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Analysis of heavy metals during composting of the tannery sludge using physicochemical and spectroscopic techniques.
J Hazard Mater. 2009 Jun 15; 165(1-3):111-9.JH

Abstract

The major limitation of direct application of tannery sludge compost in agriculture is the total heavy metal contents and their bioavailability to the soil-plant system. This study focused on the heavy metal characterization and the influence of changing the physicochemical properties of the medium throughout the composting on the concentrations, bioavailability or chemical forms of Cr, Cu, Zn, Pb and Cd in tannery sludge. The study shows that throughout the 60 days of composting, physicochemical analysis and Fourier-transformed infrared (FTIR) spectroscopic characterization show that all parameters elaborated and reached relatively stable levels reflecting the stability and maturity of the final product, and revealed the biodegradation of components that can be easily assimilated by microorganism. The C/N ratio reaches the optimal range of stable compost; inorganic nitrogen is transformed into stable organic forms. The total concentration of Cr, Zn, Cu, Pb and Cd is very low rendering final compost acceptable for agricultural use. The germination index for both Chinese cabbage and lettuce was 97% after 60 days of composting, showing that the final compost was not phytotoxic. Furthermore, in using a sequential extraction method in sludge compost at different phases of treatment, a less than 2% of metals bound to bioavailable fractions X-(KNO(3)+H(2)O). A large proportion of the heavy metals were associated to the residual fraction (75-85%) and more resistant fractions to extraction X-NaOH, X-EDTA, X-HNO(3) (15-25%). Mobile fractions of metals are poorly predictable from the total content. Bioavailability of all fractions of elements tends to decrease.

Authors+Show Affiliations

Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia. Mahdiupm@hotmail.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18990495

Citation

Haroun, Mahdi, et al. "Analysis of Heavy Metals During Composting of the Tannery Sludge Using Physicochemical and Spectroscopic Techniques." Journal of Hazardous Materials, vol. 165, no. 1-3, 2009, pp. 111-9.
Haroun M, Idris A, Omar S. Analysis of heavy metals during composting of the tannery sludge using physicochemical and spectroscopic techniques. J Hazard Mater. 2009;165(1-3):111-9.
Haroun, M., Idris, A., & Omar, S. (2009). Analysis of heavy metals during composting of the tannery sludge using physicochemical and spectroscopic techniques. Journal of Hazardous Materials, 165(1-3), 111-9. https://doi.org/10.1016/j.jhazmat.2008.09.092
Haroun M, Idris A, Omar S. Analysis of Heavy Metals During Composting of the Tannery Sludge Using Physicochemical and Spectroscopic Techniques. J Hazard Mater. 2009 Jun 15;165(1-3):111-9. PubMed PMID: 18990495.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis of heavy metals during composting of the tannery sludge using physicochemical and spectroscopic techniques. AU - Haroun,Mahdi, AU - Idris,Azni, AU - Omar,Syed, Y1 - 2008/09/30/ PY - 2008/06/05/received PY - 2008/09/20/revised PY - 2008/09/22/accepted PY - 2008/11/8/pubmed PY - 2009/7/8/medline PY - 2008/11/8/entrez SP - 111 EP - 9 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 165 IS - 1-3 N2 - The major limitation of direct application of tannery sludge compost in agriculture is the total heavy metal contents and their bioavailability to the soil-plant system. This study focused on the heavy metal characterization and the influence of changing the physicochemical properties of the medium throughout the composting on the concentrations, bioavailability or chemical forms of Cr, Cu, Zn, Pb and Cd in tannery sludge. The study shows that throughout the 60 days of composting, physicochemical analysis and Fourier-transformed infrared (FTIR) spectroscopic characterization show that all parameters elaborated and reached relatively stable levels reflecting the stability and maturity of the final product, and revealed the biodegradation of components that can be easily assimilated by microorganism. The C/N ratio reaches the optimal range of stable compost; inorganic nitrogen is transformed into stable organic forms. The total concentration of Cr, Zn, Cu, Pb and Cd is very low rendering final compost acceptable for agricultural use. The germination index for both Chinese cabbage and lettuce was 97% after 60 days of composting, showing that the final compost was not phytotoxic. Furthermore, in using a sequential extraction method in sludge compost at different phases of treatment, a less than 2% of metals bound to bioavailable fractions X-(KNO(3)+H(2)O). A large proportion of the heavy metals were associated to the residual fraction (75-85%) and more resistant fractions to extraction X-NaOH, X-EDTA, X-HNO(3) (15-25%). Mobile fractions of metals are poorly predictable from the total content. Bioavailability of all fractions of elements tends to decrease. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/18990495/Analysis_of_heavy_metals_during_composting_of_the_tannery_sludge_using_physicochemical_and_spectroscopic_techniques_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(08)01427-1 DB - PRIME DP - Unbound Medicine ER -