Research on the Removal Effect of Acidic Wastewater Containing Copper by Steel Slag

2013 ◽  
Vol 788 ◽  
pp. 428-433
Author(s):  
Jin Li ◽  
Li Chao An
Keyword(s):  
Contact Time ◽  
Low Cost ◽  
Steel Slag ◽  
Order Reaction ◽  
Batch Experiments ◽  
Second Order Reaction ◽  
Kinetics Studies ◽  
Adsorbate Concentration ◽  
Equilibrium Adsorption Capacity ◽  
Acidic Wastewater

Steel slag which is a byproduct of the steelmaking process was found to be a low cost and promising adsorbent for the removal of Copper from acidic wastewater. Batch experiments were conducted to study the main parameters such as dosage of adsorbent, particle size initial adsorbate concentration, contact time, kinetic, and pH solution on the sorption of Copper (II) by steel slag. By using linear Freundlich and Langmuir isotherms, the equilibrium adsorption capacity of steel slag for Copper was determined. The adsorption kinetics studies indicated that the data followed the second-order reaction with R2of 0.99. The study is aimed at research the potential of a novel use of steel slag for the treatment of wastewaters contaminated with heavy metals.

scholarly journals The Novel Use of Saraca thaipingensis Leaf Powder as Potential Biosorbent Material for the Removal of Chromium(VI)

2015 ◽  
Vol 3 (3) ◽  
pp. 35-39
Author(s):  
Sannasi Palsan ◽  
Chai Swee Fern ◽  
Stephanie Bernardine ◽  
Lim Fan Shiang
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Contact Time ◽  
Low Cost ◽  
Peninsular Malaysia ◽  
The Novel ◽  
Batch Experiments ◽  
Chromium Vi ◽  
Removal Of Heavy Metals ◽  
Leaf Powder

Saraca thaipingensis or ‘Gapis’ tree, classified under the Fabaceae family is a native of Taiping; copious over Peninsular Malaysia and Southeast Asia. The withered and fallen dead leaves were collected from INTI International University’s garden walkway. To date, literature has yet to capture the use of S. thaipingensis tree parts or refuse as potential biosorbent material for the removal of heavy metals thus verifying the novelty of this study. Batch experiments were carried out with the leaf powder to study the effects of dosage, particle size and contact time towards Cr(VI) removal (%) at 1-100 mg/L. Results showed that Cr(VI) removal increased from 52.22% to 99.31% (p < 0.05) with increase in biosorbent dosage (0.005, 0.010, 0.015, 0.020, 0.025 and 0.050 g). The different particle size ranges tested were: 107-125, 126-150, 151-250, 251-500, and 501- 1000 ?m. Highest Cr(VI) removal of 99.53% was obtained with the 151-250 ?m particle size; further size decrease did not yield more removal (p > 0.05). The optimal Cr(VI) removal was recorded after 45 min (99.62%) and 90 min (99.76%) contact time (p > 0.05). Further characterization and optimization studies are being carried out to develop a novel, sustainable, low cost yet effective leaf powder based biosorbent material.

Phosphorus and Nitrogen Removal from Sewage by Modified Honeycomb Cinder

2013 ◽  
Vol 726-731 ◽  
pp. 2931-2935
Author(s):  
Qi Bin Liang ◽  
Yun Gen Liu ◽  
Kun Tian
Keyword(s):  
Nitrogen Removal ◽  
Phosphorus Removal ◽  
Contact Time ◽  
Low Cost ◽  
Ammonia Nitrogen ◽  
Domestic Sewage ◽  
Operating Conditions ◽  
Optimal Conditions ◽  
Batch Experiments ◽  
Adsorption Capacities

The study aimed at phosphorus and nitrogen removal by honeycomb cinder modified with Zinc chloride (ZnCl2). By bench-scale batch experiments, honeycomb cinders with different modification time and ZnCl2 dosage were modified and its adsorption capacities were evaluated by methylence blue as the adsorbate. Under the optimal modification conditions, large amount modified honeycomb cinders were prepared to remove the phosphorus and nitrogen from domestic sewage, which different operating conditions of honeycomb cinders dosage, and contact time were considered. The results show that removal efficiencies of total phosphate (TP), orthophosphate (PO43-P), total nitrogen (TN) and ammonia nitrogen (NH4+-N) could reach 89.9%, 96.7%, 18.9% and 23.3% under the optimal conditions, respectively. Modified honeycomb cinders might be an effective and low cost adsorbent for phosphorus removal.

scholarly journals Synthesis, Characterization and Performance of Low-Cost Unconventional Adsorbents Derived from Waste Materials

2020 ◽  
Vol 10 (6) ◽  
pp. 7243-7256 ◽  
Keyword(s):  
Adsorption Mechanism ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Kinetic Studies ◽  
Maximum Adsorption Capacity ◽  
Batch Experiments ◽  
Adsorbate Concentration ◽  
Optimum Ph ◽  
And Performance

Adsorption of the solute on solid is an equilibrium operation. The nature of adsorbent affects the efficiency of the operation. High surface area per unit volume is the essential attribute of a good adsorbent. Isotherm and kinetic studies are carried out to understand the adsorption mechanism. Many investigators have carried out batch experiments to study the effect of various parameters like initial adsorbate concentration, pH, particle size, and adsorbent dose. The use of adsorbents derived from low-cost materials makes this operation acceptable in industries. Regeneration of adsorbent can reduce the problem of disposal of used adsorbent material. Optimum values of affecting parameters can be determined from batch experiments. The isotherm and kinetic constants can be determined from batch experiments. These investigations give us an idea about the nature of adsorbent, maximum adsorption capacity, the order of adsorption, and optimum pH. This review sheds light on investigations on adsorbents derived from unconventional adsorbents and their characterization and performance evaluation.

scholarly journals Steel slag as low-cost adsorbent for the removal of phenanthrene and naphthalene

2018 ◽  
Vol 36 (3-4) ◽  
pp. 1160-1177 ◽  
Author(s):  
Liyun Yang ◽  
Xiaoming Qian ◽  
Zhi Wang ◽  
Yuan Li ◽  
Hao Bai ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Low Cost ◽  
Steel Slag ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Batch Experiments ◽  
Obvious Effect ◽  
X Ray ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model

This study investigates the removal effectiveness and characteristics of phenanthrene and naphthalene using low-cost steel slag with batch experiments. The adsorption characteristics of steel slag were measured and analysed using X-ray fluorescence, X-ray diffraction, and Fourier transform infrared spectroscopy. The batch experiments investigated the effect of the time gradient, pH, and steel slag dosage gradient on the adsorption of the steel slag. The results show that with time and dosage of steel slag increased, the adsorption capacity of phenanthrene and naphthalene increased and gradually became balanced, but pH had no obvious effect on the adsorption of phenanthrene and naphthalene. The Langmuir isotherm model best describes the phenanthrene and naphthalene removal by the steel slag, which shows the adsorption occurring in a monolayer. The maximum adsorption capacity of the steel slag to phenanthrene and naphthalene is 0.043 and 0.041 mg/g, respectively. A pseudo-first-order kinetic model can better represent the adsorption of phenanthrene and naphthalene by steel slag. The research demonstrates that the steel slag has a certain adsorption capacity for phenanthrene and naphthalene.

scholarly journals Removal of water hardness using zeolite synthesized from Ethiopian kaolin by hydrothermal method

2018 ◽  
Vol 14 (1) ◽  
pp. 145-159 ◽  
Author(s):  
Tadele Assefa Aragaw ◽  
Adane Adugna Ayalew
Keyword(s):  
Adsorption Capacity ◽  
Hydrothermal Method ◽  
Contact Time ◽  
Low Cost ◽  
Infrared Spectrometry ◽  
Zeolite Synthesis ◽  
Batch Experiments ◽  
Water Softening ◽  
Scanning Calorimetry ◽  
Wide Range

Abstract The use of low cost materials in zeolite synthesis becomes an area of important interest in water softening. This research is aimed to utilize kaolin for zeolite synthesis with hydrothermal method. Mechanical, thermal chemical treatments of raw kaolin were used for zeolite synthesis. Fourier Transform Infrared Spectrometry (FTIR), AAS, XRD, surface area (BET), differential scanning calorimetry and TGA were used to characterize kaolin and zeolite and UV–VIS/spectrometer were used for adsorption capacity of ion exchange. Effect of contact time, pH solution and temperature of the solution were studied for batch experiments. XRD values indicated that the prepared material is showed as fully crystalline and primarily amorphous. Before and after hardness removal sample transmittance percentage intensity showed a wide range of difference. From this study, it can be deduced that Zeolite can be used as a low cost water softening agent. At room temperature, the residue is well with calcium and badly with magnesium, whereas affinity toward Mg ions increases to acceptable levels at 60 °C. The cation exchange capacity of zeolite was found to be dependent on contact time. The batch experiments of removing Ca2+ and Mg2+ show that the adsorption capacity of zeolite in calcium ion is higher affinity than magnesium ion.

scholarly journals Pyrolysis Process as a Sustainable Management Option of Poultry Manure: Characterization of the Derived Biochars and Assessment of their Nutrient Release Capacities

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2271 ◽  
Author(s):  
Samar Hadroug ◽  
Salah Jellali ◽  
James J. Leahy ◽  
Marzena Kwapinska ◽  
Mejdi Jeguirim ◽  
...  
Keyword(s):  
Contact Time ◽  
Low Cost ◽  
Total Duration ◽  
Poultry Manure ◽  
Nutrient Release ◽  
Batch Experiments ◽  
Surface Charges ◽  
Slow Release Fertilizers ◽  
Static Conditions ◽  
Raw Poultry

Raw poultry manure (RPM) and its derived biochars at temperatures of 400 (B400) and 600 °C (B600) were physico-chemically characterized, and their ability to release nutrients was assessed under static conditions. The experimental results showed that RPM pyrolysis operation significantly affects its morphology, surface charges, and area, as well as its functional groups contents, which in turn influences its nutrient release ability. The batch experiments indicated that nutrient release from the RPM as well as biochars attains a pseudo-equilibrium state after a contact time of about 48 h. RPM pyrolysis increased phosphorus stability in residual biochars and, in contrast, transformed potassium to a more leachable form. For instance, at this contact time, P- and K-released amounts passed from 5.1 and 25.6 mg g−1 for RPM to only 3.8 and more than 43.3 mg g−1 for B400, respectively. On the other hand, six successive leaching batch experiments with a duration of 48 h each showed that P and K release from the produced biochars was a very slow process since negligible amounts continued to be released even after a total duration of 12 days. All these results suggest that RPM-derived biochars have specific physico-chemical characteristics allowing them to be used in agriculture as low-cost and slow-release fertilizers.

ADSORPTION AND REGENERATION OF SUNGAI PASAK PUMICE AS AN ADSORBENT FOR AMMONIUM REMOVAL IN WATER

2019 ◽  
Vol 10 (1) ◽  
pp. 38-46
Author(s):  
Ningsih Ika Pratiwi ◽  
Annisa Huwaida ◽  
Shinta Indah ◽  
Denny Helard
Keyword(s):  
Waste Water ◽  
Porous Structure ◽  
Adsorption Capacity ◽  
Contact Time ◽  
Low Cost ◽  
Optimum Conditions ◽  
Isotherm Equation ◽  
Ammonium Removal ◽  
Adsorbate Concentration ◽  
Adsorbent Dose

Pumice is known as a low-cost material with a porous structure, has the potential as an adsorbent to remove various kinds of pollutant compounds. The abundance of pumice is found in Sungai Pasak area and it never been utilized. This study was performed to see the ability of Sungai Pasak pumice as an adsorbent for ammonium removal in water along with its ability to be regenerated. The study was carried out triplo in batches to obtain optimum adsorption conditions which were then used in desorption experiments using HCl 0.1 M agent for regeneration process. The optimum conditions obtained: adsorbate pH 6, adsorbent dose 0.3 g/l, contact time 30 minutes, adsorbent diameter 63 µm and adsorbate concentration 4 mg/l. The results showed that pumice has ability to remove ammonium with adsorption capacity at optimum conditions were 47.06% and 6.27 mg/g with Freundlich's isotherm equation (R2=0.997). Acid agents are able to adsorb ammonium from pumice with an average desorption percentage 88.89% after 2 times of reuse, proving that acidic agents are able to regenerate pumice adsorbents so they can be reused. The potential for adsorption and regeneration of the Sungai Pasak pumice can be utilized to treat water with ammonium such as groundwater and waste water.

scholarly journals Thermodynamic and Kinetic Behaviors of Copper (II) and Methyl Orange (MO) Adsorption on Unmodified and Modified Kaolinite Clay

2021 ◽  
Author(s):  
Aicha Kourim ◽  
Moulay Abderrahmane Malouki ◽  
Aicha Ziouche
Keyword(s):  
Methyl Orange ◽  
Cation Exchange Capacity ◽  
Contact Time ◽  
Low Cost ◽  
Exchange Capacity ◽  
Point Of Zero Charge ◽  
Batch Experiments ◽  
Kaolinite Clay ◽  
Experimental Parameters

In this study, the adsorption of Copper Cu (II) and methyl Orange (MO) from aqueous solution, on Tamanrasset’s unmodified and modified Kaolinite clay which as low cost adsorbents, was studied using batch experiments. The adsorption study includes both equilibrium adsorption isotherms, kinetics and thermodynamics study. For the characterization of the adsorbent several properties are determined such as pH, the Specific Surface Area, the Point of Zero Charge and the Cation Exchange Capacity. Indeed, various parameters were investigated such as contact time, initial metal and dye concentration, mass of solid, pH of the solution and temperature. The adsorption process as batch study was investigated under the previews experimental parameters.

scholarly journals Adsorptive removal of catechol and resorcinol by orange flavedo (citrus sinensis): mechanisms based on the flavedo com-ponents d-limonene, carotenoids, ascorbates, flavonoids and hydroxycinnamic acids

2017 ◽  
Vol 6 (1) ◽  
pp. 7
Author(s):  
Kamgaing Theophile ◽  
Doungmo Giscard ◽  
Ngouoko Kouonang Jimmy Julio ◽  
Tchieno Melataguia Francis Merlin ◽  
Ketcha MBadkam Joseph
Keyword(s):  
Contact Time ◽  
Low Cost ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
Batch Mode ◽  
X Ray ◽  
Adsorbate Concentration ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Adsorption Phenomena

Orange flavedo and its adsorption behavior towards catechol (Ctc) and resorcinol (Res) were studied. Adsorption experiments were conducted in batch mode at room temperature. X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Brunauer−Emmett−Teller (BET) and Fourier transform infrared (FTIR) data were used to characterize the biosorbent. The Effects of various parameters including equilibrium pH, sorbent dosage, initial adsorbate concentration and contact time were investigated. The optimum contact time and pH for the removal of Ctc and Res were 35 min and pH 2 respectively. The adsorption isotherms fitted well with Freundlich model, the adsorption of Ctc and Res being multilayer and the surface of orange flavedo heterogeneous; the pseudo-second order kinetic model better reflects the adsorption phenomena. An adsorption mechanism based on the molecules grafted to the surface of the orange flavedo is proposed in this study. 0.2 gram of the biosorbent was sufficient to completely eliminate 2.2 milligrams of resorcinol and catechol from solution. Therefore, non-modified orange flavedo is a promising candidate, as a low-cost biosorbent, for the removal of Ctc and Res from aqueous solution.

scholarly journals Isothermal and Kinetic Evaluation of Adsorption Fish Farm Effluents by Nanocomposites (Chitosan and Activated Carbon)

2021 ◽  
Vol 9 (2) ◽  
pp. 129-138
Author(s):  
Hassan Rezaei ◽  
◽  
Saeedeh Rastegar ◽  
Seyyed Aliakbar Hedayati ◽  
Yousef Dadban Shahamat ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Organic Pollutants ◽  
Contact Time ◽  
Low Cost ◽  
Fish Farm ◽  
Adsorption Efficiency ◽  
Kinetic Evaluation ◽  
Freundlich Isotherms ◽  
Kinetics Studies ◽  
Carbon Nanocomposite

Background: In wastewater treatment, removal of phosphate and ammonia is of great importance. Chitosan is a copolymer, which can be applied in low-cost adsorption. Thus, in this study, chitosan and activated carbon nanocomposite adsorbents were prepared to remove organic pollutants from the fish farm effluents. Methods: This study was performed at different physicochemical conditions of pH (5-8), effluent dose (25-100 mg/L), and contact time (15-90 min) minutes. Adsorption isotherm studies were analyzed using Freundlich, Langmuir models, and adsorption kinetics studies. Results: The Langmuir and Freundlich isotherms for nitrite (R2=0.9076, R2=0.5911), phosphate (R2=0.9307, R2=0.5755), and ammonia (R2=0.7288 and R2=0.7549) were respectively obtained. According to the results, the data of nitrite and phosphate pollutants were more consistent with the Langmuir model, but the data of ammonia pollutants were more consistent with the Freundlich. The best optimal adsorption occurred at a pH=7. Elevation of the initial concentration of the pollutant led to the depletion of the removal functions. With increasing the contact time, adsorption efficiency increased. Conclusion: Finally, with respect to the obtained elimination percentage (R=99.98%), chitosan and activated carbon nanocomposites have a high ability to remove organic pollutants.

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