水溶液中硅质絮状沉淀物的实验研究

EXPERIMENTAL RESEARCHES ON DOWNY SILICEOUS PRECIPITATE IN AQUEOUS SOLUTIONS

陈传平 梅博文 马亭 蔡春芳

Chen Chuanping Met Bowen Ma Ting Cai Chunfang

有机酸对硅酸盐矿物溶解后的实验水溶液和玻璃容器内存放的有机酸水溶液在常温常压下放置后,中性水溶液中出现絮状沉淀物,为二氧化硅的凝聚物.不同的酸溶液酸度增加,有利于水溶液中二氧化硅的稳定存在.与二氧化硅形成稳定环状络合物的低分子量有机酸,可阻止二氧化硅的凝聚.

Downy Precipitate appeared in several aqueous solutions under ambient condition for some time.These solutions were orgsnic acids contained in glass vessels and experimental aqueous samples gotten with silicate rock gtains dissolved in organic acid solution. The main compeition of the Precipitate was known as cement of silica after analysis. The research results show that the stability of silica in the liquid increases with the increase of acidity of the liquid, and some low-molecular-weight organic acids which could form stable ring complexes with silica could stop the cementation of silica in liquid.

10.11743/ogg19940407