Trace Metal Distributions among the Humic Acid, the Fulvic Acid, and Precipitable Fractions Extracted with NaOH from Sewage Sludges

Holtzclaw, Kenneth M.; Keech, D. A.; Page, A. L.; Sposito, Garrison; Ganje, T. J.; Ball, N. B.

doi:10.2134/jeq1978.00472425000700010025x

Cited by 30 publications

(8 citation statements)

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“…In sewage sludge, most of the copper is associated with the humic fraction, while Zn and Cd are more associated to the precipitate fractions and to the fulvic acids (Holtzclaw et al, 1978).…”

Section: Resultsmentioning

confidence: 99%

Heavy Metal Availability in Soil Amended with Composted Urban Solid Wastes

Jordão

Nascentes

Cecon

et al. 2006

Environ Monit Assess

107

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A study was performed to evaluate the pH and the availability of Zn, Cu, Mn, Pb, and Ni in soil amended with increasing doses of composted solid wastes, collected in Rio de Janeiro, Rio de Janeiro State and in Coimbra, Minas Gerais State, Brazil. The influence of the time elapsed between compost application to the soil and the sampling of the plant growth substrate (soil + compost) for pH and metal availability analyses was also examined. The availability of heavy metals in the soil, in the compost and in the substrate was evaluated using DTPA solution for metal extraction. The increase of the compost doses added to the soil resulted in the increase of the pH in the substrate. The addition of the compost from the bigger city, Rio de Janeiro, resulted in higher increase in soil pH and available Zn, Cu, Pb, and Ni levels as compared to the addition of the compost from the smaller city, Coimbra. Increasing the time elapsed between the compost application to the soil and the sampling of the mixture resulted in higher available Zn, Cu, Mn, and Pb levels. The addition of the compost from Rio de Janeiro resulted in substrate metal concentrations in the order Zn > Pb > Ni > Cu > Mn and for the Coimbra compost the metal concentrations in the substrate was Zn > Pb > Cu > Ni > Mn. The higher values of pH and available metals obtained for the bigger city were attributed to the greatest metal contamination of its compost.

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Section: Resultsmentioning

confidence: 99%

Heavy Metal Availability in Soil Amended with Composted Urban Solid Wastes

Jordão

Nascentes

Cecon

et al. 2006

Environ Monit Assess

107

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“…Humic acid decreased from 133 to 67 g kg −1 in the 0‐ to 82‐mo‐old biosolids, whereas the fulvic acid fraction decreased from 164 to 112 g kg −1 C. Humic acid and fulvic acids are soluble forms of organic matter that form soluble complexes with heavy metals. Holtzclaw et al (1977) observed that almost all of the Cu in biosolids was associated with humic acid. Total polysaccharide contents (Fig.…”

Section: Resultsmentioning

confidence: 99%

Biosolids Decomposition after Surface Applications in West Texas

et al. 2003

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In a semiarid environment, climate is a critical factor in the decomposition of surface-applied biosolids. This study examined the effect of 2- to 7-yr exposure times on the composition of single applications of New York, NY biosolids in western Texas. Exposure time effects on organic matter, N, P, S, Cu, Cr, Pb, Hg, and Zn were studied near Sierra Blanca, TX. Due to organic matter decomposition, total organic C decreased from 340 g kg(-1) in fresh biosolids to 180 g kg(-1) in biosolids after 82 mo of exposure, whereas the inorganic ash content of the biosolids increased from 339 to 600 g kg(-1). Total N decreased from 50 to 10 g N kg(-1) and total S decreased from 12 to 6 g S kg(-1). Bicarbonate-available P in the biosolids decreased from 0.9 to 0.2 g kg(-1). Successive H2O extractions yielded soluble P concentrations consistent with dicalcium phosphate (dical) for fresh biosolids and tricalcium phosphate (trical) for biosolids exposed for 59 months or more. Sparingly soluble phosphates, such as dical and trical, potentially yield > 0.5 mg P L(-1) in runoff waters for extended periods after biosolids applications, especially after multiple applications. Selective dissolution of the biosolids indicated that as much as 66 to 78% of P exists as iron phosphates, 16 to 21% as Fe oxides, and 5 to 12% as insoluble Ca phosphates. Chemical analyses of ash samples suggest that Cu and Zn have been lost from biosolids through leaching or runoff and no losses of Pb, Cr, or Hg have occurred since application.

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“…The corollary to the studies on the form of metals in sewage is that the metals coming from raw sludge determine their presence in the first instance. It is known that metals may be present as inorganic forms such as oxides, hydroxides, sulfides (Mosey et al 1971) or as loose organic complex such as with humic acid or polysaccharides (Holtzclaw et al 1970). Most system of controlling sludge application to the land involve the use of total metal concentration in sludge but in developing criteria to evaluate metals in sludge is essential to understand the nature of fraction present in the soil (Matthews 1984).…”

Section: Introductionmentioning

confidence: 99%

Effect of industrial sludge on concentration and distribution pattern of Lead, Cadmium and Nickel in root, stem and leaf of Red Amaranth (Amaranthus gangeticus L.) in silty clay loam soil

Rauf

Parkplan

Miah³

2013

J. Asiat. Soc. Bangladesh, Sci.

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A pot experiment was carried out to evaluate the concentration and distribution of Lead, Cadmium and Nickel in industrial sludge. The test crop was Red Amaranth (Amaranthus gangeticus L.). Nitrogen was applied comprising the five combinations of different proportion of urea and industrial sludge and a control. Red Amaranth was harvested at 30 and 42 Days after sowing (DAS). Different physical and chemical analysis of soil, sludge, root, stem and leaf of the plant were carried out as required. Heavy metals concentration indicated the trends of Pb>Ni>Cd and distribution pattern of Pb, Cd and Ni were identified Leaf> root> stem, Root> leaf> stem and Root> leaf> stem respectively, both at 30 and 42 DAS with little exception. Industrial sludge had a significant influence on heavy metal concentration and distribution and contaminant food chain, although the data were below the maximum acceptable level.

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Trace Metal Distributions among the Humic Acid, the Fulvic Acid, and Precipitable Fractions Extracted with NaOH from Sewage Sludges

Cited by 30 publications

References 0 publications

Heavy Metal Availability in Soil Amended with Composted Urban Solid Wastes

Heavy Metal Availability in Soil Amended with Composted Urban Solid Wastes

Biosolids Decomposition after Surface Applications in West Texas

Effect of industrial sludge on concentration and distribution pattern of Lead, Cadmium and Nickel in root, stem and leaf of Red Amaranth (Amaranthus gangeticus L.) in silty clay loam soil

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