scholarly journals Adsorbent materials obtained from palm waste and its potential use for contaminants removal from aqueous solutions

2019 ◽  
Vol 1386 ◽  
pp. 012036
Author(s):  
S Giraldo ◽  
A P Ramirez ◽  
E Flórez ◽  
N Y Acelas
Keyword(s):  
Aqueous Solutions ◽  
Contaminants Removal ◽  
Palm Waste ◽  
Potential Use ◽  
Adsorbent Materials

Effects of pyrolysis temperature on the physicochemical properties of biochar derived from vermicompost and its potential use as an environmental amendment

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40117-40125 ◽  
Author(s):  
Gang Yang ◽  
Zhanghong Wang ◽  
Qiming Xian ◽  
Fei Shen ◽  
Cheng Sun ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Aqueous Solutions ◽  
Pyrolysis Temperature ◽  
Potential Use

Biochar derived from vermicompost can be employed as an excellent adsorbent for removing contaminants from aqueous solutions.

scholarly journals Turning date palm waste into carbon nanodots and nano zerovalent iron composites for excellent removal of methylthioninium chloride from water

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Munir Ahmad ◽  
Mutair A. Akanji ◽  
Adel R. A. Usman ◽  
Abdullah S. F. Al-Farraj ◽  
Yiu Fai Tsang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Electrostatic Interactions ◽  
Date Palm ◽  
Zerovalent Iron ◽  
Carbon Nanodots ◽  
Maximum Sorption ◽  
Methylthioninium Chloride ◽  
Date Palm Waste ◽  
Synthesized Materials ◽  
Palm Waste

Abstract Novel carbon nanodots (nCD-DBC) and nano zero-valent iron composites (nZVI-DBC) were synthesized using date palm waste-derived biochar (DBC). The synthesized materials were analyzed for chemical and structural composition by using FTIR, SEM, XRD, and TGA, and evaluated for their methylthioninium chloride dye (MB) removal efficiency from contaminated aqueous solutions. pH 7.0 was found optimum for the highest MB removal in sorption batch studies. Kinetics sorption of MB onto the sorbents was best described by pseudo-second-order (R2 = 0.93–0.99) and Elovich models (R2 = 0.86–0.97) implying that sorption was being controlled by chemisorption. Langmuir model predicted maximum sorption capacities for nCD-DBC, nZVI-DBC, and DBC were 1558.66, 1182.90, and 851.67 mg g−1, respectively, which correlated with the results of kinetics sorption. Likewise, nCD-DBC yielded the highest partition coefficient (7067 mL g−1), followed by nZVI-DBC (1460 mL g−1), and DBC (930 mL g−1). Post-sorption XRD, FTIR, and SEM analyses depicted the binding of MB onto the sorbents. It was suggested that electrostatic interactions, π–π electron donor-accepter interactions, degradation, and diffusion were responsible for MB removal by the synthesized materials. Therefore, the nCD-DBC, nZVI-DBC, and DBC can potentially be used for scavenging MB dye from contaminated aqueous solutions.

scholarly journals Molecular dynamics simulation of the Pb(II) coordination in biological media via cationic dummy atom models

2021 ◽  
Vol 140 (2) ◽  
Author(s):  
Iogann Tolbatov ◽  
Alessandro Marrone
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Aqueous Solutions ◽  
Pure Water ◽  
Dynamics Simulation ◽  
Ligand Interaction ◽  
Amber Force Field ◽  
Dummy Atom ◽  
Dynamics Simulations ◽  
Potential Use

AbstractThe coordination of Pb(II) in aqueous solutions containing thiols is a pivotal topic to the understanding of the pollutant potential of this cation. Based on its hard/soft borderline nature, Pb(II) forms stable hydrated ions as well as stable complexes with the thiol groups of proteins. In this paper, the modeling of Pb(II) coordination via classical molecular dynamics simulations was investigated to assess the possible use of non-bonded potentials for the description of the metal–ligand interaction. In particular, this study aimed at testing the capability of cationic dummy atom schemes—in which part of the mass and charge of the Pb(II) is fractioned in three or four sites anchored to the metal center—in reproducing the correct coordination geometry and, also, in describing the hard/soft borderline character of this cation. Preliminary DFT calculations were used to design two topological schemes, PB3 and PB4, that were subsequently implemented in the Amber force field and employed in molecular dynamics simulation of either pure water or thiol/thiolate-containing aqueous solutions. The PB3 scheme was then tested to model the binding of Pb(II) to the lead-sensing protein pbrR. The potential use of CDA topological schemes in the modeling of Pb(II) coordination was here critically discussed.

scholarly journals The effect of pyrolysis temperature and feedstock on date palm waste derived biochar to remove single and multi-metals in aqueous solutions

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Banu Sizirici ◽  
Yohanna Haile Fseha ◽  
Ibrahim Yildiz ◽  
Thomas Delclos ◽  
Abbas Khaleel
Keyword(s):  
Aqueous Solutions ◽  
Date Palm ◽  
Pyrolysis Temperature ◽  
Total Carbon ◽  
Spectroscopic Techniques ◽  
Total Carbon Content ◽  
X Ray ◽  
Date Palm Waste ◽  
Palm Waste ◽  
Palm Leaf

AbstractIn this study, leaf and frond date palm waste as feedstock was used to derive biochars. The effects of pyrolysis temperatures on their physical and chemical properties, and their capacity to remove copper, iron, nickel and zinc from single and multi-metal solutions at various pH values were investigated. Analytical and spectroscopic techniques such as scanning electron microscopy, energy dispersive X-ray, Fourier transform infrared spectroscopy, X-ray diffraction, carbon, hydrogen, nitrogen, sulfur elemental analysis, Brunauer Emmett Teller analysis were conducted for characterization. The pore volume, surface area, pH, and total carbon content of date palm leaf and frond biochar increased while functional groups and hydrogen, nitrogen and oxygen content of biochar decreased with increasing pyrolysis temperature compared to feedstock. The removal efficiencies and sorption capacity for single and mixed metal ions were found between 98 and close to 100% and 2.4 and 3.0 mg g− 1 by leaf and frond biochar samples at pH > 6, respectively. Biochar obtained from different feedstock at different pyrolysis temperature did not show any statistically significant improvements on the removal of single or mixed metals from aqueous solutions. The date palm leaf or frond biochar obtained at low pyrolysis temperature is as effective to remove metals as the ones obtained at high pyrolysis temperatures. Therefore, to consume less energy to produce biochar at lower temperature which exhibits same effective removal efficiency will be a win-win solution in terms of sustainability and economy. As a result, date palm waste biochar can be effectively used to remove metals in water and wastewater.

scholarly journals DNA-Modified Polysulphone Microspheres for Endocrine Disruptors and Heavy Metal Ions Removal

2005 ◽  
Vol 23 (5) ◽  
pp. 387-398 ◽  
Author(s):  
Changsheng Zhao ◽  
Ling Shi ◽  
Xingyi Xie ◽  
Shudong Sun ◽  
Xiangdong Liu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Acridine Orange ◽  
Endocrine Disruptors ◽  
Hydrophobic Interaction ◽  
Heavy Metal Ions ◽  
Heavy Metal Ions Removal ◽  
Potential Use ◽  
Metal Ions Removal

Porous polysulphone (PSf) microspheres were modified by blending DNA into them and immobilizing DNA onto their surfaces. The DNA-modified microspheres, which were stable in water, were then used to remove endocrine disruptors and heavy metal ions from their aqueous solutions. Such microspheres could effectively accumulate pollutant compounds and endocrine disruptors, such as ethidium bromide, Acridine Orange, biphenyl, dibenzofuran and dibenzo- p-dioxin from their aqueous solutions. PSf microspheres without DNA also accumulated and removed endocrine disruptors due to their porosity and the hydrophobic interaction between the endocrine disruptors and PSf. Endocrine disruptors with and without a planar structure were effectively accumulated and removed by the DNA-modified PSf microspheres. In addition, PSf microspheres were found to be capable of selectively removing heavy metal ions such as Zn2+, Cu2+, Mg2+, Cd2+ and Ag+ from their aqueous solutions. These results show that DNA can be used to modify PSf microspheres, with the DNA-modified microspheres having a potential use in environmental applications.

scholarly journals Drug induced micelle-to-vesicle transition in aqueous solutions of cationic surfactants

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3861-3869 ◽  
Author(s):  
Zuber S. Vaid ◽  
Arvind Kumar ◽  
Omar A. El Seoud ◽  
Naved I. Malek
Keyword(s):  
Drug Delivery ◽  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Cationic Surfactants ◽  
Cetyltrimethylammonium Bromide ◽  
Diclofenac Sodium ◽  
Drug Induced ◽  
P Solubilization ◽  
Micellar Aggregates ◽  
Potential Use

Solubilization of the drug diclofenac sodium (DS) in micellar aggregates of ionic liquid-based surfactants and cetyltrimethylammonium bromide at 25 °C induces changes to worm-like micelles and vesicles, with potential use in drug delivery.

Sign in / Sign up

Export Citation Format

Share Document