Acid-vacuo heat treated low cost banana stems fiber for efficient biosorption of Hg(ii)

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14129-14137 ◽  
Author(s):  
N. Salamun ◽  
S. Triwahyono ◽  
A. A. Jalil ◽  
T. Matsuura ◽  
N. F. M. Salleh
Keyword(s):  
Low Cost ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Cellulose Accessibility ◽  
Heat Treated ◽  
Banana Stem

HCl treatment on Banana Stem Fiber (BSF) increased the cellulose accessibility. Prior to the biosorption process, the biosorbent was activated in vacuo at 373 K. The activation improved the maximum Hg(ii) biosorption capacity from 28 to 372 mg g−1.

Comparative Study of Removal of Cadmium (II) and Chromium (III) Ions from Aqueous Solution Using Low-Cost Biosorbent

2014 ◽  
Vol 12 (1) ◽  
pp. 477-486 ◽  
Author(s):  
Abbas H. Sulaymon ◽  
Ahmed A. Mohammed ◽  
Tariq J. Al-Musawi
Keyword(s):  
Ph Value ◽  
Removal Rate ◽  
Low Cost ◽  
Order Kinetic ◽  
Cadmium Removal ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Batch Biosorption

Abstract This study aims to evaluate the ability of abundant low-cost garden grass to remove cadmium and chromium ions from aqueous solutions. Batch biosorption studies were carried out to examine the biosorption capacity, pH value, temperature, agitation speed, and metal ions concentration. The biosorption process revealed that the garden grass was an effective biosorbent of cadmium and chromium. The maximum chromium and cadmium removal rate was 90 and 80% at pH 4, respectively. FTIR spectroscopy analysis showed that the hydroxyl, amine, and carboxyl groups were the major groups responsible for the biosorption process. The maximum biosorption capacity was 18.19 and 19.4 mg/g for cadmium and chromium, respectively. The biosorption isotherm data fitted well the Langmuir model. Kinetic data were adequately fitted by the pseudo-second-order kinetic model.

scholarly journals Biosorption of Hexavalent Chromium from Aqueous Medium withOpuntiaBiomass

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
José A. Fernández-López ◽  
José M. Angosto ◽  
María D. Avilés
Keyword(s):  
Hexavalent Chromium ◽  
Low Cost ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Equilibrium Data ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Two Parameter

The biosorption of hexavalent chromium from aqueous solutions byOpuntiacladodes and ectodermis from cactus fruits was investigated. Both types of biomass are considered low-cost, natural, and ecofriendly biosorbents. Batch experiments were carried out to determine Cr(VI) biosorption capacity and the efficiency of the biosorption process under different pH, initial Cr(VI) concentration, and sorbent dosage. The biosorption of Cr(VI) byOpuntiabiomass was highly pH dependent, favoring higher metal uptake at low pH. The higher biosorption capacity was exhibited at pH 2. The optimal conditions were obtained at a sorbent dosage of 1 g L−1and initial metal concentration of 10 mg L−1. Biosorption kinetic data were properly fitted with the pseudo-second-order kinetic model. The rate constant, the initial biosorption rate, and the equilibrium biosorption capacity were determined. The experimental equilibrium data obtained were analyzed using two-parameter isotherm models (Langmuir, Freundlich, and Temkin). The Langmuir maximum monolayer biosorption capacity (qmax) was 18.5 mg g−1for cladodes and 16.4 mg g−1for ectodermis. The results suggest thatOpuntiabiomass could be considered a promising low-cost biosorbent for the ecofriendly removal of Cr(VI) from aqueous systems.

Pemanfaatan Cangkang Pensi (Corbicula Moltkiana) sebagai Bahan Penyerap Zat Warna Rhodamin B Dalam Larutan

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Rahmiana Zein ◽  
Mutia Khuratul Aini ◽  
Hermansyah Aziz
Keyword(s):  
Rhodamine B ◽  
Sem Analysis ◽  
Spectra Analysis ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Langmuir Isotherm Model ◽  
Ft Ir ◽  
Cationic Exchange ◽  
Rhodamin B ◽  
Model Isotherm

Biosorpsi zat warna Rhodamine B menggunakan cangkang Pensi (Corbicula moltkiana) telah dikaji. Percobaan dilakukan dengan system batch guna memperoleh kondisi optimum biosorspi zat warna. Kapasitas biosorpsi zat warna pada pH 2 adalah 0.9958 mg/g, dengan konsentrasi larutan mula-mula 150 mg/L waktu kontak 105 menit, massa biosorben 0.1 g, ukuran partikel 32 µm dan temperature pengeringan biosorben pada 75oC. Model isotherm Langmuir menunjukkan bahwa proses penyerapan berlangsung secara kimia dan biosorpsi homogeny dari adsorbat (Rhodamine B) pada permukaan biosorben membentuk lapisan tunggal dengan nilai R2 0.9966. Analisis XRF menunjukkan bahwa penurunan kadar unsur logam pada cangkang Pensi membuktikan bahwa proses biosorpsi berlangsung dengan pertukaran kation. Hasil analisis spektrum FT-IR membuktikan adanya interaksi antaramolekul Rhodamin B dengan gugus fungsi pada cangkang Pensi. Analisis dengan SEM memperlihatkan bahwa pori-pori cangkang Pensi telah terisi penuh oleh molekul Rhodamin B. Kondisi optimum biosorpsi telah diaplikasikan pada limbah kerupuk merah dengan kapasitas penyerapan sebesar 0,2835 mg/g.   The biosorption of Rhodamine B dyes by Pensi (Corbicula moltkiana) shell has been investigated. The experiment was conducted in batch sistem in order to obtain the optimum conditions of dye biosorption. Biosorption capacity of dye was 0.9958 mg/g at pH 2, initial concentration 150 mg/L, contact time 105 minutes, biosorbent mass 0.1 gram, particle size 32 µ m and biosorbent drying temperature was at 75oC. The Langmuir Isotherm model showed chemisorption and homogeneous biosorption process of adsorbates onto the biosorbent surface formed monolayer dye molecules on the biosorbent surface with R2 value was 0.9966. XRF analysis showed that reduction of metals unsure quantity of pensi shell indicated biosorption process was occupied through cationic exchange. The result of FTIR spectra analysis indicated an interaction between Rhodamin B molecules and functional group of pensi shell. SEM analysis showed that the pensi shell pores were completely filled by Rhodamine B molecules. The optimum condition of biosorption has been aplicated in red chips wastewater industry with biosorption capacity was 0.2835 mg/g.

scholarly journals From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 279 ◽  
Author(s):  
Marija Stjepanović ◽  
Natalija Velić ◽  
Antonela Galić ◽  
Indira Kosović ◽  
Tamara Jakovljević ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Congo Red ◽  
Contact Time ◽  
Synthetic Wastewater ◽  
Wood Biomass ◽  
Waste Wood ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Cr Concentration ◽  
Cr Removal

The aim of the study was to screen the waste wood biomass of 10 wood species as biosorbents for synthetic dye Congo Red (CR) removal from water and to single out the most efficient species for further batch biosorption experiments. Euroamerican poplar (EP), the most efficient species achieving 71.8% CR removal and biosorption capacity of 3.3 mg g−1, was characterized by field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FTIR). Different factors affecting the biosorption process were investigated: initial biosorbent concentration (1–10 g dm−3), contact time (5–360 min), initial CR concentration (10–100 mg dm−3), and the initial pH (pH = 4–9). The results showed that CR removal efficiency increased with the increase of biosorbent concentration and contact time. Increase of initial CR concentration led to an increase of the biosorption capacity, but also a decrease of CR removal efficiency. The highest CR removal efficiency was achieved at pH = 4, while at pH = 9 a significant decrease was noticed. The percentage of CR removal from synthetic wastewater was 18.6% higher than from model CR solution. The Langmuir model fitted well the biosorption data, with the maximum biosorption capacity of 8 mg g−1. The kinetics data were found to conform to the pseudo-second-order kinetics model.

Structure, morphology features and photocatalytic properties of α-Ag2WO4 nanocrystals-modified Palygorskite clay

2021 ◽  
Vol 02 ◽  
Author(s):  
Amanda Carolina Soares Jucá ◽  
Francisco Henrique Pereira Lopes ◽  
Herbert Vieira Silva-Júnior ◽  
Lara Kelly Ribeiro Silva ◽  
Elson Longo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Degradation Kinetics ◽  
Low Cost ◽  
Catalytic Efficiency ◽  
Photocatalytic Properties ◽  
Impregnation Method ◽  
Heat Treated ◽  
Modified Palygorskite

Aims: In the present study, we investigate the photocatalytic properties of α-Ag2WO4 nanocrystals-modified Palygorskite (PAL) clay synthesized by the impregnation method. The PAL clay was chemically purified and heat-treated (500 ºC for 2 h), which served as an excellent supporting matrix for loading α-Ag2WO4(α-AWO) nanocrystals. Background: Water contamination is one of the most serious problems affecting human health, ecosystem survival, and the economic growth of societies. Industrial effluents, such as textile dyes, when not treated and improperly discharged into water resources are considered the main cause of water pollution. Thus the scientific community has been developing effective remediation technologies based on advanced oxidative processes to reduce the harmful effects of these organic pollutants. Objective: Improve the photocatalytic activity of PAL clay with α-AWO nanocrystals to degradation of Rhodamine B (RhB) dye. Methods: We purify and heat-treated the PAL clay, synthesize nanocrystals ofα-AWO nanocrystals and modify PAL clay with 30% α-AWO nanocrystals by the impregnation method. The modified PAL clay was able to improve RhB dye degradation. The materials were characterized by XRD, RAMAN,FE-SEM, FT-IR, XRF, etc. The samples were used as photocatalysts under UV-C lamps for the degradation of RhB dye in order to analyze its catalytic performances. Results: ThePAL clay modified with 30% α-AWO nanocrystals showed a catalytic efficiency of 79%, and degradation kinetics about 16 times higher when compared to PAL-500 only purified and heat-treated at 500 ºC. In this way, this PAL-modified is an alternative as a low-cost photocatalyst for the degradation of RhB dye. Conclusion: Ultraviolet-Visiblespectra revealed that our materials have opticalband gap energies controlled by indirect and direct electronic transitions and suitable to be activated under ultraviolet illumination. The adequate amount (30 wt.%) of α-Ag2WO4 nanocrystals added to PAL brought significant improvement of photocatalytic activity for the degradation of rhodamine B. Finally, a photocatalytic mechanism was proposed in detail.

ZIRCONIUM LOADED BANANA STEM FIBERS AS ADSORBENT FOR RECOVERY OF HG(II)

2016 ◽  
Vol 78 (8-3) ◽  
Author(s):  
Nurrulhidayah Salamun ◽  
Sugeng Triwahyono ◽  
Aishah Abdul Jalil
Keyword(s):  
Heavy Metals ◽  
Aquatic Environment ◽  
Active Sites ◽  
Low Cost ◽  
Mercury Removal ◽  
Cellulose I ◽  
Xrd Pattern ◽  
Crystal Phases ◽  
Good Possibility ◽  
Banana Stem

Mercury is one of the most toxic pollutants which pose a great threat to both human health and organism security. A great deal of research over recent decades has been motivated by the requirement to lower the concentration of these heavy metals in water and the need to develop low cost techniques which can be widely applied for heavy metals remediation. Adsorption is by far the most reliable technologies for removing mercury from water. In this study, banana stem fibers, a natural biomass was loaded with zirconium (IV) to investigate its feasibility for mercury removal from an aquatic environment. The XRD pattern for both BSF-HCl and Zr/BSF-HCl exhibited mainly the cellulose I structure which consists of two distinct crystal phases. The FESEM images illustrated the presence of relatively well organized, pronounced and uniform cavities distributed around the surface, indicated a good possibility for the metal ions to be adsorbed. The result shows that Hg (II) adsorption capacity increased from 45 to 72 mg/g after the immobilization of Zr due to increase in the active sites on the adsorbent. 

scholarly journals Development of α+β-type biomedical Ti–Nb alloys with high oxygen content

2020 ◽  
Vol 321 ◽  
pp. 05003
Author(s):  
K. Ueda ◽  
M. Omiya ◽  
Y. Hirose ◽  
T. Narushima
Keyword(s):  
Oxygen Content ◽  
Low Cost ◽  
Total Elongation ◽  
Ti Alloy ◽  
High Oxygen Content ◽  
Β Phase ◽  
Α Phase ◽  
Heat Treated ◽  
Iced Water ◽  
Nb Content

Ti-(5–20)Nb-(0.5–1)O alloys (mass%) were investigated for developing low-cost biomedical α+β-type Ti alloy. Ti-(5, 10, 15, 20)Nb-(0.5, 0.75, 1)O alloys (mass%) were arc-melted and forged into bars. The forged alloy bars were heat-treated at 873 to 1373 K for 3.6 ks in an Ar atmosphere and quenched in iced water. β transus (Tβ) of the Ti-Nb-O alloys decreased with increasing Nb content. An increase in the oxygen content led to an increase in Tβ. After quenching, the formation of α′ martensite was observed in Ti-5Nb-yO alloys. An increase in the Nb content to 10 mass% led to the formation of α′ and α″ martensites. A further increase in the Nb content to 15 and 20mass% resulted in the formation of more α″ martensites. The boundary temperature for the formation of α′ and α″ martensite in the Ti-10Nb-yO alloys increased with increasing oxygen content, because oxygen enhances the Nb distribution to the β phase. The ultimate tensile strength of the Ti-xNb-0.75O alloys heattreated to obtain the α-phase fraction (fα) of 0.5 was over 1000 MPa, except for the Ti-15Nb-0.75O alloy. The total elongation decreased with increasing Nb content. The Ti-5Nb-0.75O alloy exhibited excellent strength-ductility balance as a low-cost α+β-type biomedical Ti alloy.

scholarly journals BIOSORPTION OF METHYLENE BLUE BY WASTE APRICOT SHELLS FROM FOOD INDUSTRY

2018 ◽  
Vol 4 (7) ◽  
Author(s):  
Tatjana Šoštarić ◽  
Marija Petrović ◽  
Jelena Milojković ◽  
Jelena Petrović ◽  
Marija Stanojević ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Food Industry ◽  
Fruit Juice ◽  
Waste Waters ◽  
Batch Experiments ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Monolayer Adsorption

In this paper, the removal of methylene blue (MB) from aqueous solution by biosorption ontoapricot shellshas been investigated through batch experiments. Apricot shells were chosen as alocally available and abundant waste from fruit juice industry. Methylene blue is common pollutantof waste waters from textile industry.The influence of initial MB concentration on biosorption process has been studied. Theexperimental data have been analysed using Langmuir and Freundlichisotherm models. TheLangmuir model better fits to experimental data, which explain monolayer adsorption. Maximumbiosorption capacity is 24,31 mg/g. A comparison of the biosorption capacity of waste apricot shellswith biosorption capacities of similar adsorbents previously investigated indicates that apricotshells could be a promising biosorbent for removal of MB from aqueous solution.

scholarly journals Effect of pH on Biosorption Ion Cd(II) in Solutions using Lengkuas Merah (Alpinia Gralanga)

2018 ◽  
Vol 1 (1) ◽  
pp. 31
Author(s):  
Ahmad Faris Fauzi ◽  
Lisa Utami
Keyword(s):  
Waste Water ◽  
Aqueous Solution ◽  
Low Cost ◽  
Effect Of Ph ◽  
Biosorption Capacity ◽  
Optimum Ph

The biosorption characteristic of Cd(II) ions from aqueous solution using Lengkuas Merah (Alpinia Gralanga) were investigated as a function of pH. The maximum biosorption capacity of a Lengkuas Merah (Alpinia Gralanga) for Cd(II) was found to be 18,37 mg/L and 91,85% at optimum pH was 10. At pH 2 to 10 the biosorption of Cd ions tends to increase. The result showed that the lengkuas merah  can be evaluated as an alternative biosorbent to treatment waste water containing Cd(II). A Lengkuas Merah is low cost and has considerable high biosorption capacity.

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