Synthesis of immobilized chitosan/humic acid coupling product for removal of Pb(II), Cd(II) and Cr2O72- from aqueous solutions

2017 ◽  
Vol 87 ◽  
pp. 292-305 ◽  
Author(s):  
Frezah J. Muhana ◽  
Bassam I. El-Eswed ◽  
Fawwaz I. Khalili
Keyword(s):  
Humic Acid ◽  
Aqueous Solutions ◽  
Coupling Product

Humic Acid Functionalized - Silver Nanoparticles as Nanosensor for Colorimetric Detection of Copper (II) Ions in Aqueous Solutions

2020 ◽  
Vol 831 ◽  
pp. 142-150
Author(s):  
Edgar Clyde R. Lopez ◽  
Michael Angelo Zafra ◽  
Jon Nyner L. Gavan ◽  
Emil David A. Villena ◽  
Francis Eric P. Almaquer ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Humic Acid ◽  
Aqueous Solutions ◽  
Limit Of Detection ◽  
Colorimetric Detection ◽  
Hydrodynamic Diameter ◽  
Limit Of Quantification ◽  
Local Surface Plasmon Resonance ◽  
Optical Absorbance ◽  
Absorbance Spectra

Humic acid - functionalized silver nanoparticles (HA-AgNPs) were successfully synthesized and used to detect Cu (II) ions in aqueous solutions. The HA-AgNPs was shown to have an average hydrodynamic diameter of 101.4 nm and a polydispersity index of 0.447. The absorbance spectra of HA-AgNPs showed the characteristic local surface plasmon resonance (LSPR) peak of AgNPs at 408.3 nm. Addition of Cu (II) in the HA-AgNPs led to their agglomeration as evidenced by the change in their surface morphology and their corresponding optical absorbance spectra. The synthesized HA-AgNPs showed a strong linear response for Cu (II) concentrations in the range of 0.00 – 1.25 mM with a limit of detection (LoD) of 4.4428 ± 0.1091 mg L-1, a limit of quantification (LoQ) of 14.8094 ± 0.3636 mg L-1, and a limit of blank (LoB) of 0.1214 ± 0.0065 mg L-1. Statistical analysis showed that this calibration curve could be used to quantify Cu (II) concentrations within a 95% confidence level. Furthermore, HA-AgNPs was found to be selective for Cu (II) detection based on the selectivity study against common metal ions found in drinking water. This shows that the synthesized HA-AgNPs can be used as an environment-friendly colorimetric nanosensor for rapid and point-of-need quantification of Cu (II) ions in aqueous media.

scholarly journals Removal of humic acid from aqueous solutions by a novel hydrogarnet/zeolite composite

2020 ◽  
Vol 2 (11) ◽  
Author(s):  
Hirotaka Maeda ◽  
Kazuya Suzumura ◽  
Toshihiro Kasuga
Keyword(s):  
Humic Acid ◽  
Aqueous Solutions ◽  
Zeolite Composite

The use of an agricultural waste material from Ziziphus jujuba as a novel adsorbent for humic acid removal from aqueous solutions

2015 ◽  
Vol 211 ◽  
pp. 1039-1046 ◽  
Author(s):  
Hadj Daoud Bouras ◽  
Oumessaâd Benturki ◽  
Noureddine Bouras ◽  
Mouloud Attou ◽  
André Donnot ◽  
...  
Keyword(s):  
Humic Acid ◽  
Aqueous Solutions ◽  
Agricultural Waste ◽  
Waste Material ◽  
Ziziphus Jujuba

scholarly journals Efficiency of Photocatalytic Degradation of Humic Acid Using Magnetic Nanoparticles (Fe-doped TiO2@Fe3O4) in Aqueous Solutions

Health Scope ◽  
2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Hossein Moein ◽  
Gholamreza Nabi Bidhendi ◽  
Naser Mehrdadi ◽  
Hossein Kamani
Keyword(s):  
Magnetic Nanoparticles ◽  
Humic Acid ◽  
Aqueous Solutions ◽  
Photocatalytic Degradation ◽  
High Efficiency ◽  
Sol Gel ◽  
Reaction Times ◽  
Doped Tio2 ◽  
Natural Organic Matters ◽  
Uv Lamp

Background: Among water pollutants, Natural Organic Matters (NOMs) are highly important for making problems in water treatment plants. Objectives: The main objective of this study was to investigate the efficiency of photocatalytic degradation of humic acid using magnetic nanoparticles (Fe-doped TiO2@Fe3O4) in aqueous solutions. Methods: In the present experiment, Fe-doped TiO2@Fe3O4 nanoparticles were synthesized by the sol-gel method, and SEM, XRD, and DRS analyzes were utilized to characterize the synthesized nanoparticles. The effects of various variables, including pH (3 - 11), initial concentration of humic acid (20 - 80 mg/L), and concentration of nanoparticles (250 - 2000 mg/L) at different reaction times (15 - 60 min) were investigated on the photocatalytic degradation of humic acid. Results: The maximum degradation efficiency of humic acid at pH 3, the initial humic acid concentration of 5 mg/L, nanoparticle dose of 400 mg/L, and reaction time of 60 min using a 15-W bare UV lamp. Conclusions: Due to the high efficiency of photocatalytic degradation, it is proposed to use for the removal of humic acid from water resources.

Sign in / Sign up

Export Citation Format

Share Document