BIOSORPTION OF CD, CR, MN, AND PB FROM AQUEOUS SOLUTIONS BY Bacillus SP STRAINS ISOLATED FROM INDUSTRIAL WASTE ACTIVATE SLUDGE

Garcı́a, Rocı́o; Campos, J.; Cruz, Javier; Calderón, María Elena; Raynal, María Elena; Buitrón, Germán

doi:10.1016/j.recqb.2016.02.001

Cited by 52 publications

(24 citation statements)

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“…The discharge of heavy metals through various man-made activities, for example excessive application of chemical fertilizers, wood burning, coal combustion, vehicle exhaust, mining, smelting and incineration [2], has caused a wide spread disruption of the normal biogeochemical cycles of metals causing a larger accumulation of heavy metals in the environment, especially the soil [6][7][8]. The major heavy metals of concern include lead, cadmium, arsenic, mercury, copper and chromium because of their toxic impact on human health; for instance, environmental exposure to high concentrations of heavy metals has been linked with various cancers and kidney issues [9]. Heavy metals have also greatly affected soil microorganisms and plants growth and development [10].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of heavy metals in the environment has been a source of concern over the past few decades due to their persistence, potential harm and toxicological hazards [2]. Besides the fact that they are non-biodegradable, they may also undergo microbial or chemical transformation [8,9,11,12]. Recently, Hasani et al [13] and Nath et al [3] reported that heavy metal polluted environments activate co-selection process and cause a decrease in microbial tolerance to antibiotics due to their ability to co-regulate genes responsible for antibiotic resistance.…”

Section: Introductionmentioning

confidence: 99%

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Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

et al. 2019

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Heavy metals polluted soils have turned out to be a common environmental problem across the globe due to their toxic effects and accumulation through the food chain. Heavy metals have lethal effects on all forms of life. For instance, plants grown on heavy metal polluted soil show a reduction in growth and yields. A surge in anthropogenic activities and industrial operations has substantially increased the level of heavy metal pollution and release into the environment; hence, there is need to remediate these heavy metal pollutants. Biosorption is an efficient, economical, ecofriendly and convenient techniques of remediating heavy metal polluted soils. It is a widely accepted method that utilizes biomaterials such as natural biomass as biosorbents. The current study was based on the biosorption of copper, chromium, cadmium and nickel polluted soil using bacteria and fungi isolated from soil. Bacterial species isolated were Pseudomonas, Bacillus, Micrococcus, Escherichia, Streptococcus, Enterobacter and Staphylococcus while fungi isolated were Aspergillus niger, Penicillium notatum and Aspergillus flavus. The isolated bacteria were screened for potential to biosorb copper and chromium likewise fungi for cadmium and nickel. Biosorption rate was determined using atomic absorption spectrophotometry. Five milliliters each of a-day-old culture of the screened bacteria and fungi was inoculated into 45 ml of nutrient broth (bacteria) and potato dextrose broth (fungi) having concentrations of 5, 10, 15 and 20 ppm, respectively, of copper, chromium, cadmium and nickel. The conical flasks were incubated at a temperature of 37 °C and 28 °C ± 2 for bacteria and fungi, respectively, for a period of 35 days of inoculation. For the bacterial isolates, the highest biosorption rates of chromium (89.67%) and copper (90.89%) by Pseudomonas aeruginosa were observed at 20 ppm on day 21 and 15 ppm on day 14, respectively, while for the fungi isolates, P. notatum showed highest biosorption rate for cadmium at 10 ppm with 77.67%. Aspergillus niger showed highest biosorption rate for nickel with 81.07% after 28 days of incubation. The results of this study revealed the ability of Pseudomonas aeruginosa to biosorb copper and chromium and also A. niger and P. notatum to biosorb cadmium and nickel from the environment and can be developed for the biosorption of soils polluted with copper, chromium, cadmium and nickel.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

et al. 2019

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“…The pH of the initial solution determined the charge on the surface of adsorbent and the degree of ionization and speciation of the metal ion. 39 The effect of pH on the adsorption of Cr(VI) was evaluated by changing the initial pH from 2 to 11. According to Fig.…”

Section: Characterization Of Aerogelmentioning

confidence: 99%

The utilization of a three-dimensional reduced graphene oxide and montmorillonite composite aerogel as a multifunctional agent for wastewater treatment

Zhang

Yan

et al. 2018

RSC Adv.

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“…In order to determine the Pb (II) remotion kinetics, batch-type experiments were carried out at 150rpm, by contacting different initial metal concentrations (25,50,75, 100 mg L -1 ) for the unmodified lemon peel pretreated with citric acid.The experiments were performed at pH 3, which was adjusted by adding drops of NaOH or HCl 0.1 N and 0.5 % w v -1 , respectively; and a ratio of 2 g L -1…”

Section: F Adsorption Kineticsmentioning

confidence: 99%

Lead (II) Remotion in Solution Using Lemon Peel (Citrus limonum) Modified with Citric Acid

Tovar¹,

AngelVillabonaOrtiz²,

Correa³

et al. 2018

IJET

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Abstract-Lead remotion was evaluated in a synthetic solution with 100 µg L -1 of Pb (II), using the lemon peel as a biosorbent. The adsorption capacity of the lemon peel at different pH values and particle sizes was studied.A maximum adsorption capacity of 19.556 mg g -1 was achieved with 0.5 g of biosorbent dose at pH 6, being able to remove up to 97.78% with the unmodified biomass and 93.83% after the cross-linking process of the adsorbent material.The adsorption kinetics is based on a Pseudo Second Order model for the biomass of lemon pre-treated with citric acid (R 2 = 0.9586) and not pre-treated (R 2 = 0.9408). It is concluded that lemon peel is a good precursor of lead adsorbent in aqueous solution.Keyword -Biosorption, adsorption kinetics, Freundlich isotherm, lead. I. INTRODUCTIONThe increase in the concentration of heavy metals in water bodies caused by effluent discharges from anthropogenic activities is a growing environmental problem, because even at very low concentrations they are highly toxic[1], [2].Being cadmium, chromium, zinc, mercury, lead and nickel, the metals commonly found in wastewater; and of these, lead can affect the central nervous system, cause cancer and in more critical cases death due to its high toxicity even at low concentrations by binding with organic molecules [3], [4].Once the metals enter the aqueous and terrestrial media, they participate in chemical interactions of complexing, oxide-reduction and precipitation, modifying the characteristics of toxicity and bioavailability by converting from one chemical form to another, varying their toxic effect according to the chemical species of the ion, the degree of acidity-basicity and organic and inorganic components of the environment; factors determining the chemical behaviour of the ion in the formation of soluble or insoluble chemical forms that condition risks to biota and public health[5]- [9].Various technologies have been used for the removal of metal ions, among which are highlighted: chemical precipitation, chemical coagulation, oxidation, reduction, ion exchange, filtration, ultrafiltration, nanofiltration, adsorption (activated carbon, zeolites, silica gel), membrane technologies (reverse osmosis), electrochemical treatment (electrodialysis and electrocoagulation) and application of artificial wetlands (some stabilization), among others, resulting in many cases inefficient and costly [10]- [13]. Consequently, it is important to develop new detoxification technologies for such effluents and to chemically stabilize the compound [14]. This is why the development of new technologies based on domestic raw materials is a pending task for researchers from developing countries such as Colombia. Several studies have shown that the biomass of different species of lignocellulosic waste, bacteria, fungi and algae, are able to retain in their structures, metal ions that are found in aquatic environments [15]-[17].Biosorption is a physicochemical process that includes the phenomena of adsorption and absorption of molecules and allo...

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BIOSORPTION OF CD, CR, MN, AND PB FROM AQUEOUS SOLUTIONS BY Bacillus SP STRAINS ISOLATED FROM INDUSTRIAL WASTE ACTIVATE SLUDGE

Cited by 52 publications

References 24 publications

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

The utilization of a three-dimensional reduced graphene oxide and montmorillonite composite aerogel as a multifunctional agent for wastewater treatment

Lead (II) Remotion in Solution Using Lemon Peel (Citrus limonum) Modified with Citric Acid

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