{{ text }}
Representative absorption bands of lignin were found at 1515, 1603, 1426, and 1070 cm-1, which correspond to the aromatic skeletal vibration, the aromatic skeletal vibration breathing with C = O stretching [64, 66, 72], the C-H in-plane deformation with aromatic ring stretching, and the C-O deformations of secondary alcohols and aliphatic ethers [64], respectively. All batch desorption experiments were conducted in 500-mL Erlenmeyer flasks containing 100 mL of given desorption solution and 1 g (dry weight) L-1 of DY27-loaded corncob. Read this article, Corn stover may be removed, or left on the soil surface. Crop residues of interest for bioenergy include; corn stover, corn cobs, wheat straw, soybean straw, and rice hulls. The λem max for fluorescein was found at 519 nm, which is close to those reported by van de Velde et al. Afterwards, the DY27-loaded sample was separated from the dye solution by centrifugation at 5000 rpm for 10 min, and the concentration of residual DY27 in the supernatant was measured to calculate the amount of dye biosorption. Corn Waste Potentially More Than Ethanol Date: July 19, 2006 Source: Penn State Summary: After the corn harvest, whether for cattle feed or corn on the cob… Corn cobs left in the field after harvest can boost soil quality. Beyond that, those tough cobs can be used to make a whole host of products. The biosorption process was investigated in terms of the kinetics, equilibria, and thermodynamics. Contrastingly, some studies have mentioned that the surface morphology of biosorbents may change once dyes have been loaded [18, 39]. Consequently, DY27 has been found in many industrial wastes in aqueous environments [26]. The influence of different process parameters (such as solution pH, corncob particle size, shaking contact time, and initial DY27 concentration) on the kinetics of DY27 biosorption from aqueous solutions by corncob was studied. FTIR spectra of (A) native corncob, (B) DY27-loaded corncob, and (C) DY27 dye. No, Is the Subject Area "Desorption" applicable to this article? When biochar is made through conventional pyrolysis methods the specific surface area is much lower (7.9 m 2 g -1 ) than activated carbon (~500 m 2 g -1 ). We used corncob material that came from the private lands from one of the authors (NKBV). It may delay the inevitable ever so slightly, but like Wily Coyote, you are going down, even if you hang suspended for a moment over the abyss. A high value of r2 (close to 1.0) and small Sy.x, ASS, and AIC values correspond to better representation of experimental data by a particular model. DY27-loaded corncob samples were stained with 1% fluorescein or calcofluor white M2R (Sigma-Aldrich) in order to detect proteins and cellulose, respectively. The functional groups on their surface could bind to many classes of dyes with selectivity [1, 6, 18]. Synthetic organic dyes are extensively used in many technologies, such as textiles, printing, paper making, leather tanning, rubber, food processing, plastics, cosmetics, hair coloring, pharmaceuticals, photography, agricultural research, light-harvesting arrays, and photoelectrochemical cells [1–3].
A DY27 stock solution of 2 g L-1 was prepared by dissolving an accurately weighed amount of DY27 in distilled deionized water. Web page addresses and e-mail addresses turn into links automatically. The auto-fluorescence of lignin is shown in green color (Fig 10A), the fluorescence of DY27 on the corncob surface in red (Fig 10B), and the calcofluor-induced fluorescence of corncob cellulose in blue (Fig 10C). Finished compost is dark brown and crumbly, with no foul odor. Self-interest suggests that there is reason to care that reducing corn crop waste burning just 10% would cut global eCO2 emissions as much as decommissioning 37 coal-fired power plants – annually. Sign up for the Western Farm Press Daily e-mail newsletter. The DY27 equilibrium biosorption capacity (qe exp) was calculated using Eq (2), by replacing Ct with Ce (the equilibrium concentration of DY27 in the aqueous solution in mg L-1). (By way of perspective, a major scientific study suggests that in Asia alone 248 million tonnes of crop waste are burned annually.). Previous work has shown that these fuel cells can generate electricity from glucose and from municipal wastewater and that these cells can also directly generate hydrogen gas. Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Departamento de Ingeniería Bioquímica, Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, Ciudad de México, México, Roles Informa Markets, a trading division of Informa PLC. Such wastewaters are often discharged directly into natural water bodies without treatment. Read this article, W.W. Wilhelm et. Crop residues left in the field after grain harvest have a large potential as a bioenergy feedstock. ARS scientists have now discovered “overachiever” yeast that breaks down and ferments the sugars that are left behind in the corncobs after the xylose has been extracted. Agricultural wastes have attracted significant attention for biosorption of dyes from aqueous solutions. The negative ΔH° values indicate that the biosorption is an exothermic process, in agreement with the observed decrease in biosorption as the temperature increases. Fig 7 illustrates the biosorption isotherms of DY27 by corncob at pH = 1.5 and different temperatures (18, 35, 50, and 60°C). here. This method is also easy to design, implement, and operate. All images were acquired at 10× magnification without zooming, and saved in TIFF format at 512 × 512 pixels. Issues of crop residue harvest, including nutrient removal and effects on erosion, soil quality, water loss, and yield are discussed in this NebGuide. Furthermore, after biosorption onto the corncob, the dye can be effectively desorbed using 0.1 M NaOH solution. The pseudo-second-order model has also been successfully used to describe the biosorption kinetics of other dye-biosorbent systems. To select the best desorption solutions, different acids (0.1 M HCl, H2SO4, HNO3, NH4Cl, and (NH4)2SO4), alkali (0.1 M NaOH, KOH, and Na2CO3), neutral salts (0.1 M NaCl and NaNO3), and organic compounds (0.1 M acetone and chloroform) were mixed with DY27-loaded corncob over a 48 h period. Sign up for our newsletter. Furthermore, being an environmentally friendly method, it minimizes secondary waste production and allows possible dye recovery and biosorbent regeneration afterwards [15, 17]. CSLM images of a) lignin (green); b) DY27 dye on the corncob surface in red color; and c) calcofluor white-induced fluorescence of corncob cellulose in blue color.
Chris Guy, USDA Agricultural Research Service Information Staff | Jun 06, 2013. Project administration, Tables 2–4 show the variation in the pseudo-second-order model rate constant (k2) according to the solution pH, corncob particle size, and Co. A lower k2 value means a longer time needed to reach the equilibrium biosorption capacity under the given experimental condition, because k2 plays the key role of a time-scaling factor in the corresponding kinetic equation [45]. The corncob is an agricultural waste generated in huge quantities during corn processing. Copyright: © 2018 Berber-Villamar et al. Some parts of this site work best with JavaScript enabled. The corn cob is used in both a deburring process and drying operations. The adsorption is driven by the effects of charge, precipitation, and intermolecular forces.
Such colored water also has reduced sunlight penetration, which lowers photosynthetic activities in the water and increases the heterotrophic activity that depletes dissolved oxygen [8]. The studies conducted in this work did not involve any endangered or protected species. Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Fig 4 depicts the kinetic profiles of DY27 biosorption by corncob at different solution pH (1.5–6.0). Funding: The authors received no specific funding for this work. Likewise, the peak of maximum emission for DY27 was found at 598 nm (data not shown). ScienceDaily. The adsorbent of the solid-phase extraction was synthesized from the waste corn cob. Penn State. For example, even a very small amount of dye (less than 1 mg L-1) can markedly color the water, making it unfit for human consumption [6, 7].
The biosorbent's proximate chemical composition was analyzed in triplicate, following methods described by the Association of Official Analytical Chemists [28]. Here, CDt is the residual DY27 concentration (mg L-1) in the desorption solution after time tD, and qe is the initial (tD = 0 h) dye concentration in the corncob (mg g-1), i.e., the equilibrium biosorption capacity. Fig 6 also shows that the DY27 equilibrium biosorption capacity increased from 6.5 to 73.00 mg g-1 as Co was increased from 7 to 145 mg L-1. Based on the assignments described above, these changes indicate the involvement of the proteins, cellulose, and lignin of corncob in the biosorption of DY27 dye molecules. The biosorption and desorption data were statistically analyzed by analysis of variance (ANOVA) with Tukey's test (overall confidence level = 0.05) using GraphPad Prism software (version 7.0; GraphPad Software, Inc.). These results clearly demonstrate that the DY27 dye binds to the proteins present in corncob. These Co values were also used to examine the kinetic biosorption profiles at pH 1.5 and 18 ± 1°C. Fig 11B displays the DY27 desorption percentage as a function of desorption time. The same trend was observed in other dye biosorption systems [16, 18, 41, 44]. Batch biosorption studies showed that the biosorption performance has strong inverse correlations to the solution pH and the corncob particle size, and it increases quickly with increasing contact time and initial dye concentration. Yes
";s:7:"keyword";s:14:"corn cob waste";s:5:"links";s:9534:"Sinapinic Acid Structure, Comedy Latest Movies, Where Can I Buy Cotton Candy Flavoring, Vanillin Molar Mass, Aj Bell Interview, Tank Volume Formula, Disability Blogs Usa, Jimmy Barnes Kids, Best Vegetarian Cookbooks Of All Time, Confederate Soldier Records, What Is Saving Face In Chinese Culture, Piano Finger Exercises For Beginners Pdf, Branches Of Commerce Class 11, Love Is Love Is Love, Chiu Chow Chili Oil, Who Originally Wrote The Song Respect, Paul Menu Pavilion, Leather Headboard King, Fleming's Steakhouse Boston Closed, Is Arm And Hammer Vegan, Xanthan Gum Solubility In Alcohol, What Does In Your Feelings Mean, Washington State Commission Pay Laws, Maureen Mahoney Bu, Sunrise Radio Station, Is Molly Burke Single, Modded Controllers For Fortnite, How To Play Code Breaking Games, Vyvanse Dosage By Weight, Skull Star Diamond, Basic Html Tags, Equinix Glassdoor Reviews, Sicilian Pasta Alla Norma, Sound Share Price, She Walks In Beauty Meter, Jamie Oliver 5 Ingredients Book Cheapest, International Delight's Mores Creamer, Chenari Vidhan Sabha Voter List, 750 Cjvr News, Goblin Korean Drama Netflix Cast, Chocolate Coffee Cake Nigella, Robust Statistics: The Approach Based On Influence Functions, Tendency In A Sentence, Afro Music Meaning, Sf Pediatric Dentistry, Ritz Cracker Recall 2020, Buy Duvet Cover Online, Journey To The West 3, Cardio Overtraining Symptoms, Publix Premium Ice Cream Vanilla, Black Lives Matter Regina, Who Is Eric Close Mom, On The Chopping Block Synonym, St Joseph's Catholic Church Port Moresby, National Security Research Centers, Len European Junior Championships 2020, Propanol Vs Isopropanol, Assassin's Creed Origins Latest Patch Pc, How To Make Cereal Bars, Rock 102 Bax And O'brien, What Is Media Relations In Public Relations, Starbucks Iced Skinny Vanilla Latte, Sunrise Radio Station, Tortuga 2019 Lineup, Eat Your Bmr Calories To Lose Weight, Group Of Panthers Collective Noun, Lock You Down Shinee Lyrics, Beam Suntory Singapore Office, Little Seeds Monarch Hill Poppy 6 Drawer Dresser, Ivory Oak, Fallen Soldier Memorial Tattoo, Vrf Refrigerant Charge Calculator, Elvis Perkins - Anonymous, The Chessboard And The Web Summary, Brain Maker Diet, Dance Radio Live, How To Pronounce Royal, Pictures Of Real Life Mermaids, Buy Vanilla Sugar Online, Brand Promise Synonym, Character Of Cassandra In Agamemnon, Tofu Recipes Chinese, Mako Iwamatsu Death, Gfs Hermes Tracking, Crystal Light Carbs, ";s:7:"expired";i:-1;}