gold recycling Articles

  • Editorial: Going For Gold

    Production of August BioCycle overlaps with the Summer Olympic games in Rio. Watching athletes from around the world put themselves out there in hopes of winning the gold is inspiring, sometimes breathtaking. The rigor of training, the intensity of competition, the dedication and discipline — are there parallels to our world of organics recycling? First there is the obvious. Retail compost ...


    By BioCycle Magazine

  • Reducing Mercury Impacts in Small-Scale Gold Mining

    Despite knowing full well the dangers of mercury, millions of small-scale gold miners across the globe continue to use the metal to separate gold from ore - usually because they have little other choice. The mercury is mixed into ore and combines with the gold in a compound that can easily be scooped out and squeezed into a small bar of amalgam. This is then burned so that the mercury evaporates, ...

  • Assessment of nanofiltration and reverse osmosis potentialities to recover metals, sulfuric acid, and recycled water from acid gold mining effluent

    This work assessed the potential of nanofiltration (NF) and reverse osmosis (RO) to treat acid streams contaminated with metals, such as effluent from the pressure oxidation process (POX) used in refractory gold ore processing. NF and RO were evaluated in terms of rejections of sulfuric acid and metals. Regarding NF, high sulfuric acid permeation (∼100%), was observed, while metals were ...


    By IWA Publishing

  • Garbage to Gold: Breakthrough Technology Uses Plasma to Convert Waste to Useable Products

    A breakthrough technology that uses high-temperature thermal plasma to turn household garbage into a renewable energy source, scrap metal and mineral wool is attracting worldwide attention for Huntsville-based Plasma Waste Recycling. […]  The PWR process doesn"t involve combustion, but a gasification process that is ...


  • Our finest gold: agrarian perspectives on urban technology from the mid-19th century to present-day ecocyclical society

    This study examines how agricultural science, from the mid-19th century to present day, has maintained that urban technology should be designed in response to agricultural interests. Recycling of urban waste was regarded in the mid-19th century as a way of augmenting the fertility of the soil, while at the same time solving the sanitary problems of urban communities. By about 1900 this ...


    By Inderscience Publishers

  • Shredding of end-of-life tyres (ELTs): a ´black gold mine´ ready for being exploited

    “Problems can't be solved by using the same kind of thinking we used when we created them" (Albert Einstein). The 2014 report by the ETRMA (European Tyre and Rubber Manufactures’ Association Sustainable Development Foundation) shows that only considering consumer, light truck, truck, motorcycle and agriculture tyres, in 2012 Germany, UK, France, Italy and Spain had been able ...


    By SatrindTech Srl

  • Is it time to recycle more nickel?

    Now you might think me a little sad, but I have to confess that as a metallurgist, I always find it interesting just how closely the history of mankind is linked to advances in metal working. The first evidence of metal working in Europe dates from around 5500 BC with the extraction of copper, lead and precious metals and this was followed by the working of bronze from around 4000 BC, both of ...

  • The Alamitos Barrier Recycled Water Project

    Groundwater pumping in the Los Alamitos, California area over the last century has caused groundwater levels to drop, allowing seawater to intrude into the local groundwater aquifer. To prevent additional infiltration by seawater, a coastline barrier of wells injecting fresh water has been in place since 1965. Until recently, imported potable drinking water was injected into the aquifer. However, ...

  • The Debate over the Economic Viability of Recycling

    The general view about recycling is that it is extremely beneficial to the environment. The majority of websites pertaining to environmental policies, be it private agency or government, say that a good citizen with moral credibility must do three things: Recycle everything Sort the waste ...

  • E-waste Recycling- Compliance or Necessity

    The era of unorganised recycling of e-waste “formally” ended on 30th April, 2012 in India. With the rise of sun of 1st May, 2012, India joined the club of advanced countries committed for organised recycling of electronic waste. Concerns associated with unorganised recycling: I would like to first of all thank Kabadies (a commonly used terminology ...


    By Eco Recycling Ltd

  • Participation Boost : Maximizing Multifamily Recycling

     Maximizing Multifamily Recycling The city of Seattle, Washington recently introduced major changes to its recycling program, affecting the collection of residential recyclables and yard trimmings. In April, the city added rigid plastic containers of all resins (except #6), along with aseptic juice boxes, polycoated milk cartons and plastic bags. All single and multifamily collection ...


    By BioCycle Magazine

  • Mining Plant Machines Used Mineral Solution And Recycling Plant

    Mining Plant Machines Used Mineral Solution And Recycling Plant Quarry & Mining in SBM Gold Mining Plant in SBM is used for crushing & milling project in Chile construction & quarry & mining processing. The series ...


  • How to Start the Scrap Metal Recycling Business

    Are you looking for ways to start a scrap metal recycling business? Do you want to know what to prepare? With so many people becoming eco-conscious, it is quite profitable to open your own scrap metal business. So next let’s learn about the related know-how. 1. Learn about the market. The scrap business is viable in your geographical location, right? How many are ...

  • Eldan Recycling introduces a system for processing of mining tyres

    The Eldan Recycling mining tyre recycling system can turn the huge waste mining tyres into reusable rubber granulate, powder and clean steel wire… Eldan Recycling delivered and installed its first complete tyre recycling plant back in 1991 and has since then developed and optimised the process to obtain the best possible purity of the rubber granulate. Over 200 complete systems and ...


    By Eldan Recycling A/S

  • Why Rare Earth Recycling is Rare (and What can We Do About it)

    Earbuds, touch screens, CFLs with a warm glow, rechargeable batteries and power windows: Most of us take these things for granted. When we do, we also take for granted a group of elements called rare earth metals, whose special electronic and magnetic properties make them a key component of many 21st century technologies. These 17 elements are actually plentiful enough — you probably have ...


    By Ensia

  • Top 15 things you didn’t know you could recycle

    Figuring out what to recycle and what not to recycle is tough! So we’ve compiled a list of some items and materials that the average character may not have known that they could toss in the recycling bin. We’d be very surprised if you knew that all of these items were recyclable! 1. Pet Fur Believe it or not, all of those mounds of cat and dog hair you’ve ...

  • Pimpama-Coomera dual reticulation end use study: pre-commission baseline, context and post-commission end use prediction

    The Gold Coast Water Pimpama Coomera dual reticulation schemes' recycled water supply will be online in late 2009. In an attempt to achieve better estimates on both potable and likely recycled water end uses within this region, this paper presents a predictive model that utilises a range of input parameters, including: current use in the Gold Coast and the Pimpama Coomera regions at both a bulk ...


    By IWA Publishing

  • Waste Water Treatment For Printed Circuit Manufacturers

    This article only considers normal PWB processing and examines the following metals, Copper, Nickel, Zinc, Lead, Tin, Gold, and the problem anions. cyanide and EDTA complexes. If you've added something new, check it's treatability first. All of these systems can keep you in compliance, even at 0.1 ppm, some will just cost you more to operate or require a 'patch'. These days, everyone wants to ...


  • Treatment of iron(II)-rich acid mine water with limestone and oxygen

    The main components of acid mine water are free acid, sulphate, and Fe2+. Limestone is the most cost-effective alkali that can be used for neutralization. The purpose of this investigation was to identify conditions where Fe2+ is removed with limestone and simultaneously oxidized with oxygen to Fe3+, in a polyvinyl chloride pipe under pressure. Gypsum ...


    By IWA Publishing

  • Raising energy efficiency in a new materials economy - Part II

    There is a vast worldwide potential for cutting carbon dioxide (CO2) emissions by reducing the use of materials. This begins with the major metals--steel, aluminum, and copper--where recycling requires only a fraction of the energy needed to produce these metals from virgin ore, and with the recycling and composting of most household garbage. It continues with designing cars, appliances, and ...


    By Earth Policy Institute

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