Method for the discrimination between marine and terrestrial sedimentary environments by selectively extracted exchangeable strontium to barium ratio from terrigenous clastic sediments

Patent metadata

Field	Value
Publication number	US-2020348281-A1
Application number	US-201916533455-A
Country	US
Kind code	A1
Filing date	Aug 6, 2019
Priority date	Apr 30, 2019
Publication date	Nov 5, 2020
Grant date	—

Abstract

A method of selective extracting exchangeable strontium and barium from sediments, comprising, collecting a predetermined quantity of a sedimentary sample, removing biogenic clasts from the predetermined quantity of the sedimentary sample to provide a coarse filtered sedimentary sample, baking the coarse filtered sedimentary sample at a temperature less than 105° C., crushing the coarse filtered sedimentary sample to yield a fine filtered sedimentary sample having a sample grain size of less than 100 mesh, reacting a portion of the fine filtered sedimentary sample in a solution containing at least one of an ammonium acetate reactant and a sodium acetate reactant, measuring a strontium level within a liquid product of the solution, measuring a barium level within the liquid product of the solution and determining a ratio of the strontium level and the barium level of the liquid product.

First claim

What is claimed is:

1 . A method of selective extracting exchangeable strontium and barium from sediments, comprising:
collecting a predetermined quantity of a sedimentary sample;
removing biogenic clasts from the predetermined quantity of the sedimentary sample to provide a coarse filtered sedimentary sample;
baking the coarse filtered sedimentary sample at a temperature less than 105° C.;
crushing the coarse filtered sedimentary sample to yield a fine filtered sedimentary sample having a sample grain size of less than 100 mesh;
reacting a portion of the fine filtered sedimentary sample in a solution containing at least one of an ammonium acetate reactant and a sodium acetate reactant;
measuring a strontium level within a liquid product of the solution;
measuring a barium level within the liquid product of the solution; and
determining a ratio of the strontium level and the barium level of the liquid product.

2 . The method of claim 1 wherein the ratio of the strontium level to the barium level is determined.

3 . The method of claim 1 wherein the ratio of the barium level to the strontium level is determined.

4 . The method of claim 1 wherein the solution is comprised of at least one of between 5% and 50% the ammonium acetate reactant and between 2% and 20% the sodium acetate reactant.

5 . The method of claim 1 wherein the solution is a 1M solution of at least one of the ammonium acetate reactant and the sodium acetate reactant.

6 . The method of claim 1 wherein solid-liquid ratio of the portion of the fine filtered sedimentary sample and an extraction agent of the solution is between 1:50-1:500.

7 . The method of claim 1 wherein the sample grain size of the fine filtered sedimentary sample is less than 150 microns.

8 . The method of claim 1 wherein the baking is at least twelve hours in duration.

9 . The method of claim 1 further comprising at least one of stirring and oscillating the solution for at least 120 minutes.

10 . The method of claim 9 wherein the oscillating is at least one of mechanical and ultrasonic.

11 . A method of extracting strontium and barium from sediments, comprising:
crushing a sedimentary sample to yield a fine sedimentary sample; reacting a portion of the fine sedimentary sample in a solution containing at least one of an ammonium acetate reactant and a sodium acetate reactant; measuring a strontium level within a liquid product; measuring a barium level within the liquid product; and determining a ratio of the strontium level and the barium level of the liquid product.

12 . The method of claim 11 wherein the ratio of the strontium level to the barium level is determined.

13 . The method of claim 11 wherein the ratio of the barium level to the strontium level is determined.

14 . The method of claim 11 wherein the solution is comprised of at least one of 5% to 50% the ammonium acetate reactant and 2% to 20% the sodium acetate reactant.

15 . The method of claim 11 wherein the solution is a 1M solution of at least one of the ammonium acetate reactant and the sodium acetate reactant.

16 . The method of claim 11 wherein a solid-liquid ratio of the fine sedimentary sample and an extraction agent of the solution is between 1:50-1:500.

Assignees

• Nanjing Center Of Geological Survey China Geological Survey
• Univ East China Normal

Inventors

• Wang Aihua
• Wang Zhanghua
• Liu Jiankun
• Zhang Fei
• Li Hualing
• Huang Haibo

Classifications

• G01N33/2028

  Metallic constituents · CPC title

• Y02P10/20

  Recycling · CPC title

• C22B3/04

  by leaching (C22B3/18 takes precedence) · CPC title

• C22B26/20

  Obtaining alkaline earth metals or magnesium · CPC title

• G01N1/44

  Sample treatment involving radiation, e.g. heat · CPC title