Monolithic scaffolds for highly selective ion sensing/removal of Co(ii), Cu(ii), and Cd(ii) ions in water

Abstract

High exposure to metals, such as cobalt (Co), copper (Cu) and cadmium (Cd), potentially has adverse effects, and can cause severe health problems, leading to a number of specific diseases. This study primarily aims to monitor, detect, separate, and remove the trace concentrations of Co(II), Cu(II), and Cd(II) ions in water, without a preconcentration process, using aluminosilica optical sensor (ASOS) monoliths. These monolithic scaffolds with advantageous physical features (i.e., large surface area-to-volume ratios of the scaffolds, active acid sites and uniform mesocage cubic pores) can strongly induce H-bonding and dispersive interactions with organic chelating agent, resulting in the formation of stable ASOS. In this engineering process, ASOS offers a simple and one-step sensing/capture procedure for the quantification and visual detection of the target elements from water, without requiring sophisticated instrumentation. The key result in this study is the ion selectivity exhibited by the designed ASOS toward the targets, Co(II), Cu(II), and Cd(II) ions, in environmental and waste disposal samples, as well as its reproducibility over a number of analysis/regeneration cycles. These findings can be useful in the fabrication of ASOS can be tailored to suit various applications.

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

“…Uptake efficiencies for MSA-1, MSA-2, and MSA-3 were calculated as % (C A /C 0 ), where C A is the target ion concentration uptake by solid MSAs and C 0 is the initial target ion concentration. Results indicated that the functionalities of the wagon-wheel-shaped MSAs were maintained over eight regeneration/reuse cycles 46,47 .…”

Highly Selective Fluorimetric Turn‐Off Detection of Copper(II) by Two Different Mechanisms in Calix[4]arene‐Based Chemosensors and Chemodosimeters

“…The juxtaposition of copper ions as biologically necessary and environmentally toxic means that selective and sensitive monitoring of copper ions is important for human health and industrial activity . In this context Cu(II) selective chemosensors and chemodosimeters are highly prized and a variety of detecting platforms have been developed including gold and carbon nanoparticle probes, mesoporous materials and enzymatic systems . Whilst transition metal ion sensors generally rely on metal ion binding, chemodosimetric Cu(II) detection is receiving increasing attention.…”

Antibacterial Activity of Magnesium Oxide Nano‐hexagonal Sheets for Wastewater Remediation

“…Sewage usually receives mixed effluents from industries, households, and hospitals; these effluents pollute water sources with a widespread mixture of highly pathogenic microorganisms and toxic chemicals . Consequently, providing safe technology for wastewater treatment has received significant attention and became an urgent concern for public health particularly in areas where contaminated water sources are used for different applications such as fish farms and crop irrigation, thereby eventually affecting the farmers and consumers .…”