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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.14, no.3, 2005³â, pp.196-202
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¹«±â¿°ÀÇ Á¾·ù ¹× ³óµµ°¡ Polyacrylamide °íÈí¼ö¼º ¼öÁöÀÇ ¼öºÐ Èí¼ö¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Effect of Soluble Salts and Their Concentrations on Water Absorption of Polyacrylamide Hydrogel ) |
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| º» ¿¬±¸´Â »óÅäÀÇ º¸¼ö¼º Áõ°¡¸¦ À§ÇÏ¿© È¥ÇյǴ acrylamide °èÅë °íÈí¼ö¼º ¼öÁöÀÎ Stocksorb C(STSB)ÀÇ ¼öºÐ Èí¼ö Ư¼º, ¼öºÐ Èí¼ö¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â °¢Á¾ ¹«±â¿°ÀÇ Á¾·ù ¹× ³óµµ, STSB°¡ ħÁöµÈ ¿ÜºÎ¿ë¾×¼ÓÀÇ ¹«±â¿° ³óµµ º¯È¸¦ ±¸¸íÇϰíÀÚ ¼öÇàÇÏ¿´´Ù. STSBÀÇ ¼öºÐ Èí¼ö·®Àº Áõ·ù¼ö¿¡ ħÁöÇÑ °æ¿ì ¾à 180 $mL{cdot}g^{-1}$¿´´Ù. 1°¡ÀÇ ¾çÀÌ¿ÂÀ» Æ÷ÇÔÇÑ ¿°ÀÎ $KH_2PO_4,;KNO_3$ ¶Ç´Â $(NH_4)_2SO_4$¸¦ ¿ëÇØ½ÃŲ ¿ë¾×ÀÇ ³óµµ°¡ ³ô¾ÆÁú¼ö·Ï Èí¼ö·®ÀÌ ÀúÇϵǾúÀ¸³ª ¼¼ Á¾·ù ¾çÀÌ¿ÂÀÇ Á¾·ù¿¡ µû¸¥ Â÷ÀÌ´Â Å©Áö ¾Ê¾Ò´Ù. $Ca(NO_3)_2{cdot}4H_2O$ ´Ù¾çÇÑ ³óµµ·Î ¿ëÇØ½ÃŲ ¿ë¾× ¼Ó¿¡ STSB¸¦ ħÁö½ÃŲ °æ¿ì ¼öºÐÈí¼ö´É ÀúÇϰ¡ ½ÉÇÏ¿© 20 $meq{cdot}L^{-1}Ca(NO_3)_2{cdot}4H_2O$ ¿ë¾×¿¡¼ ¾à 25 $mL{cdot}g^{-1}$ ¼öºÐÀ» Èí¼öÇÏ¿´´Ù. $Mg(NO_3)_2{cdot}6H_2O$³ª $MgSO_4{cdot}7H_2O$¸¦ ¿ëÇØ½ÃŲ ¿ë¾×ÀÇ ³óµµ°¡ ³ô¾ÆÁú¼ö·Ï ¼öºÐ Èí¼ö·®ÀÌ ½ÉÇÏ°Ô ÀúÇÏÇÏ¿´°í, 1°¡ÀÇ ¾çÀÌ¿ÂÀÌ Æ÷ÇÔµÈ ¿°À» ¿ëÇØ½ÃŲ ¿ë¾×¿¡¼º¸´Ù ±× Á¤µµ°¡ ½ÉÇÏ¿´´Ù. ±×·¯³ª ¿ä¼ÒÀÇ ³óµµ¸¦ Áõ°¡½ÃŲ ¿ë¾×¿¡¼ÀÇ ¼öºÐ Èí¼ö·®Àº ÀúÇϵÇÁö ¾Ê¾Ò´Ù. ħÁöÀü Hoagland¿ë¾×ÀÇ ³óµµ°¡ ³ô°Å³ª, ħÁö½Ã°£ÀÌ ±æ¾îÁú¼ö·Ï STSB¸¦ ħÁö½ÃŲ ¿ë¾×¿¡¼ÀÇ $K^+$¹× $NH_4^+-N$ÀÇ ³óµµ°¡ Á¡Â÷ ³ô¾ÆÁ³´Ù. Hoagland ¿ë¾×ÀÇ Èñ¼®¹è¼ö¿Í ¹«°üÇÏ°Ô Ä§Áö½Ã°£ÀÌ ±æ¾îÁú¼ö·Ï ¿ÜºÎ¿ë¾×ÀÇ $NO_3^--N,;H_2PO_4^-$ ¹× $SO_4^{-2}$ ³óµµ°¡ ¾à°£ »ó½ÂÇÏ¿´°í, 24½Ã°£ °æ°ú ÈÄ °¢°¢ 5,300, 250 ¹× 1,500 $mg{cdot}L^{-1}$ ³óµµ·Î ºÐ¼®µÇ¾ú´Ù. |
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| This research was conducted to determine the amount of water absorbed by a polyacrylamide hydrogel such as Stocksorb C (STSB), effect of salts on inhibition in hydration of STSB, and the hydrogel effects on changes of nutrient concentration in external solution. Absorption of deionized water by STSB reached a maximum of 180 $mL{cdot}g^{-1}$. Monovalent soluble salts such as $KH_2PO_4,;KNO_3$, and $(NH_4)_2SO_4$ reduced absorption of the hydrogel, but the degrees of inhibition in absorption were similar in three kinds of salts. Twenty milliequivalents per liter of $Ca_{2+};or;Mg_{2+}$ reduced water absorption of STSB to $14%$ compared to those of deionized water. Solution absorption was consistently lower in the presence of divalent cations than in the presence of the monovalent cations. But the absorption was unaffected by the uncharged salt such as urea in all concentrations tested. The final $K^+;and;NH_4^+-N$ concentrations of the solution remaining after absorption by STSB was higher than those of the initial solution. The soaking of STSB to full strength of Hoagland solution resulted in increase of $NO_3^--N,;H_2PO_4^-;and;SO_4^{2-}$ concentrations in external solution compared to initial solution, reaching 5,300, 250 and 1,500 $mL{cdot}g^{-1}$, respectively, at 24 hrs after soaking. |
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| 1°¡ ¾çÀÌ¿Â;2°¡ ¾çÀÌ¿Â;¿ÜºÎ¿ë¾×ÀÇ ¹«±â¿° ³óµµ;concentration in external solution;divalent cation;monovalent cation; |
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»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.14, no.3, 2005³â, pp.196-202
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200504840788039)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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