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Çѱ¹¼öÀÚ¿øÇÐȸ / v.40, no.9, 2007³â, pp.723-734
ºÎÀ¯µÈ ±¤¹°¼º ÀÔÀÚÀÇ Ä§°­ ¼Óµµ¿¡ °üÇÑ ½ÇÇè
( Experiment on Settling Velocity of Suspended Mineral Particles )
±èÁ¾¿ì; °æºÏ´ëÇб³ °ø°ú´ëÇÐ °Ç¼³°øÇкÎ;
 
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º» ¿¬±¸´Â Á¡Âø¼º ÅðÀû¹° ¿¹Ãø¿¡ °¡Àå Áß¿äÇÑ ÀÎÀÚÀΠħ°­¼Óµµ¸¦ °­ Ç׸¸ Àú¼öÁö ±×¸®°í È£¼ö¿¡ ³ì¾ÆÀÖ´Â À̿ $(Na^+,;Cl^-,;OH^-,;H^+)$ÀÇ Ã·°¡ ¹× ¹ÐµµÀÇ º¯È­ ¾Æ·¡ ½Ç½ÃµÇ¾ú´Ù. Á¤¼ö Áß¿¡ ºÎÀ¯µÈ ¹Ì¸³ÀÚ(alumina¿Í quartz)ÀÇ Ä§°­ ¼Óµµ´Â ¾Ð·Â¼¾¼­(ÃÖ´ë 10 mbar)·Î ÃøÁ¤µÇ¾ú´Ù. ÃÊ±â ³óµµ 20 g/l¿¡¼­ alumina¿Í quartzÀÇ Æò±Õ ħ°­¼Óµµ´Â ¹Ì¸³ÀÚÀÇ ÀÀÁýÇö»ó ¶§¹®¿¡ ÃÖ°í °ªÀ» º¸¿´À¸¸ç, À̶§ °¢°¢ ÃÖ´ë Æò±Õ ħ°­¼Óµµ´Â 0.185 mm/s(alumina)¿Í 0.022 mm/s(quartz)ÀÌ´Ù. ±× ÈÄ Áõ°¡µÈ Ãʱâ³óµµÀÏ °æ¿ì °£¼·Ä§°­ ¶§¹®¿¡ ħ°­¼Óµµ´Â °¨¼ÒÇÏ¿´´Ù. ¶ÇÇÑ Áõ°¡µÈ ¿°ºÐ¿¡¼­ µÎ ¹Ì¸³ÀÚÀÇ Æò±Õ¼Óµµ´Â Áõ°¡ÇÏ¿´´Ù. ´õ±¸³ª aluminaÀÇ Æò±Õ ħ°­¼Óµµ´Â »ê¼º¿¡¼­ °¨¼ÒÇÏ´Ù°¡ ¾ËÄ®¸®¼º¿¡¼­´Â °­ÇÑ ÀÀÁýÇö»ó ¶§¹®¿¡ ³ô°Ô ÃøÁ¤µÇ¾ú´Ù. ±×·¯³ª quartzÀÇ Æò±Õ ħ°­¼Óµµ´Â ¾ËÄ®¸®¼º¿¡¼­ ³·Àº °ªÀ» º¸¿´´Ù.
This study was to investigate the settling velocity which is an important factor for the prediction of cohesive deposition under the various densities of particle and dissolved ion addition$(Na^+,;Cl^-,;OH^-,;H^+)$ in rivers, ports, reservoirs and lakes. Settling velocity of suspended fine particles in still water was measured with a pressure sensor (maximum 10 mbar). At the initial concentration of 20g/l of alumina and quartz the average settling velocities were high due to the aggregation behaviour of particles. At this point it was 0.185 mm/s (alumina) and 0.022 mm/s (quartz). Above this initial concentration it was on the decrease owing to the hindered settling. The higher the salinity is, the faster the settling velocity of alumina and quartz is. Furthermore, in an acid condition the average settling velocity of alumina was on the decrease. In an alkaline water, which causes strong flocculation, the average settling velocity of alumina it was observed on the increase. However, in an alkaline medium the low average settling velocity of quartz powder was measured.
 
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³óµµ;ÀÀÁý;°£¼·Ä§°­;ºÎÀ¯µÈ ¹Ì¸³ÀÚ;concentration;flocculation;hindered settling;suspended fine particles;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.40, no.9, 2007³â, pp.723-734
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200734515981580)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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