Biosorption of Heavy Metal From Cadmium Rich Aqueous Solutions by Tea Waste as a Low Cost Bio-Adsorbent

Ghasemi, Sadegh; Gholami, Roya Mafi; Yazdanian, Mohsen

doi:10.17795/jjhs-37301

Cited by 6 publications

(11 citation statements)

References 29 publications

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“…Yang et al 29 conducted Ni(II) removal experiments using modified green tea waste and determined the maximum removal efficiency of Ni(II) as approximately 75% in 10 min. Ghasemi et al 45 applied the adsorption method with tea waste for the removal of Cd from aqueous solutions. Their experimental results showed that the maximum removal of Cd with tea waste was 99.5% at 90 min.…”

Section: Effect Of Btw Amount On the Adsorption Efficiencymentioning

confidence: 99%

“…Among the kinetic studies conducted, the Pseudo-second-order (PSO) (R 2 = 0.99) was able to express the adsorption in this study clearly. The PSO model consisted of the external liquid film diffusion, surface adsorption and intra-particle diffusion processes 19,39,45,52 . Therefore, the results of this model can be accepted as a clearer and more reliable description of the adsorption mechanism between the BTW and the Pb, Cd, Zn and Ni ions.…”

Section: Adsorption Isotherm and Kinetic Models In This Study The Lmentioning

confidence: 99%

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Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Çelebi

Gök

2020

Sci Rep

153

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Recently, the search for low-cost eco-friendly adsorbents has become one of the main objectives of researchers. The aim of this study was to test the removal of four heavy metals, namely lead (Pb), zinc (Zn), nickel (Ni) and cadmium (Cd), from a simulated watery solution using brewed tea waste as a potentially suitable adsorbent. The effects of pH levels (2.0–6.0), adsorbent amount (0.1–5.0 g), contact times (1–150 min.) were examined throughout the adsorption process. The results of the experiments showed that the heavy metals elimination yields had an inverse relationship with pH and a linear relationship between the other parameters. The optimum pH for the removal of the heavy metals was between 4.0 and 5.0 in the case of the brewed tea waste. Equilibrium times of 2, 10, 30 and 5 min were required for the adsorption of Pb, Zn, Ni, Cd onto Camellia sinensis, respectively. Based on the results of this study it can be said that brewed tea waste has a high potential to remove heavy metals from aqueous solutions. The maximum adsorption capacities were calculated as 1.197, 1.457, 1.163 and 2.468 mg/g, for Pb, Zn, Ni and Cd, respectively, by fitting the equilibrium data to the Langmuir isotherm model.

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Section: Effect Of Btw Amount On the Adsorption Efficiencymentioning

confidence: 99%

Section: Adsorption Isotherm and Kinetic Models In This Study The Lmentioning

confidence: 99%

Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Çelebi

Gök

2020

Sci Rep

153

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“…The detailed composition of almond shell, eggshell, banana peel, pumpkin seed hull, Rooibos (red)-green-black tea waste, clay minerals are shown in Table 3 [39][40][41][42][43][44][45][46][47][48][49][50][51]. The surface physical morphology of the adsorbents identified by scanning electron microscope (SEM) was evaluated according to previous studies due to lack of laboratory facilities.…”

Section: Characterization Of Adsorbentsmentioning

confidence: 99%

“…Scanning electron microscope observations of adsorbents can be seen in Fig. 4 [39][40][41][42][43][44][45][46][47][48][49][50][51]. It can be seen that all adsorbents were agglomerated and have an irregular round shape.…”

Section: Characterization Of Adsorbentsmentioning

confidence: 99%

Investigation of removal of anthocyanin in turnip juice wastewater by using different adsorbents

et al. 2019

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The aim of this study is to eliminate the colour pigment of anthocyanin in the composition of turnip juice under different experimental conditions using low cost adsorbents (eggshells, pumpkin seed hulls, almond shells, black-green-red tea wastes, natural clay material). For this purpose, a series of discrete adsorption experiments were performed. Contact time for each set of experiments, adsorbent amount, mixing speed and temperature were fixed at 30 min, 2 g, 150 rpm and 20 °C. The effects of pH change of wastewater (acidic-neutral-basic) on colour removal and adsorption process were examined. The most important advantage of using such adsorbents is their ability to solve colour pollution problem as effective and economical adsorption. As a result of the studies, the colour parameter of the anthocyanins was removed from the wastewater at a low rate (14.08%).

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“…Because conventional methods have some drawbacks such as high operational costs, the requirement for new reagents and the production of sludge as a secondary pollutant which needs to be treated, they can be alternated with biosorption, which is cost effective, easy to operate and environmentally friendly. Widely used cheap agricultural wastes to remove Cd from aqueous solutions include rice straw [2], leaf biomass of the sodom apple [3], tea waste [4], rice bran [5], and loquat leaves [6]. Jute stick is one of the most abundant lingo-cellulosic agricultural waste by-products of jute fiber, which is the main cash crop of Bangladesh.…”

Section: Introductionmentioning

confidence: 99%

Isotherm and Kinetic Modeling of Cd(II) Uptake from Aqueous Solutions using an Agri-Waste Bisorbent Jute Stick Powder

Jahangir¹,

Atique²,

Uddin³

2020

Braz. J. Anal. Chem.

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The removal of cadmium(II) from aqueous solutions in a batch system was conducted by using an agri-waste biomass Jute Stick Powder (JSP). To optimize parameters like metal concentration, solution pH, adsorbent amount, contact time and agitation speed, batch experiments were conducted. Further experiments were performed, using optimized conditions at pH 4.5, adsorbent dosages of 0.5 g/100 mL, a contact time of 60 min and shaking speed of 180 rpm. Favorable adsorption occurred at around pH 4.5, with a maximum adsorption capacity of 10.003 mg g-1. Detailed analysis has been conducted by testing kinetic models such as pseudo-first-order and pseudo-second-order models to determine the sorption rate and mechanism. The adsorption process was confirmed by various isotherm models and experimental data for Cd(II) biosorption fitted well to the Freundlich isotherm model at room temperature and under optimum conditions. Positive values of the thermodynamic parameter ΔG assumed that the metal adsorption process was spontaneous. JSP can be used repeatedly more than three times with a small efficiency loss. Experimental data plotted to the isotherm and kinetic models confirms that JSP can be used as a potential biosorbent for the successful removal of Cd(II) ions from waste water.

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Biosorption of Heavy Metal From Cadmium Rich Aqueous Solutions by Tea Waste as a Low Cost Bio-Adsorbent

Abstract: Background: Heavy metals pollution is a serious threat to environment and human health. Therefore, it is vital to find an effective method to remove heavy metals from natural resources.

Cited by 6 publications

References 29 publications

Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Investigation of removal of anthocyanin in turnip juice wastewater by using different adsorbents

Isotherm and Kinetic Modeling of Cd(II) Uptake from Aqueous Solutions using an Agri-Waste Bisorbent Jute Stick Powder

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