scholarly journals Simultaneous Removal of Heavy Metals and Ciprofloxacin Micropollutants from Wastewater Using Ethylenediaminetetraacetic Acid-Functionalized β-Cyclodextrin-Chitosan Adsorbent

ACS Omega ◽  
2021 ◽  
Author(s):  
Monu Verma ◽  
Ingyu Lee ◽  
Shaveta Sharma ◽  
Ravi Kumar ◽  
Vinod Kumar ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Ethylenediaminetetraacetic Acid ◽  
Simultaneous Removal ◽  
Removal Of Heavy Metals

scholarly journals Effect of Soil Washing Solutions on Simultaneous Removal of Heavy Metals and Arsenic from Contaminated Soil

2020 ◽  
Vol 17 (9) ◽  
pp. 3133 ◽  
Author(s):  
Kanghee Cho ◽  
Eunji Myung ◽  
Hyunsoo Kim ◽  
Cheonyoung Park ◽  
Nagchoul Choi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Soil Washing ◽  
Metal Extraction ◽  
Simultaneous Removal ◽  
Removal Of Heavy Metals ◽  
Removal Efficiencies

In this study, we investigated the feasibility of using a solution of sulfuric acid and phosphoric acid as an extraction method for soil-washing to remove Cu, Pb, Zn, and As from contaminated soil. We treated various soil particles, including seven fraction sizes, using sulfuric acid. In addition, to improve Cu, Pb, Zn, and As removal efficiencies, washing agents were compared through batch experiments. The results showed that each agent behaved differently when reacting with heavy metals (Cu, Pb, and Zn) and As. Sulfuric acid was more effective in extracting heavy metals than in extracting As. However, phosphoric acid was not effective in extracting heavy metals. Compared with each inorganic acid, As removal from soil by washing agents increased in the order of sulfuric acid (35.81%) < phosphoric acid (62.96%). Therefore, an enhanced mixture solution using sulfuric acid and phosphoric acid to simultaneously remove heavy metals and As from contaminated soils was investigated. Sulfuric acid at 0.6 M was adopted to combine with 0.6 M phosphoric acid to obtain the mixture solution (1:1) that was used to determine the effect for the simultaneous removal of both heavy metals and As from the contaminated soil. The removal efficiencies of As, Cu, Pb, and Zn were 70.5%, 79.6%, 80.1%, and 71.2%, respectively. The combination of sulfuric acid with phosphoric acid increased the overall As and heavy metal extraction efficiencies from the contaminated soil samples. With the combined effect of dissolving oxides and ion exchange under combined washings, the removal efficiencies of heavy metals and As were higher than those of single washings.

scholarly journals Effect of Dissolved Silicon on the Removal of Heavy Metals from Aqueous Solution by Aquatic Macrophyte Eleocharis acicularis

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 940 ◽  
Author(s):  
Ha T.H. Nguyen ◽  
Masayuki Sakakibara ◽  
Minh N. Nguyen ◽  
Nhuan T. Mai ◽  
Vinh T. Nguyen
Keyword(s):  
Heavy Metals ◽  
Aqueous Solutions ◽  
Metal Toxicity ◽  
Laboratory Experiments ◽  
Aquatic Macrophyte ◽  
Scale Up ◽  
Simultaneous Removal ◽  
Removal Of Heavy Metals ◽  
Removal Efficiencies ◽  
Dissolved Silicon

Silicon (Si) has been recently reconsidered as a beneficial element due to its direct roles in stimulating the growth of many plant species and alleviating metal toxicity. This study aimed at validating the potential of an aquatic macrophyte Eleocharis acicularis for simultaneous removal of heavy metals from aqueous solutions under different dissolved Si. The laboratory experiments designed for determining the removal efficiencies of heavy metals were conducted in the absence or presence of Si on a time scale up to 21 days. Eleocharis acicularis was transplanted into the solutions containing 0.5 mg L−1 of indium (In), gallium (Ga), silver (Ag), thallium (Tl), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) with various Si concentrations from 0 to 4.0 mg L−1. The results revealed that the increase of dissolved Si concentrations enhanced removal efficiencies of E. acicularis for Ga, Cu, Zn, Cd, and Pb, while this increase did not show a clear effect for In, Tl, and Ag. Our study presented a notable example of combining E. acicularis with dissolved Si for more efficient removals of Cu, Zn, Cd, Pb, and Ga from aqueous solutions. The findings are applicable to develop phytoremediation or phytomining strategy for contaminated environment.

scholarly journals The simultaneous removal of heavy metals and organic contaminants over a Bi2WO6/mesoporous TiO2 nanotube composite photocatalyst

RSC Advances ◽  
2020 ◽  
Vol 10 (36) ◽  
pp. 21228-21237
Author(s):  
Lei Cheng ◽  
Sijia Liu ◽  
Guangying He ◽  
Yun Hu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Contaminants ◽  
Dibutyl Phthalate ◽  
Mesoporous Tio2 ◽  
Contaminated Water ◽  
Simultaneous Removal ◽  
Composite Photocatalyst ◽  
Removal Of Heavy Metals ◽  
Nanotube Composites

In this study, Bi2WO6/mesoporous TiO2 nanotube composites (BWO/TNTs) were successfully synthesized to remove the heavy metal Cr(vi) and refractory organic compound dibutyl phthalate (DBP) from contaminated water under visible light.

scholarly journals Simultaneous removal of heavy metals and biodegradation of organic matter with sediment microbial fuel cells

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53433-53438 ◽  
Author(s):  
M. S. Wu ◽  
X. Xu ◽  
Q. Zhao ◽  
Z. Y. Wang
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Simultaneous Removal ◽  
Removal Of Heavy Metals

To in situ remediate rivers polluted by organic matter and heavy metals, lab-scale sediment microbial fuel cells (SMFCs) were operated under different conditions.

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