Experimental binding of lead to a low cost on biosorbent: Nopal (Opuntia streptacantha)

Miretzky, Patricia; Muñoz, Carolina; Carrillo-Chávez, Alejandro

doi:10.1016/j.biortech.2007.02.045

Cited by 75 publications

(47 citation statements)

References 24 publications

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“…as coagulant in water treatment has been reported by some authors [10,13]. Besides, [14] have reported the use of Opuntia streptacantha as a low cost biosorbent for lead in water treatment.…”

Section: Introductionmentioning

confidence: 89%

Use of Prosopis laevigata Seed Gum and Opuntia ficus-indica Mucilage for the Treatment of Municipal Wastewaters by Coagulation-Flocculation

Torres¹,

Carpinteyro-Urbán²

2012

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Prosopis laevigata and Opuntia ficus-indica grow in arid and semiarid regions of Mexico and other countries. Both produce biopolymers with interesting characteristics from the rheological point of view as well as because of their coagulating-flocculating capabilities. Prosopis produce galactomannans inside the endosperm, very similar to those found in guar, locust bean, and tara gums. Opuntia sp. produces mucilage that contains polygalacturonic acid and five neutral sugars. Prosopis seed gum has not been proposed to be used as coagulant-flocculant before. In the case of Opuntia mucilage, some authors have suggested its use in the treatment of waters, using either the mucilage or the whole cladode powder. The use of these products in the treatment of municipal or even industrial wastewaters could give rise to diverse benefits. From the environmental point of view, treated waters with neither Fe nor Al, nor synthetic polymers would be obtained (with less toxicity risk). Besides, the produced sludges would be smaller in amount, with better biodegradability, and lower metals content. From the economical point of view, the use of these biopolymers would give an added value to the Opuntia and Prosopis culture in Mexico, helping small communities to enhance their incomes by producing environmental-friendly products. This work shows that both Prosopis galactomannan and Opuntia mucilage can be used to treat municipal wastewaters with an initial organic charge of about 827 mg/L as COD by the coagulation-flocculation process, with COD removals for the mesquite seed gum of up to 90% (pH 10, dose of 75 mg/L) and of 60% (pH 7, doses of 50 and 150 mg/L). In the case of mucilage, 65% of the initial COD was removed at pH 10 (dose of 50 mg/L). These figures are very promising for the treatment of wastewaters, with environmental-friendly products.

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Section: Introductionmentioning

confidence: 89%

Use of Prosopis laevigata Seed Gum and Opuntia ficus-indica Mucilage for the Treatment of Municipal Wastewaters by Coagulation-Flocculation

Torres¹,

Carpinteyro-Urbán²

2012

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“…Since 1/b represents the equilibrium concentration C e when Q e = Q max /2, the larger the b value, the higher the affinity of the alkalinetreated diatomite with respect to Cd 2? (Miretzky et al 2008). …”

Section: Effect Of Initial Solution Phmentioning

confidence: 99%

Cd2+ adsorption on alkaline-pretreated diatomaceous earth: equilibrium and thermodynamic studies

2009

Self Cite

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Naturally occurring diatomaceous earth was modified by alkaline pretreatment, and its effectiveness for Cd 2? removal from contaminated water was investigated. Batch experiments were carried out to determine Cd 2? adsorption capacity and the efficiency of the sorption process under different experimental conditions. Experimental data showed good fitting to Langmuir and Freundlich isotherms models. The Cd 2? maximum adsorption capacity was 0.058 mmol g -1 for raw diatomite and increased to 0.195 mmol g -1 for alkaline-pretreated diatomite with efficiency higher than 96% (diatomite dose 2.5 g L -1 , pH 6). Adsorption of Cd 2? to alkaline-pretreated diatomite increased as the temperature increased. Thermodynamic parameters were calculated to evaluate the feasibility of the adsorption process at different temperatures. The adsorption process was spontaneous and endothermic. The interaction between Cd 2? ions and diatomite surface was weak enough to be considered as physical sorption, confirmed by the low value of activation energy.

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“…Eventually the uptake of metal ions is limited by the occupied binding sites and results in a plateau. It showed that the active sites of the adsorbent remaining constant, the adsorption are independent of the concentration of metal ions at high concentration of metal ions [27] [28]. The maximum adsorption capacities from the experimental results are 91.68 and 71.2 mg/g for Pb(II) and Cu(II), respectively.…”

Section: Adsorption Isothermmentioning

confidence: 67%

Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves

Shrestha¹,

Kour²,

Ghimire³

2016

ACES

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In this study adsorptive removal of Pb(II) and Cu(II) from aqueous solution by using environmental friendly natural polymers present in exhausted tea leaves has been studied. The biosorbent was modified with dimethylamine to introduce N-functional groups on the surface of adsorbent. The modified adsorbent was characterized by elemental analysis, zeta potential analysis, SEM, DRFTIR, XRD and TG/DTA analysis to conform the modification. Adsorption capacity of the adsorbent was determined as the function of pH of the solution, initial concentration of the solution and contact time. The adsorption experiments were performed using batch experiments. The maximum adsorption capacities of the adsorbent were found to be 91.68 and 71.20 mg/g for Pb(II) and Cu(II), respectively. To minimize the process cost, regeneration of the biosorbent and recovery of metal ions was explored by desorption study. The results indicate that the adsorbent holds great potential for the sequestration of Pb(II) and Cu(II) from their aqueous solution. Hence the modified exhausted tea leaves (MTL) have been investigated as a new cost effective and efficient biosorbent for removal of Pb(II) and Cu(II) from their aqueous solution.

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Experimental binding of lead to a low cost on biosorbent: Nopal (Opuntia streptacantha)

Cited by 75 publications

References 24 publications

Use of Prosopis laevigata Seed Gum and Opuntia ficus-indica Mucilage for the Treatment of Municipal Wastewaters by Coagulation-Flocculation

Use of Prosopis laevigata Seed Gum and Opuntia ficus-indica Mucilage for the Treatment of Municipal Wastewaters by Coagulation-Flocculation

Cd2+ adsorption on alkaline-pretreated diatomaceous earth: equilibrium and thermodynamic studies

Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves

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