本文采用聚丙烯酸酯型亲水性纳米酸作为吸附剂，用低场核磁研究其对尿素的吸

In this paper, polyacrylate-type hydrophilic nano-acid is used as the adsorbent, and low-field nuclear magnetic field is used to study its adsorption of urea. The average particle size of the nano acid is 40 nm and the content of sulfonic acid groups is 0.28 mmol/g. The formula method is used to process the data. We found that the adsorption speed of the nano acid to urea is very fast, and the maximum adsorption can be reached in 10-30 minutes. When the concentration of urea solution is 20 g/L and the ratio of nano acid to urea solution is 0.1 g/mL, the adsorption efficiency of nano acid is 97.24%, and the adsorption capacity is 194.48 mg/g; nano acid and urea solution When the dosage is 0.005 g/mL, the adsorption capacity of nano acid can reach 312.63 mg/g. When the concentration of urea solution increases to 40 g/L, the adsorption capacity of nano acid can reach 238.52 mg/g. It can be seen that the nano acid has a better adsorption effect on urea.

In this paper, polyacrylate hydrophilic nano acid was used as adsorbent to study its adsorption of urea by low field nuclear magnetic resonance. The average particle size of nano acid is 40 nm, and the content of sulfonic acid group is 0.28 mmol / g. the formula method was used to process the data. We found that the adsorption speed of nano acid on urea is very fast, and the maximum adsorption can be achieved in 10-30 min. When the concentration of urea solution was 20 g / L and the ratio of nano acid to urea solution was 0.1 g / ml, the adsorption efficiency of nano acid was 97.24%, and the conversion capacity was 194.48 mg / g; When the ratio of nano acid and urea solution is 0.005 g / ml, the adsorption capacity of nano acid can reach 312.63 mg / g. When the concentration of urea solution increased to 40 g / L, the adsorption capacity of nano acid could reach 238.52 mg / g. It can be seen that the nano acid has a good adsorption effect on urea.<br>

In this paper, polyacrylate hydrophilic nano-acid was used as adsorbent, and its adsorption to urea was studied by low field nuclear magnetic resonance. The average particle size of nano-acid is 40 nm, and the content of sulfonic acid group is 0.28 mmol/g. By processing the data with formula method, we find that the adsorption rate of nano-acid to urea is very fast, and the maximum adsorption can be achieved in 10-30 min. When the concentration of urea solution is 20 g/L and the ratio of nano-acid to urea solution is 0.1 g/mL, the adsorption efficiency of nano-acid is 97.24%, and the adsorption capacity is 194.48 mg/g; The adsorption capacity of nano-acid can reach 312.63 mg/g when the ratio of nano-acid to urea solution is 0.005 g/mL. The adsorption capacity of nano-acid can reach 238.52 mg/g when the concentration of urea solution increases to 40 g/L .. It can be seen that the nano acid has a good adsorption effect on urea.