Use of Corncob Residues (Zea mays) and Activated Carbons Obtained from This Material for the Decontamination of Aqueous Media with Ni2+

The paper summarized the literature data on using ground peels, outer leaves, and garlic roots (Allium sativum L.) as sorption materials to remove various metal ions, dyes, and antibiotics from aqueous media. This paper provides brief information on the amount of waste generated from processing garlic, its chemical composition, and ways of reuse. It gives the adsorption processes parameters and the values of sorption parameters for the studied pollutants. It was shown that garlic residue sorption characteristics for various pollutants could be increased by chemical modification with various chemical reagents. It was determined that the Langmuir model more accurately describes the pollutant’s adsorption isotherms in most cases, and the kinetics of the process more accurately describes the pseudo-second-order model. It was shown that garlic peels and steam are good precursors for activated carbons production.

Download Full-text

Removal of per- and polyfluoroalkyl substances from aqueous media using synthesized silver nanocomposite-activated carbons

Journal of Environmental Health Science and Engineering ◽

10.1007/s40201-020-00597-3 ◽

2021 ◽

Author(s):

Patricia N. Omo-Okoro ◽

Christopher J. Curtis ◽

Ana Miralles Marco ◽

Lisa Melymuk ◽

Jonathan O. Okonkwo

Keyword(s):

Activated Carbons ◽

Aqueous Media ◽

Silver Nanocomposite ◽

Polyfluoroalkyl Substances

Download Full-text

REMOVAL OF POLLUTANTS FROM SEWAGE WITH GRINDED SHELLS OF APRICOT KERNELS

chemistry of plant raw material ◽

10.14258/jcprm.2021038405 ◽

2021 ◽

pp. 39-54

Author(s):

Il'dar Gil'manovich Shaikhiev ◽

Karina Il'darovna Shaikhieva ◽

Svetlana Vasil'yevna Sverguzova ◽

Yuriy Alekseyevich Vinogradenko

Keyword(s):

Natural Waters ◽

Activated Carbons ◽

Raw Materials ◽

Aqueous Media ◽

Total Pore Volume ◽

Chemical Reagents ◽

Sorption Material ◽

Apricot Kernels ◽

Biomass Components ◽

Number Of Publications

A review of the literature data on the use of biomass components of apricot trees (Prunusarmeniaca) as a sorption material for the extraction of various pollutants from waste and natural waters is carried out. The parameters of the sorption interaction at which the highest degree of removal of pollutants is achieved are given. It has been shown that it is possible to increase the sorption capacity of apricot biomass components by modifying it with various chemical reagents. It has been determined that the most studied sorption material is the shell of apricot kernels. It is determined that the largest number of publications is devoted to the use of the latter as raw materials for the production of activated carbons. It was revealed that the surface area and the total pore volume of activated carbons from the kernels of apricot fruits depend on the modes of carbonization and activation of raw materials. It is shown that activated carbons are effective sorbents for removing various pollutants (metal ions, dyes, oil and oil products) from aqueous media. It was found that the adsorption isotherms of pollutants are most adequately described in most cases by the Langmuir and Freundlich models, and the kinetics of the process is most often described by the pseudo-second order model.

Download Full-text

Modeling of Adsorption of Chromium(VI) on Activated Carbons Derived from Corn (Zea mays) Cob

Chemical Product and Process Modeling ◽

10.2202/1934-2659.1377 ◽

2009 ◽

Vol 4 (1) ◽

Cited By ~ 2

Author(s):

John U. Kennedy Oubagaranadin ◽

ZVP Murthy

Keyword(s):

Zea Mays ◽

Activated Carbons ◽

Potassium Dichromate ◽

Agricultural Waste ◽

Waste Product ◽

Fractional Power ◽

Chromium Vi ◽

Isotherm And Kinetic Models ◽

Modeling Of Adsorption ◽

Best Fit

Chromium in its trivalent and hexavalent form in the environment is toxic above certain concentrations. Cr(VI), which is more toxic than Cr(III), was chosen in this work and removed from aqueous solutions of potassium dichromate by adsorption onto physically and chemically activated carbons derived from Zea mays(corn or maize) cob, an agricultural waste product. Adsorption studies were done at the optimum pH of 2 and at the room temperature of 30°C. The aim of the work was to study the adsorption equilibrium and kinetic data with various isotherm and kinetic models. The best fit to the equilibrium data was provided by the 3-parameter Fritz-Schluender model followed by the 2-parameter Langmuir model. The adsorption isotherms were favorable and the adsorption on chemically activated carbons improved as the impregnation ratio was increased. Kinetic modeling showed that the fractional power model provided the best fit followed by the second-order Ritchie's equation. The adsorption of Cr(VI) on the activated carbons was film-diffusion controlled.

Download Full-text

Review of Almond (Prunus Dulcis) Shell Use to Remove Pollutants from Aquatic Environments

Biointerface Research in Applied Chemistry ◽

10.33263/briac116.1486614880 ◽

2021 ◽

Vol 11 (6) ◽

pp. 14866-14880

Keyword(s):

Activated Carbons ◽

Aqueous Media ◽

Prunus Dulcis ◽

Order Model ◽

Chemical Reagents ◽

Adsorption Processes ◽

Pseudo Second Order ◽

Sorption Parameters ◽

Kinetics Of ◽

Sorption Characteristics

We summarized the literature data on using ground almond (Prunus dulcis) green hull and shell as sorption materials to remove various metal ions, dyes, and some organic compounds from aqueous media. This paper provides brief information on the amount of waste generated from processing almonds, their chemical composition, and ways of reuse. It gives the adsorption processes parameters and the values of sorption parameters for the studied pollutants. It was shown that almond shells’ sorption characteristics for various pollutants could be increased by chemical modification with various chemical reagents. It was determined that the Langmuir model more accurately describes the pollutants adsorption isotherms in most cases, and the kinetics of the process in all cases follows the pseudo-second-order model. It was shown that almond hulls and shells are a good precursor for activated carbons production.

Download Full-text

Ultrastructure of Plant Leaf Tissue Infected with Mite-Borne Viral-Like Pathogens

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100067881 ◽

1970 ◽

Vol 28 ◽

pp. 178-179 ◽

Cited By ~ 2

Author(s):

O. E. Bradfute ◽

R. E. Whitmoyer ◽

L. R. Nault

Keyword(s):

Triticum Aestivum ◽

Zea Mays ◽

Electron Microscope ◽

Hordeum Vulgare ◽

Microscope Study ◽

Electron Microscope Study ◽

Leaf Tissue ◽

Leaf Ultrastructure ◽

Double Membrane ◽

Aceria Tulipae

A pathogen transmitted by the eriophyid mite, Aceria tulipae, infects a number of Gramineae producing symptoms similar to wheat spot mosaic virus (1). An electron microscope study of leaf ultrastructure from systemically infected Zea mays, Hordeum vulgare, and Triticum aestivum showed the presence of ovoid, double membrane bodies (0.1 - 0.2 microns) in the cytoplasm of parenchyma, phloem and epidermis cells (Fig. 1 ).

Download Full-text

Identification of maize mosaic virus by immunoelectron microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100142827 ◽

1986 ◽

Vol 44 ◽

pp. 240-241

Author(s):

O. E. Bradfute

Keyword(s):

Zea Mays ◽

Mosaic Virus ◽

Immunoelectron Microscopy ◽

Severe Disease ◽

Maize Mosaic Virus ◽

The World ◽

Plant Rhabdovirus

Maize mosaic virus (MMV) causes a severe disease of Zea mays in many tropical and subtropical regions of the world, including the southern U.S. (1-3). Fig. 1 shows internal cross striations of helical nucleoprotein and bounding membrane with surface projections typical of many plant rhabdovirus particles including MMV (3). Immunoelectron microscopy (IEM) was investigated as a method for identifying MMV. Antiserum to MMV was supplied by Ramon Lastra (Instituto Venezolano de Investigaciones Cientificas, Caracas, Venezuela).

Download Full-text