scholarly journals Alumina as environmentally stable adsorbent for the removal of diresul black dye from waste water

2018 ◽  
Vol 14 (1) ◽  
pp. 62-70 ◽  
Author(s):  
Tayyaba Asim ◽  
Mamoona ◽  
Arifa Tahir ◽  
Numrah Nisar ◽  
Arslan Ali ◽  
...  
Keyword(s):  
Waste Water ◽  
Aluminum Oxide ◽  
Adsorption Process ◽  
Textile Processing ◽  
Processing Industry ◽  
Tetrahedral Framework ◽  
Physical Conditions ◽  
Sorption Energy ◽  
The Matrix ◽  
As Adsorption

Abstract Various adsorbents for the removal of dyes from waste water may or may not be stable, resulting in the desorption of adsorbed dyes with slight changes in physical conditions. To avoid this problem, environmentally stable adsorbent such as activated aluminum oxide or alumina has been used for the removal of Diresul Black, which is a dye used in the textile processing industry. Fourier-transform infrared spectroscopy confirms the non-tetrahedral framework of alumina. The efficiency of alumina via adsorption implies that 1 g alumina having the Brunauer–Emmett–Telle surface area of 2.65 ± 0.25 m2/g is enough to achieve up to 85% removal of concentrated dye solution in just 20 minutes. Adsorption energy as well as adsorption capacity is calculated by different adsorption isotherms. The sorption energy E turns out to be 19.3 KJ/mol. The thermodynamic studies show that the value of ΔH for the adsorption process is −976.5 J/mol while that of ΔS is −4.748 J/mol/K. Desorption studies show that the dye remains in its adsorbed form over aluminum oxide up to a pH of 2. Various ions present in the matrix interfere with the adsorption process, however none can decrease the adsorption below 65%.

scholarly journals A Theoretical Framework on Market Orientation-firm Performance Linkage in Textile Processing Industry: Mediating Effect of Entrepreneurial Orientation

Webology ◽  
2021 ◽  
Vol 18 (Special Issue 03) ◽  
pp. 261-273
Author(s):  
Dibyendu Pal ◽  
Kumar Shalender
Keyword(s):  
Firm Performance ◽  
Organizational Performance ◽  
Conceptual Model ◽  
Market Orientation ◽  
Entrepreneurial Orientation ◽  
Mediating Effect ◽  
Textile Processing ◽  
Processing Industry ◽  
Relationship Of ◽  
The Relationship

The objective of this theoretical paper is to explore the relationship of market orientation (MO) and organizational performance in the context of Indian textile processing industry. The study also aims to construct a conceptual model which can hypothesize the relationship between market orientation, firm performance, and entrepreneurial orientation (EO). The conceptual model is drawn with the help of extant literature review of studies conducted by various authors in the area of market orientation and entrepreneurial orientation. The study presents a model depicting the inter-relationship among MO, EO and firm performance. The proposed model also propounds that the relationship between market orientation and firm performance is mediated by entrepreneurial orientation. This work will be helpful for different stakeholders of textile processing industry to understand the importance of MO and EO and their impact on the performance of the organization. Also, the proposed conceptual model showing inter-relationship among MO, EO and firm performance is an addition to the existing pool of knowledge.

scholarly journals Adsorption of Phenol from Aqueous Solution by Aminated Hypercrosslinked Polymers

2005 ◽  
Vol 23 (4) ◽  
pp. 335-346 ◽  
Author(s):  
Yue Sun ◽  
Jin-Long Chen ◽  
Ai-Min Li ◽  
Fu-Qiang Liu ◽  
Quan-Xing Zhang
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Kinetic Studies ◽  
Amino Group ◽  
Commercial Resin ◽  
The Matrix ◽  
Basic Anion Exchange Resin ◽  
Tertiary Amino ◽  
Basic Anion ◽  
Hypercrosslinked Polymeric Adsorbent

The adsorption of phenol from aqueous solution onto the hypercrosslinked polymeric adsorbent NDA-100 and its dimethylamine aminated derivatives AH-1, AH-2 and AH-3, the commercial resin Amberlite XAD-4 and the weakly basic anion-exchange resin D301 was compared. Of the tested polymers, the aminated hypercrosslinked resins had the highest adsorption capacities. The empirical Freundlich equation was successfully employed to describe the adsorption process. The specific surface area and the micropore structure of the adsorbent together with the tertiary amino group on the matrix affected the adsorption performance towards phenol. Furthermore, these factors also influenced the thermodynamic properties. Kinetic studies demonstrated that the presence of the tertiary amino group on the polymer matrix decreased the adsorption rate and increased the apparent activation energy of the adsorption process.

scholarly journals Inhibition of Pipeline Steel Corrosion in 0.5 M H2SO4 Using Cotyledon of Chrysophyllum Albidum

2020 ◽  
Vol 24 (4) ◽  
pp. 691-697
Author(s):  
E.P. Othaki ◽  
N.C. Ngobiri
Keyword(s):  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Pipeline Steel ◽  
Steel Corrosion ◽  
Langmuir Adsorption ◽  
Extract Concentration ◽  
Ir Studies ◽  
Ft Ir ◽  
As Adsorption

The corrosion inhibition characteristics of Chrysophyllum albidum cotyledon extract was studied as a green and sustainable corrosion inhibitors for pipeline steel in acidic environment attemperatures, 303,313 and 323K using gravimetric technique.The results obtained showed that the inhibition efficiency increased with increase in extract concentration but decrease with increase in temperature. The extract attained an inhibition efficiency of 94 % with 5 g/L at 303 K and 52.2 % with 1 g/L at 333K. Also increase in concentration of the extract lead to increase in activation energydepicting an exothermic process.Fourier transform infrared spectroscopy (FT-IR) studies showed the mode of inhibition as adsorption of phytochemicals from the extract on pipeline steel surface. Langmuir adsorption isotherm best fitted into the adsorption process which is spontaneous and physical. Keywords: Chrysophyllum albidum, Pipeline steel, Inhibition, Adsorption.

Pretreatment of Textile Processing Wastewaters

1990 ◽  
Vol 22 (9) ◽  
pp. 17-24 ◽  
Author(s):  
O. Tünay ◽  
O. Tameroǧlu ◽  
N. Baykal ◽  
F. Afşarünal ◽  
E. Ödemiş
Keyword(s):  
Case Studies ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Textile Processing ◽  
Processing Industry ◽  
Chemical Coagulation ◽  
Actual Treatment ◽  
Investment Cost ◽  
Processing Plants ◽  
One Year

In this paper, the pretreatment approaches in the textile processing industry are discussed and two case studies which have been carried out in two textile processing plants are delineated. Case studies include the phases of process and pollution profiles, treatability study, conceptual design and evaluation of one-year actual treatment plant performances. One of the treatment schemes applied was chemical coagulation while the other was activated sludge. Therefore a comparison of two main types of pretreatment has been realised. Results indicate that biological treatment is more efficient and reliable in terms of organic matter removal as compared to chemical coagulation. Comparisons of cost of initial investment, cost and ease of operation, and sludge production are also made and discussed.

New Treatment Methods for Waste Water Containing Chloride Ion Using Magnesium–Aluminum Oxide

2000 ◽  
Vol 29 (10) ◽  
pp. 1136-1137 ◽  
Author(s):  
Tomohito Kameda ◽  
Yoshinori Miyano ◽  
Toshiaki Yoshioka ◽  
Miho Uchida ◽  
Akitsugu Okuwaki
Keyword(s):  
Waste Water ◽  
Aluminum Oxide ◽  
Chloride Ion ◽  
Treatment Methods ◽  
New Treatment ◽  
Magnesium Aluminum Oxide

Microstructure and Interface Analysis of Glass Particulate Reinforced Aluminum Matrix Composite

2013 ◽  
Vol 795 ◽  
pp. 578-581 ◽  
Author(s):  
Shamsul Baharin Jamaludin ◽  
Josef Hadipramana ◽  
Mohd Fitri Mohd Wahid ◽  
Kamarudin Hussin ◽  
Azmi Rahmat
Keyword(s):  
Aluminum Oxide ◽  
Oxide Layer ◽  
Ageing Time ◽  
Solution Treatment ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Artificial Ageing ◽  
Micro Cracks ◽  
The Matrix ◽  
Aluminum Oxide Layer

A characterization of microstructure and interface was made on the composites Al-4 % Cu reinforced with 15 wt. % glass particulate. The composite was fabricated by powder metallurgy followed by solution treatment and artificial ageing. The microstructures of the composite showed that the glass particulates were in-homogenously distributed in the matrix and segregated near copper. The aluminum oxide layer was found between aluminum, copper and glass particulate. Micro cracks were observed in the aluminum oxide layer and at the interface between aluminum oxide layer and aluminum. Hardness increased as ageing time increased. Interface behavior and aging time influenced the hardness of the composite.

scholarly journals Correlation of composition, aspect ratio and magnetic resistance of multilayer micro- and nanowires of the “ferromagnetic / diamagnetic” type

Doklady BGUIR ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 5-13
Author(s):  
V. M. Fedosyuk
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Aspect Ratio ◽  
Aluminum Oxide ◽  
Giant Magnetoresistance ◽  
Pore Diameter ◽  
Ferromagnetic Layer ◽  
Type I ◽  
Magnetic Layers ◽  
The Matrix

 The results of study of the giant magnetoresistance coefficient (GMR) in multilayer micro- and nanowires based on successively alternating ferromagnetic (Co, CoNi and NiFe) and diamagnetic (Cu) layers are presented in the paper. The samples were obtained by electrochemical deposition into the matrix pores. Aluminum oxide was used as matrices. To establish the influence of the aspect ratio, matrices of two types were used: with a pore diameter of 8 µm and 170–200 nm and a variable thickness from 10 to 60 µm. Investigations of the GMR coefficient were carried out by measuring the current-voltage characteristics in external magnetic fields up to 130 mT. When using type I matrices (pore diameter 8 μm), a positive GMR coefficient (an increase in electrical resistivity in an external magnetic field) was noted, while when using type II matrices (pore diameter 170–200 nm), a negative GMR coefficient was established (a decrease in electrical resistance in an external magnetic field). This is due to the enhancement of the interactions of spin-polarized electrons in the magnetic layers through the copper layer through the RKKY exchange with an increase in the aspect ratio. A significant effect of the composition of the ferromagnetic layer (Co, CoNi, and NiFe) on the value  of the GMR coefficient is noted. The maximum value of the negative GMR coefficient (up to –27.5 %) was established for the CoNi-based nanowire system. The use of multilayer micro- and nanowires, electrolytically deposited in a matrix of aluminum oxide with the ability to control the GMR coefficients, opens up perspective use of these objects as sensitive elements (sensors) of a constant magnetic field, as well as devices for storing magnetic information with a vertical principle. 

scholarly journals EFEKTIVITAS KOMBINASI MIKROORGANISME DAN TUMBUHAN AIR Lemna minor SEBAGAI BIOREMEDIATOR DALAM MEREDUKSI SENYAWA AMONIAK, NITRIT, DAN NITRAT PADA LIMBAH PENCUCIAN IKAN

2016 ◽  
Vol 5 (3) ◽  
pp. 80-90
Author(s):  
Alfian Dony Saputra ◽  
Haeruddin Haeruddin ◽  
Niniek Widyorini
Keyword(s):  
Waste Water ◽  
Aquatic Plant ◽  
Lemna Minor ◽  
Outer Part ◽  
Biological Method ◽  
Fish Processing ◽  
Processing Industry ◽  
Effectiveness Analysis ◽  
Main Variable ◽  
Negative Effect

ABSTRAK Limbah pencucian ikan bersumber dari kegiatan pencucian bagian luar dan dalam tubuh ikan. Limbah pencucian ikan memiliki kandungan senyawa amoniak, nitrit, dan nitrat yang tinggi sehingga kemungkinan mempunyai efek negatif bagi lingkungan. Sebagian besar industri pengolahan ikan belum melakukan pengolahan limbah cairnya dengan baik. Bioremediasi merupakan metode biologi dengan memanfaatkan mikroorganisme dan tumbuhan air Lemna minor dalam pengolahan air limbah. Penelitian ini bertujuan untuk mengetahui efektivitas dan pengaruhdari kombinasi mikroorganisme dan Lemna minor dalam mereduksi senyawa amoniak, nitrit, dan nitrat pada limbah pencucian ikan. Metode penelitian yang digunakan adalah eksperimen skala laboratorium dimana wadah percobaan berisi limbah pencucian ikan dengan volume 1 Liter. Desain penelitian yang digunakan yaitu percobaan faktorial 3 x 3 dengan 2 faktor, sehingga terdapat 9 kombinasi perlakuan M1L10, M1L50, M1L100, M5L10, M5L50, M5L100, M10L10, M10L50, dan M10L100, dimana “M” faktor konsentrasi mikroorganisme (1 mL/L, 5 mL/L, 10 mL/L), sedangkan “L” faktor bobot biomassaLemna minor (0,0255 gr/cm2, 0,1273 gr/cm2 , 0,2546 gr/cm2). Variabel utama penelitian adalah amoniak, nitrit, dan nitrat yang didukung oleh temperatur, pH, dan oksigen terlarut. Analisis data dengan menggunakan analisis efektivitas, uji two way Anova, dan uji Beda Nyata Jujur. Hasil penelitian menunjukkan bahwa nilai efektivitas berkisar antara 40,85% - 74,03% (amoniak), 42,21% - 74,10% (nitrit), dan 3,19% - 34,65% (nitrat). Pengaruh interaksi kombinasi mikroorganisme dan Lemna minor yaitu terdapat pengaruh yang nyata dan efektif dalam mereduksi senyawa amoniak, nitrit, dan nitrat pada limbah pencucian ikan. Kata Kunci: Amoniak; Bioremediasi; Lemna minor; Limbah Pencucian Ikan; Mikroorganisme; Nitrat; Nitrit ABSTRACT Fish washery waste derived from washing inner and outer part of fish body.Fish washery waste containshigh ammonia, nitrite, and nitrate which may have negative effect for the environment.Most of the fish processing industry are not doing the processing of waste water properly yet. Bioremediation is a biological method by using microorganisms and aquatic plant Lemna minor in wastewater treatment. The aims of study is to determine the effectiveness anda effect of the use of microorganism and Lemna minor combination in effort to reduce ammonia, nitrite, and nitrate compound in fish washery waste. The method used is laboratory-scale experiments where the experimental containers containing fish washery waste with a volume of 1 Liter. 3 x 3 factorial with 2 factor method design were used, so there are nine treatment combinations of M1L10, M1L50, M1L100, M5L10, M5L50, M5L100, M10L10, M10L50, and M10L100, where "M" forconcentrationof microorganisms factor (1 mL/L, 5mL/L, 10 mL/L), while the "L" for biomass weight of Lemna minorfactor (0,0255 gr/cm2, 0,1273 gr/cm2 , 0,2546 gr/cm2). The main variable of this study are ammonia, nitrite, and nitrate supported by temperature, pH, and Dissolved Oxygen. The data was analyzed using effectiveness analysis, two way Anova, and Least Signifficant Difference methode. The results show that the concentration of ammonia, nitrite, and nitrate decreased after 96 hours for all treatmentscombination. The effectiveness value, ranged between 40.85% - 74.03% (ammonia), 42.21% - 74.10% (nitrite), and 3.19% - 34.65% (nitrate). There is a signifficant influence and effective in combination of microorganisms and Lemna minor to reduce ammonia, nitrite, and nitrate compound in fish washery waste. Keywords: Ammonia; Bioremediation; Lemna minor; Fish Washery Waste; Microorganism; Nitrate;Nitrite

scholarly journals Decolorization of a textile vat dye by adsorption on waste ash

2010 ◽  
Vol 75 (6) ◽  
pp. 855-872 ◽  
Author(s):  
Miodrag Smelcerovic ◽  
Dragan Djordjevic ◽  
Mile Novakovic ◽  
Mirjana Mizdrakovic
Keyword(s):  
Waste Water ◽  
Textile Industry ◽  
Low Cost ◽  
Langmuir Model ◽  
Order Kinetic ◽  
Dyeing Process ◽  
Vat Dye ◽  
As Adsorption ◽  
Heating Station ◽  
Physical And Chemical

An adsorption process using cheap adsorbents could be described as a simple, selective and low cost alternative for the treatment of colored waste water compared to conventional physical and chemical processes. In this study the use of a natural waste adsorbent - ash was investigated for the removal of a textile vat dye Ostanthren Blue GCD remaining after the dyeing of cotton textile. The ash obtained as a waste material during the burning of brown coal in the heating station of Leskovac (Serbia) was used for the treatment of waste waters from the textile industry, i.e., waste water after the dyeing process. The effect of ash quantity, initial dye concentration, pH and agitation time on adsorption was studied. The Langmuir model was used to describe the adsorption isotherm. Based on the analytical expression of the Langmuir model, the adsorption constants, such as adsorption capacity and adsorption energy, were found. Pseudo first and second order kinetic models were studied to evaluate the kinetic data.

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