A high-efficiency Fe2O3@Microalgae composite for heavy metal removal from aqueous solution

2020 ◽  
Vol 33 ◽  
pp. 101026 ◽  
Author(s):  
Li Shen ◽  
Junjun Wang ◽  
Zhanfei Li ◽  
Ling Fan ◽  
Ran Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
High Efficiency ◽  
Metal Removal ◽  
Heavy Metal Removal

Removal of Pb2+, Cu2+, Ni2+, Cd2+ from Wastewater using Fly Ash Based Geopolymer as an Adsorbent

2018 ◽  
Vol 773 ◽  
pp. 373-378 ◽  
Author(s):  
Sujitra Onutai ◽  
Takaomi Kobayashi ◽  
Parjaree Thavorniti ◽  
Sirithan Jiemsirilers
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Heavy Metal ◽  
Fly Ash ◽  
Surface Area ◽  
Removal Efficiency ◽  
High Efficiency ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Removal Capacity

This work aims to evaluate the effectiveness of fly ash based geopolymer powder as an adsorbent for heavy metals in aqueous solution. The structure of synthesized geopolymer was found to be highly amorphous due to the dissolution of fly ash phase. Moreover, the fly ash geopolymer powder has higher surface area compares to original fly ash with specific surface area of 85.01 m²/g and 0.83 m2/g, respectively. For this reason, the geopolymer powder has much higher removal efficiency compared to the original fly ash powder. The removal efficiency was affected by contact time, geopolymer amount, heavy metal initial concentration, pH, and temperature. The four heavy metals were chosen (Pb2+, Cu2+, Ni2+, Cd2+) for adsorption test. The highest heavy metal removal capacity was obtained at pH 5. The geopolymer powder adsorbed metal cations in the order of Pb2+>Cu2+>Cd2+>Ni2+. In addition, Langmuir model is more suitable for fly ash geopolymer powder adsorption of heavy metal ions in aqueous solution than Freundlich model. The results showed that the fly ash geopolymer powder has high efficiency for removal metal which could be employed excellent alternative for wastewater treatment.

scholarly journals Synthesis, Characterization, and Applications of Silk/Bentonite Clay Composite for Heavy Metal Removal From Aqueous Solution

2019 ◽  
Vol 7 ◽  
Author(s):  
Nasira Wahab ◽  
Muhammad Saeed ◽  
Muhammad Ibrahim ◽  
Akhtar Munir ◽  
Muhammad Saleem ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Bentonite Clay

Heavy-metal removal from aqueous solution by fungus Mucor rouxii

2003 ◽  
Vol 37 (18) ◽  
pp. 4486-4496 ◽  
Author(s):  
Guangyu Yan ◽  
Thiruvenkatachari Viraraghavan
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Mucor Rouxii

Highly active MgO nanoparticles for simultaneous bacterial inactivation and heavy metal removal from aqueous solution

2017 ◽  
Vol 312 ◽  
pp. 158-166 ◽  
Author(s):  
Yuncheng Cai ◽  
Chenglei Li ◽  
Dan Wu ◽  
Wei Wang ◽  
Fatang Tan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Bacterial Inactivation ◽  
Mgo Nanoparticles ◽  
Highly Active

Heavy metal removal from aqueous solution by wasted biomass from a combined AS-biofilm process

2006 ◽  
Vol 97 (13) ◽  
pp. 1503-1508 ◽  
Author(s):  
W.C. Chang ◽  
G.S. Hsu ◽  
S.M. Chiang ◽  
M.C. Su
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Biofilm Process

Nonlinear modelisation of heavy metal removal from aqueous solution using Ulva lactuca algae

2011 ◽  
Vol 102 (2) ◽  
pp. 786-796 ◽  
Author(s):  
S. Zakhama ◽  
H. Dhaouadi ◽  
F. M’Henni
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Ulva Lactuca

scholarly journals Comparison of the experimental results with the Langmuir and Freundlich models for copper removal on limestone adsorbent

2019 ◽  
Vol 9 (8) ◽  
Author(s):  
Thair Sharif Khayyun ◽  
Ayad Hameed Mseer
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
High Efficiency ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Equilibrium Concentration ◽  
Freundlich Isotherm ◽  
Isotherm Model ◽  
Batch Adsorption ◽  
Empirical Constant

Abstract The purpose of this study was to investigate the possibility of the limestone as an adsorbed media and low-cost adsorbent. Batch adsorption studies were conducted to examine the effects of the parameters such as initial metal ion concentration C0, particle size of limestone DL, adsorbent dosage and equilibrium concentration of heavy metal Ce on the removal of the heavy metal (Cu) from synthetic water solution by limestone. The removal efficiency is increased with the increase in the volume of limestone (influenced by the media specific area). It has been noted that the limestone with diameter of 3.75 is the most effective size for removal of copper from synthetic solution. The adsorption data were analyzed by the Langmuir and Freundlich isotherm model. The average values of the empirical constant and adsorption constant (saturation coefficient) for the Langmuir equation were a = 0.022 mg/g and b = 1.46 l/mg, respectively. The average values of the Freundlich adsorption constant and empirical coefficient were Kf = 0.010 mg/g and n = 1.58 l/mg, respectively. It was observed that the Freundlich isotherm model described the adsorption process with high coefficient of determination R2, better than the Langmuir isotherm model and for low initial concentration of heavy metal. Also, when the values of amount of heavy metal removal from solution are predicted by the Freundlich isotherm model, it showed best fits the batch study. It is clear from the results that heavy metal (Cu) removal with the limestone adsorbent appears to be technically feasible and with high efficiency.

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