Ultrahigh adsorption capacities for anionic and cationic dyes from wastewater using only chitosan

Ma, Hongwen; Kong, Aiqun; Ji, Yanhong; He, Benqiao; Song, Yunfei; Li, Jianxin

doi:10.1016/j.jclepro.2018.12.217

Cited by 126 publications

(33 citation statements)

References 32 publications

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“…The optimum removal rate ( R > 99.2%) was achieved when the flocculant dose was 32.5 mg·L −1 , and the ZP of the solution approached zero at that concentration, indicating that the negative charges of the dye were completely neutralized by the flocculant, resulting in a high removal rate. When the optimum concentration was exceeded, the existence of superfluous protonated amine groups on the flocculant led to restabilization of the suspension [21], which caused a lower removal rate and higher ZP. The effects of the flocculant concentration on the flocculation capacity are shown in Figure 1b.…”

Section: Resultsmentioning

confidence: 99%

Flocculant-Assisted Synthesis of Graphene-Like Carbon Nanosheets for Oxygen Reduction Reaction and Supercapacitor

et al. 2019

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The rational treatment of hazardous textile sludge is critical and challenging for the environment and a sustainable future. Here, a water-soluble chitosan derivative was synthesized and used as an effective flocculant in removal of reactive dye from aqueous solution. Employing these chitosan-containing textile sludges as precursors, graphene-like carbon nanosheets were synthesized through simple one-step carbonization with the use of Fe (III) salt as graphitization catalyst. It was found that the resultant graphene-like carbon nanosheets material at thickness near 3.2 nm (NSC-Fe-2) showed a high graphitization degree, high specific surface area, and excellent bifunctional electrochemical performance. As-prepared NSC-Fe-2 catalyst exhibited excellent oxygen reduction reaction (ORR) activity (onset potential 1.05 V) and a much better methanol tolerance than that of commercial Pt/C (onset potential 0.98 V) in an alkaline medium. Additionally, as electrode materials for supercapacitors, NSC-Fe-2 also displayed an outstanding specific capacitance of 195 F g−1 at 1 A g−1 and superior cycling stability (loss of 3.4% after 2500 cycles). The good electrochemical properties of the as-prepared NSC-Fe materials could be attributed to the ultrathin graphene-like nanosheets structure and synergistic effects from codoping of iron and nitrogen. This work develops a simple but effective strategy for direct conversion of textile sewage sludge to value-added graphene-like carbon, which is considered as a promising alternative to fulfill the requirements of environment and energy.

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Section: Resultsmentioning

confidence: 99%

Flocculant-Assisted Synthesis of Graphene-Like Carbon Nanosheets for Oxygen Reduction Reaction and Supercapacitor

et al. 2019

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“…Penanggulangan masalah limbah zat pewarna baik secara fisika maupun kimia telah banyak dilakukan dan dilaporkan seperti adsorpsi, filtrasi dan elektrolisis. Adsorpsi merupakan salah satu metode penyerapan fluida, cairan maupun gas dimana zat terserap (adsorbat) terikat oleh zat penyerap (adsorben) pada permukaannya, metode ini telah dilakukan oleh (Guo et al, 2019), (Eletta et al, 2018), (Abd-Elhamid et al, 2019), (Minisy et al, 2019), (Rana et al, 2019), (Adeyi et al, 2019), (FBA & M, 2016), (Ismail et al, 2019), (Hariani et al, 2019), (Fabbricino & Pontoni, 2016), (Huang et al, 2017), (Yin et al, 2017), (Ma et al, 2019), (Sharma et al, 2019). Filtrasi adalah suatu proses pemisahan dengan menggunakan media penyaringan yang menghasilkan filtrat dan residu (ampas), metode ini telah dilakukan oleh (Long et al, 2017), (Gunasegaran et al, 2020), (Zeng et al, 2017), (Kiswanto et al, 2019), (Komala et al, 2019), (Pratiwi & Gunawan, 2018), (Pramitasari, 2017).…”

Section: A Pendahuluanunclassified

“…Filtrasi adalah suatu proses pemisahan dengan menggunakan media penyaringan yang menghasilkan filtrat dan residu (ampas), metode ini telah dilakukan oleh (Long et al, 2017), (Gunasegaran et al, 2020), (Zeng et al, 2017), (Kiswanto et al, 2019), (Komala et al, 2019), (Pratiwi & Gunawan, 2018), (Pramitasari, 2017). Elektrolisis adalah suatu proses pemisahan dengan menggunakan elektroda dimana terdapat dua sisi yaitu anoda dan katoda, metode ini telah dilakukan oleh (Arif & Malik, 2017), (Singh et al, 2017), (Setianingrum et al, 2018), (Bachtiar & Setiyo, 2015), (Darmawanti et al, 2010), (Triavia et al, 2016), (Haryono et al, 2018) (Guo et al, 2019); 0,5-2,5 g (Eletta et al, 2018); 25-100 mg (Abd-Elhamid et al, 2019); 50 mg (Minisy et al, 2019); 0,5-2 g (Rana et al, 2019); 0,3-0,5 g (Adeyi et al, 2019); 0,5-2,5 g (FBA & M, 2016); 0,2-1 g (Ismail et al, 2019); 0,1 g (Hariani et al, 2019); 1,7-3,2 mg (Fabbricino & Pontoni, 2016); 0,04-1 g (Huang et al, 2017); 25-50 mg (Yin et al, 2017); 0,01-0,3 g (Ma et al, 2019); 12,5-100 g (Sharma et al, 2019).…”

Section: A Pendahuluanunclassified

Studi Literatur Pengolahan Warna pada Limbah Cair Industri Tekstil Menggunakan Metode Proses Adsorpsi, Filtrasi, dan Elektrolisis

Sausan

Puspitasari

2021

TECNOSCIENZA

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Warna pada limbah cair indusri tekstil dihasilkan berasal proses pewarnaan. Limbah cair yang berwarna ini jika di buang langsung akan menghambat proses transfer oksigen dibadan air. Tujuan dari studi literatur ini adalah mengetahui waktu kontak dan media penyerap yang terbaik pada metode adsorpsi, filtrasi dan elektrolisis dalam pengolahan warna pada limbah cair industri tekstil. Metode adsorpsi, filtrasi dan elektrolisis adalah metode yang sering digunakan pada pengolahan warna pada limbah cair industri tekstil. Berdasarkan studi literatur yang telah dilakukan didapatkan hasil waktu kontak optimum dan media penyerap yang terbaik pada metode adsorpsi menggunakan media penyerap biosorben selama 30 menit mampu menyerap warna dengan efesiensi penyerapan 99,9%, metode filtrasi menggunakan media penyerap membran nanofiltrasi selama 480 menit mampu menyerap warna dengan efesiensi penyerapan 99,9% dan meode elektrolisis menggunakan media penyerap elektroda PbO2, Al, C selama 120 menit mampu menyerap warna dengan efesiensi penyerapan 99,78%. Kata kunci: Zat warna, Limbah Cair Industri Tekstil, Adsorpsi, Filtrasi, Elektrolisis, Persen Removal Warna

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“…Its comparatively low-cost, non-toxicity, ease of degradation, good biocompatibility, rich resources, and hydrophilicity make it a useful water treatment agent [6]. Chitosan has great hydroxyl numbers and amino compounds that enhance its ability to absorb metal ions like Cr, Pb, Cu, Ni, and Zu [7]. Also, it has a malleable polymer structure that increases metal ions' complexation.…”

Section: Introductionmentioning

confidence: 99%

Removal of Direct Yellow 50 From Aqueous Solutions Using Chitosan-ISO-Vanillin Derivatives Chelating Polymers

Alabbad

2020

Preprint

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Background Water contamination has increasingly become a significant problem affecting the welfare of living organisms perceived to be aquatic beneficiaries. The nature and origin of the contaminant always determines the purification techniques. The most common contaminants in wastewater include organic compounds such as dyes that must be eliminated to enhance water purity and safety.Result The results indicate that the removal of DY50 by the modified chitosan was affected by the solution pH, sorbent dosage, initial DY50 concentration, contact time, and temperature. The experimental data were fitted to the Langmuir, Freundlich, and Temkin isotherms, and Langmuir isotherm showed the best fit. The kinetic data were fitted to the pseudo-first-order and pseudo-second-order rate equations. The removal rate was 97.9% by chemisorption components after the three hours at about 0.05 g of sorbent dose and 100 ppm of the Direct Yellow 50 dye initial concentration. The adsorption behavior of the modified chitosan for the removal of DY50 was well-described using the pseudo-second-order kinetic model, Intraparticle diffusion analysis was also conducted. The thermodynamic properties such as free energy (∆G), enthalpy (∆H), and entropy (∆S), in addition to the intra-particle diffusion rate were similarly defined.Conclusion The pH, initial DY50 concentration, sorbent dosage, adsorption temperature, and contact time had a significant effect on the adsorption of DY50 by chitosan-iso-vanillin.

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Ultrahigh adsorption capacities for anionic and cationic dyes from wastewater using only chitosan

Cited by 126 publications

References 32 publications

Flocculant-Assisted Synthesis of Graphene-Like Carbon Nanosheets for Oxygen Reduction Reaction and Supercapacitor

Flocculant-Assisted Synthesis of Graphene-Like Carbon Nanosheets for Oxygen Reduction Reaction and Supercapacitor

Studi Literatur Pengolahan Warna pada Limbah Cair Industri Tekstil Menggunakan Metode Proses Adsorpsi, Filtrasi, dan Elektrolisis

Removal of Direct Yellow 50 From Aqueous Solutions Using Chitosan-ISO-Vanillin Derivatives Chelating Polymers

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