Adsorptive removal of lead and arsenic from aqueous solution using soya bean as a novel biosorbent: equilibrium isotherm and thermal stability studies

Gaur, Nisha; Kukreja, Aayush; Yadav, Mukesh; Tiwari, Archana

doi:10.1007/s13201-018-0743-5

Cited by 52 publications

(28 citation statements)

References 50 publications

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“…This is corroborated by BET surface area analysis and is the main reason why Cu-MOF adsorbent exhibited better performance. A similar observation was reported by Gaur et al (2018) for the adsorption of lead and arsenic ions on soya bean adsorbent.…”

Section: Effect Of Contact Timesupporting

confidence: 88%

Adsorption of cadmium ion from aqueous solutions by copper-based metal organic framework: equilibrium modeling and kinetic studies

2019

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In the present study, the adsorption behavior of copper-based metal organic framework (Cu-MOF) in the removal of cadmium ion (Cd 2+) from aqueous solution was investigated. The Cu-MOF prepared by solvothermal method was characterized by BET, FTIR, SEM and EDX techniques. Effect of adsorption parameters such as initial Cd 2+ concentration (20-100 mg/L), contact time (20-60 min) and adsorbent dosage (0.1-0.5 g) on the removal efficiency and equilibrium adsorption capacity was investigated at fixed pH and temperature. The results obtained from the batch mode adsorption studies revealed that at initial Cd 2+ concentration of 20 mg/L, contact time of 60 min and adsorbent dosage of 0.5 g, the removal efficiency and equilibrium adsorption capacity of Cd 2+ from the process were 98.62% and 1.9724 mg/g, respectively. The experimental data were evaluated by Langmuir and Freundlich isotherm models. The data fitted well with the Langmuir isotherm, and monolayer adsorption capacity of the Cu-MOF was 219.05 mg/g. The kinetic data were analyzed by using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The kinetic studies showed that pseudo-second-order model exhibited high correlation coefficients for all the initial Cd 2+ concentrations studied, thus indicating that the theoretical amount of Cd 2+ adsorbed agreed to the experimental values of Cd 2+ adsorbed.

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Section: Effect Of Contact Timesupporting

confidence: 88%

Adsorption of cadmium ion from aqueous solutions by copper-based metal organic framework: equilibrium modeling and kinetic studies

2019

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“…However, the maximum adsorption capacity of H 2 SO 4 -treated CNS is comparable to that of various biosorbents reported in the earlier literature. Under similar conditions (adsorbent loading, Pb(II) concentration, and temperature), the q max value of H 2 SO 4 -treated CNS was of the same order of magnitude as of biosorbents derived from agricultural wastes such as cedar leaf ash 53 , peanut shell 54 , pomelo peel 55 , soya bean seed 56 , and mushroom biomass 57 . At the same adsorbent loading (4 g/L), H 2 SO 4 -treated CNS gave higher value of q max than the adsorbents derived from plum and apricot kernels 1 .…”

Section: Effect Of the Initial Concentration Of Pb(ii)mentioning

confidence: 88%

Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution

Nuithitikul

Phromrak

Saengngoen

2020

Sci Rep

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In this study, cashew nut shells (CNS), waste from a cashew nut processing factory, have been used as an adsorbent for Pb(II) ions in water. Treatments of CNS with 1 M of H 2 So 4 , HNO 3, and NaOH solutions were performed to modify their surfaces and improve their adsorption capacities. characterization of untreated and chemical-treated CNS was carried out using nitrogen adsorption isotherm, elemental (CHN) analysis, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDX). In the study of Pb(II) removal, various models of adsorption kinetics and isotherms were evaluated against the experimental data. the results showed that H 2 So 4-treated cnS exhibited the highest adsorption capacity. the chemical treatment removes impurities, alters the surface functional groups and improves specific surface areas and pore volumes of native CNS significantly. Surface adsorption and intra-particle diffusion steps were found to substantially affect the overall adsorption process of Pb(II) on H 2 So 4-treated cnS. owing to its easy preparation and comparable adsorption capacity, H 2 So 4-treated cnS has the potential to be developed as a low-cost adsorbent for the removal of pb(ii) from contaminated water. Water is a natural resource necessary for living and sustaining our ecosystem. The increases in human population and industrial processes have released more polluted water into the environment unless proper treatments are implemented effectively. Owing to the water solubility of heavy metals under favorable pH/Eh conditions, water is inevitably contaminated with heavy metals, mostly discharged from several industries 1. Such contaminated water leads to environmental problems and accumulation of heavy metals in the food chain which finally returns to human beings. Numerous disorders and diseases are caused by the deposition of heavy metals. Ions of lead, mercury, cadmium and chromium have been reported to be at the top of the toxicity list 2. Lead (Pb) ions contaminated in water are highly toxic to humans and the environment. The sources of lead include the steel and metal alloy industries, welding and electroplating processes, and manufactures of batteries, pigments and ammunition 2-4. The accumulation of lead in the human body at a certain level can seriously destroy the nervous system, organs (i.e., heart, kidneys, and reproductive system) and tissues 5,6. The World Health Organization specifies the maximum concentration of lead ions in drinking water as 0.01 mg/L 7. Several methods have been introduced to remove heavy metal ions from contaminated water such as chemical precipitation, membrane filtration, ion-exchange, electrochemical methods, flotation, and adsorption. Many methods have drawbacks which are high capital and operating costs, the requirement of extra chemicals and high energy, generation of hazardous sludge, and low performance for diluted wastewater 8. Among these methods, adsorption is very attractive owing to its easy operat...

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“…Figure 3b shows that there was slight increase in arsenic(III) removal initially from 0.05 g (78%) to 0.15 g (79%) before a rapid rise was recorded. The reason may be due to increasing availability of surface active sites resulting from the increased dose of adsorbent [26].…”

Section: Influence Of Adsorption Variablesmentioning

confidence: 99%

Abstraction of arsenic(III) on activated carbon prepared from Dialium guineense seed shell: kinetics, isotherms and thermodynamic studies

et al. 2019

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Removal of arsenic(III) from aqueous solution has been studied using activated carbon produced from Dialium guineense seed shell by impregnation of carbonized sample with zinc chloride and thermal activation. The zinc chloride activated sample was selected because it produced the highest iodine number, mg/g (962.52) compared to the raw sample (601.57), phosphoric acid and nitric acid impregnated samples (802.10, 868.95). Proximate analysis of raw D. guineense seed shell revealed low ash content of 1.70% and moderate fixed carbon of 32.97%. The prepared adsorbent was characterized using Brunaeur-Emmett-Teller surface area, SEM and FTIR analyses. The surface area of the zinc chloride activated adsorbent was 533.94 m 2 /g and its micropore volume 0.475 cm 3 /g, with a porous structure that is well organized. Batch adsorption experiments were done by changing the following parameters: adsorbent dose, pH, contact time, initial metal ion concentration and temperature. Adsorption increased as each parameter was varied but decreased with increase in initial arsenic(III) concentration. The Freundlich model presented better fit with R 2 of 0.998 compared to the Freundlich isotherm (0.991) and Tempkin isotherm (0.984). The positive value of ∆H° 51.68 kJ/mol showed the endothermic nature of adsorption. The study demonstrated the potential of D. guineense seed shell as low cost adsorbent for removing arsenic(III) from polluted water.

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Adsorptive removal of lead and arsenic from aqueous solution using soya bean as a novel biosorbent: equilibrium isotherm and thermal stability studies

Cited by 52 publications

References 50 publications

Adsorption of cadmium ion from aqueous solutions by copper-based metal organic framework: equilibrium modeling and kinetic studies

Adsorption of cadmium ion from aqueous solutions by copper-based metal organic framework: equilibrium modeling and kinetic studies

Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution

Abstraction of arsenic(III) on activated carbon prepared from Dialium guineense seed shell: kinetics, isotherms and thermodynamic studies

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