Sawdust—A green and economical sorbent for the removal of cadmium (II) ions

Memon, Saima Q.; Memon, Najma; Shah, S.W.; Khuhawar, Muhammad Yar; Bhanger, M. I.

doi:10.1016/j.jhazmat.2006.06.013

Cited by 136 publications

(58 citation statements)

References 16 publications

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“…Of course improved sorption capacity may compensate the cost of additional processing. Recently, application of a number of low-cost biomaterials such as lignin (Demirbas 2004), coconut husk (Hasany and Ahmad 2006), rice husk (Upendra and Manas 2006), tree fern (Ho and Wang 2004), and sawdust (Memon et al 2007) have been reported for the removal of cadmium from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Coconut Bagasse Treated by Thiourea/Amonium Solution for Cadmium Removal: Kinetic and Adsorption Equilibrium

Neto¹,

Carvalho²,

Honorato³

et al. 2012

BioResources

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Coconut bagasse, an agricultural solid waste was used as biosorbent for the removal of cadmium after modification with thiourea. The adsorption of Cd 2+ was studied at pH 5.5. Langmuir, Freundlich, and Temkin isotherms were used to model the adsorption equilibrium data, and it was found that the system followed the Langmuir and Temkin isotherms. The adsorption capacity of the biosorbent was found to be 35.97 mg g -1 , which is higher or comparable to the adsorption capacity of various adsorbents reported in literature. Kinetic studies showed that the adsorption followed a pseudo-second-order rate model.

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Section: Introductionmentioning

confidence: 99%

Coconut Bagasse Treated by Thiourea/Amonium Solution for Cadmium Removal: Kinetic and Adsorption Equilibrium

Neto¹,

Carvalho²,

Honorato³

et al. 2012

BioResources

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“…In acid soils, Cd is easily exchanged and available to plants, whereas, as pH increases, Cd retention is favored by sorption on variable charge compounds, by inner-sphere complexes formation, and by hydroxide precipitation [56,57]. In this way, Memon et al [58] obtained maximum Cd adsorption on sawdust at pH > 4 because at those pH carboxyl groups are deprotonated and negatively charged, being able to electrostatically bind Cd (which at those pH, and up to pH 8, is found as Cd 2+ ), while at pH > 9 adsorption decreases due to hydrolysis of the metal, appearing CdOH + , with lower affinity for sorbent surfaces. At pH < 3, variable charge surfaces tend to be positively charged, decreasing adsorption of cationic metals.…”

Section: Sorption On the Individual Materialsmentioning

confidence: 99%

“…When the dominant mechanism is the electrostatic attraction between the surface of the negatively charged bio-sorbent and Cd 2+ , an exchange with H + can take place, decreasing solution pH [61]. According to Memon et al [58], the ion exchange mechanism could be the most frequent in Cd adsorption on organic materials (such as the hemp waste and pine bark in the present study), since its cell walls are formed by cellulose and lignin, with many hydroxyl groups present in tannins and other phenols (see Supplementary Material), which are active ion exchangers. However, Taty-Costodes et al [61] and Pagnanelli et al [62], also indicate the presence of mechanisms other than cation exchange, such as specific adsorption and complexation processes, as well as physical adsorption, and probable micro-precipitations, which would explain the differences found in the present study in relation to pH change, since these processes do not imply H + release.…”

Section: Sorption On the Individual Materialsmentioning

confidence: 99%

Cadmium and Lead Sorption/Desorption on Non-Amended and By-Product-Amended Soil Samples and Pyritic Material

Núñez‐Delgado

Romar-Gasalla

Santás-Miguel

et al. 2017

Water

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Batch-type experiments were used to study cadmium (Cd) and lead (Pb) sorption/desorption on forest soil, vineyard soil and pyritic material samples, on the by-products mussel shell, oak ash, pine bark and hemp waste, and on forest soil, vineyard soil and pyritic material amended with 48 t ha −1 of oak ash, mussel shell, and hemp waste. The main results were that the forest soil showed higher Cd and Pb retention than the vineyard soil and the pyritic material. Regarding the byproducts, sorption was in the following order: oak ash > mussel shell > hemp waste > pine bark, with desorption following an inverse sequence. The pH was the parameter that most influenced Cd and Pb sorption. Cd and Pb sorption curves showed better fitting to the Freundlich than to the Langmuir model, indicating the dominance of multilayer interactions. Oak ash and mussel shell were the amendments causing higher increase in Cd and Pb sorption on both soils and the pyritic material (close to 100% with the oak ash amendment), as well as more a pronounced decrease in desorption. These results could be used to favor an effective management of the by-products studied, which could retain Cd and Pb in soils and degraded areas, preventing water pollution.

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“…국내에서는 일부 연구자들이 알긴산, 해조류, 미역 폐기물, 폐 폐니실리움 균주, 중금속 내성 미생 물 등을 이용하여 폐수의 중금속 흡착특성을 연구하였으나 식물 바이오매스(biomass)를 대상으로 한 생물흡착에 대한 연구는 상대적으로 부족한 실정이다 1,3,12,13,14,22) . Table 1) 15,16) . 왕겨(RH)의 경우에는 0.1 M NaOH 용액을 이용하여 고액 비율을 1:20 으로 조절하고 20℃에서 2시간 동안 반응시킨 후 증류수로 반복 세척하였다 17) .…”

Section: 서 론unclassified

Adsorption Characteristics of Heavy Metal Ions onto Chemically Modified Rice Husk and Sawdust from Aqueous Solutions

Lee¹,

Jeon²,

Lim³

et al. 2009

Korean Journal of Environmental Agriculture

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Biosorption uses adsorbents derived from non-living biomass and removes toxic metals from industrial wastewater. The objective of this research was to evaluate the potential of low cost biosorbents to remove heavy metal ions (Cd, Cu, Pb and Zn) from aqueous solutions using chemically modified rice husk and saw dust (Pseudotsuga menziesi, Quercus, Populus). Batch-type adsorption experiments were carried out using rice husk and saw dust treated with NaOH and/or tartaric acid in artificial wastewater (100 mg metal/L). The experimental results showed that the adsorption specificity of each biosorbent was Pb > Cu > Cd > Zn irrespective of the types of biosorbents. The adsorption capacity of Pb and Cu onto NaOH-treated sawdust was increased 2~3 times compared to the untreated one. In addition, the tartaric acid treatment increased the adsorption capacity of rice husk for Zn and Cd approximately 5~10 fold compared to the untreated one. Surface conditions and changes in functional groups by chemical modification of each biosorbent were confirmed by SEM and FT-IR. Overall, the results show that chemical modification increases the metal removal capacity of rice bran and sawdust.

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Sawdust—A green and economical sorbent for the removal of cadmium (II) ions

Cited by 136 publications

References 16 publications

Coconut Bagasse Treated by Thiourea/Amonium Solution for Cadmium Removal: Kinetic and Adsorption Equilibrium

Coconut Bagasse Treated by Thiourea/Amonium Solution for Cadmium Removal: Kinetic and Adsorption Equilibrium

Cadmium and Lead Sorption/Desorption on Non-Amended and By-Product-Amended Soil Samples and Pyritic Material

Adsorption Characteristics of Heavy Metal Ions onto Chemically Modified Rice Husk and Sawdust from Aqueous Solutions

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