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,

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.

Preparation of a New Unburned Brick from Ti-Bearing Blast Furnace Slag and PVA Modified by Epikote

2013 ◽  
Vol 785-786 ◽  
pp. 328-331 ◽  
Author(s):  
Xiang Wen Kong ◽  
Li Li Ren ◽  
Xia Ai ◽  
Jing Zhang
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Mixing Time ◽  
Cementitious Materials ◽  
Test Method ◽  
Process Conditions ◽  
Curing Time ◽  
Orthogonal Test Method ◽  
Furnace Slag

A new unburned brick was prepared from the Ti-bearing blast furnace slag as an aggregate and PVA modified by epikote as cementitious materials. The effects of modified PVA and auxiliaries on compressive strength of unburned brick were studied by the orthogonal test method. The results show that samples have better properties and low cost when the samples have a composition of slag dosage 72 %, modified PVA dosage 6%, auxiliary 1 dosage 6%, auxiliary 2 dosage 10%, water 6% and the process conditions of preparing the brick sample were mixing time 1 h, forming time 10 min, forming pressure 40 MPa, and curing time 7 d. The study reveals that the samples properties can meet the standard requirements of excellent grade products (MU20) in GB11945-1999.

Preparation of low cost glass–ceramics from molten blast furnace slag

2012 ◽  
Vol 38 (3) ◽  
pp. 2495-2500 ◽  
Author(s):  
Yan Zhao ◽  
Dengfu Chen ◽  
Yanyan Bi ◽  
Mujun Long
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Glass Ceramics ◽  
Furnace Slag

scholarly journals Application of a blast furnace slag carrier catalyst in flue gas denitration and sulfur resistance

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 15036-15043
Author(s):  
Zhang Lei ◽  
Lu Xi ◽  
Qi Lingbo ◽  
Shu Hao ◽  
Jia Yang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Flue Gas ◽  
Blast Furnace Slag ◽  
High Efficiency ◽  
Low Cost ◽  
Sulfur Resistance ◽  
Furnace Slag

It is an urgent need to develop a new catalyst with high efficiency and low cost.

Low-cost V−W−Ti SCR catalyst from titanium-bearing blast furnace slag

2014 ◽  
Vol 2 (2) ◽  
pp. 1007-1010 ◽  
Author(s):  
Juan Yang ◽  
Shan Lei ◽  
Jian Yu ◽  
Guangwen Xu
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Scr Catalyst ◽  
Furnace Slag

Removal of Arsenic(III) from Groundwater using Low-Cost Industrial By-products-Blast Furnace Slag

2006 ◽  
Vol 41 (2) ◽  
pp. 130-139 ◽  
Author(s):  
Sushil Raj Kanel ◽  
Heechul Choi ◽  
Ju-Yong Kim ◽  
Saravanamuthu Vigneswaran ◽  
Wang Geun Shim
Keyword(s):  
Diffusion Coefficient ◽  
Blast Furnace ◽  
Surface Diffusion ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Permeable Reactive Barrier ◽  
Batch Adsorption ◽  
Homogeneous Surface ◽  
Film Diffusion ◽  
Furnace Slag

Abstract Blast furnace slag (BFS), a steel industrial by-product, was tested for the removal of As(III), which is a highly toxic, mobile and predominant species in anoxic groundwater. Batch adsorption experiments were performed to determine the feasibility of BFS as an adsorbent for removing As(III) from groundwater as As(III) concentration and the pH of water were varied. The maximum As(III) adsorption capacity by BFS was 1.40 mg As(III)/g of BFS at 1 mg/L As(III) initial concentration, at 25°C, which was calculated using the Langmuir isotherm. The homogeneous surface diffusion model (HSDM) was successfully applied to predict the sorptive removal of As(III) onto the BFS. Kinetic studies indicated that the film diffusion as well as surface diffusion of As in the BFS was involved. It was found that the film diffusion coefficient (kf) was 5.27 × 10-5 to 4.06 × 10-6 m/s and surface diffusion coefficient (Ds) was 2.31 × 10-14 to 7.13 × 10-14 m2/s for the initial As(III) concentrations of 0.1 to 100 mg/L. Oxidation of As(III) to As(V) and its adsorption/precipitation onto BFS is involved during the As(III) removal mechanism. It was also found that H4SiO40, PO43-, NO3-, SO42- and HCO3- are potential interferences in the As(III) adsorption reaction. Results suggest that 99.9% As(III) at 1 mg/L can be removed by 10 g/L BFS, which can be used as a permeable reactive barrier (PRB) material to remove As(III) from groundwater. Details of As(III) adsorption and coprecipitation systems and interferences of As(III) molecular interactions were also studied.

scholarly journals Engineering Parameters of Rice Straw Concrete with Granulated Blast Furnace Slag

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 343
Author(s):  
Taha Ashour ◽  
Mohamad Morsy ◽  
Azra Korjenic ◽  
Henriette Fischer ◽  
Mervat Khalil ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Rice Straw ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Construction Material ◽  
Surrounding Matrix ◽  
Granulated Blast Furnace Slag ◽  
Physical Testing ◽  
Engineering Parameters ◽  
Furnace Slag

The construction industry is responsible for a large amount of both embodied carbon and emissions. Especially with concrete, there is still a lot of potential for designing recipes in a more ecological way. Approaches to reduce the environmental impact of concrete include the use of industrial and agricultural by-products. This study combines the approaches of replacing cement with granulated blast furnace slag and the use of NaOH-treated rice straw fibers. The research objective comprises the design of an ecologically optimized concrete as well as the question of whether a pretreatment of rice straw fibers with NaOH improves the performance of the designed concrete. The method includes mechanical and physical testing of the of the designed concrete as well as an optical analysis with a scanning electron microscope. The results indicated that treating rice straw with 1% NaOH indicates a better bond between fibers and the surrounding matrix. The tests in which the rice straw was treated with NaOH achieved a higher density, splitting strength, tensile strength and compressive strength. The study contributes an ecologically optimized concrete with granulated blast furnace slag and NaOH-treated rice straw concrete, which shows a great potential as an environmentally friendly, low-cost construction material.

scholarly journals Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zhonghui Zhang ◽  
Yuanhui Li ◽  
Lei Ren ◽  
Zhenbang Guo ◽  
Haiqiang Jiang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Solid Content ◽  
Binder Content ◽  
Rheological Parameters ◽  
Chemical Admixture ◽  
Shear Yield ◽  
Paste Backfill ◽  
Furnace Slag

The use of blast furnace slag-based binders in cemented paste backfill (CPB) has become increasingly popular in China, due to its low cost and superior early-age strength. Increasing the solid content can increase the strength of CPB, but it will lead to a decrease in its fluidity. As a chemical admixture that can improve CPB slurry fluidity, superplasticizer is gaining increased interest in the field of CPB. In this study, the effects of superplasticizer types and dosages, curing time, solid content, and binder content on the rheological properties of fresh CPB made of blast furnace slag-based binder (Slag-CPB) were studied. For Slag-CPB samples, polycarboxylate (PC) has the best water-reducing effect, followed by polymelamine sulfonate (PMS) and polynaphthalene sulfonate (PNS). In the absence of a superplasticizer, the shear yield stress and plastic viscosity of Slag-CPB are lower than those of CPB made of ordinary Portland cement (OPC-CPB). The water-reducing effect of PC on OPC-CPBs samples is stronger than that of Slag-CPB samples. The degradation rate of the water-reducing effect in slag-based samples is higher than that in cement-based samples. The effect of PC is affected by solid content and binder content. These results will contribute to a better understanding of the rheological behavior of Slag-CPB with superplasticizer.

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