Sorption behavior of tylosin and sulfamethazine on humic acid: kinetic and thermodynamic studies

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58865-58872 ◽  
Author(s):  
Xuetao Guo ◽  
Jianhua Ge ◽  
Chen Yang ◽  
Renren Wu ◽  
Zhi Dang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Sorption Behavior ◽  
Thermodynamic Studies ◽  
P Sorption ◽  
Kinetic And Thermodynamic Studies

Sorption and transport of TYL and SMT in soils is complicated and the transportation abilities of TYL and SMT might be weak for the soils rich in organic matter.

scholarly journals Sorption of Sulfonamide Antibiotics to Soil Organic Sorbents: Batch Experiments with Model Compounds and Computational Chemistry

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
J. Schwarz ◽  
S. Thiele-Bruhn ◽  
K.-U. Eckhardt ◽  
H.-R. Schulten
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Diffusion Processes ◽  
Specific Binding ◽  
Complex Structure ◽  
Sorption Behavior ◽  
Batch Experiments ◽  
Sulfonamide Antibiotics ◽  
Model Soil ◽  
Intra Particle Diffusion

Sorption of the sulfonamide antibiotics sulfanilamide, sulfadimethoxine, and sulfapyridine to model soil organic matter was investigated. Therefore, Fluka humic acid and an enzymatically reacted vanillin oligomer were used in batch experiments at pH 4.5, 6.0, and 7.5. Sorption of the amphoteric sulfonamides was nonlinear and pH dependent. At pH 4.5 and 6.0 sorption to both humic acid and oligomer increased in the order sulfanilamide < sulfapyridine < sulfadimethoxine. This was primarily attributed to the sulfonamides' H-bond donor/acceptor properties. Sorption to the oligomer indicated that in addition to π-π interactions with aromatics phenolic, aldehyde and methoxyl moieties of the oligomer are specific binding sites. Stronger sorption to humic acid than to the oligomer was related to the more complex structure and functional group diversity of humic acid. At pH 7.5 sorption sequence was changed to sulfadimethoxine < sulfanilamide < sulfapyridine, indicating a changed sorption behavior due to different sulfonamide speciation. In part sorption non-reversibility was strong. This was attributed to surface complexation, rate-limiting intra-particle diffusion processes and entrapment of sulfonamides in voids of organic matter. Molecular mechanics (MM+) computational modeling using a DOM-trimer model confirmed that H-bonding and dipole-dipole interactions are crucial for entrapment of sulfonamides in voids of organic matter.

Kinetic and thermodynamic studies on the adsorption of U(VI) onto humic acid

2014 ◽  
Vol 54 (9) ◽  
pp. 2541-2545 ◽  
Author(s):  
Ling Li ◽  
Zhen Wei ◽  
Ziying Li ◽  
Juan Wang ◽  
Qisheng Zhou ◽  
...  
Keyword(s):  
Humic Acid ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies

Sorption behavior of nonylphenol (NP) on sewage-irrigated soil: Kinetic and thermodynamic studies

2014 ◽  
Vol 473-474 ◽  
pp. 530-536 ◽  
Author(s):  
Xiaoping Liao ◽  
Caixiang Zhang ◽  
Linlin Yao ◽  
Jiale Li ◽  
Min Liu ◽  
...  
Keyword(s):  
Sorption Behavior ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

Characteristics of fouling due to clay-organic substances in potable water treatment by ultrafiltration

1996 ◽  
Vol 34 (9) ◽  
pp. 157-164 ◽  
Author(s):  
Kim C.-H. ◽  
M. Hosomi ◽  
A. Murakami ◽  
M. Okada
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Humic Acid ◽  
Fulvic Acid ◽  
Size Distribution ◽  
Ultrafiltration Membrane ◽  
Organic Substances ◽  
Decomposition Products ◽  
Microbial Decomposition ◽  
Fouling Materials

Effects of clay on fouling due to organic substances and clay were evaluated by model fouling materials and kaolin. Model fouling materials selected were protein, polysaccharide, fulvic acid, humic acid and algogenic matter (EOM:ectracellular organic matter, microbial decomposition products) and kaolin was selected as the clay material. Polysulfone membrane (MWCO(Molecular Weight Cut-Off) 10,000, 50,000 and 200,000) was used as an ultrafiltration membrane. In particular, the flux measurement of solutions containing algogenic matter used an ultrafiltration membrane of MWCO 50,000. The flux of protein and polysaccharide with coexistence of kaolin increased in the case of the ratio of MW/MWCO being greater than one, but did not increase in the case of the MW/MWCO ratio being below one. In contrast, the flux of fulvic acid and humic acid with coextence of kaolin decreased regardless of the ratio of MW/MWCO. The addition of dispersion agent and coagulant in the organic substances and kaolin mixture solution changed the size distribution of kaolin, and resulted in a change of the flux. EOM and microbial decomposition products decreased with the increase of the fraction of organic matter having molecular weight more than MWCO of membrane. The flux of the algogenic organic matter with coexistence of kaolin decreased with the increase of the amount of kaolin. It was suggested that the decline of the flux with coexistence of kaolin was due to the change of the resistance of the kaolin cake layer corresponding to the change in kaolin size distribution with charge.

Kinetic and thermodynamic studies of novel acid phosphates extracted from Cichorium intybus seedlings

2021 ◽  
Vol 168 ◽  
pp. 195-204
Author(s):  
Umber Zaman ◽  
Rubina Naz ◽  
Noor Saeed Khattak ◽  
Khalil ur Rehman ◽  
Asma Saeed ◽  
...  
Keyword(s):  
Cichorium Intybus ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies

Optimization, kinetic and thermodynamic studies for removal of Brilliant Red (X-3B) using Tannin gel

2014 ◽  
Vol 2 (1) ◽  
pp. 76-83 ◽  
Author(s):  
M. Maria Rahman ◽  
Nahida Akter ◽  
Mohammad Razaul Karim ◽  
N. Ahmad ◽  
Mohammed M. Rahman ◽  
...  
Keyword(s):  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies
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