Determination of lead(II) sorption capacity of hazelnut shell and activated carbon obtained from hazelnut shell activated with ZnCl2

Şencan, Aziz; Karaboyacı, Mustafa; Kılıç, Mehmet Emin

doi:10.1007/s11356-014-2974-9

Cited by 39 publications

(24 citation statements)

References 16 publications

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“…where Q 0 and b are the Langmuir constants determined from the slope and intercept of the plot, which is indicative of maximum adsorption capacity in mg/g of adsorbent and energy of adsorption, respectively [38,39]. e graph of C e versus C e /q e provides the values of Q 0 and b using the slope and the intercept point.…”

Section: Adsorption Isothermmentioning

confidence: 99%

Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments

Orbak

2019

Journal of Chemistry

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Poisonous heavy metals in air, water, and soil produce global environmental problems that are considerable threats to humankind. To meet the local and international guidelines for heavy metal release, companies often use different approaches, such as chemical precipitation, chelating agents, or activated carbon produced by adsorption. One of these heavy and toxic metals is chromium(VI). Chromium(VI) is commonly used in many applications, such as dye fixation in the textile industry or as an anticorrosive agent in paints. e aim of this paper is to explore the factors affecting the removal of one of these deadly heavy metals, chromium(VI), from aqueous solutions. For this purpose, activated carbon from Turkish Tunçbilek lignite is prepared with both chemical and physical activation methods to investigate the adsorption behavior of chromium(VI). e effects of initial chromium(VI) concentration, adsorption temperature, and pH on adsorption are studied using a design of experiments method with a full 2 4 factorial design with center points. e Freundlich and Langmuir adsorption isotherms that are commonly used in chemical engineering are also applied both for predicting the amount of chromium(VI) adsorbed and confirming the validity and advantages of the obtained regression model. e results indicate that the design of experiments and regression can explain and support the design of new materials by using linear and physically meaningful equations instead of local nonlinear and empirical models that are usually insufficient. Additionally, three experiments were carried out in the liquid phase to test the activated carbon samples: chromium, chromium and sucrose, and chromium-sucrose-ion. A change in adsorption capacities of the activated carbon samples was observed. Sucrose was chosen for the experiments because it contains six carbon atoms in a slightly soluble structure. e results indicated that Tunçbilek lignite exhibits good adsorption capability.

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Section: Adsorption Isothermmentioning

confidence: 99%

Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments

Orbak

2019

Journal of Chemistry

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“…When m≥1, it indicates heterogeneous adsorbents. If m is closer or equal to 1, the equation reduced to Langmuir model and indicates homogenous adsorbents (Afkhami et al, 2010;Aksu et al, 2008;Ali et al, 2016;Amuda et al, 2007;Demirbas et al, 2008;Gautam et al, 2014;Karadag, 2008;Sencan et al, 2015;Vaghetti et al, 2009;Vazquez et al, 2009;Wang and Chen, 2006;Zhang et al, 2016).…”

Section: Isotherm Modelsmentioning

confidence: 99%

“…In recent years, especially heavy metal contamination became one of the main environmental problems. Human exposure to toxic elements is dramatically risen due to increase of the use of them in various areas (Gautam et al, 2014;Kadirvelu et al, 2001;Karadag, 2008;Sencan et al, 2015;Tchounwou et al, 2012;Wolfová et al, 2013;Zhang et al, 2016). Besides waste waters, the sources of drinking water (e.g., surface water, groundwater, and seawater) are likely to be polluted by toxic elements due to uncontrolled discharging of heavy metal containing waste waters through environment, the leaching of metals from water distribution system, deposition of heavy metals occurring in the atmosphere because of traffic pollution and industrial activities in soils, etc.…”

Section: Introductionmentioning

confidence: 99%

“…It is important to note that arsenic (As) is a metalloid and selenium (Se) is a nonmetal, however, the term "heavy metal" will be used for the description of the elements studied in this paper. Although trace concentration of some of these elements (Fe, Cu, Cr, Zn, Se, Mn, Ni) are vital for some biochemical processes and physiological functions, they can persist in the environment and can cause serious health problems even at low concentrations (Ali et al, 2016;Amuda et al, 2007;Aremu et al, 2002;Chowdhury et al, 2016;Gautam et al, 2014;Karadag, 2008;Koubaissy et al, 2014;Li et al, 2017;Sencan et al, 2015;Wan Ngah and Hanafiah, 2008;Wang and Chen, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Contaminated waters usually contain more than one metal and non-metal species, and there would be competition between ions for the binding sites on biosorbents. In the literature, removal of heavy metals was studied by using different natural sorbents for systems containing only one or two elements (Afkhami et al, 2010;Ahmedna et al, 2004;Amuda et al, 2007;Bulut and Tez, 2007;Demirbas et al, 2008;Kadirvelu et al, 2001;Karadag, 2008;Kazemipour et al, 2008;Köysüren and Dursun, 2013;Lee et al, 2004;Pehlivan and Altun, 2008;Sencan et al, 2015;Vaghetti et al, 2009;Vazquez et al, 2009;Wan Ngah and Hanafiah, 2008;Wolfová et al, 2013;Zhang et al, 2016). However, the studies about multi-metal containing systems are very restricted.…”

Section: Introductionmentioning

confidence: 99%

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Potential Use of Hazelnut Processing Plant Wastes as a Sorbent for the Simultaneous Removal of Multi-Elements From Water

Dede

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

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In this paper, the effects of pH (1.5-8.0), initial element concentration (0.5 to 20 mg L −1 .) and sorbent dosage (1-20 g L-1) were investigated on the potential use of hazelnut processing plant wastes, hazelnut shell (SH) and hazelnut skin (SK), for the simultaneous removal of Al, Cr, Cu, Cd, Pb, As and Fe from water. The surface morphology of the sorbents, elemental analysis, FTIR, SEM-EDS and BET analysis were performed and specific surface areas of the sorbents were found as 0.676 m 2 g-1 (for SH) and 0.768 m 2 g-1 (for SK). The results showed that surfaces of both sorbents are rough, contains pores that allow to entrap heavy metals and functional groups such as carboxylic acid, phenolic compounds, etc. to which the heavy metal ions can attach. While the optimum pH was determined as 5.0 for all elements in both sorbent systems, the percent removal of heavy metal increased with increase in initial heavy metal concentration up to 8 mg L-1 (except cadmium for SH and copper and cadmium for SK). While optimum sorbent dosage was obtained 10 g L-1 for SH sorbent, increase of sorbent amount led to a decrease of the percentage of removal for SK. Adsorption models were used for the mathematical description of adsorption equilibrium and isotherm constants were evaluated at room temperature (22 ± 2 •C). The adsorption equilibrium data were fitted well to Langmuir and Langmuir-Freundlich models in most cases and showed favorable adsorption behavior

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Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

et al. 2017

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A facile one‐pot synthesis of porous activated biocarbons with a high nitrogen content (NEPBs) through a simple in‐situ self‐assembly of Arundo donax and urea combined with a solid state activation using KOH/ZnCl2 is presented. NEPBs show dominant microporous character and possess a high nitrogen content in the form of pyridinic‐N and pyrrolic‐N and a high specific surface area. The nitrogen content of NEPBs was determined to be in the range of 7.74–19.15%, which was much higher than that of biocarbon derived from non‐activated biomass (1.12%). We also demonstrate that the nitrogen content of NEPBs can easily be tuned by adjusting the impregnation ratios of urea and KOH/ZnCl2. The NEPBs show impressively high CO2 adsorption capacities of 4.8 mmol g−1 at 0 °C/1 bar and 14.1 mmol g−1 at 0 °C/30 bar. A high value of the isosteric heat of adsorption is observed (39 kJ mol−1), confirming the role of nitrogen to enhance the CO2 adsorption capacities through a strong adsorbent‐adsorbate interaction. It is anticipated that the strategy presented here could be extended for the generation of a series of other biomass‐based porous carbon materials with much higher nitrogen contents and controlled textural properties for applications including energy storage and conversion and carbon capture.

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Determination of lead(II) sorption capacity of hazelnut shell and activated carbon obtained from hazelnut shell activated with ZnCl2

Cited by 39 publications

References 16 publications

Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments

Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments

Potential Use of Hazelnut Processing Plant Wastes as a Sorbent for the Simultaneous Removal of Multi-Elements From Water

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

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Determination of lead(II) sorption capacity of hazelnut shell and activated carbon obtained from hazelnut shell activated with ZnCl2

Cited by 39 publications

References 16 publications

Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments

Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments

Potential Use of Hazelnut Processing Plant Wastes as a Sorbent for the Simultaneous Removal of Multi-Elements From Water

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO2 Capture

Contact Info

Product

Resources

About

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture