Dissolution Mechanism of Modifying Agent in Fibrotic Process of Steel Slag

Carbon dioxide sequestration via carbonation of steel slags is a promising way of combining two waste products to create value. Understanding the dissolution kinetics of steel slags, which are alkaline and rich in calcium, in acidic media is essential to configure such a process. In this study, we seek to analyse the dissolution mechanism from experimental studies and develop a mathematical model considering the heterogeneous characteristics of slag. We found that the reduction in calcium extraction efficiency with an increase in particle size, which is normally associated with surface passivation or non-uniformity of samples, can be explained by considering the morphological features associated with the distribution of MgO–FeO (RO) phase in the calcium silicate matrix. We present a population balance model and show that the reduction in calcium extraction efficiency in coarse particle fractions is due to increased sporulation of the RO phase. The findings in the study suggest that the leaching of metal ions from slag is controlled by proton-promoted surface dissolution reaction, where the dependence of acid concentration follows the Langmuir–Hinshelwood adsorption isotherm. The model shows good agreement with a large set of parametric studies and demonstrates the importance of considering morphological features, as we progress towards development of a priori dissolution models for multi-mineral oxides and silicates.

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Elevated BNP production indicates a fibrotic process in a hypertensive population

European Journal of Heart Failure Supplements ◽

10.1016/s1567-4215(08)60209-x ◽

2008 ◽

Vol 7 ◽

pp. 76-76

Author(s):

D PHELAN ◽

C WATSON ◽

R MARTOS ◽

P COLLIER ◽

M LEDWIDGE ◽

...

Keyword(s):

Hypertensive Population ◽

Fibrotic Process

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A Study on Manufacturing Characteristics for Ash Bricks with Different Weight Mixing Ratio of Waste Incineration Ashes and Steel Slag

Journal of the Korean Society for Environmental Technology ◽

10.26511/jkset.21.5.7 ◽

2020 ◽

Vol 21 (5) ◽

pp. 361-371

Author(s):

Han-Seok Kim ◽

Byung-Gil Jung ◽

Young-Ik Choi ◽

Jin-Hee Jeong ◽

Nak-Chang Sung

Keyword(s):

Steel Slag ◽

Waste Incineration ◽

Mixing Ratio ◽

Incineration Ashes

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Hydration behavior of cementitious materials with all solid waste based of steel slag and blast furnace slag

Revista de la Facultad de Ingeniería ◽

10.21311/002.31.7.17 ◽

2016 ◽

Keyword(s):

Blast Furnace ◽

Solid Waste ◽

Blast Furnace Slag ◽

Steel Slag ◽

Cementitious Materials ◽

Furnace Slag

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Endometrial Regeneration in Asherman's Syndrome: Clinical and Translational evidence of Stem Cell Therapies

Current Stem Cell Research & Therapy ◽

10.2174/1574888x14666190213100528 ◽

2019 ◽

Vol 14 (6) ◽

pp. 454-459

Author(s):

Xuejing Hou ◽

Ying Liu ◽

Isabelle Streuli ◽

Patrick Dällenbach ◽

Jean Dubuisson ◽

...

Keyword(s):

Stem Cell ◽

Molecular Mechanisms ◽

Uterine Cavity ◽

Stem Cell Therapies ◽

Intrauterine Adhesions ◽

Asherman’S Syndrome ◽

Cell Therapies ◽

Fibrotic Process ◽

Physical Barriers

Asherman’s Syndrome or Intrauterine adhesions is an acquired uterine condition where fibrous scarring forms within the uterine cavity, resulting in reduced menstrual flow, pelvic pain and infertility. Until recently, the molecular mechanisms leading to the formation of fibrosis were poorly understood, and the treatment of Asherman’s syndrome has largely focused on hysteroscopic resection of adhesions, hormonal therapy, and physical barriers. Numerous studies have begun exploring the molecular mechanisms behind the fibrotic process underlying Asherman’s Syndrome as well as the role of stem cells in the regeneration of the endometrium as a treatment modality. The present review offers a summary of available stem cell-based regeneration studies, as well as highlighting current gaps in research.

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SHEAR STRENGTH CHARACTERISTICS OF FOAM SHIELD TUNNELING EXCAVATION SURPLUS SOIL MIXED WITH IRON AND STEEL SLAG UNDER SEAWATER ENVIRONMENT AND LABORATORY CASTING EXPERIMENT

Journal of Japan Society of Civil Engineers Ser B3 (Ocean Engineering) ◽

10.2208/jscejoe.75.i_839 ◽

2019 ◽

Vol 75 (2) ◽

pp. I_839-I_844

Author(s):

Yuka KAKIHARA ◽

Yoshiaki KIKUCHI ◽

Shohei NODA ◽

Tomotaka YOSHIKAWA ◽

Katsuya NIIKURA ◽

...

Keyword(s):

Shear Strength ◽

Steel Slag ◽

Strength Characteristics ◽

Shield Tunneling ◽

Iron And Steel ◽

Seawater Environment ◽

Casting Experiment

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PROPERTIES IMPROVEMENT AND HYDROPHOBICITY PREVENTION OF PEAT SOIL IN OIL PALM PLANTATION THROUGH STEEL SLAG APPLICATION

Jurnal Penelitian Kelapa Sawit ◽

10.22302/iopri.jur.jpks.v24i1.5 ◽

2016 ◽

Vol 24 (1) ◽

pp. 39-46

Author(s):

Winarna Winarna ◽

Iput Pradiko ◽

Muhdan Syarovy ◽

Fandi Hidayat

Keyword(s):

Soil Ph ◽

Oil Palm ◽

Water Retention ◽

Peat Soil ◽

Steel Slag ◽

Field Capacity ◽

Ash Content ◽

Oil Palm Plantation ◽

Randomized Design ◽

Four Levels

Development of oil palm plantation on peatland was faced with hydrophobicity problem caused by over drained. Hydrophobicity could reduce water retention and nutrient availability in the peat soil. Beside of proper water management application, addition of soil ameliorant which contain iron could increase stability and improve peat soil fertility. The study was conducted to obtain the effect of steel slag on peat soil properties and hydrophobicity. In this study, peat soil was incorporated with steel slag and incubated in 60 days period. The research was employed completely randomized design (CRD) factorial 2 x 2 x 4. First factor is peat maturity consists of two levels: sapric (S) and hemic (H), while the second factor is soil moisture which also consist of two levels: field capacity (W1) and dry (under the critical water content) (W2). The third factor is steel slag dosage which consist of four levels: 0 g pot (TB0), 7.17 g pot (TB1), 14.81 g -1 -1 pot (TB2), and 22.44 g pot (TB3). The result showed that application of steel slag significantly increase of soil pH, ash content, and water retention at pF 4.2. Furthermore, application of steel slag significantly reduce time for water reabsorption (wettability) in sapric. On the other hand, there are negative corellation between water penetration and soil pH, ash content, and water retention at pF 4.2. Overall, application of steel slag could increase wettability and prevent peat soil hydrophobicity.

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