Logo

RNfinity

Login Register
  • News/Blog
  • View
  • Info
  • Submit
  • Contact Us
  • Home

Chemistry

Register to submit your paper, and Start Earning from your Research Articles

Physics Maths Engineering

Recycling Quarry Dust as a Supplementary Cementitious Material for Cemented Paste Backfill

Yingying Zhang,

Yingying Zhang

Department of Resource and Mechanical Engineering, Lyuliang University, Lvliang 033001, China

Kaifeng Wang,

Kaifeng Wang

School of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Zhengkun Shi,

Zhengkun Shi

School of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Shiyu Zhang

Shiyu Zhang

School of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China


Quarry dust (QD) landfill causes environmental issues that cannot be ignored. In this study, we systematically explore its potential application as a supplementary cementitious material (SCM) in cemented paste backfill (CPB), revealing the activated mechanism of modified QD (MQD) and exploring the hydration process and workability of CPB containing QD/MQD. The experimental results show tha...
1 week ago

Physics Maths Engineering

Wastewater Treatment Using a Combination of Pumpkin seed Waste After Extraction of Essential Oils (Bio-Coagulant) and Ferric Chloride (Chemical Coagulant): Optimization and Modeling Using a Box–Behnken Design

Abderrezzaq Benalia,

Abderrezzaq Benalia

Département de Physique Chimie, Ecole Normale Supérieure de Constantine, Nouvelle Ville, Constantine 25000, Algeria

Ouiem Baatache,

Ouiem Baatache

Laboratoire de Génie des Procédés pour le Développement Durable et les Produits de Santé (GPDDPS), Département Génie des Procédés, Ecole Nationale Polytechnique de Constantine, Nouvelle Ville, Constantine 25000, Algeria

Katr Enada Zerguine,

Katr Enada Zerguine

École Nationale Biotechnologie de Constantine, Ali Mendjeli Nouvelle Ville, Constantine 25000, Algeria

Amel Khediri,

Amel Khediri

École Nationale Biotechnologie de Constantine, Ali Mendjeli Nouvelle Ville, Constantine 25000, Algeria

Kerroum Derbal,

Kerroum Derbal

Laboratoire de Génie des Procédés pour le Développement Durable et les Produits de Santé (GPDDPS), Département Génie des Procédés, Ecole Nationale Polytechnique de Constantine, Nouvelle Ville, Constantine 25000, Algeria

Nawal Ferroudj,

Nawal Ferroudj

École Nationale Biotechnologie de Constantine, Ali Mendjeli Nouvelle Ville, Constantine 25000, Algeria

Amel Khalfaoui,

Amel Khalfaoui

Faculté de Génie des Procédés, Université de Constantine 3, Nouvelle Ville, Constantine 25000, Algeria

Antonio Pizzi

Antonio Pizzi

Laboratoire d’Etude et Recherche sur le Matériau Bois (LERMAB), Ecole Nationale Supérieure des Technologies et Industries du Bois (ENSTIB), University of Lorraine, 27 rue Philippe Seguin, 88051 Epinal, France


The wastewater treatment involves various techniques at different technological levels. Treatment takes place in several stages, of which coagulation and flocculation are the most important. Most suspended solids are indeed eliminated during this stage by the addition of a coagulant. In this research, bio-coagulant was extracted from pumpkin seed (PS) waste after extraction of the essentia...
1 week ago

Physics Maths Engineering

Impact of Low-Reactivity Calcined Clay on the Performance of Fly Ash-Based Geopolymer Mortar

Kwabena Boakye,

Kwabena Boakye

School of Energy, Construction & Environment, Faculty of Engineering & Computing, Coventry University, Coventry CV1 5FB, UK

Morteza Khorami

Morteza Khorami

School of Energy, Construction & Environment, Faculty of Engineering & Computing, Coventry University, Coventry CV1 5FB, UK


Availability of aluminosiliceous materials is essential for the production and promotion of geopolymer concrete. Unlike fly ash, which can only be found in industrial regions, clays are available almost everywhere but have not received sufficient attention to their potential use as a precursor for geopolymer synthesis. This study investigates the effectiveness of calcined clay as a sole an...
8 months ago

Physics Maths Engineering

Hydration, Reactivity and Durability Performance of Low-Grade Calcined Clay-Silica Fume Hybrid Mortar

Kwabena Boakye,

Kwabena Boakye

School of Energy, Construction & Environment, Faculty of Engineering & Computing, Coventry University, Coventry CV1 5FB, UK

Morteza Khorami

Morteza Khorami

School of Energy, Construction & Environment, Faculty of Engineering & Computing, Coventry University, Coventry CV1 5FB, UK


Low-grade calcined clay, due to its low cost, availability and low temperature calcination, has been gaining attention in recent times as a supplementary cementitious material (SCM) in the manufacture of revolutionary building materials to improve the fresh and hardened properties of concrete. Silica fume, on the other hand, has been used, over the years, to improve the performance of conc...
8 months ago

Physics Maths Engineering

“Noncovalent Interaction”: A Chemical Misnomer That Inhibits Proper Understanding of Hydrogen Bonding, Rotation Barriers, and Other Topics

Frank Weinhold

Frank Weinhold

Theoretical Chemistry Institute and Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA


We discuss the problematic terminology of “noncovalent interactions” as commonly applied to hydrogen bonds, rotation barriers, steric repulsions, and other stereoelectronic phenomena. Although categorization as “noncovalent” seems to justify classical-type pedagogical rationalizations, we show that these phenomena are irreducible corollaries of the same orbital-level conceptions of...
8 months ago

Physics Maths Engineering

A Fixed-Bed Column with an Agro-Waste Biomass Composite for Controlled Separation of Sulfate from Aqueous Media

Mostafa Solgi,

Mostafa Solgi

Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada

Bernd G. K. Steiger,

Bernd G. K. Steiger

Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada

Lee D. Wilson

Lee D. Wilson

Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada


Key Questions

Microbial Pigment Production

How can bacteria produce natural pigments? Bacteria can produce natural pigments by growing on feather meal biomass. Specifically, Chryseobacterium sp. kr6 was used to produce yellow pigmen...
8 months ago

Physics Maths Engineering

Boron Recovery from Organic Solutions Used in Brine Treatment through a Water Stream

Alejandra Cerda,

Alejandra Cerda

Departamento de Ingeniería Química y Procesos de Minerales, Facultad de Ingeniería, Universidad de Antofagasta, Av. Angamos 601, Antofagasta 1240000, Chile

Mackarena Jara,

Mackarena Jara

SQM, El Trovador 4285, Santiago 7550000, Chile

Osvaldo Yañez,

Osvaldo Yañez

SQM, El Trovador 4285, Santiago 7550000, Chile

Yahaira Barrueto,

Yahaira Barrueto

Departamento de Ingeniería Metalúrgica y Materiales, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile

Yecid P. Jimenez

Yecid P. Jimenez

Departamento de Ingeniería Química y Procesos de Minerales, Facultad de Ingeniería, Universidad de Antofagasta, Av. Angamos 601, Antofagasta 1240000, Chile


Abstract

This research evaluates the modification of the lithium carbonate (Li2CO3) production process and particularly the boron removal step, which currently employs a recirculated stream. This recirculated stream is a liquor with low boron content but rich in lithium, currently being wasted. In this process, the recirculating stream ...
8 months ago

Physics Maths Engineering

Thermodynamics of Iron Ammonia Synthesis Catalyst Sintering

Walerian Arabczyk,

Walerian Arabczyk

Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland

Rafał Pelka,

Rafał Pelka

Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland

Izabella Jasińska,

Izabella Jasińska

Grupa Azoty Zakłady Chemiczne “Police” S.A., 1 Kuźnicka Str., 72-010 Police, Poland

Zofia Lendzion-Bieluń

Zofia Lendzion-Bieluń

Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland


Key Takeaways

  • Thermodynamic Stability

    - The study presents a model demonstrating the thermodynamic parameters that govern the iron catalyst sintering process, focusing on stability aspects of nanocrystalline structures.

  • Catalyst Activation Mechanisms

    ...
    9 months ago

Physics Maths Engineering

Synthesis of Bisoxazole and Bromo-substituted Aryloxazoles

Sambasivarao Kotha,

Sambasivarao Kotha

Department of Chemistry, Indian Institute of Technology, Bombay 400076, India

Subba Rao Cheekatla

Subba Rao Cheekatla

Department of Chemistry, Indian Institute of Technology, Bombay 400076, India


Herein, we report a bisoxazole derivative as well as a bromo-substituted oxazole derivatives via a simple approach. The synthesis begins with an inexpensive and readily available starting material, such as 2,5-dimethoxybenzaldehyde, hydroquinone, and p-toluenesulfonylmethyl isocyanide (TosMIC). This approach relies on the Van Leusen oxazole method and electrophilic aromatic bromination. The struct...
10 months ago

Physics Maths Engineering

Applications of Machine Learning to the Study of Crystalline Materials

Hartmut Schlenz,

Hartmut Schlenz

Forschungszentrum Juelich, Institute of Energy and Climate Research (IEK), IEK-1: Materials Synthesis and Processing, Wilhelm-Johnen-Strasse, D-52425 Juelich, Germany

Stefan Sandfeld

Stefan Sandfeld

Forschungszentrum Juelich, Institute of Advanced Simulation—Materials Data Science and Informatics (IAS-9), Wilhelm-Johnen-Strasse, D-52425 Juelich, Germany


This Special Issue, “Applications of Machine Learning to the Study of Crystalline Materials”, is a collection of seven original articles published in 2021 and 2022 and dedicated to applications of machine learning in materials research. Machine learning (ML) is rapidly revolutionizing many fields and is starting to change landscapes for physics, chemistry, materials science, and structural re...
10 months ago

Related Subjects

Physics Math Computer science Engineering Earth science Biology

Showing Page 1 to 2

  • ‹
  • 1
  • 2
  • ›

Follow Us

  • Xicon
  • Contact Us
  • Privacy Policy
  • Terms and Conditions

5 Braemore Court, London EN4 0AE | Telephone +442082758777 | info@rnfinity.com |


© Copyright 2025 All Rights Reserved.