglect of the modifications to the conventional approach which are developed here could lead to significant errors. The treatment is illustrated by a simple model possessing analytic solutions. (author)
Primary Subject
Record Type
Journal Article
Journal
Annals of Nuclear Energy (Oxford); ISSN 0306-4549;
; v. 9(9); p. 473-479

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |