A static adsorption experiment equipment

Abstract

The invention discloses a static adsorption experiment equipment, which comprises an adsorption bottle, a collection device for collecting the supernatant solution in the adsorption bottle, and a solid-liquid separation device for separating the supernatant solution collected by the collection device, and the adsorption bottle is a spherical bottle; The collection device includes a first monitoring unit, a U-shaped tube inserted on the stopper of the adsorption bottle, and a lifting unit for lifting the U-shaped tube up and down. The inner end of the U-shaped tube extends into the adsorption bottle, and the U-shaped tube The outer end is connected to the liquid inlet of the solid-liquid separation device through a connecting pipe; the liquid inlet of the solid-liquid separation device is connected to the outer end of the U-shaped pipe through a connecting pipe. The present invention has simple structure and good use effect. The adsorption bottle is a spherical bottle. At the same time, the height of the inner end of the U-shaped tube is higher than that of the liquid inlet, which avoids the loss of condensed liquid phase vapor caused by rotating and opening the bottle stopper, and reduces the error of subsequent experimental analysis. Automatic control is realized, the continuity of the experiment process is good, and mass production can be realized, which is convenient for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to an experimental device, in particular to a static adsorption experimental equipment. Background technique [0002] Static adsorption experiment, also known as "shaking flask experiment", is often used in the fields of environmental engineering, hydrogeology, and materials science. It is an aqueous solution, and those with poor water solubility are prepared as solutions using organic solvents) to fully contact, and it is a common means to investigate the amount of the substance to be adsorbed on the adsorption material (that is, the amount of adsorption). The kinetics, isothermal and thermodynamic characteristics of the adsorption process can be obtained by setting the parameters of the adsorption experiment conditions, such as adsorption time, adsorption temperature and the concentration of the substance to be adsorbed, which has important reference value in terms ...

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Problems solved by technology

[0005] In actual operation, there are the following problems: use the Erlenmeyer flask as the container where the adsorption material and the substance to be adsorbed are in full contact. During the oscillation process, the flat wall of the bottle is easy to cause the adsorption material and the substance to be adsorbed to adhere to the wall of the bottle. The additional loss of the liquid phase concentration of the substance to be adsorbed will cause errors in the subsequent experimental analysis; the use of conical flasks will produce splashes when the vibration intensity is high, which will also cause additional losses of the liquid phase concentration of the substance to be adsorbed, while the use of conical flasks When the temperature of the water bath is high, the evaporated liquid phase vapor often pushes away the conical bottle stopper. In addition, it will also condense on the stopper, which will also cause additional losses when pulled out, which will affect the follow-up experiments. The analysis brings errors; it is difficult to fix the Erlenmeyer flask in the constant temperature water bath oscillator, and it is fixed only by the positioning springs in the horizontal and vertical directions of the oscillator, and it is easy to overturn during the oscillation process; because the determination of the concentration of the substance to be adsorbed is basically Both are photometric methods, which have strict requirements on the turbidity of the liquid phase, so the final separation of the solid phase and the liquid phase is very important. When the oscillation is completed and left to stand, the supernatant solution in the Erlenmeyer flask is difficult to take out. Use pouring or pipetting When the liquid pipe blows and sucks, it is easy to generate secondary agitation. The solid phase precipitated at the bottom will cause the supernatant solution to be turbid, which will bring difficulties to the subsequent filtration, reduce the service life of the filter head, and increase the cost; the use of a disposable syringe with a filter head The final solid phase and liquid phase separation are carried out by means of manual operation. Due to problems such as improper manual injection force or serious clogging of the filter head, the filter membrane in the filter head will be broken, and the unseparated supernatant solution enters the liquid container through the syringe, polluting The liquid that has been separated; in the whole static adsorption experiment, except for the constant temperature water bath oscillator, which has a special automatic experimental device, the rest of the operation needs to be done manually, which is labor-intensive and inefficient, especially the final solid phase and liquid phase separation. Often because of the pollution caused by the rupture of the filter membrane in the filter head, it is necessary to repeat the experimental process many times

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