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Character and change in the hydrophilic properties of quartz sand
Author(s) -
Tschapek M.,
Wasowksi C.,
Falasca S.
Publication year - 1983
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19831460305
Subject(s) - quartz , calcination , contact angle , adsorption , chemical engineering , amorphous solid , layer (electronics) , character (mathematics) , natural (archaeology) , chemistry , materials science , organic chemistry , geology , composite material , catalysis , engineering , paleontology , geometry , mathematics
Although quartz sand with its amorphous surface layer covered with OH groups is completely hydrophilic per se , the contact angle of water with it is > 0°. Natural sand (marine or soil) apparently contains organic hydrophobic substances adsorbed from air and water; this decreases its hydrophilicity, which is not restorable by acid washing and calcination. The H 2 O 2 treatment of acid‐washed sand restores its natural hydrophilicity.