Synthesis and characterization of a new magnetic bio-adsorbent using walnut shell powder and its application in ultrasonic assisted removal of lead

Safinejad, Ali; Chamjangali, Mansour Arab; Goudarzi, Nasser; Bagherian, Ghadamali

doi:10.1016/j.jece.2017.02.027

Cited by 41 publications

(8 citation statements)

References 38 publications

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“…An increase in population has resulted in rapid increase in industrialization, which creates room for more generation of effluent and domestic wastewaters into the aquatic ecosystem (Adewuyi and Pereira 2017;Azari et al 2017;Aguilar et al 2019). These wastewaters contains heavy metals such as cadmium, zinc, lead, chromium, nickel, arsenic and copper which are generated from electroplating, pulp and paper manufacturing, mining operation, ceramics industry, textile, acid battery production process, pharmaceutical and printing (Siva kiran et al 2017;Safinejad et al 2017). These heavy metals enter the plants, animals and human bodies through food chain which affects their health and functional activity (Safinejad et al 2017;Yao et al 2016;Schullehner et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of lead(II) from aqueous solution using Africa elemi seed, mucuna shell and oyster shell as adsorbents and optimization using Box–Behnken design

et al. 2020

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The aim of this study was to model and optimize the adsorption of Pb(II) ions from an aqueous solution using Africa elemi seed, mucuna shell and oyster shell modified with orthophosphorous acid used as adsorbents. The influence of operational parameters such as adsorbent dosage, initial pH and contact time was evaluated by response surface methodology (RSM). The interactions between the operational parameters were evaluated using Box-Behnken design of response surface methodology. The optimum conditions for maximum removal of Pb(II) ions were observed at pH of 2.0, 100 mg adsorbent dosage and 70 min of contact time, with correlation coefficient R 2 , 0.996 for Africa elemi seed adsorbent; pH of 6.0, 100 mg adsorbent dosage and 40 min contact time with R 2 0.996 for mucuna shell adsorbent; and pH of 6.0, 100 mg adsorbent dosage and contact time of 40 min for oyster shell adsorbent. The ANOVA results obtained from the RSM were analyzed using secondorder polynomial equations, and the contour plots showed the interaction among the variables of the adsorption. This shows that the prepared low-cost adsorbents can be effectively adopted for the removal of Pb(II) ions from industrial wastewaters.

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Section: Introductionmentioning

confidence: 99%

Adsorption of lead(II) from aqueous solution using Africa elemi seed, mucuna shell and oyster shell as adsorbents and optimization using Box–Behnken design

et al. 2020

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“…, and , and the maximum adsorption capacity of MWNS2 is 215.65 mg g ‐1 at 298 K, which is larger than that of several previous literatures (28.57 mg g ‐1 at 298 K from Ref. , 198.51 mg g ‐1 at 298 K from Ref. , and 208.76 mg g ‐1 at 298 K from Ref.…”

Section: Resultsmentioning

confidence: 58%

A new modified walnut shell by grafting l‐aspartic acid: Synthesis and kinetics

Qiu

Zeng

2020

Int J of Chemical Kinetics

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A new modified walnut shell was prepared by grafting l‐aspartic acid (ASP) to walnut shell (WNS) in the hydrochloric acid solution (1.0 M). The effects of stirring speed, particle size, solid‐liquid ratio, temperature, and modifying agent concentration on grafting yield were studied. The grafting process conditions were optimized, and the grafting yield of WNS reached ∼14 wt%. The kinetics of the grafting reaction was investigated in the temperature range of 348‐368 K. A three‐step hypothesis was proposed to describe the grafting process: The ASP molecules diffuse to the out surface of WNS through the liquid film, then attend to the internal surface and react with WNS. The shrinking core models with different controlling steps were used to fit the kinetic data of the grafting process, and the results showed that the model controlled by a product layer fitted well with the experimental data. The internal diffusion coefficient DA of ASP in WNS has been calculated, and it was applied to predict the grafting yield at different ASP concentrations by a shrinking core model. The results showed that the shrinking core model controlled by internal diffusion is suitable.

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“…The use of waste materials is attractive because it helps in reducing the cost of waste disposal and minimizing the waste. These agricultural wastes include the shells and/or stones of fruits like coconut [11][12][13], peanuts [14], walnut [15], cashew [16,17 ]; fruit peels of orange [18,19], pomelo [20],citrus [21], banana [22]; rice husk [23][24][25]; and sugar cane bagasse [26]. These agricultural waste as adsorbents have been explored in SPE as low-cost nanometersized materials [27,28].…”

Section: Nano-chamomile Waste As a Low-cost Biosorbent For Rapid Remomentioning

confidence: 99%

“…The functional materials obtained thus can effectively remove certain toxic metals from aqueous media. However, these modifications are usually timeconsuming and most of these nano-adsorbents usually require an expensive mechanical grinder to obtain their particles in nanometer size [15,29]. Thus, the development of a new adsorbent is essential with a large adsorbent surface area and high uptake capacity using in a simple, fast and inexpensive method to overcome these limitations.…”

Section: Nano-chamomile Waste As a Low-cost Biosorbent For Rapid Remomentioning

confidence: 99%

Nano-chamomile waste as a low-cost biosorbent for rapid removal of heavy metal ions from natural water samples

2019

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I N this study, we report the feasibility of using nano chamomile waste (NCW) as a selective solid phase extractor for heavy metal ions. The experimental parameters including pH (1.0-6.0), metal ion concentration (10-100 µmole), adsorbent dose (10-1000 mg), and biosorption time (0.5-90 min) were altered by using the batch technique to optimize the maximum capacity of this new biosorbent. The experimental data by NCW agreed with both Freundlich and Langmuir models (R 2 =0.999) with maximum uptake capacities of 621.6 mgg-1 (3 mmolg-1) for Pb (II), 163.9 mgg-1 (2.58 mmolg-1) for Cu (II), and 522.7 mgg-1 (9.36 mmolg-1) for Fe (III). In addition, the values of metal uptake as a function of time agreed with the kinetic pseudosecond-order model. The kinetic experiments confirmed the fast accessibility of metal ions to the biosorbent surface resulting in equilibrium within 30 s. NCW was also characterized using FT-IR spectra and the crystallinity of the biosorbent was characterized using X-ray diffraction (XRD). The morphological characterization and particle size of NCW were obtained using SEM and TEM, respectively. Our method was investigated to measure Pb (II), Cu (II), and Fe (III) with a certain spiked amounts in natural water samples such as groundwater (GW), drinking tap water (DTW), natural drinking water (NDW), Nile River water (NRW), seawater (SW), and wastewater (WW). A removal efficiency of ≥98% was obtained for all collected samples using batch experiments and without matrix interferences. Considering its cheap source, simple, economic and fast uptake process, NCW can be used as a low-cost nano biosorbent for the removal of metal ions from natural water samples.

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Synthesis and characterization of a new magnetic bio-adsorbent using walnut shell powder and its application in ultrasonic assisted removal of lead

Cited by 41 publications

References 38 publications

Adsorption of lead(II) from aqueous solution using Africa elemi seed, mucuna shell and oyster shell as adsorbents and optimization using Box–Behnken design

Adsorption of lead(II) from aqueous solution using Africa elemi seed, mucuna shell and oyster shell as adsorbents and optimization using Box–Behnken design

A new modified walnut shell by grafting l‐aspartic acid: Synthesis and kinetics

Nano-chamomile waste as a low-cost biosorbent for rapid removal of heavy metal ions from natural water samples

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