Effects of a humic deposit (gyttja) on soil chemical and microbiological properties and heavy metal availability

2006 ◽  
Vol 42 (6) ◽  
pp. 585-592 ◽  
Author(s):  
Ayten Karaca ◽  
Oguz Can Turgay ◽  
Nihal Tamer
Keyword(s):  
Heavy Metal ◽  
Metal Availability ◽  
Microbiological Properties

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.

Macroalgae as Biomonitors of Heavy Metal Availability in Coastal Lagoons from the Subtropical Pacific of Mexico

2000 ◽  
Vol 64 (6) ◽  
pp. 846-851 ◽  
Author(s):  
F. Páez-Osuna ◽  
M. J. Ochoa-Izaguirre ◽  
H. Bojórquez-Leyva ◽  
I. L. Michel-Reynoso
Keyword(s):  
Heavy Metal ◽  
Coastal Lagoons ◽  
Metal Availability

scholarly journals The availability of Cd, Pb and Zn and their relationships with soil pH and microbial biomass in soils amended by natural clinoptilolite

2011 ◽  
Vol 51 (No. 1) ◽  
pp. 26-33 ◽  
Author(s):  
G. Mühlbachová ◽  
T. Šimon ◽  
M. Pechová
Keyword(s):  
Heavy Metal ◽  
Microbial Biomass ◽  
Contaminated Soils ◽  
Metal Availability ◽  
Maximum Increase ◽  
Glucose Addition ◽  
Soil Microbial ◽  
Significant Relationships ◽  
Metal Contents ◽  
Natural Clinoptilolite

The relationships among soil microbial biomass, pH and available of heavy metal fractions were evaluated in longterm contaminated soils during an incubation experiment with the amendment of zeolite (natural clinoptilolite) and the subsequent addition of glucose. The values of pH after the addition of glucose decreased during the first day of incubation approximately at about one unit and corresponded with the maximum increase of microbial biomass. The available heavy metal contents extracted by H<sub>2</sub>O, 1 mol/l NH<sub>4</sub>NO<sub>3</sub> and 0.005 mol/l DTPA increased during the first two days of incubation. Only a few significant relationships were found between the available metal contents and pH or microbial biomass. This fact could be ascribed to the different dynamics of the microbial biomass, pH and metal availability after glucose addition, when the highest metal contents during the incubation were usually reached one day later in respect to the greatest changes of pH and microbial activity. In comparison to soils without zeolite addition, the variants with natural clinoptilolite showed lower heavy metal contents in all used extractants with the exception of Cd which in H<sub>2</sub>O extracts tended to increase.

Physicochemical features, metal availability and enzyme activity in heavy metal-polluted soil remediated by biochar and compost

2020 ◽  
Vol 701 ◽  
pp. 134751 ◽  
Author(s):  
Jiayi Tang ◽  
Lihua Zhang ◽  
Jiachao Zhang ◽  
Liheng Ren ◽  
Yaoyu Zhou ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Enzyme Activity ◽  
Polluted Soil ◽  
Metal Availability ◽  
Physicochemical Features

Soil nutrients and heavy metal availability under long-term combined application of swine manure and synthetic fertilizers in acidic paddy soil

2020 ◽  
Vol 20 (4) ◽  
pp. 2093-2106 ◽  
Author(s):  
Muhammad Qaswar ◽  
Liu Yiren ◽  
Huang Jing ◽  
Liu Kaillou ◽  
Muhammad Mudasir ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Soil Nutrients ◽  
Paddy Soil ◽  
Swine Manure ◽  
Metal Availability ◽  
Combined Application ◽  
Synthetic Fertilizers

Heavy metal availability to plants in soils irrigated with wastewater from Mexico City

1995 ◽  
Vol 32 (12) ◽  
pp. 29-34 ◽  
Author(s):  
Christina Siebe
Keyword(s):  
Heavy Metal ◽  
Mexico City ◽  
Metal Uptake ◽  
Metal Availability ◽  
Tolerance Limits ◽  
Aqua Regia ◽  
Untreated Wastewater ◽  
Metal Contents ◽  
Irrigation Time ◽  
The Relationship

The relationship between three different heavy metal fractions in soils irrigated for long periods of time with untreated wastewater from Mexico City and the metal uptake by alfalfa (Medicago sativa) was studied in order to evaluate actual accumulation levels in soils, as well as to establish which extracting solution characterizes most precisely the availability of selected heavy metals to plants. Cd, Pb, Cu and Zn were analyzed in aqua regia, 1 M NH4NO3 and water extracts from 50 soil samples and correlated with total contents in alfalfa tissue collected at the same sites. Heavy metal contents of the 3 fractions increase significantly with irrigation time, but European tolerance limits are slightly exceeded only for Cd at some sites. Plant uptake of Cd and Pb also increases the longer the soils have been irrigated and correlates best with aqua regia extracts from soils.

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