Removal of heavy metals using a plant biomass with reference to environmental control

Sekhar, K. Chandra; Kamala, C. T.; Chary, N.S.; Anjaneyulu, Y.

doi:10.1016/s0301-7516(02)00047-9

Cited by 146 publications

(22 citation statements)

References 10 publications

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“…A greater Pb capture could be attributed to its ability to form more stable compounds, compared to Zn, which is reflected in its covalent index [34][35][36]. Since the experimental protocols in the biosorption studies can vary the reported results are not always comparable in detail.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Zinc and Lead Biosorption by Delftia tsuruhatensis: A Bacterial Strain Resistant to Metals Isolated from Mine Tailings

Bautista-Hernández¹,

Ramírez-Burgos²,

Duran-Páramo³

et al. 2012

JWARP

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A bacterial strain capable of Zinc and Lead biosorption was isolated from mine tailings. This strain showed the highest minimum inhibitory concentrations (MIC) of metals among other isolates in metal-resistance tests. Sorption tests were conducted placing 0.015 g of dry biomass in 10 ml of metallic solution at fixed pH. Contact was analyzed at different times (kinetics) and different initial concentrations (isotherm). The biomass was separated by centrifugation and the concentration of non-absorbed metal was determined using atomic absorption spectroscopy. The strain was identified by 16S sequencing as Delftia tsuruhatensis. The order of toxicity of the metals to the bacterium was Zn > Pb > Se > Ni > Cu = Al. Zinc and Lead absorption kinetics were adjusted to the pseudo second order equation (r 2 = 0.99), showing that equilibrium was reached at 40 and 20 min, respectively. Maximal absorption of Pb and Zn was 0.216 and 0.207 mmol·g -1 , respectively; which can be considered a median magnitude capacity when compared to other biosorbents described in the literature.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Zinc and Lead Biosorption by Delftia tsuruhatensis: A Bacterial Strain Resistant to Metals Isolated from Mine Tailings

Bautista-Hernández¹,

Ramírez-Burgos²,

Duran-Páramo³

et al. 2012

JWARP

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“…Beyond 50 min, the % biosorption is constant indicating the attainment of equilibrium conditions. The maximum biosorption of 79.45% (1.589 mg/g ) is attained for 50 min of agitation time with 10 g/L of 53 μm size biosorbent mixed in 50 mL of aqueous solution (C 0 =20 mg/L) [10,11].…”

Section: Effect Of Agitation Timementioning

confidence: 99%

Process Optimization and Biosorption of Lead Using Albizia Saman Leaf Powder

Rao¹

2012

iosrphr

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Water pollution is one of the signs that humans have exceeded the limits and causing health problems for living beings on earth. The present paper comprises the optimization and biosorption of lead from aqueous solution using Albizia saman leaf powder as biosorbent. Single Step Optimization was considered for preliminary runs with the variables agitation time, biosorbent size, pH of the solution, initial concentration of the aqueous solution, dosage of biosorbent and temperature. The Central Composite Design (CCD) was used for final runs optimization using Response Surface Methodology (RSM). Results indicated that the optimum agitation time for biosorption of lead is 50 min. The increase in mass of biosorbent lead to increase in lead (pb) ion biosorption due to the increase in the number of active biosorption sites. Maximum percentage biosorption is observed at a pH of 6 and with particle size of 53 µm. Experimental data were better described by pseudosecond-order model. The adsorption isotherm could be well fitted by the Langmuir equation followed by Freundlich and Temkin. Over and all, Albizia Saman leaf powder can be used as an effective natural biosorbent for the economic treatment of aqueous solutions containing lead.

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“…Phytoremediation is the technology of using plants to reduce or remove contaminants from the environment and accumulating them within the plant. 5,6 Not all plants can be used as phytoremediation agents because not all of them have the required defense mechanisms against contaminants, or the ability to accumulate contaminants in less toxic forms. At present, only 450 Angiosperms are known to be heavy metal hyperaccumulators.…”

Section: Introductionmentioning

confidence: 99%

Phytoremediation of Chromium: Distribution and Speciation of Chromium in Typha angustifolia

Vidayanti

Choesin

Iriawati

2017

IJPB

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Chromium (Cr), especially in hexavalent chromium [Cr(VI)] may contaminate water or soil and cause detrimental effects, as it is potentially carcinogenic and teratogenic. Phytoremediation using plants such as Typha angustifolia provides an alternative approach for handling Cr waste. The objective of this study was to determine the mechanism of Cr accumulation in T. angustifolia. Hydroponic media containing T. angustifolia was added with 0, 1, 5, 10 and 20 ppm of Cr (VI) (K 2 Cr 2 O 7 ). After 15 days of treatment, distribution and speciation of Cr in roots and shoots of T. angustifolia were analyzed using XAS and µ-XRF. Results showed that Cr was detected in almost all parts of root and shoot at different intensities. Intensities of Cr was higher in roots (especially in the vascular bundle) than in shoot. Cr speciation in the root and shoot was found as trivalent chromium [Cr(III)] which formed as a result of Cr(VI) reduction. Based on the patterns of Cr distribution and speciation, results of this study suggest that T. angustifolia in this study does not reduce Cr(VI) to become Cr(III) inside the plants.

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Removal of heavy metals using a plant biomass with reference to environmental control

Cited by 146 publications

References 10 publications

Zinc and Lead Biosorption by Delftia tsuruhatensis: A Bacterial Strain Resistant to Metals Isolated from Mine Tailings

Zinc and Lead Biosorption by Delftia tsuruhatensis: A Bacterial Strain Resistant to Metals Isolated from Mine Tailings

Process Optimization and Biosorption of Lead Using Albizia Saman Leaf Powder

Phytoremediation of Chromium: Distribution and Speciation of Chromium in Typha angustifolia

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