Removal of cadmium from aqueous solution using waste shells of golden apple snail

Zhao, Benliang; Zhang, Jiaen; Yan, Wu; Kang, Xiaowu; Cheng, Chaogang; Ouyang, Ying

doi:10.1080/19443994.2016.1140078

Cited by 28 publications

(29 citation statements)

References 38 publications

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“…e rod-shaped FSS particles had many crystalline microlayers and their thickness and width, respectively, were 1.5 μm and 2.8 μm. is result agreed with several previous reports by Van et al [21] with S BET of 1.45 m 2 /g for a CaCO 3 -rich biosorbent-biogenic aragonite shells-and 2.09 m 2 /g for golden apple snail shells [22]. In addition, the characteristic peaks of calcium silicate (Ca 2 SiO 4 ) were also observed with low intensity on the XRD pattern, indicating the small amount of this compound present in FSS.…”

Section: Resultssupporting

confidence: 92%

“…pH PZC was determined according to the pH shift method [22]: first, 10 mL of 0.01 M NaCl solutions were adjusted to a desirable pH value (pH initial , from 3 to 10) with 0.1 M NaOH and 0.1 M H 2 SO 4 . en, 30 mg of FSS was added to the NaCl solution in a 100 mL Erlenmeyer flask and shaken on a shaker for 48 h at 120 rpm at room temperature (25 ± 1°C).…”

Section: Characteristics Of Biosorbentmentioning

confidence: 99%

“…e various dosages of FSS (2,4,6,8,10,12,14,16,18,20,22,24,26,28, and 30 g/L) in 30 mg/L of initial Cr(VI) were studied for Cr(VI) adsorption at optimum pH (pH 2) and a contact time of 120 min. e results are presented in Figure 8.…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

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Adsorption of Chromium(VI) onto Freshwater Snail Shell-Derived Biosorbent from Aqueous Solutions: Equilibrium, Kinetics, and Thermodynamics

Nguyen

Van

et al. 2019

Journal of Chemistry

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In this study, freshwater snail shells (FSSs) containing CaCO3 were used as a low-cost biosorbent for removing Cr(VI) from aqueous solutions. The characteristics of FSS and mechanism of Cr(VI) adsorption onto FSS were investigated. The FSS biosorbent was characterized using nitrogen adsorption/desorption isotherm, X-ray diffraction, scanning electron microscopy with energy dispersive spectroscopy, and Fourier transform infrared spectroscopy. The adsorption mechanism was determined by conducting various batch adsorption experiments along with fitting experimental data with various adsorption models. Batch adsorption experiments were conducted as a function of solution pH, contact time, biosorbent dose, and initial Cr(VI) concentration. Results indicated that pH = 2, a contact time of 120 min, and an initial Cr(VI) concentration of 30 mg/L at 20°C were the best conditions for adsorption of Cr(VI) onto FSS. The Cr(VI) adsorption onto FSS decreased with an increase in temperature from 20 to 40°C. The obtained maximum adsorption capacity was 8.85 mg/g for 2 g/L of FSS dose with 30 mg/L of initial Cr(VI) at 20°C. The adsorption equilibrium data fit well with the Sips and Langmuir isotherm models at 20°C with a high R2 of 0.981 and 0.975, respectively. Also, a good correlation between the experimental data and the pseudo-second-order model was achieved, with the highest R2 of 0.995 at 20°C. The adsorption mechanisms were electrostatic interaction and ion exchange. Simultaneously, this mechanism was also controlled by film diffusion. The Cr(VI) adsorption process was irreversible, spontaneous (−∆G°), exothermic (∆H° is negative), and less random (∆S° is negative). In conclusion, freshwater snail shells have the potential as a renewable adsorbent to remove toxic metals from wastewater.

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Section: Resultssupporting

confidence: 92%

Section: Characteristics Of Biosorbentmentioning

confidence: 99%

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Adsorption of Chromium(VI) onto Freshwater Snail Shell-Derived Biosorbent from Aqueous Solutions: Equilibrium, Kinetics, and Thermodynamics

Nguyen

Van

et al. 2019

Journal of Chemistry

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“…The presence of surface functional groups of AgNPs-TAC was detected using Fourier transform infrared spectroscopy (FT/IR-6300) in the 4000-500 cm −1 range. The pH at the point of zero charge (pH PZC ) was determined by the shift method 21 . Determination of the surface area and the porous structure was conducted using Brunauer-Emmett-Teller (BET -BET, Builder, SSA-4300).…”

Section: Batch Adsorption Experiments Initially An Adsorption Expermentioning

confidence: 99%

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Trinh

Nguyen

Van

et al. 2020

Sci Rep

134

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Vu 6 , t. t. pham 7 , thi nu nguyen 8 , n. V. Quang 9 & X. c. nguyen 10,11* this study presents the removal of phosphate from aqueous solution using a new silver nanoparticlesloaded tea activated carbon (Agnps-tAc) material. in order to reduce costs, the tea activated carbon was produced from tea residue. Batch adsorption experiments were conducted to evaluate the effects of impregnation ratio of Agnps and tAc, pH solution, contact time, initial phosphate concentration and dose of Agnps-Ac on removing phosphate from aqueous solution. Results show that the best conditions for phosphate adsorption occurred at the impregnation ratio AgNPs/TAC of 3% w/w, pH 3, and contact time lasting 150 min. The maximum adsorption capacity of phosphate on AgNPs-TAC determined by the Langmuir model was 13.62 mg/g at an initial phosphate concentration of 30 mg/L. The adsorption isotherm of phosphate on AgNPs-TAC fits well with both the Langmuir and Sips models. The adsorption kinetics data were also described well by the pseudo-first-order and pseudo-secondorder models with high correlation coefficients of 0.978 and 0.966, respectively. The adsorption process was controlled by chemisorption through complexes and ligand exchange mechanisms. this study suggests that Agnps-tAc is a promising, low cost adsorbent for phosphate removal from aqueous solution.

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“…The shells of the freshwater snail Pomacea canaliculata is used as PVC composite materials 37 as well as for metal bioremediation. 38 As a biocatalyst, the processed shells of freshwater snails are used for biodiesel production. 39 − 41 The hydroxyapetite prepared from shells of Bellamya javanica using chitosan also provides a prospective use of the shells of freshwater snails.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Analysis and Chemical and Mechanical Characterization of the Shells of Three Freshwater Snails

et al. 2020

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The shells of freshwater snails are discarded as waste, which qualify as biological materials with prospective multiple uses. To substantiate this proposition, an attempt was made to elucidate the physical and chemical properties of the shells of three freshwater snails, namely, Bellamya bengalensis , Pila globosa , and Brotia costula . The shells were prepared for electron microscopy and assessment of the calcium carbonate content, apart from the Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and nanoindentation studies. The results indicated that the calcium carbonate content ( y ) of the shells ranged between 87 and 96% of the total weight ( x ) and complied with a power regression equation: y = 0.801 x 1.016 ; R 2 = 0.994; r = +0.998; P < 0.001. Observations through SEM depicted different snail species-specific arrangement patterns of calcium carbonate crystals in the diverse layers of shells. The XRD, FTIR, and EDS observations revealed the dominance of the aragonite form of the calcium carbonate crystal in the microstructures of each snail shell with the occurrence of different shell surface functional groups. The Brunauer–Emmett–Teller analysis elucidated the surface textures of shell dust taken from each snail species; in addition, the nanohardness properties indicate the shells as a tough biocomposite exoskeleton. Species-specific variations in the shell morphology, microstructure, and calcium carbonate content were prominent for the three freshwater snails considered for the study. Nonetheless, the physical and chemical properties substantiate that the shells of B. bengalensis , P. globosa , and B. costula qualify as biological materials for sustainable use in various fields including bioremediation, biocatalyst, biomedical applications, and a source of lime. Since the shells of the freshwater snails are discarded as aquaculture waste, subsequent use as a biological material will support the “waste made useful” paradigm in sustainability, both from ecological and economic perspectives.

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Removal of cadmium from aqueous solution using waste shells of golden apple snail

Cited by 28 publications

References 38 publications

Adsorption of Chromium(VI) onto Freshwater Snail Shell-Derived Biosorbent from Aqueous Solutions: Equilibrium, Kinetics, and Thermodynamics

Adsorption of Chromium(VI) onto Freshwater Snail Shell-Derived Biosorbent from Aqueous Solutions: Equilibrium, Kinetics, and Thermodynamics

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Microstructure Analysis and Chemical and Mechanical Characterization of the Shells of Three Freshwater Snails

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