Humic substances from sewage sludge compost as washing agent effectively remove Cu and Cd from soil

Kulikowska, Dorota; Gusiatin, Zygmunt M.; Bułkowska, Katarzyna; Kierklo, Katarzyna

doi:10.1016/j.chemosphere.2015.03.083

Cited by 139 publications

(41 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Meanwhile, fulvic acid readily forms soluble complexes, which will increase the bioavailability of heavy metals [67]. The rational use of organic complexing agents can effectively reduce the environmental risk of free heavy metals ions [68][69][70].…”

Section: Om In Soilmentioning

confidence: 99%

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

2017

View full text Add to dashboard Cite

Abstract:The safe disposal of sewage sludge during the process of municipal wastewater treatment has become one of the major concerns of increased production. Land application was thought of as a more economical method for sewage sludge disposal than landfill and incineration. However, the presence of heavy metals in sewage sludge restricted the use of land application. The environmental risk of heavy metals was dependent on their contents, chemical speciations, and soil characteristics. Composting and chemical immobilization were the commonly used methods to immobilize the heavy metals in sewage sludge. The immobilization mechanism and speciation transformation of heavy metals during the composting process were presented. Aluminosilicate, phosphorus-bearing materials, basic compounds, and sulfides were reviewed as the commonly used chemical immobilizing agents. The problems that occur during the immobilization process were also discussed. The combination of different methods and the modification of chemical immobilizing agents both improved the fixation effect on heavy metals.

show abstract

Section: Om In Soilmentioning

confidence: 99%

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

2017

View full text Add to dashboard Cite

show abstract

“…10 In particular, it is well known that heavy metals, such as Cu 2+ and Pb 2+ , form complexes with humic substances. [11][12][13][14][15][16] The solubility of humic substances could be influenced by the ionic strength and the presence of multivalent cations. 10 Under conditions of higher ionic strength, such as in seawater, the electric charge on humic substances is partially neutralized, which results in a decreased solubility.…”

mentioning

confidence: 99%

Removal of Trace Levels of Cu(II) from Seawater by Co-precipitation with Humic Acids

Iwai

2017

ANAL. SCI.

View full text Add to dashboard Cite

To maintain performance related to fuel consumption and maneuverability, the bottom of ships are painted with antifouling paint that contains Cu2O as a biocidal pigment. However, in enclosed coastal areas around dockyards, some of the Cu(II) contained in the paint is eluted into the surrounding water. The present study examined the removal of Cu from seawater by co-precipitation with humic acids (HAs). After precipitating the HA in seawater, the amount of Cu(II) in the supernatant was colorimetrically measured by a colorimetry using bathocuproine. The removal efficiency (RE%) for micromolar Cu(II) increased with increasing initial concentrations of HAs. An RE of 90% was obtained using an HA derived from hardwood bark compost. Aromatic components in the HA that contained highly substituted acidic functional groups appeared to enhance the removal of Cu(II). The findings reported herein indicate that HAs represent a useful material for removing trace levels of Cu from seawater.

show abstract

“…At pH 3, Cd removal efficiency was low, possibly because of reduced solubility of humic substances, and their partial precipitation onto soil (clay) particles. At low pH, the carboxylic groups of humic substances would also be less dissociated, while the humic substances molecules become more compact (Lamar et al, 2014;Kulikowska et al, 2015a). As a result, electrostatic interaction between humic substances and soil particles would increase as does humic substance precipitation/adsorption onto soil particles as Wang and Mulligan (2009) had observed for arsenic.…”

Section: Effect Of Liquid-solid Ratio On CD Removal Efficiencymentioning

confidence: 99%

“…As a result, electrostatic interaction between humic substances and soil particles would increase as does humic substance precipitation/adsorption onto soil particles as Wang and Mulligan (2009) had observed for arsenic. Adsorption of humic substances onto soils is a common phenomenon (Simmler et al, 2013;Kulikowska et al, 2015a). At pH > 7, Cd removal efficiency decreased as Cd tends to form hydroxides and precipitate, making it more resistant to washing with humic substances.…”

Section: Effect Of Liquid-solid Ratio On CD Removal Efficiencymentioning

confidence: 99%

“…Humic substances can bind heavy metals by forming surface complexes with carboxyl and phenolic hydroxyl groups (Conte et al, 2005). Humic substances can be extracted from a variety of materials, such as leonardite and sewage sludge (Kulikowska et al, 2015a). Since leonardite may be likened as ancient biochar, the humic substances extracted from this source may be likened to a surface-activated biochar (Meng et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Humic substances as a washing agent for Cd-contaminated soils

et al. 2017

View full text Add to dashboard Cite

Humic substances from sewage sludge compost as washing agent effectively remove Cu and Cd from soil

Cited by 139 publications

References 31 publications

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Removal of Trace Levels of Cu(II) from Seawater by Co-precipitation with Humic Acids

Humic substances as a washing agent for Cd-contaminated soils

Contact Info

Product

Resources

About