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http://dx.doi.org/10.17663/JWR.2018.20.3.227

Physical Characteristics of Floc Density of Suspended Fine Particles in accordance with the Cohesiveness  

Choi, In Ho (Department of Civil Engineering, Seoil University)
Kim, Jong Woo (Department of Civil Engineering, Seoil University)
Publication Information
Journal of Wetlands Research / v.20, no.3, 2018 , pp. 227-234 More about this Journal
Abstract
This paper was examined the physical characteristics of floc density of suspended fine particles with varying cohesiveness. The analysis of floc density was performed in a small annular flume with a free water surface under different bed shear stresses and ion addition. Fine-grained silica was used as model material, as it is the main mineral components of clay that affects sedimentation. It was concluded that floc density depended on increasing the bed shear stress, the salinity and pH value. Floc density decreased with increasing the salinity in still water and floc size, whereas the opposite was true when increasing the bed shear stress. Also, it increased at pH6.8 more than at pH4.2 when increasing the bed shear stress in the range from 0.0086 to $0.0132N/m^2$.
Keywords
Suspended fine particles; Floc density; Annular flume; Shear stress;
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Times Cited By KSCI : 4  (Citation Analysis)
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1 Gibbs, RJ (1985). Settling velocity, diameter, and density for flocs of illite, kaolinite, and montmorillonite. J. of Sedimentary Research, 55(1), pp. 65-68. https://doi.org/10.1306/212F860C-2B24-11D7-8648000102C1865D
2 Hwang, KN, Kim, NH and Lee, YH (2008). The laboratory study on estimation of depositional properties of kaolinite sediments on saltwater condition. J. of Korea Water Resources Association, 41(9), pp. 863-872. [Korean Literature] DIO:10.3741/JKWRA.2008.41.9.863   DOI
3 Hwang, KN and Yang, SH (2007). A laboratory study on depositional properties of kaolinite sediments. J. of the Korean Society of Civil Engineers, 27(6b), pp.676-687. [Korean Literature].
4 Kim, JW and Nestmann, F (2009). Settling behavior of fine-grained materials in flocs. J. Hydraul. Res. 47(4), pp. 492-502. https://doi.org/10.1080/00221686.2009.9522025   DOI
5 Krone, RB (1962). Flume studies of the transport of sediment in estuarial shoaling processes. Final Rep., Hydr. Engr. Lab. and Sanitary Engr. Res. Lab., Univ. of California, Berkeley, June.
6 Kuroda, Y, Nakaishi, K and Adachi, Y (2003). Settling velocity and structure of kaolinite floc in sodium chloride solution. Clay Science, 12, pp. 103-107. https://doi.org/10.11362/jcssjclayscience1960.12.103
7 Lee, SC (1995). Response of mud shore profiles to waves. PhD thesis, University of Florida, May.
8 Lee, YJ, Lee, SH, Hwang, KN and Ryu, HR (2005). A study on settling properties of cohesive sediments in Shihwa lake. J. of Korean Society of Coastal and Ocean Engineers, 19(4), pp. 42-48. [Korean Literature]
9 Lim, BG and Son, MW (2016). Study on applicability of fractal theory to cohesive sediment in small rivers. J. Korea Water Resour. Assoc. 49(10), pp. 887-901. [Korean Literature] DIO:10.3741/JKWRA.2016.49.10.887   DOI
10 Choi, IH and Kim, JW (2015). Depositional behavior of finegrained particles with varying cohesiveness. J. of Korean Society Hazard Mitigation, 15(4), pp. 251-259. [Korean Literature] http://dx.doi.org/10.9798/KOSHAM.2015.15.4.251   DOI
11 Choi, IH and Kim, JW (2016). A study on effects of salinity on deposition and erosion of cohesive sediments. J. of Korean Society Hazard Mitigation, 16(5), pp. 317-324. [Korean Literature] http://dx.doi.org/10.9798/KOSHAM.2016.16.5.317   DOI
12 Choi, IH and Kim, JW (2017). Study of settling properties of cohesive sediments. J. of Wetlands Research. 19(3), pp. 303-310. [Korean Literature] DOI https://doi.org/10.17663/JWR.2017.19.3.303   DOI
13 Coletta, TF, Bruell, CJ, Ryan DK and Inyang, HI (1997). Cation-enhanced solutions for the electrokinetic removal of Pb from kaolinite. ASCE J. of Environment 123(2), pp.1227-1233.   DOI
14 Fettweis, M (2008). Uncertainty of excess density and settling velocity of mud flocs derived from in situ measurements. Estuarine, Coastal and Shelf Science, 78, pp. 426-436. https://doi.org/10.1016/j.ecss.2008.01.007   DOI
15 Gibbs, RJ (1982). Floc stability during Coulter counter size analysis. J. of Sediment Petrology. 52, pp. 657-660.   DOI
16 Shen, X and Maa, JP-Y (2017). Floc size distributions of suspended kaolinite in an advection transport dominated tank: measurements and modeling. Ocean Dynamics, 67(11), pp. 1495-1510.   DOI
17 Nasser, MS and James, AE (2009). The effect of electrolyte concentration and pH on the flocculation and rheological behaviour of kaolinite suspensions. J. of Engineering Science and Technology, 4(4), pp. 430-446.
18 Owen, MW (1976). Determination of the settling velocities of cohesive muds. Hydraulic Research Station, Wallingford, Report, IT, 161, pp.1-8.
19 Park, JW (2006). A study on depositional properties of muddy cohesive sediments from Kwangyang bay. M.S, dissertation, Chonbuk National University, Jeonju, R. of Korea. [Korean Literature]
20 Stokes, GG (1851). On the effect of the internal friction of fluids on the motion of pendulums. Trans. Cambrige Philosophical Society, 9(8), pp. 287-298.
21 Tambo, N and Watanabe, Y (1979). Physical characteristics of flocs-I. The floc density function and aluminium floc. Water Research, 13. pp. 409-419. https://doi.org/10.1016/0043-1354(79)90033-2   DOI
22 Von Karman, T (1930). Mechanische Ahnlichkeit und Turbulenz. Nachrichten von der Gesellschaft der Wissenschaften zu Gottingen, Fachgruppe 1(Mathematik), 5, pp. 58-76. [German Literature]
23 Zbik, MS, Smart, RSC and Morris, GE (2008). Kaolinite flocculation structure. J. of colloid and interface science, 328(1), pp. 73-80. https://doi.org/10.1016/j.jcis.2008.08.063   DOI