Method for purifying siliceous sponge spicules in marine sediments

The invention discloses a method for purifying a siliceous sponge spicule in marine sediments, which comprises the following steps of: sequentially carrying out ultrasonic oscillation washing, organic matter and carbonate mineral removal, pure water washing to be neutral, heavy liquid separation, dispersant washing and drying on a marine sediment sample to obtain the siliceous sponge spicule. The method can effectively separate siliceous sponge bone needles in marine sediments and inorganic silicides (such as quartz and the like) in the sediments. After purification by the method, the purity of the siliceous sponge bone needle in the marine sediment reaches 97% or above, the siliceous sponge bone needle in the marine sediment cannot be broken in the experiment process and can keep the original state, the needle breaking rate is smaller than 1%, and the recovery rate of the siliceous sponge bone needle in a sample is larger than 90%. 本发明公开了一种海洋沉积物中硅质海绵骨针提纯方法，将海洋沉积物样品依次经过超声振荡水洗、去除有机质和碳酸盐矿物、纯水清洗至中性、重液分选、分散剂清洗烘干后