Cationic polyacrylamide (PAM) is a commonly used sludge treatment agent, which is widely used in sludge dewatering, solid-liquid separation and other fields. In order to ensure the consistent and reliable quality of PAM, quality inspection is required. In this article, we will introduce a commonly used method for PAM quality inspection.
Sample preparation is the first step in PAM quality testing, ensuring sample representativeness and consistency. Here's how:
1.Remove the PAM sample to be tested and try to avoid contamination or moisture absorption.
2.Place the sample in a dry beaker and remove the appropriate amount of sample with a balance scale.
3.Store the sample tightly sealed to protect it from the outside environment.
The quality of the PAM sample can be preliminarily judged by visual inspection. Here are some cosmetic features to look out for:
Moisture content is one of the important indicators to measure the quality of a PAM sample. The determination of moisture content can be carried out by the following steps:
1.A certain amount of sample is taken, weighed and the initial weight is recorded.
2.The sample is placed in an incubator and dried at a certain temperature for a period of time.
3.Remove the sample and place it in a cooler to cool to room temperature.
4.Weigh again and record the final weight.
5.The moisture content is calculated based on the initial weight and the final weight.
Viscosity is one of the important indicators to evaluate the quality of PAM. The determination of viscosity can be carried out by the following steps:
1.Prepare a sample solution of a certain concentration of PAM.
2.The measurement is performed with a viscometer to ensure that the temperature of the sample and the viscometer is stable.
3.Perform the measurement according to the operating instructions of the viscometer and record the measurement results.
Ionicity is one of the important indicators to evaluate the quality of PAM. The determination of ionism can be carried out by the following steps:
2.Measurements are performed using an ionometer to ensure that the temperature of the sample and the ionmeter is stable.
3.Follow the instructions for the ionometry to perform the measurement and record the measurement results.
Residual monomer is one of the important indicators to evaluate the quality of PAM. The determination of residual monomers can be performed by following these steps:
2.The determination is performed using gas chromatography to ensure that the temperature of the sample and the gas chromatograph is stable.
3.Follow the operating instructions of the gas chromatograph to perform the determination and record the measurement results.
Total solids content is one of the important indicators to evaluate the quality of PAM. The determination of the total solids content can be carried out by the following steps:
2.The sample solution is placed in an incubator and dried at a certain temperature for a period of time.
5.The total solids content is calculated from the initial and final weights.
In this paper, a commonly used quality testing method for cationic polyacrylamide sludge treatment agent is introduced. The method includes sample preparation, visual inspection, moisture content determination, viscosity determination, ionization determination, residual monomer determination, and total solids content determination. Through the determination of these indicators, the quality of PAM can be comprehensively evaluated and its effective application in sludge treatment can be ensured.