Influence of humate-solute interactions on aqueous heavy metal ion levels

Beveridge, A.; Pickering, W.F.

doi:10.1007/bf00291834

Cited by 49 publications

(11 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the absorptive capacity of the humic substances for metal ions was found greater than that of many clays, and varied more with changes in pH. 20 In our study, total metals contents were found to vary at different depths of soils, mostly along with organic matter content and cation exchange capacity of the soils. But exchangable amounts of these metals were found to vary with the pH, having higher available and lower total metals contents in an acidic soil pH at sampling point I.…”

Section: Discussioncontrasting

confidence: 46%

“…The tendency of metal ion to hydrolyse could also be responsible for part of the observed response to pH change. 20 The interaction of metal ions with the soil may, for example, facilitate a loss of protons from residual coordinated water molecules and so promote further bridging effects. Non-sorbed cations would certainly tend to precipitate as polymeric hydroxy species once the appropriate pH is exceeded.…”

Section: Discussionmentioning

confidence: 99%

“…The high organic matter content means that cations are bound more or less covalently in addition to those held electrostatically. 20 However, the exchangeable amounts of ions vary with pH and the electrolyte levels. Bolter 14 ' 15 have studied the mechanisms of organic matter in soils and reported that a uniform distribution of heavy metals can occur only if the organic matter is high and uniformly distributed throughout the soils.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Release and behaviour of Cr, Mn, Ni and Pb in a fly‐ash/soil/water environment: column experiment

Fulekar

Dave

1991

International Journal of Environmental Studies

View full text Add to dashboard Cite

A column experiment study has been carried out in order to understand the phenomenon of leaching of selected trace elements like Cr, Mn, Ni and Pb by the action of acidic rain water on a fly-ash/soil bed in a water environment, fly-ash/soil such as in a landfill area of fly-ash disposal sites. Metals measured at depth of 8 , 16 and 24 of soils in columns showed variation in concentrations. However, a lower pH with lower total metals and higher available metals concentrations in a top layer soil than in subsequent lower layers of alluvial soils have been observed. pH has been found as one of the most important parameters in regulating the change in available and total metal content in layers of soils. Metals retention in soil and their release into leachate water were also found to be dependent on organic matter, cation exchange capacity, adsorption/precipitation and subsequent mobility of heavy metals in soil, in order of importance.The metals content in the leachate's water were not formed proportional to the amount of fly-ash applied to the soil bed. Mass balance calculations indicate the amounts of Cr, Mn, Ni and Pb that can possibly leach and percolate through a fly-ash/soil bed to ground water.

show abstract

Section: Discussioncontrasting

confidence: 46%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Release and behaviour of Cr, Mn, Ni and Pb in a fly‐ash/soil/water environment: column experiment

Fulekar

Dave

1991

International Journal of Environmental Studies

View full text Add to dashboard Cite

show abstract

“…They exert their protective effects on the intestinal mucosa, possessing anti-inflammatory, adsorptive, anti-toxic and antibacterial characteristics (Klocking et al, 1992). The ability for humic acids to bond with metals motivated various authors to study their possible use for excluding undesirable metals from the gastrointestinal tracts of animals, or a decrease in their availability (Beveridge and Pickering, 1980;Marinski et al, 1982;Livens, 1991;Herzig et al, 1994;Glynn, 1995;Hudak et al, 1997;Lind and Glynn, 1999). Ridwan (1977) and Rochus (1983) observed that low concentrations of humic acids (0.1%) in feed were sufficient for a significant decrease of lead and cadmium uptake by rats.…”

mentioning

confidence: 99%

Model trial investigating retention in selected tissues using broiler chicken fed cadmium and humic acid

Herzig¹,

Navrátilová²,

Suchý³

et al. 2007

Vet. Med. - Czech

View full text Add to dashboard Cite

Forty randomly selected chickens were allocated into four groups: K, HA, Cd and Cd + HA. After a 5-day adaptation period, the experiment was initiated. Group K was fed a diet without supplements. Group HA was fed the same diet with a 0.5 g supplement of humic acid per chicken/day. Group Cd was treated with 0.147 mg Cd per chicken/day (0.3 mg of CdCl 2 ·2.5H 2 O), and Group Cd + HA was given the same treatment as the latter group, with an additional 0.5 g humic acid per chicken/day. The chickens were given the above mentioned treatment daily, for 10 days. Subsequently, they were slaughtered and samples from livers, kidneys and leg muscle (m. flexor perforans et perforatus) were collected and Cd levels determined. The Cd levels detected in Group K are commonly found in market chickens and were assumed to be base background value; these represent 32%, 5.2% and 20% of allowed maximum residual limit (MRL) in kidney, liver and muscle, respectively. The limits are 1.0; 0.5 and 0.05 mg/kg for kidney, liver and muscle, respectively. The ten-day treatment with 0.147 mg Cd/day, i.e. 1.47 mg Cd per 10 days, significantly increased Cd levels in all investigated tissues. Average levels in kidneys, livers and leg muscle were 4.99 ± 1.57, 0.558 ± 0.630 and 0.052 ± 0.008 mg Cd/kg, respectively. When cadmium chloride was given together with humic acids, (group Cd + HA), Cd levels decreased in all investigated tissues by 39.6%, 34.2% and 80.8% in kidney, liver and muscle, respectively. The average levels were 3.012 ± 1.33, 0.361 ± 0.367 and < 0.01 mg/kg in kidneys, livers and leg muscle, respectively.

show abstract

“…The interaction of humic substances with metals could play an important role in removing these hazardous substances from the environment [4,[6][7][8][9][10]. Many studies therefore focus on the interaction of heavy metals in wastewater with HSs [3][4][5][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Immobilisation of Humic Substances Using Plasma Modification

et al. 2015

View full text Add to dashboard Cite

Abstract. This paper presents a study of the immobilization of humic substances (HSs) on a polypropylene (PP) nonwoven fabric. In order to attach the HSs, the PP nonwoven fabric was modified in a volume of nonthermal atmospheric pressure dielectric barrier discharge (DBD) under defined conditions. An unmodified PP nonwoven fabric was used as a reference sample. The modified and unmodified samples were both dipped in an aqueous solution of potassium humate, and then the samples were washed in water and the amount of HSs attached to the PP fabric was monitored. An aqueous solution of cadmium salts was filtered through the treated fabric, the content of Cd 2+ in the solution was monitored using ICP-OES analysis, and the Cd 2+ sorbed on the fabric was proved by SEM/EDS analysis. The efficiency of the PP plasma modification was proved by XPS analysis, and the presence and the distribution of the HSs along the fibers was proved by SEM analysis.

show abstract

Influence of humate-solute interactions on aqueous heavy metal ion levels

Cited by 49 publications

References 20 publications

Release and behaviour of Cr, Mn, Ni and Pb in a fly‐ash/soil/water environment: column experiment

Release and behaviour of Cr, Mn, Ni and Pb in a fly‐ash/soil/water environment: column experiment

Model trial investigating retention in selected tissues using broiler chicken fed cadmium and humic acid

Immobilisation of Humic Substances Using Plasma Modification

Contact Info

Product

Resources

About