scholarly journals Removal of chromium (VI) in aqueous solution by oat biomass (Avena sativa)

2017 ◽  
Vol 2 (2) ◽  
pp. 196-205
Author(s):  
Nancy Cecilia Pacheco-Castillo ◽  
Juan Fernando Cárdenas-González ◽  
María de Guadalupe Moctezuma Zarate ◽  
Víctor Manuel Martínez-Juárez ◽  
Adriana Rodríguez-Pérez ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Avena Sativa ◽  
Industrial Wastewater ◽  
Metal Removal ◽  
Effect Of Temperature ◽  
Ph Values ◽  
Chromium Vi ◽  
Removal Capacity ◽  
Oat Biomass

Chromium (VI) removal capacity in aqueous solution by oat biomass was analyzed by the diphenylcarbazide method. Bioadsorption was evaluated at different pH values (1, 2, 3 and 4) and at different times. The effect of temperature in the range of 28 °C to 60 °C and the removal at different initial Cr (VI) concentrations of 200 to 1000 mg/L were also studied. The highest bioadsorption (100% with 100 mg/L of the metal and 1 g of biomass) was at 8 h, at pH of 1.0 and 28 °C. With regard to temperature, the highest removal was to 60 oC, with a 100% removal at 90 min. Removal was more efficient when higher concentrations of biomass were used (100%, 3 h and 5 g of biomass). Untreated biomass (washed and ground biomass) showed excellent metal removal capacity in situ, 82.6% and 85.3% removal in contaminated soil and water, respectively, after 10 days of incubation, using 25 g of the biomass (100 mL of water). These results show that Cr (VI) can be removed from industrial wastewater using oat biomass.

scholarly journals Biosorption of mercury (II) from aqueous solution onto biomass of Aspergillus niger

2018 ◽  
Vol 3 (3) ◽  
pp. 15-25
Author(s):  
Ismael Acosta Rodríguez ◽  
Nancy Cecilia Pacheco-Castillo ◽  
Juan Fernando Cárdenas-González ◽  
Maria de Guadalupe Moctezuma Zarate ◽  
Víctor Manuel Martínez-Juárez ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aspergillus Niger ◽  
Fungal Biomass ◽  
Industrial Wastewater ◽  
Absorption Spectrometry ◽  
Effect Of Temperature ◽  
Contaminated Water ◽  
Spectrometry Method ◽  
Removal Capacity

Mercury (II) removal capacity in aqueous solution by Aspergillus niger biomass was analyzed by the atomic absorption spectrometry method. The fungus grew in 2000 ppm of the metal (20.3%). Biosorption was evaluated at different pH (3.5, 4.5, and 5.5) at different times. In addition, the effect of temperature in the range of 28°C to 45oC and removal at different initial concentrations of Hg (II) from 100 to 500 mg/L were also studied. The highest biosorption (83.2% with 100 mg/L of the metal, and 1 g of biomass) was 24 h at pH of 5.5 and 28oC. With regard to temperature, the highest removal was to 28oC, with an 83.2% removal at 24 h, and at higher biomass concentrations, the removal was most efficient (100% in 12 h with 5 g of biomass). Fungal biomass showed good removal capacity of the metal in situ, 69% removal in contaminated water, after 7 days of incubation and 5 g of biomass (100 mL water), so it can be used to remove industrial wastewater.

scholarly journals Removal of Cobalt (II) from Waters Contaminated by the Biomass of Eichhornia crassipes

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1725
Author(s):  
Ismael Acosta-Rodríguez ◽  
Adriana Rodríguez-Pérez ◽  
Nancy Cecilia Pacheco-Castillo ◽  
Erika Enríquez-Domínguez ◽  
Juan Fernando Cárdenas-González ◽  
...  
Keyword(s):  
Industrial Wastewater ◽  
Eichhornia Crassipes ◽  
Methyl Isobutyl Ketone ◽  
Colorimetric Method ◽  
Effect Of Temperature ◽  
Contaminated Water ◽  
Isobutyl Ketone ◽  
Removal Capacity

Due to the increase in contamination of aquatic niches by different heavy metals, different technologies have been studied to eliminate these pollutants from contaminated aquatic sources. So the objective of this work was to determine the removal of cobalt (II) in aqueous solution by the biomass of the aquatic lily or water hyacinth (Eichhornia crassipes) which, is one of the main weeds present in fresh water, due to its rapid reproduction, growth, and high competitiveness, by the colorimetric method of the methyl isobutyl ketone. The removal was evaluated at different pHs (4.0–8.0) for 28 h. The effect of temperature in the range from 20 °C to 50 °C and the removal at different initial concentrations of cobalt (II) of 100 to 500 mg/L was also studied. The highest bioadsorption (100 mg/L) was at 28 h, at pH 5.0 and 28 °C, with a removal capacity of 73.1%, which is like some reports in the literature. Regarding the temperature, the highest removal was at 50 °C, at 28 h, with a removal of 89%. At the metal and biomass concentrations analyzed, its removal was 82% with 400–500 mg/L, and 100% with 5 g of natural biomass at 20 h. In addition, this completely removes the metal in situ (100 mg/L in contaminated water, at 7 days of incubation, with 10 g of natural biomass in 100 mL). So, the natural biomass can be used to remove it from industrial wastewater, even if in vivo, only eliminate 17.3% in 4 weeks.

Chromium(VI) removal from aqueous solution and industrial wastewater by modified date palm trunk

2014 ◽  
Vol 34 (2) ◽  
pp. 452-460 ◽  
Author(s):  
Sunil Kumar Yadav ◽  
Shishir Sinha ◽  
Dhruv Kumar Singh
Keyword(s):  
Aqueous Solution ◽  
Industrial Wastewater ◽  
Date Palm ◽  
Chromium Vi

scholarly journals Heavy Metal Removal from Aqueous Solution Using Biosurfactants Produced by Pseudomonas aeruginosa with Corn Oil as Substrate

2018 ◽  
Vol 18 (3) ◽  
pp. 472
Author(s):  
Venty Suryanti ◽  
Sri Hastuti ◽  
Tutik Dwi Wahyuningsih ◽  
Mudasir Mudasir ◽  
Dian Kresnadipayana ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Metal Removal ◽  
Corn Oil ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Removal Capacity

The batch removal of Cu(II), Cd(II) and Pb(II) from individual heavy metal ion aqueous synthetic solution using biosurfactants produced by Pseudomonas aeruginosa with corn oil as substrate was investigated. The metal ion removal process of crude preparation biosurfactants (CPB) was established to be dependent on the initial pH and contact time. The optimum metal removal was observed at pH 6.0 of the initial metal solution and 10 min of contact time. The affinity sequence for metal ion removal was Pb(II)>Cd(II)>Cu(II). The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from single metal ions solution were 0.169, 0.276 and 0.323 mg/g, respectively. The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from multi metal ions solution were 0.064, 0.215 and 0.275 mg/g, respectively. The removal capacity of individual metal ion was diminished by the presence of other metal ions in multi metal ions from synthetic aqueous solution. The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from silver industry wastewater were 0.027, 0.055 and 0.291 mg/g, respectively. The results indicated that biosurfactants have potential to be used in the remediation of heavy metals in industrial wastewater.

scholarly journals In situ synthesis of layered double hydroxides on γ-Al2O3 and its application in chromium(VI) removal

2017 ◽  
Vol 75 (6) ◽  
pp. 1466-1473 ◽  
Author(s):  
Shifeng Li ◽  
Fang Qi ◽  
Min Xiao ◽  
Hongtao Fan ◽  
Yanming Shen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxides ◽  
Adsorptive Capacity ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
Chromium Vi ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Double Hydroxides

Mg-Al layered double hydroxides (LDHs) adsorbent was synthesized in situ on γ-Al2O3 for the removal of Cr(VI) from aqueous solution. The material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electronic microscopy and thermogravimetry and differential thermal analysis. Compared to the LDHs powder, the calcined LDHs sorbent prepared in situ on γ-Al2O3 had higher specific surface area and was easy to recover and reuse. The adsorptive capacity for removing Cr(VI) from aqueous solution was resulting from the memory effect of LDHs based on the XRD results. Both the pseudo-second-order kinetic model and the Langmuir model fit the experimental data well. Furthermore, the adsorbent exhibits excellent sorption–regeneration performances.

In situ preparation of “Cr-keeper” nanoparticles – Separation of trace vanadium (V) from chromium (VI) in aqueous solution

2017 ◽  
Vol 186 ◽  
pp. 207-212
Author(s):  
Shibo Duan ◽  
Wei Ma ◽  
Baodong Wang ◽  
Yuzhen Pan ◽  
Fanqing Meng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chromium Vi ◽  
In Situ Preparation

scholarly journals Removal of Chromium(VI) from Contaminated Water Using Untreated Moringa Leaves as Biosorbent

Pollutants ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 51-64
Author(s):  
Chandra Mouli R. Madhuranthakam ◽  
Archana Thomas ◽  
Zhainab Akhter ◽  
Shannon Q. Fernandes ◽  
Ali Elkamel
Keyword(s):  
Removal Efficiency ◽  
Industrial Wastewater ◽  
Metal Removal ◽  
Cost Effective ◽  
Feed Solution ◽  
Hydroxyl Groups ◽  
Docking Simulations ◽  
Chromium Vi ◽  
Leaf Powder ◽  
Significant Achievement

Biosorption of chromium (Cr(VI)) is studied by using raw (chemically not modified) Moringa (Moringa Oleifera) leaf powder without any pretreatment. Cr(VI) is one of the potentially harmful heavy metals found in industrial wastewater. In the Moringa leaf powder, the presence of a significant amount of organic acids form the source for the biosorption of Cr(VI). The concentration of Cr(VI) in the feed solution is varied and different dosages of the proposed biosorbent are used to study its efficiency in the removal of Cr(VI). The concentration of Cr(VI) is varied from 1 ppm to 20 ppm while the amount of biosorbent is varied from 0.5 g to 2.5 g. The equilibrium time for adsorption of Cr(VI) is observed to vary between half an hour and 90 min. The metal removal efficiency varied from 30% to 90% which is a significant achievement compared to other conventional methods which are either energy-intensive or not cost effective. The experimental results are modeled using Langmuir, Freundlich and Redlich–Peterson isotherms. The metal removal efficiency is attributed to the chelating effect of carboxylate and hydroxyl groups present in the moringa leaves and is confirmed from the FTIR analysis. Further molecular docking simulations are performed to confirm the binding of the metal to the speculated sites within the different acids present in the moringa leaves. Untreated green moringa leaf powder used as a biosorbent in this study leads to a sustainable and cheaper option for treating wastewater containing Cr(VI).

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 Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Ronald A. Otavo-Loaiza ◽  
Nancy R. Sanabria-González ◽  
Gloria I. Giraldo-Gómez
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Industrial Wastewater ◽  
Maximum Adsorption Capacity ◽  
Sunset Yellow ◽  
Anionic Dyes ◽  
Ph Values ◽  
Nacl Concentration ◽  
Langmuir And Freundlich Models ◽  
Maximum Removal

The effect of pH, ionic strength (NaCl added), agitation speed, adsorbent mass, and contact time on the removal of tartrazine from an aqueous solution, using an organobentonite, has been studied. A complete factorial design 32 with two replicates was used to evaluate the influence of the dye concentration (30, 40, and 50 mg/L) and amount of adsorbent (25, 35, and 45 mg) on decolorization of the solution. Experimental data were evaluated with Design Expert® software using a response surface methodology (RSM) in order to obtain the interaction between the processed variables and the response. pH values between 2 and 9, stirring speed above 200 rpm, and contact time of 60 min did not have a significant effect on decolorization. The optimum conditions for maximum removal of tartrazine from an aqueous solution of 30 mg/L were follows: pH = 6.0, NaCl concentration = 0.1 M, stirring speed = 230 rpm, temperature = 20°C, contact time = 60 min, and the organobentonite amount = 38.04 mg. The equilibrium isotherm at 20°C was analyzed by means of the Langmuir and Freundlich models, and the maximum adsorption capacity obtained was 40.79 ± 0.71 mg/g. This adsorption process was applied in a sample of industrial wastewater containing tartrazine and sunset yellow, having obtained a decolorization rate higher than 98% for both dyes. These results suggest that organobentonite is an effective adsorbent for the removal of anionic dyes from an aqueous solution.

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