scholarly journals Blast furnace slag and pine bark as potential filter media for metal sorption from landfill leachate

2019 ◽  
pp. 325-333
Author(s):  
Lena Johansson Westholm
Keyword(s):  
Heavy Metals ◽  
Blast Furnace ◽  
Landfill Leachate ◽  
Blast Furnace Slag ◽  
Laboratory Experiments ◽  
Pine Bark ◽  
Treatment Methods ◽  
Filter Materials ◽  
Landfill Sites ◽  
Furnace Slag

Heavy metals are commonly occurring in landfill leachate and in order to achieve theenvironmental goal about a non-toxic environment adopted by the Swedish Parliament, theleachate must be treated before being discharged into a nearby surface or groundwater body.There are several technical treatment options based on chemical, biological or physicalprocesses. Examples of these techniques are the SBR technique, oxidation and membranefiltration. These treatment methods are not always suitable at all landfill sites due toeconomical and/or technical constraints. Other treatment methods have therefore attractedattention. These methods, often natural based such as constructed wetland systems, are moreadapted to small landfill sites where high-tech and cost-demanding alternatives are not anoption. One natural based method that has attracted attention for leachate treatment in recentyears is the filter technique. It is based on the passage of a polluted water flow through a filtermedia with properties suitable for retention of heavy metals or other pollutants. A largenumber of different filter materials have been investigated with regard to their metal sorptioncapacity. The majority of these studies have been carried out in laboratory experiments ofdifferent kinds. Industrial by-products such as blast furnace slag and pine bark are filtermaterials that have been considered interesting for metal removal from landfill leachate. Aseries of laboratory experiments carried out as batch tests have therefore been conducted inorder to learn more about the potential of these filter materials to remove heavy metals fromlandfill leachate.

scholarly journals Metal reduction from landfill leachate by using blast furnace slag and pine bark - discussion about the parameters significant for metal removal

2019 ◽  
pp. 277-286
Author(s):  
Emma Nehrenheim
Keyword(s):  
Blast Furnace ◽  
Landfill Leachate ◽  
Blast Furnace Slag ◽  
Metal Removal ◽  
Low Cost ◽  
Paper Industry ◽  
Filter Material ◽  
Pine Bark ◽  
Cost Treatment ◽  
Furnace Slag

In Sweden there are many old landfills of which the content is more or less unknown, Theleachates from these are of varying quality, mirroring the waste deposited in the landfills,Metals commonly occurring in leachates are i,e, zink (Zn), lead (Pb), cupper (Cu) and nickel(Ni), Ni is of particular interest due to the un-predictable mobility of the metal, For small,weak leachates a passive low-cost treatment system can be suitable, Reactive filter technologyis one alternative and by using by-products from national and global industries theenvironmental benefit could be further increased, Pine bark (from pulp and paper industry)and blast furnace slag (from steel manufacturing) are examples of such materials, Designingfilters for removal of metals from leachate includes taking a series of parameters into accountAt the landfill site in Eskilstuna, Sweden, a facility was designed as a pilot study, Fourcolumns were filled with filter material, The materials were sand, amorphous and crystallineblast furnace slag and pine bark, The aim was to investigate parameters significant for metaluptake from landfill leachate, A screening of the metals, physio-chemical parameters andsome organic pollutants was conducted for a period of five months, A part from this, a batchexperiment was conducted, Contact time, initial concentration, other leachate components andpH are examples of parameters that have a significant influence on the metal removingcapacity of a filter,

Review of the Heavy Metals in Blast-furnace Slag Cement

2018 ◽  
Vol 35 (4) ◽  
pp. 336-340
Author(s):  
Yong-Jun Kim ◽  
Nam-Il Uhm ◽  
Young-Yeul Kang ◽  
Jung-Keun Oh ◽  
Sun-Kyoung Shin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Slag Cement ◽  
Furnace Slag

scholarly journals Adsorptive removal of five heavy metals from water using blast furnace slag and fly ash

2017 ◽  
Vol 25 (21) ◽  
pp. 20430-20438 ◽  
Author(s):  
Thuy Chung Nguyen ◽  
Paripurnanda Loganathan ◽  
Tien Vinh Nguyen ◽  
Jaya Kandasamy ◽  
Ravi Naidu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Adsorptive Removal ◽  
Furnace Slag

The Leachability of Heavy Metals from Alkali-Activated Fly Ash and Blast Furnace Slag Matrices

2016 ◽  
Vol 851 ◽  
pp. 141-146
Author(s):  
Jan Koplík ◽  
Miroslava Smolková ◽  
Jakub Tkacz
Keyword(s):  
Mechanical Properties ◽  
Heavy Metals ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Inductively Coupled Plasma ◽  
Emission Spectrometry ◽  
Alkali Activation ◽  
Furnace Slag ◽  
Alkali Activated

The ability of alkali-activated materials (AAMs) to fix and immobilize heavy metals was investigated. Two raw materials were used to prepare alkali-activated matrices – high-temperature fly ash and blast furnace slag (BFS). NaOH served as an alkaline activator. Two heavy metals (Mn, Ni) were added in different amounts to find out the influence of dosage of heavy metal on the mechanical properties of the matrices and the leachability. Leachability was measured as concentration of heavy metals in leachates (ČSN EN 12457-4) by inductively coupled plasma/optical emission spectrometry (ICP/OES). Structure of prepared matrices was characterized by scanning electron microscopy (SEM). Increasing of addition of heavy metals led to decrease of mechanical properties of matrices. The leaching tests showed, that both matrices can immobilize Mn and Ni in dosages of 0.1 – 2,5%. Higher dosages caused deterioration of the matrices and increased the leachability. After alkali activation both heavy metals were transformed into the form of insoluble salts.

Elution Behavior of Heavy Metals From Cement Solidified Products of Incinerated Ash Waste

2011 ◽  
Author(s):  
Yoshihiro Meguro ◽  
Yoshimi Kawato ◽  
Takuya Nakayama ◽  
Osamu Tomioka ◽  
Motoyuki Mitsuda
Keyword(s):  
Heavy Metals ◽  
Blast Furnace ◽  
Portland Cement ◽  
Blast Furnace Slag ◽  
Ordinary Portland Cement ◽  
Slag Cement ◽  
Cement Material ◽  
Elution Behavior ◽  
Furnace Slag

A method, in which incinerated ash is solidified with a cement material, has been developed to dispose radioactive incinerated ash waste. In order to bury the solidified product, it is required that elution of hazardous heavy metals included in the ash from the solidified products is inhibited. In this study, the elution behavior of the heavy metals from the synthetic solidified products, which included Pb(II), Cd(II), and Cr(VI) and were prepared using ordinary portland cement (OPC), blast furnace slag cement (BFS), or a cement material that showed low alkalinity (LA-Cement), was investigated. Several chemicals and materials were added as additive agents to prevent the elution of the heavy metals. When OPC was used, Cd elution was inhibited, but Pb and Cr were not enough even using the additive agent examined. FeSO4 and Na2S additive agents worked effective to inhibit elution of Cr. When BFS was used, the elution of Pb, Cd and Cr was inhibited for the all products prepared. In the case of LA-Cement, the elution of Pb and Cd was inhibited for the all products, but only the product that was added FeSO4 showed good result of the elution of Cr.

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