Results 21 to 30 of about 12,669 (233)

In Vitro Evaluation of Bio Reduction of Hexavalent Chrome by Marine Microorganisms Isolated in the Cartagena Bay for Wastewater Treatment

Chemical Engineering Transactions, 2021
Contamination problems by heavy metals and specifically by hexavalent chromium generated by different production processes impact aquifers worldwide and require effective remediation methods for their control.
Gustavo Echeverri, Laura Ramirez, Jordan Saez, Andres Escorcia   +3 more
doaj   +1 more source

Removal of Chromium by Using of Adsorption onto Strong Base Anion Resin: Study of Equilibrium and Kinetic [PDF]

آب و فاضلاب, 2011
Chromium is one of the heavy metals that is found in industrial effluents and is very toxic for human and environment. In this work the removal of hexavalent chromium by using of adsorption onto strongly basic anion was investigated.
Mehdi Shirzad Siboni, Mohammad Taghi Samadi, Saeed Azizian, Afshin Maleki, Mansour Zarrabi   +4 more
doaj  

Chromium and leather: a review on the chemistry of relevance for allergic contact dermatitis to chromium

Journal of Leather Science and Engineering, 2020
As other causes decline in importance, chromium-tanned leather has become a more important source for chromium allergy, which affects around 1% of the general population.
Yolanda S. Hedberg
doaj   +1 more source

Redox‐Dependent Luminescence in a Pentavalent Uranyl Complex

ChemistryEurope, EarlyView.
Redox‐dependent luminescence in a molecular pentavalent uranyl complex supported by a pyridine dipyrrolide pincer ligand is presented. Electrochemical and chemical reduction of the uranyl(VI) species provides a stable uranyl(V) complex that emits blue light from a high‐energy excited state. The anti‐Kasha emission is credited to the presence of “nested”
Leyla R. Valerio, Asmita Sen, William W. Brennessel, Carsten Milsmann, Jochen Autschbach, Ellen M. Matson   +5 more
wiley   +1 more source

Cobalt‐Free Single‐Crystal Cathodes for Next‐Generation Lithium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Cobalt‐free single‐crystal cathodes enhance lithium‐ion battery stability by mitigating fracture, degradation, and phase transitions. This review highlights Ni‐rich layered, Li‐Mn‐rich, spinel, and olivine frameworks, synthesis strategies enabling morphology and defect control, and structural tuning via doping and coatings, offering pathways toward ...
Srinivasan Alagar, Rakesh Saroha, Jun Kim, Hyung Do Kim, Jung Sang Cho, Sang Mun Jeong   +5 more
wiley   +1 more source

Hexavalent chromium removal by ferrochromium slag [PDF]

Journal of Hazardous Materials, 2005
The aim of this study is to demonstrate the potential of Cr(VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr(VI) concentrations of water contacted with ferrochromium slag (W/FS=10) in a closed cycle after 50 batches were found as 0.61 mg/l.
Mehmet, Erdem, H Soner, Altundoğan, M Deniz, Turan, Fikret, Tümen   +3 more
openaire   +2 more sources

Knee arthroplasty failure is associated with significant systemic multimetal exposure

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose This study investigated whether patients scheduled for revision total knee arthroplasty (TKA) are systemically exposed to arthroplasty metals, and whether systemic metal levels in these patients differ depending on the implants' levels of constraint.
Anna Flindt, Katrin Huesker, Georg Volk, Juliane Fuchs, André Hofer, Ulrich Schietsch, Georgi I. Wassilew, Janosch Schoon, Anastasia Rakow   +8 more
wiley   +1 more source

Hybrid Nano-filtration and Micro-filtration Pilot Processes for the Removal of Chromium from Water [PDF]

آب و فاضلاب, 2018
Heavy metal hexavalent chromium is known as a highly toxic compound and based on World Health Organization standards in concentrations greater than 50 micrograms per liter would lead to diseases such as allergic reactions, skin cancer, lung cancer ...
Mehdi Kargar, Ghasem Zolfaghari
doaj   +1 more source

Exploration of the Phytochemical and Antidiabetic Properties of Teucrium polium: A Natural Asset for Type 2 Diabetes Management

ChemistryOpen, EarlyView.
Teucrium polium shows antidiabetic activity with its phytochemical composition and biological activities. The essential oil is rich in carvacrol, thymol, γ‐terpinene, and o‐cymene, while the aqueous and hydroethanolic extracts are characterized by poliumoside, verbascoside, isorhamnetin‐3‐O‐rutinoside, and apigenin‐7‐rutinoside. Antioxidant activity is
Hajar El Ouadni, Aziz Drioiche, Fadoua El Makhoukhi, Omkulthom Al kamaly, Hannou Zerkani, Smail Amalich, Imane Tagnaout, Mohamed Radi, Yahya Cherrah, Touriya Zair, Katim Alaoui   +10 more
wiley   +1 more source

Stabilization mechanism of hexavalent chromium ions in portland cement-based materials

Case Studies in Construction Materials
To improve the resource utilization of chromium-containing solid waste in cement-based materials, the leaching rate, valence state, and microscopic morphology of hexavalent chromium in Portland cement-based materials were studied.
Xuewu Guo, Hongrui Ma, Jianwu Zhou, Wei Cheng, Mingfang Ba   +4 more
doaj   +1 more source