Simultaneous Desorption and Desorption Kinetics of Phenanthrene, Anthracene, and Heavy Metals from Kaolinite with Different Organic Matter Content

2018 ◽  
Vol 27 (3) ◽  
pp. 200-220 ◽  
Author(s):  
Mohammadi Amir ◽  
Saeedi Mohsen ◽  
Mollahoseini Afsaneh
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Organic Matter Content ◽  
Matter Content ◽  
Desorption Kinetics ◽  
Kinetics Of

Sorption Kinetics of Non-Ionic Organic Pollutants Onto Suspended Sediments

1991 ◽  
Vol 23 (1-3) ◽  
pp. 447-454 ◽  
Author(s):  
H. M. Liljestrand ◽  
Y. D. Lee
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Experimental Studies ◽  
Size Fraction ◽  
Organic Matter Content ◽  
Suspended Sediments ◽  
Spherical Particles ◽  
Particle Model ◽  
Desorption Kinetics ◽  
Kinetics Of

The results of controlled batch experimental studies of the adsorption and desorption kinetics of dichlorobenzene to 1) size fractionated, washed sediments, 2) aggregate, washed sediment, 3) dissolved/colloidal sediment materials, and 4) bulk sediments,are used to determine the effect of inhomogeneous mixtures on the overall sorption rates. The size-segregated sediments are modeled as spherical particles with a porous outer shell of organic matter for sorption and an inert, inorganic core. The characteristic times of intraparticle diffusive transport are found to vary with particle size by about two orders of magnitude. The distribution of natural organic matter content with particle size results in sorption rates which differ greatly from that predicted by the monodisperse, homogeneous particle model. Coupled, reversible reactions between the solute and each solid size fraction are presented as a conceptual model for the interpretation of the empirical results of batch experiments.

scholarly journals Alternativas en la estabilización de lodos provenientes de plantas de tratamiento de aguas residuales

2020 ◽  
Vol 5 (1) ◽  
pp. 23
Author(s):  
Jonathan Gustavo Castillo Sánchez ◽  
Luis David Balarezo Saltos ◽  
María Belén Vinces Obando ◽  
Héctor Andrés Zambrano Rizo
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Wastewater Treatment Plants ◽  
Organic Matter Content ◽  
Matter Content ◽  
Environment And Health ◽  
Sludge Stabilization ◽  
Sludge Characterization ◽  
Class B ◽  
Microbiological Parameters

La contaminación de los lodos que provienen de plantas de tratamiento de aguas residuales, afecta al medio ambiente y  a  la salud, por su contenido  de materia  orgánica, microorganismos y metales pesados. La presente investigación se realizó una caracterización físico-química y microbiológica en cuanto a humedad, proteínas, acidez, análisis del total de nitrógeno básico volátil (TVB-N), materia orgánica, metales pesados y parámetros microbiológicos con la finalidad de establecer la clase de lodo en base a las normativas ambientales internacionales, tales como USEPA, norma de la directiva europea y norma oficial mexicana, debido a la usencia de estas en el Ecuador. La concentración de metales se encuentra entre límite máximo de concentraciones estipulados por las tres normativas analizadas. En cuanto a los resultados de coliformes fecales se obtuvo 2,4x104 UFC/g, correspondiendo a un lodo de clase B según la USEPA; y a un lodo de clase C de acuerdo a la Norma Oficial Mexicana. En el presente se da un panorama general de los diferentes métodos de estabilización de lodos, en el cual se sugiere la utilización de cal debido a evidencias experimentales por diferentes investigaciones, siendo esta una de las más accesibles y eficientes.   Palabras claves— lodo residual, caracterización, estabilización, cal.   Abstract— Contamination of sludge from wastewater treatment plants affects the environment and health, because of their organic matter content, microorganisms and heavy metals. This research carried out a physical- chemical and microbiological characterization in terms of moisture, proteins, acidity, analysis of total volatile basic nitrogen (TVB-N), organic matter, heavy metals and microbiological parameters with the to establish the sludge class based on international environmental regulations, such as USEPA, the standard of the European directive and the official Mexican standard, due to the use of these in Ecuador. The concentration of metals is between the maximum limit of concentrations stipulated by the three regulations analyzed. As for the results of faecal coliforms, 2.4x104  CFUs/g was obtained, corresponding to a Class B sludge according to USEPA; and a Class C sludge according to the official Mexican standard. The present gives an overview of the different methods of sludge stabilization, in which  the use of lime is suggested  due to  experimental evidence by different research, this being one of the most accessible and efficient.   Index Terms— residual sludge, characterization, stabilization, lime.

Evaluation of Different Passivators for the Immobilization of Heavy Metals Incontaminated Soils

2013 ◽  
Vol 409-410 ◽  
pp. 160-163 ◽  
Author(s):  
Da Rong Li ◽  
Ying Hui Wang ◽  
Jian Hua Chen ◽  
Qiu Jun Li ◽  
Wei Sheng Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Soil Ph ◽  
Organic Matter Content ◽  
Potassium Dihydrogen Phosphate ◽  
Hydrated Lime ◽  
Matter Content ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Straw Ash

The effects of hydrated lime, potassium dihydrogen phosphate, straw ash and silkworm excrement on the extractability of heavy metals, pH and organic matter content in soil were studied. The results showed that the application of the four organic-inorganic complex treatments decreased the concentration of available Pb by 22.2 to 48.9 percent, and reduced the concentration of available Cd by 29.1 to 58.4 percent, which was obviously superior to the single organic or inorganic treatments. The addition of hydrated lime had the greatest effects on soil pH, while the application of silkworm excrement significantly increased the organic matter content in soil.

Uptake of heavy metals by darnel multifloral (Lolium multiflorum Lam.) at diverse soil reaction and organic matter content

2013 ◽  
Vol 64 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Jolanta Kwiatkowska-Malina ◽  
Alina Maciejewska
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Lolium Multiflorum ◽  
Organic Matter Content ◽  
Biological Properties ◽  
Matter Content ◽  
Soil Reaction ◽  
Test Plant ◽  
Lead And Zinc ◽  
Cadmium Lead

Abstract Organic matter takes part in all soil processes and influences the physical, chemical and biological properties of soil. The paper presents the analysis of heavy metal contents (Zn, Pb, Cd) in soil and biomass of darnel multifloral (Lolium multiflorum Lam.) cultivated at diverse conditions of soil reaction and organic matter content. A brown coal preparation (Rekulter) was applied as the source of organic matter in autumn 1999 to the studied soil, which was contaminated with cadmium, lead and zinc. The limiting influence of Rekulter on the uptake of heavy metals by darnel multifloral (two cuts of the test plant) was the highest in the case when the largest dose was applied to soil with the highest pH (about 6.0). Bioaccumulation indexes (BI) for Cd, Pb, Zn indicate the mobility and bioavailability of Cd, Pb and Zn in soils. The BI for particular heavy metals were generally low, with the lowest in the case when the largest dose of Rekulter was applied to all cuts of the test plant

The sorption of heavy metals on thermally treated sediments with high organic matter content

2014 ◽  
Vol 160 ◽  
pp. 123-128 ◽  
Author(s):  
Xudong Dong ◽  
Chi Wang ◽  
Hao Li ◽  
Min Wu ◽  
Shaohua Liao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Organic Matter Content ◽  
Matter Content ◽  
High Organic Matter Content ◽  
High Organic Matter ◽  
Thermally Treated

scholarly journals Levels of Lead, Copper, and Zinc in Cabbage (Brassica oleracea sp.) and Lettuce (Lactuca sativa sp.) Grown on Soil Amended with Sewage Sludge

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Bernard Fei-Baffoe ◽  
Jeffery Amo-Asare ◽  
Alhassan Sulemana ◽  
Kodwo Miezah
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Sewage Sludge ◽  
Metal Uptake ◽  
Organic Matter Content ◽  
Matter Content ◽  
Yield Enhancement ◽  
Nitrogen Application ◽  
Application Rates

The study focused on levels of selected heavy metals (Pb, Zn, and Cu) in sewage sludge, soil, and in lettuce and cabbage grown on sewage sludge amended soil. Also, the effect of sewage sludge on soil properties (pH, soil organic matter, and soil conductivity) was studied. Three treatments were used based on nitrogen application rates of the sewage sludge: 100, 150, and 200 kg N/ha for lettuce while 160, 210, and 260 kg N/ha for cabbage. A pot experiment was conducted with pots arranged in a completely randomized design and under local climatic conditions. The study revealed that soil organic matter content and conductivity increased significantly with increasing nitrogen application rates. Levels of heavy metals in the soil increased significantly with increasing application rates. The controls for both plants recorded the lowest heavy metal uptake. Cabbage had an uptake of 0.48 ± 0.13, 1.36 ± 0.23, and 2.60 ± 0.29 mg/kg for Pb, Zn, and Cu, respectively, while lettuce had 0.34 ± 0.19, 1.35 ± 0.31, and 2.30 ± 0.14 mg/kg uptake for Pb, Zn, and Cu, respectively. Highest metal uptake was recorded at the highest application rate in both plants (0.66 ± 0.17, 2.66 ± 0.09, and 4.33 ± 0.14 mg/kg for Pb, Zn, and Cu, respectively, for cabbage and 0.54 ± 0.01, 2.24 ± 0.17, and 3.88 ± 0.19 mg/kg of Pb, Zn, and Cu, respectively, for lettuce). The uptake of Zn and Cu was significant, while Pb uptake was insignificant for both plants. Yields increased significantly with increasing application rates. The study provides information on yield enhancement resulting from cultivating plants on soil amended with sewage sludge and the associated health risk implication.

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