Search or add a thesis

Advanced Search (Beta)
Home > Removal of Direct Dyes from Synthetic Effluents by Agro-Industrial Wastes: Batch and Column Studies

Removal of Direct Dyes from Synthetic Effluents by Agro-Industrial Wastes: Batch and Column Studies

Thesis Info

Access Option

External Link

Author

Sadaf, Sana

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2014

Thesis Completion Status

Completed

Subject

Chemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/1143

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727079248

Asian Research Index Whatsapp Chanel
Asian Research Index Whatsapp Chanel

Join our Whatsapp Channel to get regular updates.

Similar


The present study was designed to remove five different direct dyes (Direct Violet 51, Indosol Turquoise FBL, Indosol Black NF, Indosol Yellow BG and Indosol Orange RSN) from aqueous solutions by using agro-industrial waste materials (sugarcane bagasse, peanut husk, corn cobs, cotton sticks and sunflower) in batch and column mode. The batch mode study was performed to compare the biosorption potential of native, pretreated and immobilized forms of biosorbents for the removal of direct dyes. Important process parameters like pH, contact time, biosorbent dose, initial dye concentration and temperature were optimized during batch experiments. The results revealed that low pH, low biosorbent dose and low temperature were the feasible conditions for maximum removal of dyes. The pretreated form of biosorbents depicted highest biosorption capacity (39.6 mg/g for Direct Violet 51, 65.09 mg/g for Indosol Turquoise FBL, 89.6 mg/g for Indosol Black NF, 79.5 mg/g for Indosol Yellow BG and 79.7 mg/g for Indosol Orange RSN) as compare to native and immobilized form of biosorbents. The experimental data of all the five dyes was subjected to different kinetic models and pseudo-second order kinetic model was found to be best fit on the experimental results. Different equilibrium isotherms were applied on the data to explain the mechanism of biosorption and Langmuir adsorption isotherm model fitted very well on the experimental results for all the dyes. Thermodynamic study showed that biosorption process was feasible at lower temperatures as indicated by lower values of ∆G. The negative values of ∆H indicated that biosorption process was exothermic in nature. The column mode experiments were conducted to optimize the bed height, flow rate and initial dye concentration. Higher bed heights, lower flow rates and higher initial dye concentrations were found to be favorable conditions for maximum dye removal in column mode study. Box-Behnken experimental design was used to investigate the main and interaction effects of three important parameters like initial dye concentration, biosorbent dose and pH on the removal of direct dyes and results were analyzed by ANOVA and p-values. The biosorption process was also applied on the real textile effluents for the efficient removal of COD. Characterization of biosorbents was carried out by FT-IR and SEM analysis. The results revealed that agricultural waste materials have high biosorption capacities for the removal of dyes from wastewaters.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

سلام

سلام
قائد عوام شہید ذوالفقار علی بھٹو کا قتل حقیقت میں روشنی کا قتل ہے ۔وہ روشنی جسے پاکستان دکھانے کے لیے پاکستان کے محنت کش ۔پاکستان پیپلز پارٹی کے جھنڈے تلے ایک ہوئے اور پھر 4اپریل 1979ء کو غریبوں کی اس روشنی کو قتل کر دیاگیا ۔

 

An Introduction to Islamic Modes of Financing for Elimination of Interest Based Transactions in Banking Sector of Pakistan

The Economic system ofIslam is very balanced one. Islam does not deprive a person to take benefit of all halal (permissible) things, while it has banned all illegal means of earning like deceit, corruption, gambling, etc. Among all evils, interest/usury is the worst form of earning and those who are involved in transactions based on it, they have been threatened with hell. While on the other hand, in most banks and other financial institutions, transactions are carried out on the basis ofinterest. This is why Muslim scholars worked out alternative modes based on Islamic financing to replace interest-based transactions. In this article six modes of financing i. e. Musharakah. , Mudharabah, Murabahah, Ijarah, Salam and Istisnah have been discussed. If these Islamic inodes of financing are adopted in banking sector and in otherfinancial institutions, then it is hoped that in a very short span of time elimination ofriba would be possible.

Effect of Plant Growth Promoting Rhizobacteria Pgpr and Cytokinins on the Growth and Yield of Wheat Triticum Aestivum L. under Drought

Drought effects plant internal functions as the constraint for production. Different strategies are using to mitigate it. Plant growth promoting rhizobacteria (PGPR) and cytokinins (CK) plays important role under water stress and help to enhance crop growth. Seed inoculation with PGPR is increase soil fertility. Growth hormones like cytokinins improve plant functions and actual yield through exogenous application. To determine the effect of PGPR and cytokinins on the growth and yield of wheat under drought, planned wire house and field experiment were arranged at the research area of Agronomy Department, The Islamia University of Bahawalpur. Four wire house experiments and three field experiments were set, to check PGPR and CK effecr wheat growth and yield under drought. First wire house experiment was the screening of best genotype of wheat variety in drought. 10 different wheat varieties (V1= Aas-2011, V2= Mairaj-2008, V3= Fareed-2006, V4= Punjab-2011, V5= Lasani-2008, V6= Faisalabad-2008, V7= Galaxy2013, V8= Millat-2011, V9= AARI-2011, V10= Uqaab-2000) were used for screening under water deficit stress at tillering, anthesis and grain filling stage to identify best genotype under drought stress under agro ecological conditions of Bahawalpur. Galaxy2013 was observed the highest yielding variety under drought stress among them. It was also noticed that drought stress damaged crop functions and growth. Second experiment was to identify the best PGPR strain. Azospirillum, Bacillus, Rhizobium, Pseudomonas, Enterobacter and Moraxella were isolated from soil rhizosphere of Acacia nilotica under. A. brasilense Azo-1 was selected as a best PGPR strain among them. Next experiment was carried in both wire house and field entitled, “Cytokinins applied under drought stress to improve growth and physiological efficiency of wheat (Triticum aestivum L.)”. Seven treatments were used in experiment (To =Control, T1 =Drought at tillering, T2 =Drought at tillering + CKs Application, T3 =Drought at anthesis, T4 = Drought at anthesis + CKs Application, T5 = Drought at grain filling, T6 = Drought at grain filling + CKs Application). 5th experiment (wire house) was arranged to investigat the effect of Azospirillum brasilense and Rhizobium pisi on agronomic traits of wheat (Triticum aestivum L.) and results showed that co-inoculation gives the best results. 6th experiment was carried under field condition entitled, “Use of Azospirillum brasilense as a drought management tool in wheat crop” and noticed that A. brasilense inoculated wheat plants under drought showed more yield as compared to un-inoculated treatments. 7th, 2 years experiment was arranged to investigate the combine effect of PGPR and CK under drought stress in wheat crop. 13 treatments were used (To=Control, T1=Drought at tillering, T2=Drought at tillering +PGPR, T3=Drought at tillering +CKs, T4 = Drought at tillering +PGPR+CKs, T5 = Drought at anthesis, T6=Drought at anthesis +PGPR, T7=Drought at anthesis +CKs, T8=Drought at anthesis +PGPR+CKs, T9 = Drought at grain filling, T10 = Drought at grain filling +PGPR, T11 = Drought at grain filling+ CKs, T12 = Drought at grain filling +PGPR+CKs) in this experiment having three replications. Combined application of PGPR and CK is more beneficial for alleviation of drought. 5.90%, 3.49%, 4.09% and 6%, 8.51%, 4.07% more grain yield was recorded during 2016-17 and 2017-18 respectively, by combine application of PGPR and CK under drought. Beneficial bacteria colonize the rhizosphere impart drought tolerance. CK participate in removing of ROS from the cell and increases antioxidant enzymes during drought stress so plant growth and yield improved under such condition.