Continuous biosorption of cadmium by Moringa olefera in a packed column

Rajeswari, M.; Agrawal, Pushpa; Pavithra, S.; Priya, .; Sandhya, G. R.; Garre, Pavithra

doi:10.1007/s12257-012-0424-4

Cited by 22 publications

(12 citation statements)

References 15 publications

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“…Biosorption of arsenic(V) by Moringa oleifera seed powder using a batch and continuous mode techniques was studied by Rajeswari and Pushpa (2014) [116]. Batch adsorption experiments were performed as a function of solution pH, biosorbent dose, contact time, and initial metal concentration.…”

Section: Different Adsorbents Derived From Agricultural By-products/wmentioning

confidence: 99%

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Sulyman

Namieśnik

Gierak

2017

Pol. J. Environ. Stud.

201

112

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A major threat to the comfort of human life has been imposed by increased industrialization and urbanization. The generation and disposal of huge amounts of toxic materials and pollutants have heavily contaminated our environment. Some Organics such as synthetic dyes (SD) and heavy metals (HM) are becoming increasingly prevalent as the most dangerous pollutants in soil and surface water environments. They are causing great concern worldwide due to their toxicity to many life forms.Environmentally friendly utilization of agricultural by-products/waste materials either as raw materials or in production of so-called activated carbons (AC) is an important issue. Because it is apparent from our literature review that the main factors characterizing these materials are their affordability, local availability, and efficiencies in removing many unwanted toxics and pollutants, they therefore could be utilized instead of more conventional but expensive adsorbent materials, particularly in developing countries where many industries lack appropriate individual sewage treatment systems; even where they exist, they lack satisfactory functioning and maintenance because of the lack of good budgets.A number of case studies are supplied in this review. These case studies have pointed to the efficient removal of SD/HM ions from aqueous solutions by the agricultural by-products/wastes in the form of a raw material, signifying spent tea leaves (STL) as a good example. Besides, the efficient removal of such ions by AC produced from these agricultural by-products/wastes has also been given in detail, suggesting a variety of AC agricultural by-products/wastes sources. Both kinds are widely used adsorbents in the treatment of wastewaters. Our review has shown that these adsorbents are characterized by many exceptional physical and chemical features that make them widely used adsorbents in the treatment of wastewaters. The adsorption efficiencies by these substances were also affected by the characteristics of AC, which depend on the physical and chemical properties of the precursor (i.e., agricultural by-products/wastes) as well as on the activation method applied, which is either chemical or physical. The structural properties of the resulting

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Section: Different Adsorbents Derived From Agricultural By-products/wmentioning

confidence: 99%

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Sulyman

Namieśnik

Gierak

2017

Pol. J. Environ. Stud.

201

112

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“…The bed depth/service time (BDST) model is used to assume the relationship between depth X and service time t . In this model, a linear relationship exists between the bed height and the service time of the adsorption column.…”

Section: Column Isothermsmentioning

confidence: 99%

Heavy Metal Removal by Fixed‐Bed Column – A Review

2018

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Industrial wastewater often contains heavy metals that, if not removed, pose a risk to the environment. Therefore, an extended overview of different methods for heavy metal removal by columns was conducted. Column studies are dependent on the flow rate, bed height and diameter, breakthrough curve, type of wastewater, and adsorbent. The fixed-bed column is most commonly used for metal sequestration in aqueous media. Column studies have advantages due to industrial scale applicability and can treat large quantities of wastewater. Many kinetics models are applied in column studies like Adam-Bohart, Yoon Nelson, Bed Depth/Service Time, Thomas, and Clark. This paper deals with the use of modified or non-modified adsorbents for the treatment of metal-laden water and wastewater by column technique.

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“…Biosorption has come out as headway towards non-hazardous environment-friendly, economical and upstanding technology playing marvelous role in this area. Both organic and inorganic materials can be removed from their solutions by biosorption (11) using low cost and easily available biosorbent materials (12).…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Cd(II) ions from its aqueous solutions using powdered branches of Trifolium resupinatum: equilibrium and kinetics

Khurram

Farooq

Athar

et al. 2019

Green Chemistry Letters and Reviews

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Cadmium(II) is well known for its toxicity and its removal is a prominent task in the field of environmental research. Trifolium resupinatum (TR) has been investigated for the biosorptive removal of Cd(II). The material was characterized by FTIR and SEM. These well established the nature of functional groups and the surface morphology. The effects of various process parameters including time of contact, concentration, pH and temperature were optimized. The maximum removal was observed at 20 min and a pH of7. The equilibrium was described by the Langmuir model showing the maximum biosorption of 31.95 mg/g. The binding of Cd(II) ions was found to be endothermic in nature. The biosorbent from T. resupinatum was found to adsorb potentially the toxic metal ions from its aqueous solutions.

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Continuous biosorption of cadmium by Moringa olefera in a packed column

Cited by 22 publications

References 15 publications

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Heavy Metal Removal by Fixed‐Bed Column – A Review

Biosorption of Cd(II) ions from its aqueous solutions using powdered branches of Trifolium resupinatum: equilibrium and kinetics

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