Preparation of Hollow Polyaniline Micro/Nanospheres and Their Removal Capacity of Cr (VI) from Wastewater

Wu, Haixia; Wang, Qing; Fei, Guang Tao; Shao, Ximing; Guo, Xiao; Zhang, Li De

doi:10.1186/s11671-018-2815-8

Cited by 18 publications

(12 citation statements)

References 38 publications

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“…Inversely, CrO 4 2− in alkaline solution is hard to be reduced to Cr(III) due to the lower redox potential [ 35 , 39 ], and it would cause a lower removal capacity of PANI/m-FB composites as pH value increases. The transformation of Cr(VI) can be seen as follows [ 5 , 16 ]: …”

Section: Resultsmentioning

confidence: 99%

Synthesis of Polyaniline Coating on the Modified Fiber Ball and Application for Cr(VI) Removal

2021

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In this study, polyaniline (PANI) is prepared by means of chemical oxidization polymerization and directly loaded on the modified fiber ball (m-FB) to obtain macroscale polyaniline/modified fiber ball (PANI/m-FB) composite, and then its removal ability of Cr(VI) is investigated. The effects of different parameters such as contact time, pH value and initial concentration on Cr(VI) removal efficiency are discussed. The experimental results illustrate that the favorable pH value is 5.0 and the maximum removal capacity is measured to be 293.13 mg g−1. Besides, PANI/m-FB composites can be regenerated and reused after being treated with strong acid. The kinetic study indicates that the adsorption procedure is mainly controlled by chemical adsorption. More importantly, the macroscale of composites can avoid secondary pollution efficiently. Benefiting from the low cost, easy preparation in large scale, environmentally friendly, excellent recycling performance as well as high removal ability, PANI/m-FB composites exhibit a potential possibility to remove Cr(VI) from industrial waste water. Graphic Abstract The polyaniline (PANI) was coated on modified fiber ball (m-FB) to remove Cr(VI) in waste water, and this kind of PANI/m-FB composites can avoid secondary pollution efficiently due to its macrostructure. Furthermore, the removal capacity can reach to 291.13 mg/g and can be multiple reused.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Polyaniline Coating on the Modified Fiber Ball and Application for Cr(VI) Removal

2021

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“…Inversely, CrO4 2in alkaline solution is hard to be reduced to Cr(III) due to the lower redox potential [39,35], and it would cause a lower removal capacity of PANI/m-FB composites as pH value increases. The transformation of Cr(VI) can be seen as follows [5,16]:…”

Section: Resultsmentioning

confidence: 99%

“…(pH between 5.5 and 7.0) form as pH increases [11]. That means when pH is below 4.0, the reduced Cr(III) dominantly existed in Cr 3+ form with 3 positive charges, which is unfavourable to be adsorbed because the increase of electrostatic repulsion between Cr 3+ and protonated PANI would overcome the chelation interaction between Cr 3+ and PANI [16]. However, as pH value increases to 5.0, the electrostatic repulsion between the PANI/m-FB composites and Cr(III) is decreased gradually due to the decrease amount of positive charges in the form of Cr(III), and it would cause a little effect on chelation interaction, which is considered as the main factor to adsorb reduced Cr(III) in acid solution.…”

Section: Resultsmentioning

confidence: 99%

“…For one thing, this may be due to the limitation of active adsorption sites on the surface of PANI/m-FB composites. In the case of high initial concentration of Cr(VI), there are not enough adsorption sites for PANI/m-FB composites to adsorb and reduce Cr(VI) anymore [16]. For another, due to the high initial concentration of Cr(VI), protonated emeraldite salt has been completely oxidized to pernigraniline base which loses the ability to reduce Cr(VI) [40].…”

Section: Resultsmentioning

confidence: 99%

“…So, there have been a great deal of research towards the use of PANI for Cr(VI) removal due to its easy synthesis, low cost, remarkable environmental stability and reversibility [11][12][13]. Up to now, people have fabricated various morphologies of polyaniline like polyaniline films, polyaniline nanowires, polyaniline-based composites and so on [11,[14][15][16][17][18]. Whereas, there are still many problems desiring to be solved.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of polyaniline coating on the modified fiber ball and application for Cr(VI) removal

Fei

Shao

2021

Preprint

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In this study, polyaniline (PANI) is prepared by means of chemical oxidization polymerization and directly loaded on the modified fiber ball (m-FB) to obtain macroscale polyaniline/modified fiber ball (PANI/m-FB) composite, and then its removal ability of Cr(VI) is investigated. The effects of different parameters such as contact time, pH value and initial concentration on Cr(VI) removal efficiency are discussed. The experimental results illustrate that the favourable pH value is 5.0 and the maximum removal capacity is measured to be 293.13 mg·g-1. Besides, PANI/m-FB composites can be regenerated and reused after being treated with strong acid. The kinetic study indicates that the adsorption procedure is mainly controlled by chemical adsorption. More importantly, the macroscale of composites can avoid secondary pollution efficiently. Benefiting from the low cost, easy preparation in large scale, environmentally friendly, excellent recycling performance as well as high removal ability, PANI/m-FB composites exhibit a potential possibility to remove Cr(VI) from industrial waste water.

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Synthesis of hollow spherical polyaniline by using poly(styrene‐co‐acrylic acid) sphere as the template for high adsorption of Cr(VI)

Chang

Meng

Liu

et al. 2022

J of Applied Polymer Sci

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Synthesis of hollow spherical polyaniline (HSPANI) with the merits of facile strategy, low cost, low safety risk and high adsorption capacity of Cr(VI) is always a big challenge. In this manuscript, we proposed a facile way to preparation of HSPANI by using the poly(styrene‐co‐acrylic acid) sphere as template. The results indicated that HSPANI was emeraldine comprised of lots of basically uniform hollow spheres, and its average pore diameter was about 300 nm. HSPANI displayed high adsorption capacity of Cr(VI), and its value arrived at 601.3, 347.8, 235 mg g−1 at pH = 1, 2, and 3, respectively, which were high than many other adsorbents. The endothermic, spontaneous and chemical adsorption process was responsible for this adsorption. The Cr(VI) adsorption capacity was significant relied on its pH, contact time, Cr(VI) concentration and adsorption temperature. The adsorption behavior was well agreed with pseudo second‐order equation and Redlich–Peterson isotherm models. HSPANI exhibited remarkable selectivity for adsorption of Cr(VI) even if the K+, Cu2+, NO3− and SO42− were coexisted. HSPANI also displayed excellent regeneration performance. Therefore, this work not only provided a facile way to synthesis of hollow spherical polyaniline, but also supplied a potential adsorbent for adsorption of Cr(VI) from the industrial wastewater.

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Preparation of Hollow Polyaniline Micro/Nanospheres and Their Removal Capacity of Cr (VI) from Wastewater

Cited by 18 publications

References 38 publications

Synthesis of Polyaniline Coating on the Modified Fiber Ball and Application for Cr(VI) Removal

Synthesis of Polyaniline Coating on the Modified Fiber Ball and Application for Cr(VI) Removal

Synthesis of polyaniline coating on the modified fiber ball and application for Cr(VI) removal

Synthesis of hollow spherical polyaniline by using poly(styrene‐co‐acrylic acid) sphere as the template for high adsorption of Cr(VI)

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