Highly Efficient Removal of Lead Ions from Aqueous Solutions Using Chitosan/Rice Husk Ash/Nano Alumina with a Focus on Optimization by Response Surface Methodology: Isotherm, Kinetic, and Thermodynamic Studies

2019 ◽  
Vol 27 (5) ◽  
pp. 1025-1042 ◽  
Author(s):  
Shiva Fooladgar ◽  
Abbas Teimouri ◽  
Shima Ghanavati Nasab
Keyword(s):  
Response Surface Methodology ◽  
Aqueous Solutions ◽  
Response Surface ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Lead Ions ◽  
Efficient Removal ◽  
Thermodynamic Studies ◽  
Nano Alumina ◽  
Kinetic And Thermodynamic Studies

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

2019 ◽  
Vol 158 ◽  
pp. 233-244 ◽  
Author(s):  
Ahmad Jonidi Jafari ◽  
Ahamd Alahabadi ◽  
Mohmmad Hossien Saghi ◽  
Zahra Rezai ◽  
Ayoob Rastegar ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Thermodynamic Studies ◽  
Adsorptive Removal ◽  
Kinetic And Thermodynamic Studies

scholarly journals Selective removal of lead ions from aqueous solutions using 1,8-dihydroxyanthraquinone (DHAQ) functionalized graphene oxide; isotherm, kinetic and thermodynamic studies

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 5685-5694 ◽  
Author(s):  
Mohammad Khazaei ◽  
Simin Nasseri ◽  
Mohammad Reza Ganjali ◽  
Mehdi Khoobi ◽  
Ramin Nabizadeh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Selective Removal ◽  
Lead Ions ◽  
Polluted Water ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies ◽  
Efficient Adsorbent

The Fe3O4@DHAQ_GO nanocomposite can serve as an efficient adsorbent for the selective removal of lead from polluted water.

scholarly journals Optimization of Adhesion Strength and Microstructure Properties by Using Response Surface Methodology in Enhancing the Rice Husk Ash-Based Geopolymer Composite Coating

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2709
Author(s):  
Mohd Salahuddin Mohd Basri ◽  
Faizal Mustapha ◽  
Norkhairunnisa Mazlan ◽  
Mohd Ridzwan Ishak
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Composite Coating ◽  
Adhesion Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Offshore Structures ◽  
Interfacial Bonding ◽  
Curing Temperature ◽  
High Adhesion

As a result of their significant importance and applications in vast areas, including oil and gas, building construction, offshore structures, ships, and bridges, coating materials are regularly exposed to harsh environments which leads to coating delamination. Therefore, optimum interfacial bonding between coating and substrate, and the reason behind excellent adhesion strength is of utmost importance. However, the majority of studies on polymer coatings have used a one-factor-at-a-time (OFAT) approach. The main objective of this study was to implement statistical analysis in optimizing the factors to provide the optimum adhesion strength and to study the microstructure of a rice husk ash (RHA)-based geopolymer composite coating (GCC). Response surface methodology was used to design experiments and perform analyses. RHA/alkali activated (AA) ratio and curing temperature were chosen as factors. Adhesion tests were carried out using an Elcometer and a scanning electron microscope was used to observe the microstructure. Results showed that an optimum adhesion strength of 4.7 MPa could be achieved with the combination of RHA/AA ratio of 0.25 and curing temperature at 75 °C. The microstructure analysis revealed that coating with high adhesion strength had good interfacial bonding with the substrate. This coating had good wetting ability in which the coating penetrated the valleys of the profiles, thus wetting the entire substrate surface. A large portion of dense gel matrix also contributed to the high adhesion strength. Conversely, a large quantity of unreacted or partially reacted particles may result in low adhesion strength.

Tetracycline adsorption onto rice husk ash, an agricultural waste: Its kinetic and thermodynamic studies

2016 ◽  
Vol 222 ◽  
pp. 487-494 ◽  
Author(s):  
Yajun Chen ◽  
Fenghe Wang ◽  
Lunchao Duan ◽  
Hao Yang ◽  
Jay Gao
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies
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