We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Efficient and Selective Removal of Heavy Metals and Dyes from Aqueous Solutions Using Guipi Residue-Based Hydrogel
Summary
Researchers created a hydrogel material from Chinese herbal medicine residue and chitosan that can effectively remove lead, cadmium, and toxic dyes from polluted water. The material maintained its cleaning ability through at least five reuse cycles. While not focused on microplastics, this type of water treatment technology could be part of broader solutions for removing multiple contaminants, including microplastics, from drinking water sources.
The presence of organic dyes and heavy metal ions in water sources poses a significant threat to human health and the ecosystem. In this study, hydrogel adsorbents for water pollution remediation were synthesized using Guipi residue (GP), a cellulose material from Chinese herbal medicine, and chitosan (CTS) through radical polymerization with acrylamide (AM) and acrylic acid (AA). The characteristics of the hydrogels were analyzed from a physicochemical perspective, and their ability to adsorb was tested using model pollutants such as Pb2+, Cd2+, Rhodamine B (RhB), and methyl orange (MO). The outcomes revealed that GP/CTS/AA-co-AM, which has improved mechanical attributes, effectively eliminated these pollutants. At a pH of 4.0, a contact duration of 120 min, and an initial concentration of 600 mg/L for Pb2+ and 500 mg/L for Cd2+, the highest adsorption capabilities were 314.6 mg/g for Pb2+ and 289.1 mg/g for Cd2+. Regarding the dyes, the GP/CTS/AA-co-AM hydrogel displayed adsorption capacities of 106.4 mg/g for RhB and 94.8 mg/g for MO, maintaining a stable adsorption capacity at different pHs. Compared with other competitive pollutants, GP/CTS/AA-co-AM demonstrated a higher absorption capability, mainly targeted toward Pb2+. The adsorption processes for the pollutants conformed to pseudo-second-order kinetics models and adhered to the Langmuir models. Even after undergoing five consecutive adsorption and desorption cycles, the adsorption capacities for heavy metals and dyes remained above 70% and 80%. In summary, this study effectively suggested the potential of the innovative GP/CTS/AA-co-AM hydrogel as a practical and feasible approach for eliminating heavy metals and dyes from water solutions.
Sign in to start a discussion.
More Papers Like This
Synthesis of recyclable and light-weight graphene oxide/chitosan/genipin sponges for the adsorption of diclofenac, triclosan, and microplastics
Researchers created a lightweight, recyclable sponge made from graphene oxide, chitosan, and genipin that can effectively remove microplastics and pharmaceutical contaminants from water. The sponge maintained its effectiveness through multiple reuse cycles, making it a practical and affordable water treatment option. This type of technology could help reduce human exposure to microplastics and other harmful substances in drinking water.
Polyoxometalate nanocluster-infused triple IPN hydrogels for excellent microplastic removal from contaminated water: detection, photodegradation, and upcycling
Researchers developed a specialized hydrogel infused with copper-based nanoclusters to remove microplastics from contaminated water. The study found that the hydrogel could both adsorb and photodegrade microplastic particles under various conditions simulating real-world water environments. This scalable approach suggests a promising new strategy for tackling microplastic pollution in water bodies.
Nature-derived hydrogel for microplastic removal
Scientists developed a nature-based hydrogel made from chitin and lignin that can remove nanoplastics from wastewater with very high efficiency, absorbing up to 1,791 milligrams of plastic per gram of material. This sustainable, reusable filter could help reduce the amount of tiny plastic particles that reach drinking water and ultimately the human body.
The use of chitosan for water purification from microplastics
Researchers investigated chitosan as a sorbent for removing microplastics from water, analyzing its physicochemical properties and proposing an optimized purification method based on chitosan's sorption characteristics.
Flocculation Properties of Acrylamide‐Grafted Tamarind Polysaccharide on Microplastics and Heavy Metals Ions
Researchers created a modified polysaccharide derived from tamarind — a natural plant material — that acts as an effective flocculant, clumping together PVC microplastics and lead ions from water so they can be removed. Under optimized conditions, the material removed over 91% of PVC microplastics and over 93% of lead ions, with even better performance when both contaminants were present together. This bio-based flocculant offers a sustainable option for treating water contaminated with both microplastics and heavy metals simultaneously.