THE PHYSIOLOGICAL AND CELLULAR STUDY OF TRITICUM TURGIDUM GROWN IN AMENDED SOIL WITH SEWAGE SLUDGE (URBAN AND INDUSTRIAL) IN OPEN FIELDS UNDER SEMI-ARID CLIMATE CONDITIONS

A field experiment was conducted to demonstrate the beneficial and negative aspects of sewage sludge application on wheat and to determine the way of heavy metals in the sludge-soil-plant system. Two types of sewage sludge (urban and industrial) were applied at different rates (5, 25, 50 and 100 t dry matter (DM) per ha). Results showed that growth and yield have been improved by sewage sludge use. However, sewage sludge applications modified the content of heavy metals in plant tissues especially for industrial sewage sludge and high rates where significant accumulations including Co, Cr and Pb, were detected mainly in the roots. This has been coupled by an alteration of the root cellular ultra-structure and the presence of heavy metal deposition as electron-dense granules and crystals.

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Influence and Mechanism of Different pH Values of Extractant on the Leachability of Heavy Metals in Industrial Sewage Sludge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.1000 ◽

2011 ◽

Vol 197-198 ◽

pp. 1000-1004 ◽

Cited By ~ 2

Author(s):

Jing Yong Liu ◽

Shui Yu Sun ◽

Yan Bin Xu ◽

Li Zheng ◽

Shao Song Huang

Keyword(s):

Heavy Metals ◽

Sewage Sludge ◽

Extraction Procedure ◽

Leaching Tests ◽

Ph Values ◽

Leaching Toxicity ◽

Co Precipitation ◽

Adsorption Desorption ◽

Industrial Sewage ◽

Industrial Sewage Sludge

The leaching tests of heavy metals in industrial sewage sludge were carried out under different pH of extractant by the solid waste extraction procedure for leaching toxicity (GB5086.2-1997) of China on the base of the contents and fractions of Zn, Cu, Pb, Cr, Mn and Ni elements. The results showed that the sludge was with higher levels of Mn and Zn, followed by Cu and Ni, while the higher toxicity of Pb and Cr was lower. The fractions of different elements in the sewage sludge had very different forms. The potential migration and biological toxicity were a concern for the active forms of Zn, Mn, Ni, Cr because their active proportions were more than 50%. The pH of extraction solutions had an important impact on the leaching of heavy metals in sewage sludge. The largest concentrations of Zn, Mn, Ni, Cu were appeared when the pH of extractant was about 7, but that of Fe had a greater fluctuation at the same pH. The concentrations of heavy metals had very different at different pH values, which may be related with the process of adsorption/desorption, complexation/dissociation, the dissolution/precipitation/co-precipitation and other chemical reactions in the extractant process.

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ASSESSMENT OF HEAVY METALS LEACHING FROM (BIO)CHAR OBTAINED FROM INDUSTRIAL SEWAGE SLUDGE / IŠ GAMYBINIO NUOTEKŲ DUMBLO PAGAMINTOS BIOANGLIES SUNKIŲJŲ METALŲ IŠPLOVIMO ĮVERTINIMAS

Mokslas - Lietuvos ateitis ◽

10.3846/mla.2015.811 ◽

2015 ◽

Vol 7 (4) ◽

pp. 399-406 ◽

Cited By ~ 10

Author(s):

Julija Pečkytė ◽

Edita Baltrėnaitė

Keyword(s):

Heavy Metals ◽

Sewage Sludge ◽

Total Concentration ◽

Paper Mill ◽

Leaching Tests ◽

Limited Information ◽

Biomass Residues ◽

Industrial Sewage ◽

Industrial Sewage Sludge

Biochar can be produced from many various feedstock including biomass residues such as straw, branches, sawdust and other agricultural and forestry waste. One of the alternatives is to obtain biochar from industrial sewage sludge, however, the use of such a product could be limited due to high quantities of heavy metals in the biochar as a product. Total concentration of heavy metals provides only limited information on the behavior of heavy metals, therefore, batch leaching and up-flow percolation leaching tests were applied to study the leaching of heavy metals (Cd, Pb, Cr, Ni, Zn, Cu) from (bio)char produced from two types of sewage sludge: from paper mill and leather industries. Bioanglis gali būti gaminama iš daugelio įvairių pramonės žaliavų, įskaitant biomasės liekanas, pavyzdžiui, šiaudus, šakas, pjuvenas ir kitas žemės ūkio ir miškininkystės atliekas. Viena iš alternatyvų – bioanglį gaminti iš pramonės nuotekų dumblo, tačiau tokį produktą galima naudoti ribotai dėl jame esančio didelio sunkiųjų metalų kiekio. Iš bendrosios sunkiųjų metalų koncentracijos tyrimų galima tik ribotai spręsti apie sunkiųjų metalų pasiskirstymą, todėl buvo taikomi du tyrimai: tyrimas, perkoliuojant atliekas vienakrypte srove, bei dvipakopis partijos (tyrinio) tyrimas siekiant išanalizuoti sunkiųjų metalų (Cd, Pb, Cr, Ni, Zn, Cu) išplovimą iš bioanglies, pagamintos iš dviejų rūšių nuotekų dumblo: popieriaus gamybos ir odos pramonės.

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Characterization of an Industrial Sewage Sludge and Its Evaluation for Land Application

Iranian Jornal of Toxicology ◽

10.32598/ijt.12.5.536.1 ◽

2018 ◽

Vol 12 (5) ◽

pp. 27-34

Author(s):

Mohsen Mohammadi Galangash ◽

◽

Mostafa Mahdavianpour ◽

Samira Ghafouri Safa ◽

◽

...

Keyword(s):

Heavy Metals ◽

Organic Matter ◽

Sewage Sludge ◽

Organic Contaminants ◽

Sewage Treatment ◽

Land Application ◽

Nutrient Contents ◽

Microbial Contaminants ◽

Industrial Sewage ◽

Industrial Sewage Sludge

Background: Sewage treatment leads to the production of large amount of sludge, containing organic matter and nutrients and considering requirements for recycling could be used as fertilizer. The sludge may also contain various pollutants that pose serious harm to human health and the environment. This study aimed at characterizing the industrial sewage sludge and evaluating its capability as fertilizer with no or a minor pretreatment. Methods: The sludge’s organic matter and nutrient contents, heavy metals, organic and microbial contaminants were determined and compared to literature data and international guidelines. Results: The organic matter, nutrients, phosphorous, and exchangeable potassium contents of the sludge samples were significantly high as follows: 33.6 ± 2.85 %, 6.29 ± 0.16 %, 1.41± 0.01 % and 1.236 g/kg, respectively. The concentration of heavy metals was 94.3 ± 59.5 mg/kg. The concentration of heavy metals, organic contaminants, such as PCBs, BTEX, and PAHs, and microbial contents (coliforms & E. coli) were lower than those reported by other studies. Toluene concentration was high. Conclusions: All characteristics of the sludge samples, except for the toluene and microbial contaminations, were acceptable for its use as land fertilizer. Both toluene and microbial contaminants can be removed, using thermal conditioning as a pretreatment.

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