Effective Removal and Recovery of Lead from Industrial Wastewaters Using Natural Biomass (original) (raw)
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Ecology, Environment and Conservation, 2022
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African Journal of Biotechnology, 2012
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International Research Journal of Engineering and Technology(IRJET), 2019
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A Biosorption study of Lead by Aspergillus Fumigatus
MARKHOR (The Journal of Zoology), 2020
Heavy metals liberated by various industrial and agricultural processes are the major pollutants in soil, agricultural, marine, and industrial and even treated waste waters. Lead is greatly used in many industrial applications such as a storage battery manufacturing, printing, fuels, photographic materials, pigments and explosive manufacturing Objective: To assess the ability of Aspergillus fumigatus for removal of metal contamination such as lead by biosorptionMethods: The pure culture of the Aspergillus fumigatus was used for biosorption. The initial samples were cultured on the bread as the fungal spores were given suitable environmental conditions i.e., temperature, moisture, pH etc. For obtaining the pure culture of the Aspergillus fumigatus culture media was prepared. The spores collected were then allowed to grow on a specific culture media in a sterile Petri plates under aseptic conditions. Inoculation will be carried out by using 20 loops of fungal spores spread on the cult...
Biosorption of Lead (Pb 2+ ) from Industrial Effluent using Green Algae
Heavy metal pollution is one of the most serious environmental problems being faced by the world today. Biosorption has emerged as a cost-effective and efficient alternative technology for removal of heavy metals. The potential of three immobilized algae species for removal of Lead (Pb 2+) from industrial effluent was analysed through batch studies. Algal bloom water samples were obtained from fish ponds in Prof. Olu Odeyemi's Farm, Ilesa. Effluent was collected from industrial discharge system around Ile–Ife (Nigeria). Algae were isolated from the effluent samples using pour plate technique on Allen and Bristol agar media at pH 7.1. The identity of the algae isolates was established using Identification guide to Freshwater and Terrestrial algae. Algae were immobilized with 1.5% calcium alginate and the beads of approximately 3mm were formed using peristaltic pump. Biosorption batch studies was carried out by the addition of 150 beads into 100ml solution (50 ml of wastewater and 50 ml of media) in 250ml conical flask at 100rpm, room temperature and pH 3, 5 and 7. Concentration of Lead (Pb 2+) was determined in 2 days interval using atomic absorption spectrophotometer at 0.04mg/l detection limit. The algal isolates were identified asSynochromonaselaeochrus, Scenedesmusfacatuschodat and Aphanizomenonflos-aquae. The percentage removal of Lead (Pb 2+)by Synochromonaselaeochrus, Scenedesmusfacatuschodat and Aphanizomenonflos-aquae varies with pH and time. At pH 5, Synochromonaselaeochrushad the best percentage removal rate (100%) (that is not detectable in the effluent)while Scenedesmusfacatuschodatand Aphanizomenonflos-aquae performed best at (100%) pH 3 and 5 over the period of time.At pH 7, the percentage removal of Lead (Pb 2+)decreases with time for all algae species. At pH 3, Scenedesmusfacatuschodatand Aphanizomenonflos-aquae performed better by complete (100%) removal of Lead (Pb 2+)starting from day 1 while Synochromonaselaeochrus completely (100%) remove Lead (Pb 2+)starting from day 3. Since the algae isolates showed appreciable sorption of the metal, they can be used for biosorption of metals from industrial effluentprior to its discharge to avoid environmental pollution.
Biosorption of lead using pretreated cells of Aspergillus species
2013
Microbial bioremediation is an emerging technology for environmental cleanup. Application of living biomass for metal binding depends on nutrient type and concentration, environmental conditions and cell age. In addition, living biomass may be subject to toxic effect of heavy metals at elevated concentrations. To overcome the disadvantages; non-viable or dead biomass is preferred. To test these hypothesis three fungal strains were isolated from effluent of chemical and pharmaceutical industry using SDA agar. Identification of the above isolates was carried out and was identified to be predominant strains of Aspergillus i.e. (Aspergillus niger and Aspergillus flavus). Further preliminary test was performed to check the tolerance of the fungi to different metal salts of lead, copper, chromium, zinc, nickel, cadmium using 1mM concentration. All three fungal species showed tolerance to metal salts like lead nitrate, zinc sulphate and cupric sulphate above 20 mM. Furthermore minimum inhi...
Biosorption of Lead by Aspergillus niger: Equilibrium, Kinetics and Process Mechanism
TJPRC, 2013
This paper describes the equilibrium, kinetics and process mechanism studies on biosorption of lead ions from aqueous solution using ‘Aspergillus niger’ in a batch process. The results indicate that biosorption of lead is influenced by various experimental parameters such as initial concentration of lead, amount of biomass used, variation in pH of solution and agitation speed. The lead uptake by biomass was quantitatively evaluated using sorption isotherms like Freundlich and Langmuir isotherm. The results indicate that Langmuir isotherm model describes the present data very well indicating favorable biosorption. Since the process follows pseudo second order kinetics, the mechanism of biosorption of lead by Aspergillus niger can be explained by shrinking core model.
2020
Nowadays biosorption technology is primarily used as a potent tool for solving the environmental pollution, as compared to conventional methods because of its low cost, and environmental safety. It is not associated with secondary pollutions during its operation. The present study is based on checking the capacity of live and pretreated biomass of Aspergillus species for the biosorption of lead metal ions. Among the five species tested, the best results were obtained for A. niger. While the minimum and maximum removals of lead metal ion by live A. niger biomass were 3.84 and 16.42 mg/g at 2 mM and 9 mM concentration respectively, it was increased to 31.25 and 48.44 mg/g respectively at same base concentration for pretreated biomass. Overall, it was observed that pretreated alkali biomass of test fungal species is a potent biosorbent for the metal ions.
Heavy Metal Lead Removal by Biosorption – A Review
International Journal of Engineering Research and, 2016
Biosorption technique is increasingly researched and used in the biosorption of various heavy metals from industrial effluents over the past decades. Factors such as temperature, pH, initial metal ion concentration, biomass concentration and the metal affinity to the biosorbent, affect the efficiency of the biosorption capacity. Biosorbents such as large scale industrial fermentation by-products, agricultural waste, seaweeds, etc are used for lead removal. This article reviews the various research on biosorbents reported from 2013-2016, for the biosorption capacity & the kinetics and equilibrium isotherm models that the sorbents follow for optimum process. The thermodynamics of the process of certain biosorbents have also been selectively overviewed.
Biosorption of lead by indigenous fungal strains
Industrial effluent is a major environmental threat in Pakistan due to contaminant loads, especially of heavy metals. Bioremediation is a process that is in use to remediate effluents and is ecologically sound. In the present study, fungal strains isolated from effluent and adjacent contaminated soil of Koh-i-noor Textile Mills, Rawalpindi, Pakistan, were explored for the potential to remove lead from aqueous solution. A. niger RH 17 and A. niger RH 18 strains were tested for metal resistance on Pb-amended plates, which showed maximum resistance up to 6000 and 7000 mg/L, respectively. In media containing 1000 mg/L Pb, maximum lead removal exhibited by A. niger RH 17 was 92.04% and that by A. niger RH 18 was 93.09%, after three days incubation. The optimum pH for Pb detoxification was 9.0 and 9.5 for A. niger RH 17 and A. niger RH 18 respectively, with respective removal percentage being recorded as 93.8% and 94.2%. Pb biosorption was also assessed at different temperatures, in media...