Humic acid-carbon hybrid material as lead (II) ions adsorbent

2017 ◽  
Vol 74 ◽  
pp. 216-223 ◽  
Author(s):  
Shaimaa T. El-Wakeel ◽  
Emad K. Radwan ◽  
Hany H. Abdel Ghafar ◽  
Ahmed S. Moursy
Keyword(s):  
Humic Acid ◽  
Hybrid Material ◽  
Humic Acid Carbon

scholarly journals Effect of Microbial Inoculation on Carbon Preservation during Goat Manure Aerobic Composting

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4441
Author(s):  
Jiawei Lu ◽  
Jingang Wang ◽  
Qin Gao ◽  
Dongxu Li ◽  
Zili Chen ◽  
...  
Keyword(s):  
Humic Acid ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Ph Value ◽  
Trichoderma Viride ◽  
Aerobic Composting ◽  
Microbial Inoculation ◽  
Goat Manure ◽  
Microbial Agents ◽  
Humic Acid Carbon

Carbon is the crucial source of energy during aerobic composting. There are few studies that explore carbon preservation by inoculation with microbial agents during goat manure composting. Hence, this study inoculated three proportions of microbial agents to investigate the preservation of carbon during goat manure composting. The microbial inoculums were composed of Bacillus subtilis, Bacillus licheniformis, Trichoderma viride, Aspergillus niger, and yeast, and the proportions were B1 treatment (1:1:1:1:2), B2 treatment (2:2:1:1:2), and B3 treatment (3:3:1:1:2). The results showed that the contents of total organic carbon were enriched by 12.21%, 4.87%, and 1.90% in B1 treatment, B2 treatment, and B3 treatment, respectively. The total organic carbon contents of B1 treatment, B2 treatment, and B3 treatment were 402.00 ± 2.65, 366.33 ± 1.53, and 378.33 ± 2.08 g/kg, respectively. B1 treatment significantly increased the content of total organic carbon compared with the other two treatments (p < 0.05). Moreover, the ratio of 1:1:1:1:2 significantly reduced the moisture content, pH value, EC value, hemicellulose, and lignin contents (p < 0.05), and significantly increased the GI value and the content of humic acid carbon (p < 0.05). Consequently, the preservation of carbon might be a result not only of the enrichment of the humic acid carbon and the decomposition of hemicellulose and lignin, but also the increased OTU amount and Lactobacillus abundance. This result provided a ratio of microbial agents to preserve the carbon during goat manure aerobic composting.

scholarly journals Biochar changes in soil based on quantitative and qualitative humus compounds parameters

2018 ◽  
Vol 69 (4) ◽  
pp. 234-242 ◽  
Author(s):  
Monika Mierzwa-Hersztek ◽  
Krzysztof Gondek ◽  
Michał Kopeć ◽  
Aleksandra Ukalska-Jaruga
Keyword(s):  
Humic Acid ◽  
Wheat Straw ◽  
Humic Acids ◽  
Fulvic Acids ◽  
Qualitative Composition ◽  
Humic And Fulvic Acids ◽  
Biochemical Processes ◽  
Alternative Sources ◽  
Higher Doses ◽  
Humic Acid Carbon

Abstract Due to the indisputable significance of humus in many biochemical processes as well as its increasing deficit particularly in light soils, alternative sources of substrates for the reproduction of this constituent should be sought. The aim of this study was to evaluate the effect of the addition of wheat straw and wheat straw biochar (in four rates) on quantitative and qualitative humus parameters. The following properties were determined in soil: pH, organic carbon, total nitrogen, humic and fulvic acids, carbon in the extract, non-hydrolysing carbon and spectrophotometric indexes for solution of humic acids including A2/6, A2/4, A4/6. After applying 1% and 2% additions of biochar to the soil, the Corg soil content significantly increased compared to the same doses of thermally unconverted straw. After 254 days of incubation, the addition of biochar to soil at higher doses, decreased the share of humic acid carbon (CHA, CFA) in the Corg content compared to treatments without organic additions and WS treatment. The nonhydrolysing carbon soil content was significantly increased by treatments with 1% and 2% additions of WSB, which indicates greater stabilisation of humus compounds and, at the same time, lower CO2 emission. Soil humic acids amended by treatment with biochar, especially at 1% and 2% doses, were characterised by lower A2/6 and A2/4 ratios. Recognition of changes that may occur in the quantitative and qualitative composition of soil humus after the application of biochar may in the future be helpful information for determining appropriate biochar dose.

Adsorptive removal of hazardous organic water pollutants by humic acid-carbon hybrid materials: kinetics and isotherm study

2017 ◽  
Vol 80 ◽  
pp. 297-305 ◽  
Author(s):  
Emad K. Radwan ◽  
Hany H. Abdel Ghafar ◽  
Ahmed S. Moursy ◽  
Cooper H. Langford ◽  
Ahmed H. Bedair ◽  
...  
Keyword(s):  
Humic Acid ◽  
Hybrid Materials ◽  
Water Pollutants ◽  
Adsorptive Removal ◽  
Isotherm Study ◽  
Humic Acid Carbon

scholarly journals Quantity and Quality of Organic Matter in Soil after Application of Various Organic Materials/Ilość I Jakość Materii Organicznej W Glebie Po Aplikacji Różnych Materiałów Organicznych

2014 ◽  
Vol 21 (3) ◽  
pp. 477-485 ◽  
Author(s):  
Krzysztof Gondek ◽  
Monika Mierzwa
Keyword(s):  
Humic Acid ◽  
Organic Materials ◽  
Residual Effect ◽  
Soil Fertilization ◽  
Alkaline Extract ◽  
The Third ◽  
Degree Of Condensation ◽  
Humic Acid Carbon ◽  
Carbon Concentrations

Abstract Organic carbon concentrations in soil, irrespective of the year of research increased significantly after application of organic materials for the soil fertilization in comparison with the soil from the NPK mineral treatment. The content of low molecular humus compounds extracted from soil using H2SO4 solution was small, regardless of the applied fertilization or year of research. However, after the third year of research a significant increase in this humus fraction content was noted in soil of all treatments where fertilization was applied. After the third year of research, carbon content in alkaline extract rose significantly in soil of all treatments where fertilization with organic materials was applied, in comparison with the soil from mineral NPK treatment. The content of humic acid carbon in soil was lower than fulvic acid carbon, which resulted in lower than one values of Cha : Cfa ratio. However, obtained results point to marked increase in both humus fractions in results of residual effect of applied fertilization. Residual effect of applied fertilization apparently increased the value of absorbance coefficient A4/6, which points to a decreased degree of condensation of humic acid molecule and greater aliphatisation.

Preparation and characterization of humic acid–carbon hybrid materials as adsorbents for organic micro-pollutants

2015 ◽  
Vol 22 (16) ◽  
pp. 12035-12049 ◽  
Author(s):  
Emad K. Radwan ◽  
Hany H. Abdel Ghafar ◽  
Ahmed S. Moursy ◽  
Cooper H. Langford ◽  
Ahmed H. Bedair ◽  
...  
Keyword(s):  
Humic Acid ◽  
Hybrid Materials ◽  
Humic Acid Carbon ◽  
Micro Pollutants

Stability of humic acid carbon under conservation agriculture practices

2022 ◽  
Vol 216 ◽  
pp. 105240
Author(s):  
Ashim Datta ◽  
Madhu Choudhury ◽  
P.C. Sharma ◽  
Priyanka ◽  
H.S. Jat ◽  
...  
Keyword(s):  
Humic Acid ◽  
Conservation Agriculture ◽  
Humic Acid Carbon

LIMITATIONS OF ALKALI-EXTRACTABLE ORGANIC FRACTIONS AS BASES OF SOIL CLASSIFICATION CRITERIA

1984 ◽  
Vol 64 (2) ◽  
pp. 173-186 ◽  
Author(s):  
P. A. SCHUPPLI ◽  
J. A. McKEAGUE
Keyword(s):  
Humic Acid ◽  
Fulvic Acid ◽  
Soil Classification ◽  
Soil Samples ◽  
Classification Criteria ◽  
Acid Fraction ◽  
Fractionation Procedure ◽  
Tenfold Increase ◽  
Organic Fractions ◽  
Humic Acid Carbon

Soil samples, mainly from eastern and northern Canada, were extracted with sodium hydroxide-pyrophosphate and the centrifuged extracts were fractionated into humic acid, fulvic acid and the polyphenolic component of the fulvic acid fraction. Details of the extraction and fractionation procedure were altered systematically and the effects of these changes on amounts of carbon in the various fractions were studied. A tenfold increase in the ratio of soil to extracting solution resulted in a marked increase (nearly double in some cases) in the ratio of humic acid carbon to fulvic acid carbon (Ch/Cf). Increasing the centrifugal force from 1150 × g to 8200 × g had little effect on Ch, but decreased Cf values. Dissolving and reprecipitating humic acid resulted usually in a decrease in Ch/Cf. Different shaking speeds and times, and extraction under nitrogen rather than air had minor, if any, effects on the Ch/Cf ratios. Most of the podzolic B horizons tested could be distinguished from the other 60 horizons by the combination of C ext (extractable carbon), Ch/Cf and Ca/Cf (carbon content of the polyphenols component of the fulvic acid fraction/fulvic acid carbon).Extractable organic fractions have some promise as bases of soil classification criteria but their potential is limited at present. The procedures are time-consuming and exacting, and results are not comparable between laboratories. Rigorous standardization of methods and interlaboratory comparisons of data might lead to more useful criteria based on organic matter composition. Key words: Humic acid carbon, fulvic acid carbon, polyphenols carbon, extractable carbon, classification criteria

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