Highly efficient and selective adsorption of heavy metal ions by hydrazide-modified sodium alginate

Shi, Tianzhu; Xie, Zhenzhen; Zhu, Zhu; Shi, Wei; Liu, Yucheng; Liu, Minyao

doi:10.1016/j.carbpol.2021.118797

Cited by 92 publications

(16 citation statements)

References 47 publications

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“…Likewise, studies were performed on the absorption phenomena of other ions such as Zn 2+ , Cr 3+ , Hg 2+ and Cu 2+. 31,32 The results obtained and reported in Table 3 show that the linear correlation coefficient of the Redlich–Peterson model is between the coefficient values of the two models Langmuir and Freundlich. Figure S4 presents the nonlinear function of isothermal Redlich–Pertson model with the curve obtained experimentally.…”

Section: Resultsmentioning

confidence: 87%

Rapid elimination of copper (II), nickel (II) and chromium (VI) ions from aqueous solutions by charcoal modified with phosphoric acid used as a green biosorbent

Mansouri

Farissi

Cacciola

et al. 2022

Polymers for Advanced Techs

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Activated carbon modified by phosphoric acid noted CAa was successfully used as a new low‐cost adsorbent for removing Cu2+, Ni2+ and Cr6+ metal ions from artificially contaminated aqueous solutions. Experiments were performed in batches for adsorption kinetics and isotherms. Scanning electron microscope (SEM) observations as well as a nitrogen adsorption–desorption BET surface area measurement showed the formation of mesoporous CAa with an average pore size of 3.1 nm and a surface area of ABET = 678.74 m2 g−1. The adsorption data for Cu2+, Ni2+ and Cr6+ fitted well with Langmuir adsorption model with maximum adsorbed amount of 238.10 mg g−1 for Cu(II), 80.64 mg g−1 for Ni(II) and 125 mg g−1 of Cr(VI) with the maximal amount measured by N2 adsorption of 231.5337 cm3 g−1 STP. The experimental variables studied were pH, temperature, amount of biomass and initial ion concentration. Maximum biosorption was observed for pH = 2. The adsorption capacity seems to be optimized by increasing the temperature, the amount of biosorbent and the initial concentration. Isotherm adsorptions are in agreement with Langmuir models. The calculated changes in adsorption free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) confirm that the present adsorption process is a favorable, endothermic and spontaneous phenomenon.

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Section: Resultsmentioning

confidence: 87%

Rapid elimination of copper (II), nickel (II) and chromium (VI) ions from aqueous solutions by charcoal modified with phosphoric acid used as a green biosorbent

Mansouri

Farissi

Cacciola

et al. 2022

Polymers for Advanced Techs

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“…The residual concentrations of heavy metal ions were analyzed using atomic absorption spectrophotometer (AAS) and atomic fluorescence spectroscopy (AFS), and each experiment was repeated more than three times. The equilibrium adsorption capacity (q e ) and removal rate (R e ) of the three metal ions on nano TiO 2 -SH were calculated using the following equations: (Choi et al, 2020;Shi et al, 2022) Where the C o and C e (mmol L −1 ) are the initial concentration and equilibrium concentration of the testing metal ions, respectively. V (L) is the actual volume of the metal ions solution, and W (g) is the mass of the adsorbent.…”

Section: Adsorption Experimental Methodsmentioning

confidence: 99%

“…Kinetic models of the linear pseudo-first-order (PFO) and pseudo-second-order (PSO) rate laws were selected. (Choi et al, 2020;Shi et al, 2022).…”

Section: Pfo and Pso Equationmentioning

confidence: 99%

“…The adsorbents are roughly divided into five types: modified silicon-based materials, modified aluminum-based materials, modified manganesebased materials, modified carbon-based materials, and biological materials. (Choi et al, 2020;Xie et al, 2021;Chen et al, 2022;Shi et al, 2022;Xu et al, 2022). In recent years, nano titanium dioxide (nano TiO 2 ) materials have been used as adsorbent materials by many researchers due to their advantages of large specific surface area and porosity.…”

Section: Introductionmentioning

confidence: 99%

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Effective adsorption of heavy metal ions in water by sulfhydryl modified nano titanium dioxide

Chen

Li²,

Liu³

et al. 2023

Front. Chem.

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Background: The monitoring and removal of heavy metal ions in wastewater will effectively improve the quality of water and promote the green and sustainable development of ecological environment. Using more efficient adsorption materials and more accurate detection means to treat heavy metal ions in water has always been a research focus and target of researchers.Method: A novel titania nanomaterial was modified with sulfhydryl group (nano TiO2-SH) for detection and adsorption of heavy metal ions in water, and accurately characterize the adsorption process using Surface-Enhanced Raman Spectroscopy (SERS) and other effective testing methods.Results: The maximum adsorption efficiency of nano TiO2-SH for the Hg2+, Cd2+, Pb2+ three heavy metal ions reached 98.3%, 98.4% and 98.4% respectively. And more importantly, after five cycles of adsorption and desorption, the adsorption efficiency of nano TiO2-SH for these three metal ions is still above 96%.Conclusion: These results proved the nano TiO2-SH adsorbent has great potential in practical water pollution purification.

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“… Mugwar and Harbottle (2016) found that elevation of pH surrounding conditions and calcium carbonate precipitation is shown to be strongly linked to the removal of zinc and cadmium. Although a significant body of research has investigated the degree of urea hydrolysis and its link to remediation efficiency, how they vary with the effect of bacterial culture remains unclear ( Torres-Aravena et al, 2018 ; Seplveda et al, 2021 ; Shi et al, 2022 ). Furthermore, given that calcium source addition takes part in precipitating calcium carbonate, its implications on the ureolytic bacteria and urease activity are, however, rarely studied.…”

Section: Introductionmentioning

confidence: 99%

Effects of Bacterial Culture and Calcium Source Addition on Lead and Copper Remediation Using Bioinspired Calcium Carbonate Precipitation

Xue

Cheng

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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Lead and copper ions from wastewater induced by metallurgical processes are accumulated in soils, threatening plant and human health. The bioinspired calcium carbonate precipitation is proven effective in improving the cementation between soil particles. However, studies on capsulizing heavy metal ions using the bioinspired calcium carbonate precipitation are remarkably limited. The present study conducted a series of test tube experiments to investigate the effects of bacterial culture and calcium source addition on the remediation efficiency against lead and copper ions. The calcium carbonate precipitation was reproduced using the Visual MINTEQ software package to reveal the mechanism affecting the remediation efficiency. The degradation in the remediation efficiency against lead ions relies mainly upon the degree of urea hydrolysis. However, higher degrees of urea hydrolysis cause remediation efficiency against copper ions to reduce to zero. Such high degree of urea hydrolysis turns pH surrounding conditions into highly alkaline environments. Therefore, pursuing higher degrees of urea hydrolysis might not be the most crucial factor while remedying copper ions. The findings shed light on the importance of modifying pH surrounding conditions in capsulizing copper ions using the bioinspired calcium carbonate precipitation.

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Highly efficient and selective adsorption of heavy metal ions by hydrazide-modified sodium alginate

Cited by 92 publications

References 47 publications

Rapid elimination of copper (II), nickel (II) and chromium (VI) ions from aqueous solutions by charcoal modified with phosphoric acid used as a green biosorbent

Rapid elimination of copper (II), nickel (II) and chromium (VI) ions from aqueous solutions by charcoal modified with phosphoric acid used as a green biosorbent

Effective adsorption of heavy metal ions in water by sulfhydryl modified nano titanium dioxide

Effects of Bacterial Culture and Calcium Source Addition on Lead and Copper Remediation Using Bioinspired Calcium Carbonate Precipitation

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