RESUMO
The proliferation of heavy metal ions in water has been a serious problem that has been escalating day by day. Rapid detection of these ions in an aqueous solution is of immense significance to keep them within permissible limit. To address the growing concentration of heavy metal ions, we report a facile and cost-effective sensing scheme. Based on intensity modulation, the sensing scheme comprises of a smartphone, light source, and analyte. The results reveal that the concentration of heavy metal ions can be detected at ppb level. The sensing scheme renders an average limit of detection (LOD) of â¼0.5 ppb for those assessed ions. Further, spiked tap water has also been assessed to check the applicability of the scheme which eventually yields a â¼95% recovery level. Overall, the sensing scheme with minimal logistics is believed to replace the complex analysis procedure executed through bulky and sophisticated instruments.
Assuntos
Metais Pesados , Aplicativos Móveis , Smartphone , Metais Pesados/análise , Água , ÍonsRESUMO
Proliferation of heavy metal ions as aquatic pollutants has been a matter of growing concern now a days. Several anthropogenic activities have fueled higher concentration of heavy metal ions in aquatic bodies above threshold values, as set by World Health Organization. Of late, chitosan for its exquisite properties has been widely used in tackling this burning problem of aquatic pollution caused by heavy metal ions. Accordingly, this mini review appraises the detection as well as diminution activities where chitosan plays the major contributing part. Starting from the intrinsic properties of chitosan, the detection strategy via chitosan composites is comprehensively delineated. Likewise, the removal activities via chitosan mediating agents are also overviewed, followed by future recommendations. It is believed that this mini review will give researchers a brief appraisal of two prominent activities related to controlling of heavy metal ion pollution.
