Heavy metals complexed with organic ligands are among the most critical carcinogens threatening global water safety. The challenge of efficiently and cost-effectively removing and recovering these metals has long eluded existing technologies. Here, we show a strategy of coordinating mediator-based electro-reduction (CMBER) for the single-step recovery of heavy metals from wastewater contaminated with heavy metal-organic complexes. In CMBER, amidoxime with superior coordinating abilities over traditional ligands is immobilized by an amidoximation reaction onto a flow-through electrode that concurrently functions as a filtration device. This unique process spontaneously captures heavy metal ions at the -N-OH and -NH groups of the amidoxime from their complexes without external energy input (ΔG of amidoxime mediator with Cu(II): -6.59 eV), followed by direct in situ electro-reduction for metal recovery. The reduction of captured Cu(II) to Cu(0) regenerates the amidoxime's active sites, enabling continuous capture of Cu(II). Operating at a voltage of 3 V and a water flux of 250 L m h, the CMBER system achieves a Cu(II) recovery rate of 97.6% and demonstrates an energy efficiency of 340.1 g kWh. This energy efficiency significantly outperforms existing technologies, showing a nearly fivefold improvement. CMBER creates a new dimension for cost-effective resource recovery and water purification.
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http://dx.doi.org/10.1038/s41467-024-55174-1 | DOI Listing |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11686174 | PMC |
Environ Sci Pollut Res Int
January 2025
Water Resources Development and Management, Indian Institute of Technology, Roorkee, Uttarakhand, India.
The rapid urbanization, industrial growth, and socio-cultural activities along riverbanks in hilly cities are transforming land use and intensifying water infrastructure challenges. Paonta Sahib, a culturally significant town in Himachal Pradesh on the Yamuna River, along the foothills of the Himalayas exemplifies these pressures due to its religious tourism, industrialization, and mining activities. This study explores sustainable riverfront development at Paonta Sahib, addressing socio-cultural, environmental, and technical concerns essential for eco-sensitive urban planning.
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December 2024
Intensive Care Research, Royal Adelaide Hospital.
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January 2025
General Surgery Department, Morehouse School of Medicine, Atlanta, GA, USA.
Minimally invasive surgery (MIS) has demonstrated significant clinical and economic benefits that have been consistently validated and reproduced in practice and the literature for the past few decades. These benefits include improved patient outcomes, reduced complications, shorter hospital stays, decreased narcotic use, quicker recovery times, and lower rates of wound infections. However, safety-net hospitals, which historically serve a larger percentage of underserved and marginalized populations, often lack the resources to invest in high capital equipment.
View Article and Find Full Text PDFHeliyon
November 2024
Chongqing University of Science and Technology, Chongqing, 401331, China.
Tight oil is a typical unconventional resource, and enhancing its recovery rate remains a challenge in current development efforts. In this study targeting the Daqing Fuyu tight oil reservoir, we combine a high-temperature and high-pressure long core physical simulation apparatus and a high-temperature and high-pressure online Nuclear Magnetic Resonance (NMR) testing system to conduct indoor simulation experiments on CO huff and puff in long cores. The results indicate that in the process, it is primarily the oil from micro-pores that is initially mobilized, but further along mobilization of fluids from a portion of sub-micro-pores and nanopores is enhanced, with an efficiency ranging from 25 to 33 %.
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January 2025
Center of Implementing Nursing Care Innovations Freiburg, Nursing Direction, Medical Center - University of Freiburg, Freiburg, Germany.
Background: The noise levels in intensive care units usually exceed the recommended limits in (inter)national recommendations. Such noise levels can affect both the recovery of intensive care patients and the performance of staff. The aim of this study was to reduce ward-based noise levels in three intensive care units (anesthesiological, neurological, and neonatological).
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