scholarly journals Removal of Acidic Dyes from Aqueous Media Using Citrullus Lanatus Peels: An Agrowaste-Based Adsorbent for Environmental Safety

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Shoomaila Latif ◽  
Rabia Rehman ◽  
Muhammad Imran ◽  
Shahid Iqbal ◽  
Ayesha Kanwal ◽  
...  
Keyword(s):  
Citrullus Lanatus ◽  
Aqueous Media ◽  
Sorption Isotherms ◽  
Environmental Safety ◽  
Agitation Speed ◽  
Batch Mode ◽  
Sorption Data ◽  
Chemically Modified ◽  
Bulk Scale ◽  
Water Melon

In this work, removal of fluorescein and eosin dyes using common agrowaste, i.e., peels of water melon (Citrullus lanatus) (WMP), has been studied in the batch mode. The sorbent material (WMP) was characterized by using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. The sorbent was chemically modified by subjecting it to 0.1 N HNO3 and 0.1 N NaOH solutions. Different parameters such as sorbent dose, pH, temperature, and agitation speed were optimized to investigate the sorbent efficiency for fluorescein and eosin dyes. Among three forms (raw, base-treated, and acid-treated), the base-treated form exhibited higher removal efficiency, followed by acid-treated and then the raw form. Generally, range for the removal of fluorescein and eosin was found to be 48.06–88.08% and 48.47–79.31%, respectively. Mathematical modeling of sorption data by Langmuir and Freundlich sorption isotherms and thermodynamic investigations were carried out to check the suitability of these agrowaste materials on bulk scale. The promising results concluded that peel of water melon (common agrowaste) can be potentially utilized for the removal of toxins.

Removal of Cadmium(II) and Lead(II) from Water by Chemically Treated Citrullus lanatus Peels as Biosorbent in Cost Effective Way

2020 ◽  
Vol 71 (5) ◽  
pp. 182-192
Author(s):  
Shoomaila Latif ◽  
Rabia Rehman ◽  
Muhammad Imran ◽  
Muhammad Sadiq Hussain ◽  
Shahid Iqbal ◽  
...  
Keyword(s):  
Citrullus Lanatus ◽  
Cost Effective ◽  
Sorption Mechanism ◽  
Batch Mode ◽  
Chemically Modified ◽  
Acid And Base ◽  
Pseudo Second Order ◽  
Bulk Scale ◽  
Cadmium And Lead ◽  
Metal Ions Removal

This study presents the use of Citrullus lanatus peels for the removal of Cd(II) and Pb(II) using batch mode. Their chemically modified acid and base treated forms were utilized for biosorption studies by optimizing all parameters. Results indicated that base modified Citrullus lanatus peels were more effective for removal of these metal ions. Removal efficiency for cadmium and lead was found to be 92.32-94.1 % and 91.94-92.58 %, respectively. Isothermal and thermodynamic investigations were carried out to find sorption mechanism and their suitability to use on bulk scale. Promising sorption capacity values for Cd(II) 19.310 mg/g and Pb(II) 25.775 mg/g, along with pseudo-second order mode and exothermic thermodynamic nature; all these favour their use for industrial scale water treatment.

scholarly journals Isothermal and Kinetic Investigation of Exploring the Potential of Citric Acid-Treated Trapa natans and Citrullus lanatus Peels for Biosorptive Removal of Brilliant Green Dye from Water

2021 ◽  
Vol 2021 ◽  
pp. 1-23
Author(s):  
Muhammad Sadiq Hussain ◽  
Rabia Rehman ◽  
Muhammad Imran
Keyword(s):  
Citric Acid ◽  
Contact Time ◽  
Brilliant Green ◽  
Citrullus Lanatus ◽  
Agitation Speed ◽  
Trapa Natans ◽  
Initial Ph ◽  
Pseudo Second Order ◽  
Bulk Scale ◽  
Adsorbent Dose

Trapa natans peels (TNPs) and Citrullus lanatus peels (CLPs) were utilized for the biosorptive removal of brilliant green dye (BGD), after modifying with citric acid. Characterization and surface morphology were studied by Fourier transform infrared spectroscopy and scanning electron microscopy. For the removal of BGD by citric acid-treated Trapa natans peels (CA-TNPs), the optimum conditions were obtained with adsorbent dose 0.8 g, contact time 25 minutes, initial pH 5, temperature 30°C, and agitation speed 100 rpm, while for the citric acid-treated Citrullus lanatus peels (CA-CLPs), adsorbent dose 0.8 g, contact time 20 minutes, pH 5, temperature 30°C, and agitation speed 100 rpm gave optimum results. The qmax values obtained were 108.6, 128, 144.9, and 188.68 mg/g for R-TNP, CA-TNP, R-CLP, and CA-CLP, respectively, while the correlation coefficient (R2) values obtained were 0.985, 0.986, 0.985, and 0.998 for R-TNP, CA-TNP, R-CLP, and CA-CLP, respectively. These favor the Langmuir isotherm and pseudo-second-order kinetics, with negative (ΔG0) values of all adsorbents, determining that the adsorption phenomenon is exothermic and spontaneous in nature. Both citric acid-treated peels of Trapa natans and Citrullus lanatus were found suitable for bulk-scale eradication of hazardous, toxic, and carcinogenic basic cationic dyes.

scholarly journals Phytochemical screening and antifungal potentials of Citrus limon peels against Fusarium oxysporum and Rhizopus stolonifer causing rots in water melon (Citrullus lanatus L.)

2020 ◽  
pp. 17-21
Author(s):  
L.U. Bashir ◽  
A. Abdulkadir ◽  
M. M. Shah ◽  
A. Hamisu ◽  
U. Sharif ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Citrullus Lanatus ◽  
Citrus Limon ◽  
Pathogenicity Test ◽  
Phytochemical Screening ◽  
Rhizopus Stolonifer ◽  
Methanol Extracts ◽  
Antifungal Potential ◽  
Phytochemical Constituents ◽  
Water Melon

This study investigated the phytochemical constituents and antifungal potential of Citrus limon peels using aqueous and methanol extracts against Fusarium oxysporum and Rhizopus stolonifer causing rots in water melon. The result of phytocemical screening revealed the presence of Saponin, Tannin, Phenols, Alkaloid and Flavanoid. Pathogenicity test conducted showed that F. oxysporum and R. stolonifer causes rots of Citrullus lanatus. The extracts inhibited the growth of F. oxysporum (76.67% and 60.00 %) methanol and aqueous respectively. R. stolonifer growth was inhibited (85.93% and 71.11%) methanol and aqueous extracts. The fungitoxicity of synthetic fungicide Benomyl was 95.56%. The methanol extracts has highest inhibitory activity than aqueous extract. The result of the findings indicates the Biofungicide potentials of Citrus limon peels as alternative to synthetic fungicide in management of phyto-pathogens of water lemon.

scholarly journals Adsorption of Cd (II), Pb (II) and Cr (III) on chemically modified Euterpe Oleracea biomass for the remediation of water pollution

2020 ◽  
Vol 43 ◽  
pp. e50263
Author(s):  
Affonso Celso Gonçalves Junior ◽  
Daniel Schwantes ◽  
Elio Conradi Junior ◽  
Juliano Zimmermann ◽  
Gustavo Ferreira Coelho
Keyword(s):  
Sorption Isotherms ◽  
Point Of Zero Charge ◽  
Heterogeneous Structure ◽  
Euterpe Oleracea ◽  
Sem Images ◽  
Chemically Modified ◽  
Pseudo Second Order ◽  
Ir Analysis ◽  
Central Composite ◽  
The Ideal

This study evaluated the use of Euterpe oleracea endocarp after chemical modification with H2O2, H2SO4 and NaOH for the removal of Cd2+, Pb2+ and Cr3+ from water. Therefore, the adsorbent was characterized for its chemical composition, Fourier Transform Infrared (FTIR) analysis, Scanning Electron Microscope (SEM) images, and pH of point of zero charge (pHPZC), thermal stability and porosimetry. Adsorption tests were conducted by using a Central Composite Design (CCD). Pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion models evaluated the adsorption kinetics, and sorption isotherms were linearized according to Langmuir, Freundlich and Dubinin-Radushkevich. The effect of initial concentration, temperature in the process and the desorption were also analyzed. SEM results showed that the açaí adsorbents (or CA) had irregular and heterogeneous structure, and IR analysis evidenced the presence of hydroxyl, aliphatic, phenolic and carboxylic surface groups; both analyses indicate favorable adsorption characteristics. The pHPZC of the adsorbent is 4.41, 4.02 and 7.10 for CA modified with H2O2, H2SO4 and NaOH, respectively. The optimum adsorption conditions were pH 5.0, within 40 min, with 4 g L-1 as the ideal adsorbent dose. The predominance of chemisorption occurs, in mono and multilayer. The adsorption is only spontaneous for Cd2+ at 15 and 25°C. The CA has the potential to increase the removal efficiency of Cd, Pb and Cr, when chemically modified, particularly with H2O2 and H2SO4.

scholarly journals Zn sorption on Ca-illite and Ca-smectite: experiment and modelling

2019 ◽  
Vol 98 ◽  
pp. 04008
Author(s):  
Christelle Latrille ◽  
Aubéry Wissocq ◽  
Catherine Beaucaire
Keyword(s):  
Ion Exchange ◽  
Clay Minerals ◽  
Sorption Isotherms ◽  
Ion Exchanger ◽  
Natural Environments ◽  
Sorption Site ◽  
Batch Experiments ◽  
Sorption Data ◽  
Relevant Role ◽  
Site Types

To predict Zn behaviour in soil, the retention properties of clay minerals plays a relevant role. In a continental environment, Ca is the main cation in solution. Soil reactivity may be reduced to sorption properties of Zn and Ca on illite and smectite, the major clay minerals in soil. With this assumption, a multi-site ion exchanger model has successfully been applied to the Zn sorption on Ca-illite and Ca-smectite. New batch experiments performed in this study enabled to collect sorption data for Zn on Ca-illite by concentration and pH isotherms. Zn sorption reversibility was then verified. These sorption data were modelled successfully with a multi-site ion exchanger (MSIE) formalism by using four sorption site types. Zn sorption isotherms on smectite were retrieved from literature and interpreted following the MSIE formalism. The obtained selectivity coefficients may be thereafter put into ion exchange models to describe the Zn sorption in natural environments.

scholarly journals Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Gels ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 12 ◽  
Author(s):  
Mohammed F. Hamza ◽  
Amal E. Mubark ◽  
Yuezou Wei ◽  
Thierry Vincent ◽  
Eric Guibal
Keyword(s):  
Ph Effect ◽  
Sorption Isotherms ◽  
Environmental Safety ◽  
Sorption Properties ◽  
Yellow Cake ◽  
Maximum Sorption Capacity ◽  
Copper Precipitation ◽  
Protonated Amine ◽  
Maximum Sorption ◽  
Pre Treatment

The necessity to recover uranium from dilute solutions (for environmental/safety and resource management) is driving research towards developing new sorbents. This study focuses on the enhancement of U(VI) sorption properties of composite algal/Polyethylenimine beads through the quaternization of the support (by reaction with glycidyltrimethylammonium chloride). The sorbent is fully characterized by FTIR, XPS for confirming the contribution of protonated amine and quaternary ammonium groups on U(VI) binding (with possible contribution of hydroxyl and carboxyl groups, depending on the pH). The sorption properties are investigated in batch with reference to pH effect (optimum value: pH 4), uptake kinetics (equilibrium: 40 min) and sorption isotherms (maximum sorption capacity: 0.86 mmol U g−1). Metal desorption (with 0.5 M NaCl/0.5 M HCl) is highly efficient and the sorbent can be reused for five cycles with limited decrease in performance. The sorbent is successfully applied to the selective recovery of U(VI) from acidic leachate of uranium ore, after pre-treatment (cementation of copper, precipitation of rare earth elements with oxalate, and precipitation of iron). A pure yellow cake is obtained after precipitation of the eluate.

scholarly journals Engineering Functionalized Chitosan-Based Sorbent Material: Characterization and Sorption of Toxic Elements

2019 ◽  
Vol 9 (23) ◽  
pp. 5138 ◽  
Author(s):  
Adnan Khan ◽  
Nisar Ali ◽  
Muhammad Bilal ◽  
Sumeet Malik ◽  
Syed Badshah ◽  
...  
Keyword(s):  
Experimental Data ◽  
Sorption Isotherms ◽  
Analytical Techniques ◽  
Aqueous Environment ◽  
X Ray Diffraction ◽  
Sorption Data ◽  
Regression Methods ◽  
Sorbent Material ◽  
Lead And Cadmium ◽  
Cadmium And Lead

The present study reports the engineering of functionalized chitosan (CH)-based biosorbent material. Herein, a two-step reaction was performed to chemically modify the CH using 1,4-bis(3-aminopropyl) piperazine to incorporate nitrogen basic centers for cations sorption from the aqueous environment. The resultant functionalized chitosan-based sorbent material was designated as CH-ANP and characterized using various analytical techniques, including elemental analysis, Fourier-transform infrared spectroscopy (FTIR), 13C NMR (in solid-state), X-ray diffraction, and thermal analysis. Then, the newly engineered CH-ANP was employed for the removal of copper, lead, and cadmium in the aqueous medium. Langmuir sorption isotherm analysis revealed that the highest sorption abilities achieved were 2.82, 1.96, and 1.60 mmol g−1 for copper, cadmium, and lead, respectively. Linear and nonlinear regression methods were deployed on the sorption data to study the behavior of the Langmuir, the Freundlich, and the Temkin sorption isotherms. Among the four different forms, the Langmuir isotherm type 1 fit well to the experimental data as compared to the other models. It also showed the lowest values of error, and a higher correlation coefficient than the Freundlich and Temkin models; thus it was the best fit with the experimental data compared to the latter two models. In conclusion, the findings suggest that chemically modified novel materials with enhanced Lewis basic centers are useful and promising candidates for the sorption of various toxic cations in aqueous solution.

scholarly journals New carbon from low cost vegetal precursors: acorn and cypress cone

2013 ◽  
Vol 11 (12) ◽  
pp. 2012-2021
Author(s):  
Giovanni Toscano ◽  
Giuseppe Cimino
Keyword(s):  
Methylene Blue ◽  
Low Cost ◽  
Chemical Properties ◽  
Sorption Isotherms ◽  
Surface Chemical ◽  
Sodium Dodecylbenzenesulfonate ◽  
Sorption Data ◽  
Treatment Changes ◽  
Mass Titration ◽  
Minor Extent

AbstractThermal-treated carbons from acorn and cypress cone were prepared and characterized. The uptakes of heavy metal ions (Ag+, Cd2+ and Cr+3) and organics (phenol, methylene blue and sodium dodecylbenzenesulfonate) from aqueous solution have been studied. Effects of activation by HCl and HNO3 acids on the sorption properties of these carbons were investigated by mass titration, sorption isotherms, IRS, SEM and XRS. The models of Langmuir and Freundlich do not represent our sorption data very well. An earlier proposed empirical correlation is applied successfully to carry out a parameter of comparison between the studied carbons. The acidic treatment changes the surface chemical properties of the two thermal-treated carbons lowering their sorption performances. The carbons show good capacities to uptake metals, phenol and methylene blue, but sodium dodecylbenzenesulfonate is removed from its solutions to minor extent. The up-taking properties are found similar to those of two worldwide used commercial grade carbons.

Sign in / Sign up

Export Citation Format

Share Document