Removal of Pb(II) from aqueous solution using carbon derived from agricultural wastes

Ayyappan, R.; Sophia, A. Carmalin; Swaminathan, K.; Sandhya, S.

doi:10.1016/j.procbio.2004.05.007

Cited by 137 publications

(63 citation statements)

References 14 publications

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“…The adsorption of all target metal ions by macadamia nut shells (MNS), rice husks (RH), Moringa oleifera husks (MH) and marula stones (AML) increased as initial pH increased from 4 to 6 (Tables 1, 2 and 3). The trend is consistent with the results obtained for the adsorption of Pb(II) using activated carbon prepared from various agricultural wastes (Ayyappan et al, 2005), for the adsorption of heavy metal ions using activated carbon prepared from apricot stone (Kobya et al, 2005) and for the adsorption of nickel by activated carbon prepared from almond husk (Hasar, 2003). For all the carbons used in this study, maximum metal ion adsorption was observed at pH 6 (Table 3) and on raising the pH above 6, precipitation occurred.…”

Section: Effect Of Ph On Adsorption Of Metal Ionssupporting

confidence: 90%

“…In adsorption of nickel by activated carbon prepared from almond husks, Hasar (2003) established that at 50 min, equilibrium had been attained. Apparently, the adsorption of most metal ions by activated carbon generally reaches equilibrium within 120 min (Ayyappan et al, 2005;Yu et al, 2001;Hasar, 2003). When BBB was used to adsorb Pb(II) from a solution containing Pb(II) only, percentage adsorption of Pb(II) was higher than the values obtained when Pb(II) was adsorbed from a mixture of metal ions (Figure 3).…”

Section: Effect Of Contact Time On Adsorption Of Metal Ionsmentioning

confidence: 93%

“…For all the carbons used in this study, maximum metal ion adsorption was observed at pH 6 (Table 3) and on raising the pH above 6, precipitation occurred. The removal of metals from solution is dependent on the pH of the solution, which affects the surface charge of adsorbents, the degree of ionization and the species of adsorbate (Ayyappan et al, 2005;Karagoz et al, 2008;Dermibas et al, 2008). The increase in metal removal as pH increased can be attributed to the decrease in competition between H + ions and positively charged metal ions at the surface sites of the activated carbon (Hasar, 2003).…”

Section: Effect Of Ph On Adsorption Of Metal Ionsmentioning

confidence: 99%

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Adsorption of heavy metals by agroforestry waste derived activated carbons applied to aqueous solutions

Misihairabgwi¹,

Kasiyamhuru²,

Anderson³

et al. 2014

Afr. J. Biotechnol.

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Activated carbons prepared from macadamia nut shells, baobab shells, pigeon pea husks, rice husks, Moringa oleifera husks, and marula stones were investigated for their abilities to adsorb Pb(II), Zn(II), Cu(II), Ni(II), Fe(II), Mn(II), Hg(II), Cr(III), As(III) and Cd(II) from aqueous solutions. Batch adsorption experiments were conducted at pH values of 4, 5 and 6. Metal ion adsorption generally increased as the pH was increased from 4 to 6. Percentage adsorption values were above 60% for adsorption of Hg(II) by all the activated carbons at pH 6. The adsorption of Pb(II) by carbons from Baobab shells, pigeon pea husks, Moringa oleifera husks and Marula stones was at least 22% higher than that of the commercial carbons used for comparison. Carbons derived from pigeon pea husks and baobab shells showed better metal ion adsorption compared to the other carbons and were used to determine the effects of initial metal concentration, contact time and adsorbent quantity on metal adsorption. The metal ion adsorption data fitted the Langmuir adsorption model.

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Section: Effect Of Ph On Adsorption Of Metal Ionssupporting

confidence: 90%

Section: Effect Of Contact Time On Adsorption Of Metal Ionsmentioning

confidence: 93%

Section: Effect Of Ph On Adsorption Of Metal Ionsmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of heavy metals by agroforestry waste derived activated carbons applied to aqueous solutions

Misihairabgwi¹,

Kasiyamhuru²,

Anderson³

et al. 2014

Afr. J. Biotechnol.

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“…But the metal ion adsorbate per unit mass of adsorbent (mg/g) increases with the concentration of synthetic wastewater. The uptake of metal ion at higher concentrations is due to an increase in the driving force of concentration gradient [66][67][68] . This is observed from the Fig.-4 that the removal efficiency of copper is recorded30.09 % at the concentration 10 mg/L and then decreases very smoothly to 11.8 % under the concentration 50 mg/L, pH 3.5 and contact time 25 minutes.…”

Section: Effect Of Concentration Of Metallic Wastewatermentioning

confidence: 99%

"BIOSORPTION OF COPPER (II) ON TO THE WASTE LEAVES OF KAFAL (Myrica esculenta) "

2018

RJC

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The commonly used removal processes for heavy metals from contaminated wastewater and cited in the literature are chemical precipitation, electrowinning, carbon adsorption, reverse osmosis, preconcentrations, biosorption, phytoremediation etc. Among these, biosorption is comparatively efficient, low cost, economical and reliable process. Actually, the reliability of the process is depending on the choice of local biosorbents and their abundant availability. The waste plant leaves of Kafal were collected from the region of Kumaun hills of India. The paper explains that the Kafal leaf powder is a good biosorbent for the removal of Cu (II) ions from contaminated wastewater under batch study. The experimental data indicate that high removal efficiency is obtained at optimized conditions viz. higher pH, lower metal ion concentrations, moderate higher temperatures and higher dosage of biosorbents. The biosorption efficiency is recorded 88.98% at pH 6, 48.99% at contact time 70 minutes and 40.01 % at a higher dosage of biosorbent. The regression value is indicating that the order for all used isotherms model is Langmuir> Freundlich > Temkin.

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“…Efforts have been made to develop low cost adsorbents for the removal of heavy metals from aqueous solutions. A number of natural and synthetic adsorbents like agricultural waste's carbon [2], clay [3], neem leaves [4], cooked tea dust [5], zeolites [6], teak leaves activated carbon [7], cashew nut shell activated carbon [8], fly ash [9] etc., have been studied by various researchers for the removal of heavy metals [10].…”

Section: Introductionmentioning

confidence: 99%

Chromium Detoxification by Using Mango (Mangifera indica) and Neem (Azadirachta indica) Leaves

Shahin¹,

D²,

R³

et al. 2017

J Bioremediat Biodegrad

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Water is one of the most vital natural resource, and is crucial for survival of all living organism. One of the major polluting sources of this water is the industrial effluents. In developing countries, most of the industries are operated in small and medium scales and some of these like electroplating and tannery industries discharge waste which is rich with Cr (VI) salts. Such untreated effluents have raised several ecological concerns. Chromium has been considered as one of the most toxic pollutant primarily because of its carcinogenic and teratogenic nature. The present work was focused on investigation into suitable biological remediation of such effluents without subsequent secondary pollution. It involved effect of concentration, contact time and pH variation on ability of the neem and mango leaves in removing chromium ions form aqueous solution. The dried leaves were washed with deionised water, air-dried and ground using ball mill. The leaf powders were added to 10 ppm stock metal ion solution made from potassium dichromate where chromium exist as Cr (VI). These mixtures were shaken at a constant rate of 150 rpm, filtered and analyzed by Atomic Absorption Spectrophotometer. The maximum adsorption was obtained at pH 5.5, agitation rate of 150 rpm, particle size, of ground dry leaves, was 5 mm, initial concentration of Cr (VI) ions of 10 mg/l and contact time 24 hrs to 48 hrs. The maximum adsorption capacity was found to be 10 ppm Cr (VI) ion concentration and 5.0 g/L of mango leaf powder (MLP) at pH 5.5. However, pH 7.0 was chosen as the optimum pH (to prevent secondary pollution due to acidic pH of treated effluent). Better adsorption did not occur at higher solution temperatures. The neem leaf powder was less effective in removing Cr(VI) ions from solutions. The adsorption mechanism followed a pseudo second order kinetics.

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Removal of Pb(II) from aqueous solution using carbon derived from agricultural wastes

Cited by 137 publications

References 14 publications

Adsorption of heavy metals by agroforestry waste derived activated carbons applied to aqueous solutions

Adsorption of heavy metals by agroforestry waste derived activated carbons applied to aqueous solutions

"BIOSORPTION OF COPPER (II) ON TO THE WASTE LEAVES OF KAFAL (Myrica esculenta) "

Chromium Detoxification by Using Mango (Mangifera indica) and Neem (Azadirachta indica) Leaves

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