Molecular engineering of a new method for effective removal of cadmium from water

• Published in: Water research (Oxford) 2024-04, Vol.253, p.121326-121326, Article 121326
• Main Authors: Liu, Ting, Yuan, Xiaomin, Luo, Kun, Xie, Can, Zhou, Liyi
• Format: Article
• Language: English
• Subjects: Adsorption; Cadmium - analysis; Cadmium ion; Edetic Acid - chemistry; Enrichment and removal; Environmental Pollutants - analysis; Fluorescent probe; Functionalized glass slide; Spectrophotometry, Atomic - methods; Wastewater; Water - chemistry; Water Pollutants, Chemical - analysis
• ISSN: 0043-1354; 1879-2448
• DOI: 10.1016/j.watres.2024.121326

•A special composite material (CCPB) was constructed to rapidly enrich and remove Cd2+ in water.•CCPB was continuously reused and its recovery of Cd2+ remains close to 100 % after multiple uses.•CCPB can indicate the removal of cadmium ions by fluorescence signal. Cadmium (Cd) is a widespread and highly toxic environmental pollutant, seriously threatening animal and plant growth. Therefore, monitoring and employing robust tools to enrich and remove Cd from the environment is a major challenge. In this work, by conjugating a fluorescent indicator (CCP) with a functionalized glass slide, a special composite material (CCPB) was constructed to enrich, remove, and monitor Cd2+ in water rapidly. Then Cd2+ could be effectively eluted by immersing the Cd-enriched CCPB in an ethylenediaminetetraacetic acid (EDTA) solution. With this, the CCPB was continuously reused. Its recovery of Cd2+was above and below 100 % after multiple uses by flame atomic absorption spectrometry (FAAS), which was excellent for practical use in enriching and removing Cd2+ in real aqueous samples. Therefore, CCPB is an ideal material for monitoring, enriching, and removing Cd2+ in wastewater, providing a robust tool for future practical applications of Cd enrichment and removal in the environment. A special composite material (CCPB) was designed and synthesized by conjugating a fluorescent indicator (CCP) with a functionalized glass slide. It can effectively remove cadmium ions (Cd2+) from real aqueous samples [Display omitted]