نتایج جستجو برای: waste polymers

تعداد نتایج: 151822  

ژورنال: مواد پرانرژی 2019

In this research a new type of magnetic Pb(II) and Cr(VI) ion-imprinted polymers were synthesized using Fe3O4@SiO2 magnetic particles as supporter, benzoyl phenyl hydroxylamine and dithizone as ligands for Pb and Cr ions respectively, 4-vinyl pyridine as functional monomer, ethylene glycol dimethacrylate as crosslinker and 2,2′-azobis(isobutyronitrile) as the initiator. The ionic templates were...

2016
Auxiliadora Prieto

Global warming, market and production capacity are being the key drivers for selecting the main players for the next decades in the market of bio-based plastics. The drop-in bio-based polymers such as the bio-based polyethylene terephtalate (PET) or polyethylene (PE), chemically identical to their petrochemical counterparts but having a component of biological origin, are in the top of the list...

2017
M. Murphy

Increasing traffic loading and volumes on roads has led to the use of polymer modified binders to improve the performance of bitumen in terms of additional strength, durability and increased resistance to rutting and fatigue cracking. Generally those modifiers currently in use are virgin polymers but the research investigate the possibility of using waste polymers instead. The aim was to find a...

Journal: :Biotechnology and bioengineering 2003
Vasily A Vavilin Sergey V Rytov Ljudmila Ya Lokshina Spyros G Pavlostathis Morton A Barlaz

A distributed model of solid waste digestion in a 1-D bioreactor with leachate recirculation and pH adjustment was developed to analyze the balance between the rates of polymer hydrolysis/acidogenesis and methanogenesis during the anaerobic digestion of municipal solid waste (MSW). The model was calibrated on previously published experimental data generated in 2-L reactors filled with shredded ...

Journal: :Science 2017
Ann-Christine Albertsson Minna Hakkarainen

sciencemag.org SCIENCE to access higher-purity polymer feedstocks will be required to minimize the dependence on consumer separation of materials manually during disposal for collection. Strategies for recycling mixed or contaminated feedstocks are also needed. Current compatibilizers must be customized for a given waste composition, which is not going to be practical on the large scale. More v...

2017
Roland Geyer Jenna R. Jambeck Kara Lavender Law

Plastics have outgrown most man-made materials and have long been under environmental scrutiny. However, robust global information, particularly about their end-of-life fate, is lacking. By identifying and synthesizing dispersed data on production, use, and end-of-life management of polymer resins, synthetic fibers, and additives, we present the first global analysis of all mass-produced plasti...

2017
Vinay Mohan Pathak Navneet Kumar

Present investigation evaluates the LDPE (low-density polyethylene) biodegradation efficiency of polymer degrading bacteria along with UV, nitric acid and surfactant treatments. In current scenario LDPE contamination reported as dominant pollutant in terrestrial and aquatic ecosystem due to its expulsion from commercial and domestic practices. Biodegradation serve as an innovative and effective...

Journal: :Environmental Health Perspectives 1997
H N Gray D E Bergbreiter

New methods for the reduction and remediation of hazardous wastes like carcinogenic organic solvents, toxic materials, and nuclear contamination are vital to environmental health. Procedures for effective waste reduction, detection, and removal are important components of any such methods. Toward this end, polymeric smart materials are finding useful applications. Polymer-bound smart catalysts ...

2012
Atul Prakash Johari Devendra Jain Rakesh Kumar Singh

ABSTRACT: – The increasing awareness of environment, government has promoted great interest in selected waste collection and has attracted the interest of research groups to challenge of converting recycled plastic into useful products. Converting PET containing film laminate waste is studied to obtain a new material with enhanced properties. In present study different percentage of film lamina...

2017
Max J H Worthington Renata L Kucera Inês S Albuquerque Christopher T Gibson Alexander Sibley Ashley D Slattery Jonathan A Campbell Salah F K Alboaiji Katherine A Muller Jason Young Nick Adamson Jason R Gascooke Deshetti Jampaiah Ylias M Sabri Suresh K Bhargava Samuel J Ippolito David A Lewis Jamie S Quinton Amanda V Ellis Alexander Johs Gonçalo J L Bernardes Justin M Chalker

Mercury pollution threatens the environment and human health across the globe. This neurotoxic substance is encountered in artisanal gold mining, coal combustion, oil and gas refining, waste incineration, chloralkali plant operation, metallurgy, and areas of agriculture in which mercury-rich fungicides are used. Thousands of tonnes of mercury are emitted annually through these activities. With ...

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