Synthesis and characterization of pH-responsive sodium alginate/humic acid composite hydrogels for sustained drug release of l-ascorbic acid.

Addressing the challenges of poor biocompatibility and degradability of artificial drug carriers and poor stability of natural monomer gels in the current pharmaceutical market, this study utilized green natural sodium alginate (SA) and humic acid (HA) as raw materials. SA/HA-Ca hydrogel spheres were prepared using Ca as a crosslinking agent and loaded with l-ascorbic acid (L-AA), and the drug-retardation study was conducted using the droplet method. Various analysis techniques confirmed the formation of a three-dimensional network structure through coordination between HA, SA, and Ca, resulting in hydrogel spheres with good thermal stability.

Study on NO Removal Characteristics of the Fe(II)EDTA and Fe(II)PBTCA Composite System.

Fe complexation wet denitrification technology has become a research hotspot. It is very important to achieve efficient regeneration of the absorbent and increase NO absorption in the Fe complexation system. They are the key to the industrial application of the Fe complexation absorption process.