Adsorption efficiency, thermodynamics, and kinetics of amino-functionalized mesoporous calcium silicate for the removal of heavy metal ions

2018 ◽  
Vol 107 ◽  
pp. 165-181 ◽  
Author(s):  
Lihua Liu ◽  
Jinyan Liu ◽  
Tong Li ◽  
Ganggang Yang ◽  
Anping Tang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Calcium Silicate ◽  
Heavy Metal Ions ◽  
Adsorption Efficiency ◽  
Thermodynamics And Kinetics ◽  
Kinetics Of

scholarly journals A systematic study for removal of heavy metals from aqueous media using Sorghum bicolor: an efficient biosorbent

2018 ◽  
Vol 77 (10) ◽  
pp. 2355-2368 ◽  
Author(s):  
Khalida Naseem ◽  
Zahoor H. Farooqi ◽  
Muhammad Z. Ur Rehman ◽  
Muhammad A. Ur Rehman ◽  
Robina Begum ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Aqueous Media ◽  
Review Article ◽  
Isotherm Models ◽  
Adsorption Efficiency ◽  
Adsorption Isotherm Models ◽  
Removal Of Heavy Metals

Abstract This review is based on the adsorption characteristics of sorghum (Sorghum bicolor) for removal of heavy metals from aqueous media. Different parameters like pH, temperature of the medium, sorghum concentration, sorghum particle size, contact time, stirring speed and heavy metal concentration control the adsorption efficiency of sorghum biomass for heavy metal ions. Sorghum biomass showed maximum efficiency for removal of heavy metal ions in the pH range of 5 to 6. It is an agricultural waste and is regarded as the cheapest biosorbent, having high adsorption capacity for heavy metals as compared to other reported adsorbents, for the treatment of heavy metal polluted wastewater. Adsorption of heavy metal ions onto sorghum biomass follows pseudo second order kinetics. Best fitted adsorption isotherm models for removal of heavy metal ions on sorghum biomass are Langmuir and Freundlich adsorption isotherm models. Thermodynamic aspects of heavy metal ions adsorption onto sorghum biomass have also been elaborated in this review article. How adsorption efficiency of sorghum biomass can be improved by different physical and chemical treatments in future has also been elaborated. This review article will be highly useful for researchers working in the field of water treatment via biosorption processing. The quantitative demonstrated efficiency of sorghum biomass for various heavy metal ions has also been highlighted in different sections of this review article.

Surface charge of mesoporous calcium silicate and its adsorption characteristics for heavy metal ions

2020 ◽  
Vol 99 ◽  
pp. 106072 ◽  
Author(s):  
Lihua Liu ◽  
Siyan Liu ◽  
Hongliang Peng ◽  
Zhengchi Yang ◽  
Lu Zhao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Surface Charge ◽  
Calcium Silicate ◽  
Heavy Metal Ions ◽  
Adsorption Characteristics

scholarly journals Research on the Adsorption Behavior of Heavy Metal Ions by Porous Material Prepared with Silicate Tailings

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 291 ◽  
Author(s):  
Dongxiao Ouyang ◽  
Yuting Zhuo ◽  
Liang Hu ◽  
Qiang Zeng ◽  
Yuehua Hu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Porous Material ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Low Cost ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
New Thought ◽  
Adsorption Models ◽  
Kinetics Of

Tailings generated from mineral processing have attracted worldwide concerns due to creating serious environmental pollution. In this work, porous adsorbents were prepared as a porous block by using silicate tailings, which can adsorb heavy metal ions from the solution and are easy to separate. The synthesized silicate porous material (SPM) was characterized by X-ray diffraction (XRD), Brunner–Emmet–Teller (BET), and scanning electron microscope (SEM). The material presented a surface area of 3.40 m2⸱g−1, a porosity of 54%, and the compressive strength of 0.6 MPa. The maximum adsorption capacities of Pb2+, Cd2+, and Cu2+ by SPM were 44.83 mg·g−1, 35.36 mg·g−1, and 32.26 mg·g−1, respectively. The experimental data were fitted well by the Freundlich and Langmuir adsorption models. The kinetics of the adsorption process were fitted well by the pseudo-first order kinetic equation. These results show that the porous materials prepared with silicate tailings could act as an effective and low-cost adsorbent for the removal of heavy metal ions from wastewater. This study may provide a new thought on the high-value utilization of tailing for alleviating environmental pressure.

Functionalized calcium silicate nanofibers with hierarchical structure derived from oyster shells and their application in heavy metal ions removal

2016 ◽  
Vol 18 (23) ◽  
pp. 15564-15573 ◽  
Author(s):  
Weijie You ◽  
Mingzhu Hong ◽  
HaiFeng Zhang ◽  
Qiuping Wu ◽  
Zanyong Zhuang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Hierarchical Structure ◽  
Calcium Silicate ◽  
Heavy Metal Ions ◽  
Hierarchical Nanostructures ◽  
Potential Applications ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Inorganic hierarchical nanostructures have remarkable potential applications in environmental metal remediation; however, their applications usually suffer from low capacity, high cost, and difficulties in the recycling of adsorbents.

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