Adsorption capacity of superabsorbent resin composite enhanced by non-thermal plasma and its adsorption kinetics and isotherms to lead ion in water

Preparation and Properties of Attapulgite/Brucite Fiber-Based Highly Absorbent Polymer Composite

“…The infrared spectrum of HEC is displaye curves a, showing the flat vibrational peak of C-OH at 1334 cm −1 . The distinct peak at 2 cm −1 is assigned to the stretching vibration of aliphatic C-H in HEC [24], which is a apparent in graphs b and c. The anticipated peak at 3449 cm −1 , corresponding to the t scopic vibration of O-H on HEC, exhibits lower intensity in comparison to curves b an This phenomenon arose because the characteristic peaks in curves b and c resulted fr the combined effects of O-H and N-H stretching vibrations [25,26]. Within curves b an distinctive features include the telescopic vibration peaks of O=S at 627 cm −1 and 623 cm the asymmetric telescopic vibration peaks of C-O-C at 1035 cm −1 and 1044 cm −1 , and asymmetric telescopic vibration peaks of COO-at 1408 cm −1 and 1411 cm −1 .…”

Superabsorbent Polymer with Excellent Water/Salt Absorbency and Water Retention, and Fast Swelling Properties for Preventing Soil Water Evaporation

“…In Fig. 1(d), the curve a was the infrared spectrum of HEC, the C-O-C stretching vibration peak (asymmetry and symmetry) at 1036 cm −1 and 915 cm −1 [28], and the plane of C-OH at 1384 cm −1 , the vibration peak disappeared after the polymerization reaction; the aliphatic stretching vibration peak of C-H at 2925 cm −1 still existed in the curve b and curve c [29]; the O-H stretching vibration peak at 3433 cm −1 , increased in intensity compared to the absorption peak in the b curve and c curve [9]; these results indicated that HEC was involved in the chemical reaction. In curve b and curve c, the asymmetric stretching vibration peaks of -COO-at 1404 cm −1 and 1402 cm −1 can be observed, respectively; the stretching vibration absorption peak of sulfonic acid groups O=S at 627 cm −1 and 669 cm −1 , and the vibration absorption peaks at 1642 cm −1 and 1647 cm-1 were the stretching vibration peaks of C=O in the amide group [19,30], indicated that the polyacrylic acid chain and AMPS have been grafted onto the HEC skeleton.…”

“…It can absorb hundreds times or even thousands times of water higher than its own quality and swell into hydrogel, the absorbed water cannot removable under a certain range of pressure [4,5] and has repeated water absorbency capacity, safe and non-toxic, good processing and use performance. Therefore, superabsorbent polymers have been widely used in agriculture and forestry [6,7], medical and health [4,8], adsorption [9][10][11][12], construction [13,14] and petrochemical industry [15], etc. In particular, the use of superabsorbent polymer in soil can not only increase water-holding capacity of soil, but also rmly lock rainwater and irrigation water, slowly release stored water in soil to supply water to crops, thereby enhancing soil water retention [16].…”

Adsorbability Enhancement of Macroporous Resin by Dielectric Barrier Discharge Plasma Treatment to Phenol in Water

“…Recently, nonthermal plasma technology for material modification becomes one of the most active fields [7][8][9]. Nonthermal plasma surface treatment has lots of features, including no change to the thermal and mechanical properties of the adsorbents, but altering the various interfacial characteristics, such as the surface chemical and physical structure properties [10,11].…”