Synthesis of Hercynite from Aluminium Dross at 1550°C: Implication for Industrial Waste Recycling

2020 ◽  
Vol 977 ◽  
pp. 223-228
Author(s):  
Chirakit Chobtham ◽  
Somyote Kongkarat
Keyword(s):  
Waste Management ◽  
Carbon Content ◽  
Pure Iron ◽  
Industrial Waste ◽  
Solid Phase ◽  
Melting Process ◽  
Waste Recycling ◽  
Hydraulic Press ◽  
Different Types ◽  
Aluminium Dross

Aluminium dross is a waste from aluminium melting process, containing approximately 70 wt% of Al2O3. Disposal of dross in landfill causes soil and ground water pollutions, leading to the difficulty of waste management. This work aims to utilize aluminium dross as a source of Al2O3 for the synthesis of hercynite (FeAl2O4). Aluminium dross was heated at 1200°C for 1 hour in air and then compacted into a substrate using a hydraulic press. The substrate was brought into contact with two different types of iron chip at 1550°C in air for 6 hours. Pure iron chip and iron chips containing 0.8 wt% carbon were employed in this experiment in order to investigate the effect of carbon content in the iron chip on the formation of hercynite. The samples after reactions were characterized using XRD, SEM and EDS techniques. It was found that the final product is hercynite having a dark grey solid phase. The formation of hercynite was due to the interaction of Al2O3 in the dross with Fe and/or FeO in the system. FeO came from the oxidization of iron chip due to the excess of oxygen in the system. Carbon content in the iron was found to effect the formation of FeO in the system, which in turn effect the formation of hercynite. This research is one of the possible way to recycling aluminium dross instead of bury in a landfill.

scholarly journals The Treatment of Industrial Waste by Recycling in Tunisia

2018 ◽  
Vol 1 (1) ◽  
pp. p13
Author(s):  
Lamia Jamel
Keyword(s):  
Waste Management ◽  
Environmental Protection ◽  
Industrial Waste ◽  
Solid Waste Management ◽  
Negative Impact ◽  
Positive Impact ◽  
Urban Expansion ◽  
Waste Recycling ◽  
Analysis Model ◽  
Industrial Waste Management

Waste management in Tunisia is currently one of the priorities of environmental protection and is one of the main pillars of sustainable development. Thus, Tunisia has opted for a comprehensive and progressive policy of environmental protection in order to manage with the current state of the object affected by the strong economic growth and the environment rapid urban expansion in recent years. The area of ​​waste management has received attention currently given the quantity produced changes in the multiplicity of forms and aspects of pollution caused by waste, and limited resources used in the field of solid waste management. During this, our research has been devoted to the study of the phenomenon of industrial waste management by recycling in Tunisia. We employ a model based on a time series analysis model for a period of 17 years from 2000 to 2016. Additionally, we estimate the ability to manage industrial waste recycling based on variables related to the business of recycling industrial waste, variables related to the intervention of Tunisia policy in the management of industrial waste recycling and macroeconomic indicators. From the empirical findings, we conclude that the macro-economic indicators have a negative impact on the dependent variable. The variables related to the intervention of Tunisia policy in industrial waste management through recycling have a positive impact and a negative impact depending on the nature of the waste. And finally, the variable relative to the activity of recycling industrial waste TRDI has a positive impact and DIG variable has a negative impact.

scholarly journals Waste management

BIBECHANA ◽  
1970 ◽  
Vol 7 ◽  
pp. 65-69
Author(s):  
Devesh Pradhan
Keyword(s):  
Waste Management ◽  
Industrial Waste ◽  
Domestic Waste ◽  
Different Types

Waste management has become very challenging in our society. Different types of wastes which are produced in our society have been investigated. Special attention has been given in the management methods of waste. Keywords: Industrial waste; Domestic waste; Composting; Recycling DOI: 10.3126/bibechana.v7i0.4048BIBECHANA 7 (2011) 65-69

scholarly journals Waste-to-Reuse Foam Glasses Produced from Soda-Lime-Silicate Glass, Cathode Ray Tube Glass, and Aluminium Dross

Inorganics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Meriem Sassi ◽  
Andrea Simon
Keyword(s):  
Industrial Waste ◽  
Foam Glass ◽  
Construction Materials ◽  
Melting Process ◽  
Raw Material ◽  
Waste Materials ◽  
Special Focus ◽  
Material Source ◽  
Cathode Ray Tube ◽  
Aluminium Dross

Aluminium dross is a hazardous industrial waste generated during aluminium production. It contains metallic oxides of aluminium and magnesium, other phases (aluminum nitride), and residues of fluxes and salts from the melting process of aluminium. Discarding this by-product is considered an environmental and economic challenge due to the high reactivity of dross with water or even air humidity. After removing the hazardous components from the as-received dross, one of the optional approaches is to incorporate the treated dross into construction materials. Dross is applied in several types of research as a secondary raw material source for alumina, clinker, cement or glass-ceramic production, but only a few papers focus on the usage of dross as a foaming agent for foams. Even fewer research are reported where dross was applied as a basic component of foam glasses. In this work, foam glasses were produced completely from waste materials: Aluminium dross, container (SLS) glass, and cathode ray tube (CRT) glass. The research holds several specificities, i.e., combining two industrial waste materials (CRT glass and dross), and adding an increased amount from the wastes. The physical and mechanical characteristics were examined with a special focus on the effect of the foam glass components on the microstructure, density, thermal conductivity, and compressive strength.

Quantify E-waste and its Disposal Strategy

2020 ◽  
Author(s):  
Nikhil Ranjan Nayak
Keyword(s):  
Developing Countries ◽  
Waste Management ◽  
Positive Impact ◽  
Electronic Waste ◽  
Waste Recycling ◽  
Economic Sector ◽  
Global Business ◽  
Basic Composition ◽  
Different Types ◽  
The Right

Global business scenario of the various green initiatives, waste recycling creates the highest positive impact on the environment. Of all the different types of waste, electronic waste has the characteristics of the fastest growing segment of waste, most valuable due to its basic composition, very hazardous if not handled carefully. However, the sector is very new with only a few corporate players in India and globally. Most of the electronic waste management sector is currently handled by the unorganized/informal sector in India. However due to lack of skills, knowledge, awareness, etc., the sector has remained highly labor intensive, environmentally unfriendly and unhealthy. If done in the right way, and in an organized fashion, e-waste management can become a dominant economic sector. As per various numbers published by various research agencies, about 20 to 50 million tons of e-waste are generated worldwide every year. E-waste comprises more than 5 % of all solid waste generated and the volume is expected to increase at a rate of 300% per annum in developing countries.

ENVIRONMENTAL EFFECT OF ECONOMIC WASTE MANAGEMENT

2020 ◽  
Author(s):  
A.A. Lavrentiev ◽  
◽  
V.V. Sidorkin ◽  
E.A. Gamoyunov ◽  
A.S. Rusaleev ◽  
...  
Keyword(s):  
Environmental Management ◽  
Waste Management ◽  
Environmental Effect ◽  
Agricultural Waste ◽  
Waste Recycling ◽  
Ecological Effect ◽  
Nature Management ◽  
Modern Concept ◽  
Rational Nature ◽  
Modern Technologies

The article explores ways of forming a modern concept of rational nature management of agricultural waste. The analysis of the nomenclature of agricultural waste was carried out, their influence on the environmental situation was studied. The modern technologies of rational nature management of agricultural waste are systematized, the most promising areas of waste recycling are identified. The ecological effect of the application of technologies for the rational environmental management of agricultural waste was studied.

scholarly journals Bioplastic films with unusually good oxygen barrier properties based on potato fruit-juice

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12543-12548
Author(s):  
Simi Poulose ◽  
Ilari Jönkkäri ◽  
Mikael S. Hedenqvist ◽  
Jurkka Kuusipalo
Keyword(s):  
Waste Management ◽  
Industrial Waste ◽  
Fruit Juice ◽  
Potato Starch ◽  
Barrier Properties ◽  
Oxygen Barrier ◽  
Industrial Waste Management ◽  
Starch Industry

Valorization of potato fruit juice, a potato starch industry by-product, by developing biopolymer films that could replace petroleum based alternatives in packaging, providing a greener and sustainable solution to industrial waste management.

Challenges confronting waste pickers in Indonesia: An on-field analysis

2021 ◽  
pp. 0734242X2110291
Author(s):  
Gabriel Andari Kristanto ◽  
Dini Kemala ◽  
Paras AC Nandhita
Keyword(s):  
Waste Management ◽  
Waste Recycling ◽  
Driving Factors ◽  
Field Analysis ◽  
Substantial Contribution ◽  
Recycling Rate ◽  
Small Scale ◽  
Large Cities ◽  
Solid Waste Recycling ◽  
Waste Pickers

This article presents the informal recycling sector’s (IRS) social, economic driving factors in five cities in Indonesia and their contribution to waste management in the cities. An on-field analysis was conducted by random and incidental sampling method of questionnaire administration followed by observation. Among the respondents ( n = 178), 79% of individuals were waste pickers, 15% were small-scale waste collectors, and 6% were medium-scale waste collectors. The majority of the waste pickers sampled are male (79%). The amount of waste collected by individual waste pickers is 43.87 kg person−1 day−1, a corresponding recycling rate of approximately 12%, and an average monthly income of US$91.7. Gender differences are apparent as the male waste pickers generated higher incomes than those earned by their female counterparts (US$128.3 for men and US$69.7 for women) even as their average work hours are similar to that of the men (7.8 and 7.6 hours day−1, respectively). Economic motives are the respondents’ primary driving factors as moving to large cities accompanied by their family members. The study concluded that the IRS plays substantial contribution to waste management; further integrating them into the waste management system via IRS association, additional investment, formulation of law and policies and efforts by municipalities can give various benefits for involved stakeholders, the community and the environment. The results can serve as a significant reference for improving the solid waste recycling system and informal sector management in Indonesian cities and other developing countries.

Unusual liquid-solid transition effects in a methoxypentamethylflavan

1958 ◽  
Vol 243 (1235) ◽  
pp. 518-533 ◽  
Keyword(s):  
Solid Phase ◽  
Polarized Light ◽  
Melting Process ◽  
X Rays ◽  
Melting Range ◽  
Crystalline Materials ◽  
External Conditions ◽  
Transition Effects ◽  
Solid Liquid ◽  
Crystal Boundaries

The solid phase of the compound 2'-methoxy-2 : 4 : 4 : 7 : 4'- pentamethylflavan differs in many respects from normally crystalline materials, yet is not amorphous. It tends to form spherical masses which exhibit no regular crystal boundaries, even when seen under the microscope. The solid melts over a range of up to 3° C and the actual temperatures at which melting begins and ends vary according to the thermal treatment previously received by the specimen. The temperature at which the melt starts to solidify on cooling is always several degrees below the melting range; this is not due to normal supercooling. Solidification from the melt presents several other interesting features, including some rhythmic effects. Variations in the external conditions during solidification can give rise to three superficially different forms of the solid phase. The solid-liquid and liquid-solid transitions have been followed by measurements of density, rigidity and dielectric constant, all of which give further indications of the diffuse nature of the melting process and the existence of hysteresis between melting and solidifica­tion. These effects recall the behaviour of some crystalline high polymers and examination of solid methoxypentamethylflavan by polarized light, X-rays and electron microscopy has revealed further analogies with such materials. It is tentatively concluded that the solid is composed of submicroscopic crystalline regions which are organized into larger spherulitic aggregates, but no definite explanations of the failure of the compound to form macroscopic crystals or of the similarities between it and polymers seem possible at present.

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