Particle deposition and removal

How is particle deposition and removal from the lung influenced by the size of the particles ... 

Sediment deposition is defined as the temporary emplacement of particles on the seabed while sediment accumulation is defined as the net sum of particle deposition and removal processes over a long period. The term sedimentation refers to integrated particle transport to—and emplacement—on the seabed, as well as removal, and preservation. 

Sediment accumulation the net sum of particle deposition and removal processes over... 

Itano M, Kern FW Jr, Kawanabe I, Miyashita M, Rosenberg RW, Ohmi T. Particle deposition and removal in wet cleaning processes for semiconductor manufacturing. IEEE Trans Semicond Manuf 1992 5 114-120. 

Particle Deposition and Removal from the Collector Electrodes... 

Figure 2.1 Schematic (not to scale) of particle deposition and removal during forward and reverse filtration. (From Redkar and Davis [1]).

In this chapter, direct visual observations of particle deposition and removal during crossflow microflltration are described. We start with early work in which particle deposition and cake formation were observed from the side, and then consider more recent studies where video and still photomicrographs were taken from below or above the membrane. The chapter ends with observations of particle removal by backpulses, followed by concluding remarks. The interested reader is also referred to prior reviews of non-invasive, in situ membrane monitoring by Chen, Li and Fane [2] and Chen, Li and Elimelich [3]. 

Materials. Lead acetate [99.99%] and thioacetamide [99+%] were purchased from Aldrich and used without further purification. Carboxylate-modifided polystyrene (PS-CO2) microspheres were obtained from Seradyn (Indianapolis, IN). Microspheres were used, as is, without removing die proprietary surfactant. The surfiictant was found not to interfere wifii deposition and removing the surfactant lead to increased aggregation of the particles. Anhydrous edianol was obtained from Burdick Jackson (Muricegon, MI). 

In some cases, data are available from which we can obtain a relative characterization of particle adhesion to paint and varnish coatings. Such a relative characterization was given in [213] the deposition and removal of the contaminants were performed under identical conditions. The coatings were ranked in decreasing order of adhesion number as follows melamine-alkyd enamel ML-12-18 (98%) penta-phthalate white enamel PF-115 (94%) red alkyd-nitro-enamel EP-51 (64%) grey chlorinated PVC enamel KhV-113 (57%). It will be noted that the chlorinated PVC enamel KhV-113 gave the least retention of contaminants. 

Particle deposition and aggregation are two close phenomenons. Factors that favor particle removal by deposition often tend to favor aggregation and subsequent removal by settling. In the case of very small particles (<2 nm) the simplified assumptions commonly applied in theoretic considerations of particle attachment may no longer be valid. 

Transport, Deposition, and Removal of Fine Particles Biomedical Applications... 

In this chapter, the fundamentals of particle transport, deposition, and removal are described, and sample compntational results are presented and discussed. This is followed by a discussion of some biomedical and environmental applications. 

Applications of particle transport, deposition, and removal are described in this section. 

---