Comparison of malachite green adsorption by two yeast strains using Raman microspectroscopy

2019 ◽  
Vol 366 (13) ◽  
Author(s):  
Jinghua Liu ◽  
Dongchen Zha ◽  
Xinyi Chen ◽  
Yin Wang ◽  
Zihang Wang ◽  
...  
Keyword(s):  
Malachite Green ◽  
Dye Removal ◽  
Environmental Concern ◽  
Health Hazard ◽  
Industrial Effluents ◽  
Raman Microspectroscopy ◽  
Operational Conditions ◽  
Yeast Strains ◽  
Batch Biosorption

ABSTRACT Malachite green (MG), as a triarylmethane compound, poses a health hazard and causes considerable environmental concern. In this work, batch biosorption experiments were conducted under different operational conditions such as pH, contact time and adsorption dose to assess the optimal parameters of MG dye removal by yeast biomass from aqueous solutions. Then, the conventional biochemical assay was used to evaluate MG removal efficiency (75.18 and 95.85%) by Saccharomyces cerevisiae and Candida utilis. In addition, Fourier-transform infrared spectroscopy in combination with Raman microspectroscopy was employed to scrutinize the differences of dye removal between two types of yeast strains. This study demonstrates that Raman microspectroscopy may serve as a useful and powerful tool to quantitatively measure the content of MG dye on yeast cell surfaces in situ, and even offer an alternative new technique to seek potentially proper adsorbents for the removal of toxic dyes from industrial effluents.

scholarly journals Coconut shell derived ZnCl2 activated carbon for malachite green dye removal

2021 ◽  
Author(s):  
R. Sangeetha piriya ◽  
Rajamani M. Jayabalakrishnan ◽  
M. Maheswari ◽  
Kovilpillai Boomiraj ◽  
Sadish Oumabady
Keyword(s):  
Activated Carbon ◽  
Malachite Green ◽  
Zinc Chloride ◽  
Dye Removal ◽  
Dye Adsorption ◽  
Freundlich Isotherm ◽  
Industrial Effluents ◽  
Intraparticle Diffusion Model ◽  
Malachite Green Dye ◽  
The Impact

Abstract The coconut-based agricultural wastes have gained wide attention as an alternative adsorbent for the removal of diverse pollutants from the industrial effluents. This paper presents the zinc chloride activation of adsorbent carbon and the utilization as an adsorbent for the removal of malachite green dye from aqueous solution. The characterisation of activated carbon was performed to get an insight into the adsorption mechanism. The ZnCl2 activated carbon acquired a higher specific surface area (544.66 m2 g−1) and stability (−32.6 mV). The impact of process parameters including contact time (20–220 min) and initial dye concentration (20–80 mg L−1) were evaluated on the effectiveness of activated carbon for dye removal. The results concluded that zinc chloride activated carbon showed a significant dye adsorption (39.683 mg g−1) at an initial concentration of 20 mg L−1 after 3 hours. Based on the correlation coefficient (R2), the Freundlich isotherm model (0.978–0.998) was best fitted for the experimental data followed by the intraparticle diffusion model (0.88–0.929) as the most appropriate model for malachite green dye removal. Additionally, the energy and thermogravimetric analysis portrayed the suitability of the carbon material to be used as an energy alternative to coal.

scholarly journals Removal of Methylene Blue and Congo Red Using Adsorptive Membrane Impregnated with Dried Ulva fasciata and Sargassum dentifolium

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 384
Author(s):  
Ahmed Labena ◽  
Ahmed E. Abdelhamid ◽  
Abeer S. Amin ◽  
Shimaa Husien ◽  
Liqaa Hamid ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Removal Efficiency ◽  
Congo Red ◽  
Dye Removal ◽  
Industrial Effluents ◽  
Composite Membranes ◽  
Acrylic Fiber ◽  
Ulva Fasciata ◽  
Ft Ir ◽  
Sorption Time

Biosorption is a bioremediation approach for the removal of harmful dyes from industrial effluents using biological materials. This study investigated Methylene blue (M. blue) and Congo red (C. red) biosorption from model aqueous solutions by two marine macro-algae, Ulva fasciata and Sargassum dentifolium, incorporated within acrylic fiber waste to form composite membranes, Acrylic fiber-U. fasciata (AF-U) and Acrylic fiber-S. dentifolium (AF-S), respectively. The adsorption process was designed to more easily achieve the 3R process, i.e., removal, recovery, and reuse. The process of optimization was implemented through one factor at a time (OFAT) experiments, followed by a factorial design experiment to achieve the highest dye removal efficiency. Furthermore, isotherm and kinetics studies were undertaken to determine the reaction nature. FT-IR and SEM analyses were performed to investigate the properties of the membrane. The AF-U membrane showed a significant dye removal efficiency, of 88.9% for 100 ppm M. blue conc. and 79.6% for 50 ppm C. red conc. after 240 min sorption time. AF-S recorded a sorption capacity of 82.1% for 100 ppm M. blue conc. after 30 min sorption time and 85% for 100 ppm C. red conc. after 240 min contact time. The membranes were successfully applied in the 3Rs process, in which it was found that the membranes could be used for five cycles of the removal process with stable efficiency.

scholarly journals Methodology for determining rom size distribution

2014 ◽  
Vol 67 (4) ◽  
pp. 405-412
Author(s):  
Christiane Ribeiro da Silva ◽  
Vládia C. G. de Souza ◽  
Jair C. Koppe
Keyword(s):  
Size Distribution ◽  
Distribution Curve ◽  
Size Distributions ◽  
Sampling Protocol ◽  
Product Size ◽  
Operational Conditions ◽  
Specific Protocol ◽  
Open Side ◽  
Ore Dressing

A methodology to determine the size distribution curve of the ROM was developed in a Brazilian iron ore mine. The size of the larger fragments was determined taking photographs and setting the scale of the images to analyze their dimensions (length of their edges and areas). This was implemented according to a specific protocol of sampling that involves split and homogenization stages in situ of a considerable quantity of ore (about 259 metric tonnes). During the sampling process, larger fragments were separated and smaller size material was screened. The methodology was developed initially in order to preview the performance of a primary gyratory crusher that is fed directly from trucks. Operational conditions of the equipment such as closed and open-side settings could be adjusted previously, obtaining different product size distributions. Variability of size of the fragments affects subsequent stages of crushing and can increase circulating load in the circuit. This leads to a decrease of productivity or recovery of the ore dressing. The results showed insignificant errors of accuracy and reproducibility of the sampling protocol when applied to friable itabirite rocks.

scholarly journals Acid Blue 25 Removal by using Electro-Persulfate Process

2020 ◽  
Author(s):  
Zeinab Ghorbani
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Salt Concentration ◽  
Dye Removal ◽  
Industrial Effluents ◽  
Sodium Persulfate ◽  
Initial Concentration ◽  
Acid Blue 25 ◽  
Sulfate Process ◽  
Acid Blue

This study aimed to investigate the efficiency of the electro-persulfate process in removing acid blue 25 from aqueous solution. In order to optimize the parameters, the OFAT method was used, and the effect of three main parameters, including pH, sodium persulfate salt concentration, and current intensity was investigated. According to the results, the optimal removal efficiency of 94% in 60 minutes was obtained under conditions of pH=5, the initial concentration of sodium persulfate=250 mg / L, and the current=500 mA. According to the results of this study, the electro-persulfate process sulfate process can be an efficient process for dye removal from industrial effluents.

scholarly journals Synthesis and Characterization of Polyacrylic Acid Based Nano-Hybrid Polymers for Malachite Green Uptake

2020 ◽  
Vol 6 (2) ◽  
pp. 682-685
Author(s):  
Ashish Kumar ◽  
G.S. Chauhan
Keyword(s):  
Malachite Green ◽  
Polyacrylic Acid ◽  
Environmental Concern ◽  
Sol Gel ◽  
Spectroscopic Techniques ◽  
Hybrid Polymer ◽  
Retention Capacity ◽  
Hybrid Polymers ◽  
Organic Part ◽  
Swelling Studies

Removal of malachite green from water bodies is an environmental concern of utmost priority. It requires adsorbents that can efficiently operate under real conditions. In view of this, a new polyacrylic acid based nano-hybrid polymer was synthesized by using sol-gel method in which acrylic acid acts as an organic part and tetraethoxysilane (TEOS) as an inorganic component. The new series of two other nano-hybrid polymers were also synthesized by using nanoparticles of iron oxide and titanium dioxide. The synthesized nano-hybrid polymers were extensively characterized using FTIR and XRD spectroscopic techniques. Further the synthesized nano-hybrid polymers were subjected to swelling studies with respect to different parameter such as time, temperature and pH. Malachite green was used as a cationic dye for studying the uptake behavior of synthesized polymers. Maximum retention capacity (MRC) and reusability of hybrid polymers were also evaluated up to ten cycles. The hybrid polymer, poly(AAc)/TEOS was more effective with high dye retention capacity.

scholarly journals Heavy metal phytoremediation: Potential and advancement

2020 ◽  
pp. 81-93
Author(s):  
Pushpa Chaudhary Tomar ◽  
Shilpa Samir Chapadgaonkar ◽  
Varsha Panchal ◽  
Arpita Ghosh
Keyword(s):  
Heavy Metal ◽  
Industrial Waste ◽  
Research Work ◽  
Industrial Effluents ◽  
Ex Situ ◽  
Plant Tissues ◽  
Land Resource ◽  
Environmental Friendly ◽  
Different Types

Industrial activities lead to the release of different types of toxic metals into the environment. Phytoremediation has been established as one of the environmental-friendly and economical processes that have the potential for the remediation of industrial waste. Phytoremediation is used to extract metals from industrial effluents using ex-situ and in-situ treatments. Also, phytoremediation may be used to reclaim the polluted land resource for agricultural purposes. Moreover, this also prevents the bioaccumulation and biomagnification of xenobiotics from farming activities if carried out from polluted land. Phyto-mining can be done to recover and reuse the heavy metals from plant tissues after phytoremediation by plants. This study aimed to give a comprehensive review of recent research work in heavy metal phytoremediation.

scholarly journals Seasonal assessment, treatment and removal of heavy metal concentrations in a tropical drinking water reservoir

2016 ◽  
Vol 35 (2) ◽  
pp. 103-113 ◽  
Author(s):  
Moshood Keke Mustapha ◽  
Joy Chinenye Ewulum
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Best Management Practices ◽  
Management Practices ◽  
Anthropogenic Activities ◽  
Health Hazard ◽  
Water Reservoir ◽  
Industrial Effluents ◽  
High Concentration ◽  
Agricultural Materials

AbstractHeavy metals are present in low concentrations in reservoirs, but seasonal anthropogenic activities usually elevate the concentrations to a level that could become a health hazard. The dry season concentrations of cadmium, copper, iron, lead, mercury, nickel and zinc were assessed from three sites for 12 weeks in Oyun reservoir, Offa, Nigeria. Triplicate surface water samples were collected and analysed using atomic absorption spectrophotometry. The trend in the level of concentrations in the three sites is site C > B > A, while the trend in the levels of the concentrations in the reservoir is Ni > Fe > Zn > Pb > Cd > Cu > Hg. Ni, Cd, Pb and Hg were found to be higher than the WHO guidelines for the metals in drinking water. The high concentration of these metals was from anthropogenic watershed run-off of industrial effluents, domestic sewages and agricultural materials into the reservoir coming from several human activities such as washing, bathing, fish smoking, especially in site C. The health effects of high concentration of these metals in the reservoir were highlighted. Methods for the treatment and removal of the heavy metals from the reservoir during water purification such as active carbon adsorption, coagulation-flocculation, oxidation-filtration, softening treatment and reverse osmosis process were highlighted. Other methods that could be used include phytoremediation, rhizofiltration, bisorption and bioremediation. Watershed best management practices (BMP) remains the best solution to reduce the intrusion of the heavy metals from the watershed into the reservoir.

Two-fold 2D + 2D → 2D interweaved rhombus (4,4) grid: synthesis, structure, and dye removal properties in darkness and in daylight

2019 ◽  
Vol 48 (3) ◽  
pp. 1095-1107 ◽  
Author(s):  
Meng-Jung Tsai ◽  
Jheng-Hua Luo ◽  
Jing-Yun Wu
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Malachite Green ◽  
Dye Removal ◽  
Acid Orange 7 ◽  
High Adsorption ◽  
Acid Orange ◽  
Adsorption Capacities

A rhombus (4,4) grid showing two-fold 2D + 2D → 2D interweaved nets appeared to be a good adsorbent to selectively adsorb and separate anionic methyl orange (MO) and acid orange 7 (AO7) dyes over cationic methylene blue (MB) and malachite green (MG) from water with high adsorption capacities in both darkness and daylight.

Sign in / Sign up

Export Citation Format

Share Document