Fast extraction of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran in sewage sludge and soil samples

2017 ◽  
Vol 52 (4) ◽  
pp. 267-273 ◽  
Author(s):  
Valéria F. Andrade ◽  
Alisson F. S. Durães ◽  
Douglas L. Cassimiro ◽  
Gevany P. de Pinho ◽  
Flaviano O. Silvério
2010 ◽  
Vol 34 (5) ◽  
pp. 1527-1534 ◽  
Author(s):  
João Tavares Filho ◽  
Graziela Moraes de Césare Barbosa ◽  
Adriana Aparecida Ribon

A by-product of Wastewater Treatment Stations is sewage sludge. By treatment and processing, the sludge is made suitable for rational and environmentally safe use in agriculture. The aim of this study was to assess the influence of different doses of limed sewage sludge (50 %) on clay dispersion in soil samples with different textures (clayey and medium). The study was conducted with soil samples collected from native forest, on a Red Latosol (Brazilian classification: Latossolo Vermelho distroférrico) loamy soil in Londrina (PR) and a Red-Yellow Latosol (BC: Latossolo Vermelho-Amarelo distrófico) medium texture soil in Jaguapitã (PR). Pots were filled with 3 kg of air-dried fine earth and kept in greenhouse. The experiment was arranged in a randomized block design with six treatments: T1 control, and treatments with limed sewage sludge (50 %) as follows: T2 (3 t ha-1), T3 (6 t ha-1), T4 (12 t ha-1), T5 (24 t ha-1) and T6 (48 t ha-1) and five replications. The incubation time was 180 days. At the end of this period, the pots were opened and two sub-samples per treatment collected to determine pH-H2O, pH KCl (1 mol L-1), organic matter content, water-dispersible clay, ΔpH (pH KCl - pH-H2O) and estimated PZC (point of zero charge): PZC = 2 pH KCl - pH-H2O, as well as the mineralogy of the clay fraction, determined by X ray diffraction. The results showed no significant difference in the average values for water-dispersible clay between the control and the other treatments for the two soil samples studied and ΔpH was the variable that correlated best with water-dispersible clay in both soils.


2003 ◽  
Vol 46 (4) ◽  
pp. 499-505 ◽  
Author(s):  
Marcilene Ferrari Barriquelo ◽  
Marinês Aparecida Juliatti ◽  
Margarete Soares da Silva ◽  
Ervim Lenzi

Lead (Pb) behavior was studied in soil treated twice with sewage sludge contaminated with lead at interval of 18 months. Soil samples received five different treatments: three with lead [0 (reference); 2,500; 5,000 mug g-1] and two with a mixture of lead and cadmium (interferer) (2,500 + 2,500 and 5,000 + 5,000 mug g-1, respectively). Vases containing treated soil were cultivated with maize in a greenhouse for 75 days. Pb was extracted using nitric perchloric digestion and analyzed by atomic absorption spectroscopy. The soil, containing sewage sludge contaminated by lead presented a higher concentration of Pb. The metal concentration remained constant in all treatments at 20-60 cm depth. No absorption of Pb by the plants was detected.


2019 ◽  
Vol 23 (10) ◽  
pp. 20-23
Author(s):  
L.V. Bryndina ◽  
O.V. Baklanova ◽  
N.M. Il’ina

Studies have been carried out to obtain combined biopreparats obtained on the basis of sewage sludge (WWS) and activated carbon (AC) from plant materials for cleaning soils from contaminants with herbicides. The content of organic matter in the settled sludge is 57.3 %. The organic matter of sewage sludge activates its enzymatic activity. Catalase activity in samples treated with combined sorbents, 2.5 to 2.9 times higher than in control soil samples. The combined use of WWS and activated carbons from plant residues significantly accelerates the decomposition of the herbicide. The presence of WWS increases the efficiency of detoxification of the herbicide (active substance metsulfuron-methyl) with active carbons by 1.7 times.


2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Tae Woong Whon ◽  
Jin-Woo Bae

Members of the genus Humibacter, from the family Microbacteriaceae, have been isolated from sewage sludge compost, agarwood chips, and various soil samples. Here, we report the complete genome sequence of Humibacter aquilariae BT305, the first genome sequence identified within the genus Humibacter, which was isolated from the small intestine of castrated beef cattle.


2006 ◽  
Vol 49 (3) ◽  
pp. 515-526 ◽  
Author(s):  
Ana Tereza Jordão Pigozzo ◽  
Ervim Lenzi ◽  
Jorge de Luca Junior ◽  
Carlos Alberto Scapim ◽  
Antonio Carlos Saraiva da Costa

Agricultural recycling of sewage sludge has been a source of accumulation of heavy metals in the environment which may reach toxic levels and cause serious damage to the biota. Field experiments were undertaken for two agricultural years (2000 and 2002) and effects of two sewage sludge applications were evaluated through the extraction of (essential and non-essential) transition metals by diethylenetriaminepentaacetic acid (DTPA) extractor in a medium texture dystrophic Dark Red Latosol. Cd, Ni, Co, Pb and Cr were not detected. Application of sewage sludge initially caused a slight pH rise in the soil; later pH lowered and kept itself close to the starting level. It could be concluded that through consecutive sludge application, extractable rates of Fe and Mn in soil samples gradually increased during the two agricultural years in proportion to sewage sludge doses and sampling period. In fact, they were higher than rates of control. Due to low concentrations of soil samples, extractor had a restricted capacity for evaluation of its phytoavailability.


2006 ◽  
Vol 54 (4) ◽  
pp. 507-516 ◽  
Author(s):  
M. Cserháti ◽  
B. Krisz ◽  
S. Szoboszlay ◽  
B. Atzél ◽  

Due to changes in the Hungarian legislation, the ATEVSZOLG Corporation, which treats waste of animal origin, has started to search for a new way to dispose and reuse this waste by recycling it without the loss of materials produced at high cost from the natural cycle. Since this waste contains a high concentration of fat, one major objective of the composting experiment was to investigate the effect of composts with high fat contents on the biological activity of the soil. The other aim was to investigate the impact of sterilising heat treatment and of high temperature conditions during the composting process on the number of pathogenic microbes, which are common in waste of animal origin. The quality and quantity of the fat in the soil samples were measured using a gas chromatograph. The effect of the high fat content on the biological activity of the soil was measured as the difference between the control and the treated soil samples for CFU number of fat-degrading microbes and the difference in the biological activity of the samples in an Oxi-Top soil respirator system. The effect of heat treatment on pathogenic microbes was investigated on the basis of the number of Clostridium, faecal coliforms and Pseudomonas aeruginosa microbes. The results showed that the high fat content deposited with the composts was well utilised, and that its degradation did not cause a problem for the microbes living in the soil. This was proved both by the results of the CFU experiments and by the parameters in the Oxi-Top soil respirator system. The heat treatment successfully decreased the number of pathogenic microbes to a low risk level. The results indicated that the mixing of the heat-treated, sterilised basic materials of the composts with untreated, non-sterilised materials such as sewage sludge should be avoided, due to the risk of re-infecting the compost with pathogens. The composts produced from animal waste using the heat treatment developed by the ATEVSZOLG Corp. have the same infection risk as the composts produced from animal manure or sewage sludge.


Author(s):  
Ana Tereza Jordao Pigozzo ◽  
Jorge De Lucas Jr ◽  
Ervim Lenzi ◽  
Carlos Alberto Scapim ◽  
Antonio Carlos Saraiva da Costa

The presence of heavy metals is one of the main hazards against the use of sewage sludge in agronomy. In a field experiment applications of sewage sludge in medium-textured Dark Red Latisol (DRL) were evaluated by the extraction of essential or non-essential metals with a DTPA extractor. The experimental design consisted of randomized blocks subdivided into sections of 6 treatments of sewage sludge (0, 6, 20, 40, 60 and 80 t ha-1) during the first year and (0, 6, 20, 40, 60 and 80 t ha-1) during the second year. The experiment had 4 replications and 5 soil collection periods (0, 30, 60, 90, and 120 days of sludge incorporation). Sewage sludge was applied at a mean depth of 0-20 cm. Soil sampling was undertaken during the periods of sludge incorporation so that the elements available in the soil in different doses could be evaluated Soil samples were analyzed as to fertility level. Concentrations of the metals Cu, Zn, Cd, Ni, Co, Pb, and Cr were determined by atomic absorption in DTPA extractor solution. Concentrations of Cd, Ni, Co, Pb, and Cr were not detected since values were lower than the detection limit of each. Application of sewage sludge increased Cation Exchange Capacity (CEC) and there was an initial pH variation, albeit the latter returned concentration to its original level. Owing to the repetition of applied sludge, Cu and Zn rates in soil samples gradually increased during the two agricultural years caused by an increase in the doses of applied sewage sludge.


2017 ◽  
Vol 53 (3) ◽  
pp. 199-206 ◽  
Author(s):  
Tayane C. R. Mesquita ◽  
Rizia R. Santos ◽  
Ane P. Cacique ◽  
Ludimara J. De SÁ ◽  
Flaviano O. Silvério ◽  
...  

2016 ◽  
Vol 3 (2) ◽  
pp. 26-31 ◽  
Author(s):  
V. Lopushniak ◽  
G. Hrytsulyak

Aim. To determine the impact of energetic willow fertilization with sewage sludge (SS) and manure on the change in the humus state of sod-podzolic soil of Subcarpathia under energetic willow plantation. Methods. Soil samples were collected on the experimental fi eld of Ivano-Frankivsk College of LNAU. The humus con- tent was determined according to DSTU 4289:2004; that of its labile forms – according to DSTU 4732:2007, the content of organic matter in SS and manure – according to GOST 27980-88. Results. The application of sewage sludge for energetic willow grown in sod-podzolic soil of Subcarpathia led to the increase in the total humus content by 0.5–1.1 % compared to the control (without fertilizers). The use of SS preconditioned the change in the humus quality, including the increase in humic acids in humus by 0.05–0.07 %, which promoted the increase in the share of stable humus up to 68–70 % and the stabilization of the humus state of sod-podzolic soil. Conclusions. The application of sewage sludge impacts the change in the indices of humus quality, in particular, its group composition. The level of humic acids content in humus increases with the increase in the dose of the introduced sewage sludge and manure, based thereon. It ensures the increase in the share of stable humus in soil, which, in its turn, conditions the stabilization of humus state of sod-podzolic soil. However, this dependence weakens with depth.


Chemosphere ◽  
2000 ◽  
Vol 40 (9-11) ◽  
pp. 921-927 ◽  
Author(s):  
L Molina ◽  
M Cabes ◽  
J Dı́az-Ferrero ◽  
M Coll ◽  
R Martı́ ◽  
...  

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