Porous Adsorbents Cross-Linked with Waste Polystyrene Foam and 3,3′,4,4′-Biphenyltetracarboxylic Acid Dianhydride for the Effective Removal and Enrichment of Cationic Dyes
Source abstract
Abstract
Postconsumer solid waste has received wide attention in the development of raw materials for innovative products. In this paper, waste polystyrene (WPS) foam was employed as a starting material to react with 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) to synthesize a series of hyper-cross-linked polymers (HPB- s ). The maximum adsorption capacities of the hyper-cross-linked adsorbents were 3082.2 and 3279.4 mg g –1 for malachite green (MG) and safranine T, respectively. The kinetics and isotherms were more consistent with the pseudo-second-order and Freundlich models, and the thermodynamic data indicated that the adsorption process was heat-absorbing and spontaneous. Furthermore, HPB-2 still maintained a complete shape and a high adsorption capacity after five adsorption–desorption cycles. More importantly, the adsorption studies for three binary mixed dye systems showed that HPB-2 exhibited efficient and selective adsorption behavior toward cationic dyes from water. The present work demonstrates that HPB-2 has promising potential in purifying dye wastewater.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Covalent Organic Framework Applications · Metal-Organic Frameworks: Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China
Funding
National Natural Science Foundation of China · Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University
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