Humic acid characterization and heavy metal behaviour during vermicomposting of pig manure amended with 13C-labelled rice straw

2021 ◽  
pp. 0734242X2110359
Author(s):  
Feng Wang ◽  
Wu Yao ◽  
Weiwen Zhang ◽  
Lijuan Miao ◽  
Yifan Wang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Rice Straw ◽  
Pig Manure ◽  
Fluorescence Excitation ◽  
Cu Content ◽  
Humification Degree ◽  
Zn Bioavailability ◽  
Ultraviolet Absorption Spectroscopy ◽  
Growth And Reproduction

Aiming to reveal the humification process of organic waste and its contribution to the heavy metal behaviour affected by earthworm activity, it was studied about the variation of humic acid (HA) and heavy metal behaviour during vermicomposting of the mixed pig manure and 13C-labelled rice straw. The results showed that earthworms could well adapt to the culturing environment and feed organic matter for its growth and reproduction, the vermicomposting process increased the content of humic substances (HS), HA, and fulvic acid (FA) in substrate residues, but led to less transformation of HA into FA. The elemental, ultraviolet absorption spectroscopy, Fourier transform infrared (FTIR) and fluorescence excitation–emission matrix (EEM) analysis indicated that vermicomposting led to more aromatic structures and much higher humification degree in HA, whereas less protein, FA-like substances and plastein in HA. Vermicomposting could enhance the total Cu content and decrease Cu/Zn bioavailability in the substrate residues, and vermicomposting especially can help stabilize Cu in the substrate residues by forming more complexed HA–Cu.

Changes in the Humic Acid–Metal Complexation Characteristics Depending on Humification Degree / Humīnskābju – Metālu Kompleksveidošanās Rakstura Izmaiņas Atkarībā No Humifikācijas Pakāpes

2012 ◽  
Vol 51 (3) ◽  
pp. 228-237
Author(s):  
D. Dudare ◽  
M. Klavins
Keyword(s):  
Humic Acid ◽  
Stability Constants ◽  
Humic Acids ◽  
Complex Stability ◽  
Peat Layer ◽  
Raised Bog ◽  
Complexing Capacity ◽  
Humification Degree ◽  
Complexation Process ◽  
Complex Stability Constants

The aim of this study is to determine the Cu(II) complexing capacity and stability constants of Cu(II) complexes of humic acids isolated from two well-characterized raised bog peat profiles in respect to the basic properties and humification characteristics of the studied peats and their humic acids. The complex stability constants significantly change within the studied bog profiles and are well correlated with the age and decomposition degree of the peat layer from which the humic acids have been isolated. Among factors that influence this complexation process, molecular mass and ability to form micellar structures (supramolecules) of humic substances are of key importance.

scholarly journals Fabrication of mesoporous lignin-based biosorbent from rice straw and its application for heavy-metal-ion removal

2017 ◽  
Vol 53 ◽  
pp. 132-140 ◽  
Author(s):  
Fang Xu ◽  
Ting-Ting Zhu ◽  
Qing-Quan Rao ◽  
Sheng-Wen Shui ◽  
Wen-Wei Li ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Rice Straw ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal

Heavy metal extraction from an artificially contaminated sandy soil under EDDS deficiency: Significance of humic acid and chelant mixture

Chemosphere ◽  
2010 ◽  
Vol 80 (4) ◽  
pp. 416-421 ◽  
Author(s):  
Theo C.M. Yip ◽  
Dickson Y.S. Yan ◽  
Matthew M.T. Yui ◽  
Daniel C.W. Tsang ◽  
Irene M.C. Lo
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Sandy Soil ◽  
Metal Extraction ◽  
Heavy Metal Extraction

scholarly journals Modified Rice Straw Enhanced Cadmium (II) Immobilization in Soil and Promoted the Degradation of Phenanthrene in Co-Contaminated Soil

2019 ◽  
Vol 20 (9) ◽  
pp. 2189 ◽  
Author(s):  
Ali Mohamed Elyamine ◽  
Mohamed G Moussa ◽  
Javaria Afzal ◽  
Muhammad Shoaib Rana ◽  
Muhammad Imran ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Carbohydrate Metabolism ◽  
Rice Straw ◽  
Cytochrome P450s ◽  
Natural Material ◽  
Metal Availability ◽  
Limited Information ◽  
Polycyclic Aromatic ◽  
Naoh Solution ◽  
Chemical Contaminant

Very limited information is available about heavy metal-polycyclic aromatic hydrocarbons (PAHs) depollution involving the modified natural material in soil. Using phenanthrene and cadmium (Cd) as model, this study investigated the effect(s) of modified rice straw by a NaOH solution and on PAHs, heavy metal availability, and their interactions. Treatment included chemical contaminant with/without modified/unmodified rice straw. Fourier Transform Infrared (FTIR) analysis revealed that certain functional groups including anionic matters groups, which can a complex with Cd2+, were exposed on the modified rice straw surfaces. Therefore, Cd concentration was significantly reduced by about 60%, 57%, 62.5 %, and, 64% in the root, shoot, CaCl2, diethylenetriaminepentaacetic acid (DTPA), and extractable Cd, respectively. Subsequently, the prediction of the functional profile of the soil metagenome using Clusters Orthologous Groups (COGs) and the Kyoto Encyclopedia of Genes and Genomes (KEGG) database revealed that the significantly changed individual COGs belonged to the carbohydrate metabolism, ion transports, and signaling (including cytochrome P450s) categories. This indicated that ion transports might be involved in Cd management, while carbohydrate metabolism, including bisphenol, benzoate, ethylbenzene degradation, and cytochrome P450s, were rather involved in phenanthrene metabolism. The exposed functional group might serve as an external substrate, and P450s might serve as a catalyst to activate and initiate phenanthrene metabolism process. These finding offer confirmation that modified straw could promote the reduction of heavy metal and the degradation of PAHs in soil.

Humic Colloid Generation of Transuranic Elements in Groundwater and Their Migration Behaviour

1986 ◽  
Vol 84 ◽  
Author(s):  
J.I. Kim ◽  
G. Buckau ◽  
W. Zhuang
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Metal Ions ◽  
Fulvic Acid ◽  
Photoacoustic Spectroscopy ◽  
Heavy Metal Ions ◽  
Colloidal Form ◽  
Doc Concentration

AbstractThe generation of humic colloids of Am(III) has been investigated in Gorleben groundwaters containing different amounts of humic substances. Dissolved organic carbon (DOC) in these groundwaters consists mainly of humic acid and fulvic acid, which is present in a colloidal form through aggregation with trace heavy metal ions of groundwater constituents. Concentrations of these heavy metal ions are proportional to the DOC concentration. The generation of Am(III) pseudocolloids through geochemical interactions with humic colloids in different groundwaters is quantified by ultrafiltration as well as ultracentrifugation by the aid of radiometric concentration measurements. The speciation of dissolved Am(III) species in groundwaters is carried out by laser induced photoacoustic spectroscopy (LPAS).

Effect of Compost on the Distribution of Copper in Heavy Metal Contaminated Soil

2014 ◽  
Vol 1030-1032 ◽  
pp. 344-347 ◽  
Author(s):  
Hong Li Huang ◽  
Lin Luo ◽  
Jia Chao Zhang ◽  
Jiao Lian Jiang
Keyword(s):  
Heavy Metal ◽  
Contaminated Soil ◽  
Soluble Fraction ◽  
Water Soluble ◽  
Water Soluble Fraction ◽  
Cu Content ◽  
Mn Oxide ◽  
Mobility Factor ◽  
Compost Amendment ◽  
Compost Application

Pot experiments were carried out to study the effect of compost application amount on the distribution of copper in heavy metal contaminated soil. The results showed that the total Cu content reduced 11.54%, 11.60%, 22.02%, 25.27%, 7.08% and 3.65% after the amendment of 0, 20, 40, 60, 80, 100 g/kg compost to soil with Brassica juncea, respectively. The amount of water-soluble fraction had no correlation with the compost application amount. However, compost amendment decreased the proportion of Cu in the exchangeable and residual fractions, and increased the percentage of Cu in the carbonate bound, Fe-Mn oxide bound and organic-bound Cu. Furthermore, though the mobility factor of Cu decreased slightly only from 16.64% to 16.27-16.52% due to the addition of compost, the addition of compost to soil can immobilize the heavy metal through bound to organic matter and therefore, lowered their mobility and their phytotoxicity.

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