摘要
ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｅｌｅｃｔｒｉｃｐｏｔｅｎｔｉａｌａｔｔｈｅｓｈｅａｒｐｌａｎｅｂｅｔｗｅｅｎｔｈｅｃｈａｒｇｅｄｓｕｒｆａｃｅａｎｄｅｌｅｃｔｒｏｌｙｔｅｓｏｌｕｔｉｏｎｉｓｃａｌｅｄζ－ｐｏｔｅｎｔｉａｌ．Ｗｈｅｎζ＝０，ｔｈｅｐＨ...
The IEP of magnesium aluminum hydroxide was predicted with the modified Yoon′s equation, and the effect of electrolyte on the Y- potential of the sol was studied by electrophoresis method. The results showed that the calculated IEP values with the modified Yoon′s equation agreed well with the experimental ones. With the increase of the ionic radius of monovalent anions (Cl -, Br -, I -) the ζ potential decreased. The same was true for CO 2- 3, SO 2- 4 but the sign of the Y- potential reversed from positive to negative. For Al 3+ , Ca 2+ , Mg 2+ , however, the ζ potential increased with the increase of the concentration of Al 3+ , Ca 2+ , Mg 2+ .
