Interaction of blast-furnace slag with heavy metal ions in water solutions

Blast furnace slag has good adsorption performance and can be used to adsorb heavy metal ions in waste liquid. It’s worth studying whether the blast furnace slag absorbing heavy metal ions will pose a potential threat to the environment during the process when used in cement-based materials.This paper has studied the leaching amount of copper ions in the blast furnace slag-cement system was analyzed, and analyzed the leaching kinetics of copper ions. The results showed that the leaching amount of copper ions in the blast furnace slag-cement system that adsorbed copper ions basically met the national standard, and the solidified body age was 28 days,blast furnace slag content 30% is the smallest condition for the amount of copper ion leaching.The leaching model of copper ions in the blast furnace slag-cement system is the Elovich equation, which is a heterogeneous diffusion process. The longer the curing age is the slower the leaching process is completed and do not cause environmental pollution during long-term use.

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Complex-forming Adsorbents Based on Kaolinite, Aluminium Oxide and Polyphosphates for the Extraction and Concentration of Heavy Metal Ions from Water Solutions

Journal of Ion Exchange ◽

10.5182/jaie.14.supplement_113 ◽

2003 ◽

Vol 14 (Supplement) ◽

pp. 113-116

Author(s):

Yuri I. TARASEVICH ◽

Galyna M. KLIMOVA

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Aluminium Oxide ◽

Water Solutions

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Comparison of surface functional groups and metal uptake efficiency of rice husk harvested from different climatic zones

Water Science & Technology ◽

10.2166/wst.2012.066 ◽

2012 ◽

Vol 65 (10) ◽

pp. 1738-1744 ◽

Cited By ~ 1

Author(s):

Amir Hossein Matin ◽

Shokooh Sadat Khaloo ◽

Abbas Akbarzadeh ◽

Mohammad Riahi

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Functional Groups ◽

Rice Husk ◽

Heavy Metal Ions ◽

Metal Cations ◽

Climatic Conditions ◽

Water Solutions ◽

Heavy Metal Cations ◽

Climatic Regions

Rice husk (RH) is a very effective natural adsorbent for fast removal of heavy metal cations from water solutions. Application of RH for removal of some heavy metal ions, such as Ni, Zn, Mn, Co, Cu, Pb and Cd from water solutions has been studied and different maximum adsorption capacities and a variety of optimized conditions were reported in the literature. In this work, the efficiency of RH harvested from different climatic regions was studied. For this proposal, different RH samples were collected from three different climatic regions of Iran (nominated as RH1 to RH3); their removal efficiencies of heavy metal cations of Ni2+, Cu2+ and Cd2+ were investigated and compared. The adsorption data at optimum conditions could be assessed well by both Langmuir and Freundlich models. Statistical analysis of the results of adsorption isotherms showed that different RH samples have different efficiencies in uptake of these heavy metal ions. The RH samples were characterized using Fourier transform infrared spectroscopy and Boehm titration, which indicated that amounts of functional groups differed between RHs that are grown in different climatic conditions.

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