Adsorption of Cd2+ and Pb2+ onto coconut shell biochar and biochar-mixed soil

Paranavithana, G. N.; Kawamoto, Ken; Inoue, Yohtaro; Saito, Takeshi; Vithanage, Meththika; Kalpage, C. S.; Herath, Gemunu

doi:10.1007/s12665-015-5167-z

Cited by 70 publications

(26 citation statements)

References 39 publications

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“…Thus, the effects of rice husk carbon on soil adsorbing NH 4 + -N in biogas slurry were worse than that of nut shell carbon (Figures 4 and 5). The findings were actually supported by the characterization of rice husk carbon and nut shell carbon (Table 1, Figures 1 and 2) and other studies on rice husk carbon conducted by Kizito et al [62,[66][67][68]. In their studies, the adsorption capacity of rice husk carbon was worse than that of coconut shell carbon, straw carbon, and charcoal because the ash content of rice husk carbon was relatively high.…”

Section: Effects Of Biochars On Different Soils Adsorbingsupporting

confidence: 65%

Effects of Three Biochars as Adsorbents on Soils Adsorbing Ammonium Nitrogen in Biogas Slurry

Wang

et al. 2017

Journal of Chemistry

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The increasing concern of biogas slurry disposal and nitrogen loss in soils has brought back the interest in using biochar as an adsorbent of biogas slurry in soils. Three types of biochars, commercial activated carbon, pyrolysis productions derived from rice husk, and nut shell, were added as adsorbents in two types of soils (sandy and loamy) at solid weight ratio of 5%, 10%, 15%, and 20% to investigate the effects of biochars on soils adsorbing ammonium nitrogen (NH 4 + -N) in biogas slurry using oscillation method. There was no difference of NH 4 + -N adsorbability for sand soil and loamy soil. The NH 4 + -N adsorption capacity of soils increased as the additive biochars increased from 0 to 20%. The smaller particle size of biochars led to the shorter stable adsorption time and the better NH 4 + -N adsorption capacity. Commercial activated carbon showed the best NH 4 + -N adsorption capacity in biogas slurry, followed by the nut shell carbon. The rice husk carbon was the worst. The results in this study provide a feasible and cost-effective assessment method of biochars for increasing the NH 4 + -N adsorption capacity of soils in biogas slurry, as well as good insight into effects of different biochars on improving NH 4 + -N adsorption capacity of soils.

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Section: Effects Of Biochars On Different Soils Adsorbingsupporting

confidence: 65%

Effects of Three Biochars as Adsorbents on Soils Adsorbing Ammonium Nitrogen in Biogas Slurry

Wang

et al. 2017

Journal of Chemistry

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“…As shown in the Table 1, CDW [8][9][10][11][12][13][14][15][16], geo- [17][18][19][20][21][22] and biosorbents [23][24][25][26][27][28][29][30], major target metals including Cu, Cd (39.9%), Pb (33.3%), and Zn (24%) were studied, while less consideration was given to metals like As (12.1%), Cr, Hg, and Mn (6.1%). The particle sizes used varied for each category and metal type in reviewed papers.…”

Section: Resultsmentioning

confidence: 99%

Reviews on the Applicability of Construction and Demolition Waste as Low-Cost Adsorbents to Remove-Heavy Metals in Wastewater

Kumara

Saito

Asamoto

et al. 2018

GEOMATE

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Removal of heavy metals from wastewater is of special concern due to the persistence of heavy metals in the environment. The industrial discharge of heavy metals adversely affects soil and water resources, aquatic organisms, and ecosystem integrity. In addition, high concentrations of heavy metals are detected in solid waste landfill leachate in many developing countries due to non-segregated waste dumping. At present, various kinds of adsorbents such as activated carbon, biomass resources, geomaterials, and industrial waste products are used to treat heavy metal-contaminated water. However, the use of construction and demolition waste (CDW) and its recycled materials to treat heavy metal-contaminated water has not been fully examined. Because the generation of CDW is increasing due to rapid urbanization and a high demand for construction, the wise use of CDW and its recycled materials is necessary. This paper reviews journal articles published from 2004 to 2016 that studied the applicability of low-cost CDW adsorbents to remove heavy metals from wastewater. In particular, it summarizes results on using CDW and recycled materials such as cement, concrete, and brick compared to those from various other adsorbents such as biosorbents, geomaterials, and their industrial products. The potential applicability of CDW and its recycled materials as heavy-metal adsorbents was examined based on a comparison table listing material properties, test conditions, and measured adsorption properties.

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“…Freundlich equations had also provided better adjustments for Pb adsorption by 4 soils from Goiás state (0.96 < R 2 < 0.99) (Oliveira et al, 2010) and by a transported soil from Ribeira Valley (R 2 = 0,98) studied by Araujo (2015). Paranavithana et al (2016), observed that the Langmiur isotherm presented the best fit for Pb 2+ and Cd 2+ in coconut shell biochar (fine granules), in a local soil from Sri Lanka, and in a biochar-mixed soil (1:1 mixture of biochar and soil).…”

Section: Comentioning

confidence: 99%

Adsorption of lead (Pb) in strongly weathered tropical soil (Ribeira Valley region - Brazil)

et al. 2019

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Lateritic soils have been widely used in the construction of landfill base liners for municipal and industrial waste. On the other hand, there is little practice in the use of strongly weathered residual soils for this finality. The use of local soil for the construction of liners in order to waterproof and retain contaminants represents an alternative to control this type of contamination. Thus, the objective of this study was to determine the physical and chemical properties of a strongly weathered tropical soil (residual soil) collected in the city of Eldorado Paulista (Ribeira Valley), and to evaluate the abilityof this soil to adsorb lead (Pb). The contamination of soil and water by Pb due to inadequate mining waste disposal is common in this region. The Pb was adsorbed by the residual soil, mainly at the lowest initial concentrations. When the initial concentration of 20 mg L-1 was used, the adsorption percentage of Pb was 92.5% and when the initial concentration was 100 mg L-1, the adsorption rate was 81.7%. In addition to the retention of Pb, this soil presented the following characteristics which are favorable for using soils in the construction of liners: fine granulometry, liquid limit (LL) of 57%, plasticity index (PI) of 33%, oxidizing medium and the predominance of negative charges on the surface of the colloidal particles. Thus, it is concluded that the weathered tropical residual soil exhibits characteristics that allow it to be used as a liner in the disposal of residues containing Pb.

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Adsorption of Cd2+ and Pb2+ onto coconut shell biochar and biochar-mixed soil

Cited by 70 publications

References 39 publications

Effects of Three Biochars as Adsorbents on Soils Adsorbing Ammonium Nitrogen in Biogas Slurry

Effects of Three Biochars as Adsorbents on Soils Adsorbing Ammonium Nitrogen in Biogas Slurry

Reviews on the Applicability of Construction and Demolition Waste as Low-Cost Adsorbents to Remove-Heavy Metals in Wastewater

Adsorption of lead (Pb) in strongly weathered tropical soil (Ribeira Valley region - Brazil)

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