scholarly journals Preparation and Methylene Blue Adsorption Capacity of HDPE/PVA Foaming Composites

2021 ◽  
Author(s):  
Fenghong Li ◽  
Zhe Wang ◽  
Pengzhen Li ◽  
Wei Da ◽  
Weisi Lv ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methylene Blue ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Raw Material ◽  
Good Effect ◽  
Foaming Agent ◽  
Alpha Olefin ◽  
Negative Effect ◽  
Influence Of Ph

Abstract High density polyethylene (HDPE) and polyvinyl alcohol (PVA) are blended with maleic anhydride grafted amorphous-alpha olefin copolymer as the compatibilizer. The effects of different raw material ratio and the content of compatibilizer and foaming agent on the mechanical properties of the material are studied. It is found that the increasing content of PVA added to HDPE has a negative effect on the properties of the composites. The compatibility and mechanical properties are improved after adding MAH-g-APAO and the most appropriate addition amount is 4%. Foaming agent can make the material lightweight but will decrease the mechanical properties of the material. The composites have a good effect on the removal of methylene blue (MB). Through the experiment, it is found that the initial concentration of MB and adsorption time will also influence the adsorption. The experiment to explore the influence of pH value and temperature of solution on the removal efficiency shows that alkaline environment and high temperature can promote the removal of MB. At 343.15 K, the adsorption capacity (qe) reaches 2.08 mg·g-1. Using the composites to remove dye has the advantages of environmental protection, simple operation and easy recycling. It has broad application prospects in the field of dye wastewater treatment.

Adsorption of Methylene Blue from Aqueous Solution Using Honeycomb-Cinder

2012 ◽  
Vol 550-553 ◽  
pp. 2259-2262
Author(s):  
Song Bo Cui ◽  
Hua Yong Zhang ◽  
Lu Yi Zhang
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Dye Wastewater ◽  
Batch System ◽  
Adsorption Data ◽  
Adsorption Processes ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Mb Adsorption

The adsorption behavior of methylene blue (MB) dye from aqueous solutions onto honeycomb-cinder (HC) and its acid-activated product was investigated in a batch system. The results showed the adsorption capacity was decreased for raw HC samples with the increase of pH value, while it was increased for activated samples. The adsorption data were fit with Langmuir isotherm model for MB adsorption by all samples. The MB adsorption capacity on samples was increased from 2.62 mg/g to 7.81 mg/g and 7.00 mg/g after acid-activated by HCl and H2SO4, respectively. The adsorption processes of MB followed pseudo-second-order kinetics with a coefficient of correlation≥0.99. This study demonstrated that acid-activated HC has superior adsorbing ability for MB than raw HC and can be used as alternative adsorbents in dye wastewater treatment.

scholarly journals Particleboards from Recycled Thermally Modified Wood

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1462
Author(s):  
Ján Iždinský ◽  
Zuzana Vidholdová ◽  
Ladislav Reinprecht
Keyword(s):  
Mechanical Properties ◽  
Urea Formaldehyde ◽  
Brown Rot ◽  
Decay Resistance ◽  
Raw Material ◽  
Modulus Of Rupture ◽  
Negative Effect ◽  
Serpula Lacrymans ◽  
Thermally Modified Wood ◽  
Modified Wood

In recent years, the production and consumption of thermally modified wood (TMW) has been increasing. Offcuts and other waste generated during TMWs processing into products, as well as already disposed products based on TMWs can be an input recycled raw material for production of particleboards (PBs). In a laboratory, 16 mm thick 3-layer PBs bonded with urea-formaldehyde (UF) resin were produced at 5.8 MPa, 240 °C and 8 s pressing factor. In PBs, the particles from fresh spruce wood and mixed particles from offcuts of pine, beech, and ash TMWs were combined in weight ratios of 100:0, 80:20, 50:50 and 0:100. Thickness swelling (TS) and water absorption (WA) of PBs decreased with increased portion of TMW particles, i.e., TS after 24 h maximally about 72.3% and WA after 24 h maximally about 64%. However, mechanical properties of PBs worsened proportionally with a higher content of recycled TMW—apparently, the modulus of rupture (MOR) up to 55.5% and internal bond (IB) up to 46.2%, while negative effect of TMW particles on the modulus of elasticity (MOE) was milder. Decay resistance of PBs to the brown-rot fungus Serpula lacrymans (Schumacher ex Fries) S.F.Gray increased if they contained TMW particles, maximally about 45%, while the mould resistance of PBs containing TMW particles improved only in the first days of test. In summary, the recycled TMW particles can improve the decay and water resistance of PBs exposed to higher humidity environment. However, worsening of their mechanical properties could appear, as well.

Insights into the mechanism of methylene blue removed by novel and classic biochars

2019 ◽  
Vol 79 (8) ◽  
pp. 1561-1570
Author(s):  
Wei Chen ◽  
Fengting Chen ◽  
Bin Ji ◽  
Lin Zhu ◽  
Hongjiao Song
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Low Cost ◽  
Underlying Mechanism ◽  
Maximum Adsorption Capacity ◽  
Experimental Conditions ◽  
Average Pore ◽  
Adsorption Effect ◽  
Magnolia Grandiflora

Abstract The adsorption behavior and the underlying mechanism of methylene blue (MB) sorption on biochars prepared from different feedstocks at 500 °C were evaluated. The biochar feedstocks included Magnolia grandiflora Linn. leaves biochar (MBC), pomelo (Citrus grandis) peel biochar (PBC) and badam shell biochar (BBC). The results of characterizing and analyzing the samples showed that different biochars had different effects on the adsorption of MB. It could be found that MBC had the best adsorption effect on MB due to its largest average pore diameter of 5.55 nm determined by Brunauer-Emmett-Teller analysis. Under the optimal conditions, the maximum adsorption capacities of BBC, PBC and MBC were 29.7, 85.15 and 99.3 mg/g, respectively. The results showed that the amount of adsorption was affected by the pH value. The maximum adsorption capacity of MBC was 46.99 mg/g when it was at pH of 3, whereas for the same experimental conditions the maximum adsorption capacity of BBC and PBC was 25.29 mg/g at pH of 11 and 36.08 mg/g at pH of 7, respectively. Therefore, MBC was found to be a most efficient low-cost adsorbentl for dye wastewater treatment compared with BBC and PBC, and it had the best removal effect under acidic conditions.

scholarly journals Activated carbon and biochar from pineapple waste biomass for the removal of methylene blue

2021 ◽  
Vol 1 (1) ◽  
pp. 30-36
Author(s):  
Khoirun Nisa Mahmud ◽  
Tan Hui Wen ◽  
Zainul Akmar Zakaria
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Water System ◽  
Raw Material ◽  
Waste Biomass ◽  
Adsorbent Dosage ◽  
Pineapple Waste ◽  
Area Functional ◽  
Dye Pollution

Dye pollution in water system is of concern due to its carcinogenicity and its effect on aesthetic feature. One pollutant of interest is methylene blue (MB), which is a cationic dye widely used in industries. In this study, pyrolysis process was used to convert pineapple waste biomass (PWB) into useful adsorbents such as biochar (BC) and activated carbon (AC) to remove MB in water. BC was produced from pyrolysis of PWB (340 °C, 3 hours) whereas AC was prepared from pyrolysis of PWB (500 °C, 1 hour) impregnated with zinc chloride (ZnCl2). Prior to use, AC-PWB and BC-PWB were characterized for surface area, functional groups and surface morphology. Removal of MB was investigated by varying different parameters i.e. initial MB concentration and contact time, adsorbent dosage and temperature. Results obtained showed that AC-PWB has higher adsorption capacity than BC-PWB. The adsorption capacity and adsorption rate increased with increasing initial concentration of MB, adsorbent dosage and temperature until reached equilibrium condition. As a conclusion, PWB can be used as a useful raw material to produce cheap and environmentally friendly adsorbent to remove dye from solution.

scholarly journals Neem Leaves as Adsorbent for Dye Waste water Treatment

2019 ◽  
Vol 8 (9) ◽  
pp. 3071-3073
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Blue Dye ◽  
Aqueous Streams ◽  
Neem Leaves ◽  
Initial Ph ◽  
Adsorbent System

In the present investigation , neem leaves are obtained from the agricultural fields and its potential for the removal of dye is tested with the model system of methylene blue in water . The MB has health hazards, its been reported that exposures to the dyes cause allergic reactions, and hence its reflected as toxic. The results obtained from batch experiments are quite useful in giving information about the efficacy of dye-adsorbent system. The influence of factors such as the initial pH value, adsorbent dose, and time of contact was investigated. The results indicate that the percentage removal also increased with the rise in the adsorption capacity (qe). 82% of colour elimination can be obtained at the dose of 100g/l NLP for methylene blue of 10mg/l concentration. The optimal parameters for this experiment were 10mg/l for initial dye concentration, 5gm/50ml adsorbent dosage and pH 8. In the batch system, the adsorption capacity was increased when the parameters were increased until it achieved the equilibrium. Langmuir adsorption isotherm graphics plotted with l/qevis 1/Ce. Trend lines for the adsorption data of different concentration of methylene blue with neem leave as adsorbent is plotted. The linear regression was piloted using plot l/qevis 1/Ce; it was found that R2 value are quite closer to 1 signifying Langmuir isotherm as a good fit for this experimental data. Results indicated that neem leaves has potential to remove Methylene Blue Dye from aqueous streams and can be successfully used as a low cost adsorbent.

The Behaviors of Removing Silver Ions by Low-Cost Expanded Rice Husk, Nature Diatomite and Nature Bentonite as Sorbents

2012 ◽  
Vol 724 ◽  
pp. 472-475
Author(s):  
Xuan Liang ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Qiang Mei
Keyword(s):  
Adsorption Capacity ◽  
Rice Husk ◽  
Ph Value ◽  
Low Cost ◽  
Silver Ions ◽  
Maximum Adsorption Capacity ◽  
Removal Of Heavy Metals ◽  
Initial Ph ◽  
Influence Of Ph ◽  
By Products

Low cost industrial and agricultural by-products are promising materials for water pollution treatment such as removal of heavy metals. This work deals with removal of silver ions from solutions using expanded rice husk (ERH), nature diatomite (ND) and nature bentonite (NB). Firstly the influence of pH value of the solution on adsorption capacity for silver ions was studied, and then the effect of initial silver concentration on adsorbents adsorption capacity was investigated. The silver ions removal percentage increases with initial pH and achieves a maximum value of nearly 94% at pH= 5.0 ± 0.5 for ERH. The maximum adsorption capacity is 18.6 mg/g for ERH.

Application of Bamboo Shoot Shell in Color Removal from Methylene Blue Solution

2014 ◽  
Vol 675-677 ◽  
pp. 489-492
Author(s):  
Jing Miao Zhang ◽  
Zhi Wei Zhong ◽  
Da Pan Zhu ◽  
Lin Man Lin ◽  
Qing Ju Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Removal Efficiency ◽  
Ph Value ◽  
Color Removal ◽  
Target Color ◽  
Maximum Adsorption Capacity ◽  
Bamboo Shoot ◽  
Blue Solution ◽  
Optimized Conditions

Biosorption of dyeing wastewater is most widely used method so far. The adsorption of methylene blue (MB) with bamboo shoot shell (BSS) as biosorbent was investigated. Orthogonal test was used to optimize the adsorption process, and adsorption capacity and color removal efficiency were used to judge the adsorptivity of BSS. Results showed that maximum adsorption capacity was 225.71 mg·g-1, and color removal efficiency could achieve to 98.96% during the test. To obtain best adsorption capacity, the optimized conditions of temperature, initial concentration of dye, BSS dosage, pH value and adsorption time were 45 °C, 400 mg·L-1, 10 mg/10 mL, 9.6 and 30 min, respectively. As to another target color removal efficiency, the best parameters were 100 mg·L-1, 200 mg/10 mL, 11.5 and 120 min, respectively. The results reveal that the agricultural by-product BSS is an effective biosorbent.

scholarly journals Studying the influence of properties of initial ZrO2-(7 %)Y2O3 powders on properties of ceramic products

2019 ◽  
pp. 44-50
Author(s):  
N. V. Zhirenkina ◽  
M. A. Mashkovtsev ◽  
N. V. Obabkov ◽  
I. F. Zakirov
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Zirconium Oxide ◽  
Ph Value ◽  
Slip Casting ◽  
Mechanical Grinding ◽  
Influence Of Properties ◽  
Influence Of Ph ◽  
Research Show

The paper focuses on the possibility of forming ceramic products by the method of slip casting without the stage of mechanical grinding of powders. We studied the influence of pH value of hydroxides precipitation and hydrothermal treatment on the properties of ZrO2-(7 %)Y2O3 powders, and on the mechanical properties of ceramic products made from synthesized ZrO2-(7 %)Y2O3 powders without a grinding stage. Findings of research show that the quality of ceramic products based on zirconium oxide is more influenced by the specific surface area, rather than the particle size of the initial powders

scholarly journals Sodium Dodecylbenzene Sulfonate-Modified Biochar as An Adsorbent for The Removal of Methylene Blue

2021 ◽  
Vol 16 (1) ◽  
pp. 188-195
Author(s):  
Argo Khoirul Anas ◽  
Sandy Yudha Pratama ◽  
Aqidatul Izzah ◽  
Muhammad Arsyik Kurniawan
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Sodium Dodecyl ◽  
Waste Utilization ◽  
Sodium Dodecylbenzene Sulfonate ◽  
Biomass Waste ◽  
Modified Biochar ◽  
Dodecylbenzene Sulfonate ◽  
Open Access Article

Biochar is an interesting adsorbent material due to its use is correlated with biomass waste utilization and also minimize environmental pollution from high amount of biomass by-product. Regarding to improve the biochar ability in water treatment, several surface modifications have been developed, one of them is modification using surfactant. In this study, sodium dodecylbenzene sulfonate (SDBS) was used to modify the surface of biochar prepared from pyrolysis of cassava peels (Manihot utilissima). Its performance in biochar modification to remove methylene blue (MB) dyes was compared with sodium dodecyl sulphate (SDS) surfactant for observing the important of – interactions mechanisms. The analysis of biochar and biochar-SDBS were conducted by using Fourier transform infrared (FTIR), CHNS elemental analysis, and scanning electron microscope (SEM). Furthermore, the adsorption experiments were conducted using UV-Vis spectrophotometer. It is known that modification using SDBS could increase the adsorption capacity of biochar not only from electrostatic interaction but also through – interactions mechanisms. In this respect, as the amount of SDBS mass increased, the adsorption capacity was also improved due to the modification produced more active cites on biochar. The maximum MB adsorption onto biochar-SDBS occurred at adsorbent mass of 15 mg with optimum pH value of 10. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Effects of pH Value and Water Content of Sol on TiO2 Photocatalytic Activity Prepared by SAS

2013 ◽  
Vol 774-776 ◽  
pp. 864-867
Author(s):  
Zai Feng Shi ◽  
Su Min Zhang ◽  
Su Guo
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Photocatalytic Activity ◽  
Citric Acid ◽  
Water Content ◽  
Mass Fraction ◽  
Ph Value ◽  
Sol Gel ◽  
Raw Material ◽  
Effects Of Ph

To investigate the effects of sol pH value and water content on photocatalytic activity of TiO2 prepared with sol-gel auto-igniting synthesis (SAS) method, TiO(NO3)2 was prepared with TiCl4 as raw material and used as precursor of TiO2. By changing sol pH value and water content, different TiO2 powders were prepared and characterized with XRD, SEM and photodegradation of methylene blue (MB). Results indicated that TiO2 presented the highest photocatalytic activity while sol pH value and mass fraction of water were adjusted to 7 and 50% respectively while the mole ratio of n (TiCl4): n (citric acid): n (ammonium nitrate) was fixed as 1: 1: 3. The TiO2 powders were confirmed as loose and porous anatase type with particle size of 15 nm by SEM and XRD.

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