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Utilization and Removal of Surfactant and Dyes from the Waste Water by Chemical and Physical Methods

Thesis Info

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Author

Sultan, Muhammad

Program

PhD

Institute

University of Karachi

City

Karachi

Province

Sindh

Country

Pakistan

Thesis Completing Year

2012

Thesis Completion Status

Completed

Subject

Chemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2274/1/2796S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727651034

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The control of water pollution has become of increasing interests because it is associated with the life of human beings, animals and the land which is irrigated with it. Water pollution has many dimensions and types but pollution due to industrial wastes is commonly metal pollution and chemical pollution. The present study emphasizes the water pollution and composites present in waste water like dyes and surfactants. Dyes are the main component of the dyeing industries so the effluent carrying high content of dyes along with other composites. It is quite difficult to remove dyes from effluents since most of them are stable to light, heat and oxidizing agents and they are biologically non-degradable also. Whereas the surfactants are the major part of every washing and cleaning agents like soaps, washing powder, dish washing bars, toothpastes and widely used in textile industry as softener. So both dyes and surfactants are the major constituent of domestic and industrial waste water. The treatment of contaminated waste water is necessary before it enter into the stream, lake, river or sea. The disposal of wastes containing dyes and surfactants into receiving water bodies effects on the values of biological oxygen demand (BOD) and chemical oxygen demand (COD) which resulted toxicity of aquatic life. In the current study by employing physical and chemical treatment methods utilization and removal of surfactant and dyes were carried out. The physical treatment method like adsorption technique was adopted by using natural materials and their modified surfaces for the removal of dyes and surfactant. The physical treatment method is beneficial for the removal and the regeneration of adsorbed substances. It is also economical and low cost method and can be employed on industrial scale before the disposal of waste into the stream and other reservoirs. The efforts were done by developing a model system for the removal of surfactant Cetylpyridinum Chloride (CPYCl) and dyes Malachite Green 11 (MG), Methylene blue (MB), Fast Green (FG) from aqueous solution by adopting batch adsorption method. The Cetylpyridinum Chloride (CPYCl) is the main constituent of daily washing powder and the dyes Malachite Green (MG) and Methylene blue (MB) are used in textile and paper industries and Fast Green (FG) dye widely used in food industries. The adsorbents were used for the removal of surfactant and dyes are raw Charcoal (RC), marine Algea like Ulva Lactuca (UL) and Sargassum Muticum (SM), Used Black tea (UBT), and impregnated used black tea (IM-UBT). Raw Charcoal was prepared from coconut dry shells, the algae Ulva Lactuca (UL) and Sargassum Muticum (SM) were collected from sea shore near the Clifton beach of Arabian Sea while Used Black tea (UBT) were collected from tea canteens as it is waste material after making tea and used for adsorption purposes. The modified surface of UBT were prepared by impregnation technique and their nano composites were prepared by impregnation with lead nitrate Pb(NO3)2. The batch adsorption experiments were run and effect of amount of adsorbents, concentration of adsorbate, contact time and temperature were investigated. Spectrophotometric technique was adopted for the measurement of concentration of dyes before and after adsorption. The adsorption data were fitted in the adsorption models like Langmuir, Freundlich and Dubinin- Radushkevich adsorption isotherm equations and the values of their respective constants were evaluated. Thermodynamic parameters such as (ΔG) free energy, (ΔH) enthalpy, and (ΔS) entropy of the system were calculated. Mean free energy of sorption (Es) was also estimated in order to get the clear picture of energy exchange between the adsorbate and adsorbent using D-R adsorption isotherm equation. The values of % removal show that adsorption of surfactant (CPYCl) and dyes (MG), (MB) and (FG) on the natural and modified adsorbents show about 70% - 80% removal tendency. The chemical treatment method was adopted for the decoloration of dye effluent by the photoreduction method. The reduction kinetic was studied for all the dye systems but fast green (FG) show dominating results. It is evenly widely used for domestic and industrial purposes and also it is a representative of its acidic group dyes. The rate of the reaction was determined by varying concentration and temperatures of dye, surfactant and base (NaOH) at 303K to 323 K at the step of ± 5 °C. It was observed that the reduction followed pseudo first-order kinetics with respect to dye, surfactant, and OH– ion concentration .The mechanism for the photo bleaching of the dye has been proposed and well confirmed by the data simulation procedure. The activation parameters of the reaction like entropy of activation (ΔS) and free energy of activation (ΔG) showed the extremely solvated states of transient complex which was less disorderly arranged than the oxidized form of dye, whereas energy of activation Ea values reflects a high amount of energy required for the reduction of dye with surfactant cetylpyridinum chloride. The % decolorations of dyes were obtained about 70 to 80%. It was concluded that if the effluent contains acidic dyes and the cationic surfactant simultaneously, the dye will reduced by the surfactant and in this manner that surfactant in waste will also be utilized to reduce the harmful effects of dyes. It is an economical and cost effective method to utilize waste material for the purification of effluent also we can regenerate these adsorbents for the further treatment process. By employing impregnation technique nano composites were prepared from waste material and they show better adsorption tendency as compared to commercial adsorbents. The purification of waste water was carried out by employing physical method like adsorption and chemical method by reduction kinetics technique so we can simulate the model for the recycling of solid -liquid waste and we save the environment with harmful pollutants.
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مولانامفتی محمود احمد نانوتوی

مولانا مفتی محمود احمد نانوتوی
افسوس! گزشتہ مہینہ ہمارے شبستان دارالعلوم دیوبند کے دو اور روشن چراغ بجھ گئے۔ مولانا مفتی محمود احمد صاحب نانوتوی ناتوتہ کے ایک اعلیٰ اور شریف خاندان کے فردِ فرید تھے۔ تعلیم دیوبند میں پائی تھی، اولاً حضرت شیخ الہند اور پھر حضرت الاستاذ مولانا محمد انورشاہ الکشمیری سے خاص استفادہ کیااوران سے تلمذ خصوصی کاتعلق رکھتے تھے ۔علم وفن کی پختہ استعداد وزہد وورع اوراخلاق فاضلہ، یہ تینوں اوصاف بزرگان دیوبند کے امتیازی کمالات تھے۔ مفتی صاحب بھی ان کے جامع تھے ۔لیکن انھوں نے فقہ اورحدیث کواپنا خاص فن بنالیا تھااور ان میں ان کی نظر بڑی دقیق اور غامض تھی۔ایک عرصہ سے اجین میں قیام پذیر تھے۔وہاں کی مسلم اورغیرمسلم آبادی کوانھوں نے اپنے علم وفضل اور کردار سے کس درجہ عقیدت مند بنالیا تھااس کااندازہ اس سے ہوگا کہ جب ان کا جنازہ اٹھاہے تو تنگیِ وقت کے باوجود کم وبیش پندرہ ہزار آدمی اس کے جلوس میں تھے اور ان میں جن سنگھی بھی تھے ۔ دارالعلوم کی مجلس شوریٰ کے دیرینہ رکن تھے اور اس کی ہر ممکن خدمت کواپنا فرض سمجھتے تھے۔ حضرت شاہ صاحب سے عقیدت کیا ان کے نام کے عاشق تھے۔مجلس میں جب کبھی حضرت الاستاذ کاذکر چھڑ جاتا تو دوسروں کی باتیں بڑی توجہ اوردل چسپی سے سنتے اور پھر جب خود بولنا شروع کرتے توعالم ہی عجیب ہوتا جس کو سن کردل ودماغ دونوں روشن ہوجاتے تھے۔ رحمہ اﷲ رحمۃً واسعۃ۔
[فروری ۱۹۶۹ء]

Elimination of Poverty Through Islamic System of Sadaqaat: Research Study

Islam is a complete code of life. Economic teachings of Holy Qur’an and Hazrat Muhammadﷺ are comprehensive. Allah Almighty guides us how to spend money in His way. There are two types of Sadaqaat. Sadaqaat-e-Wajibah are compulsory on wealthy people with certain ratio while Sadaqaat-e-Nafilah are optional. Holy Prophetﷺ encouraged his followers to help the needy. Eradication of poverty is the main goal of Islamic system of Sadaqaat. In this research paper an analytical study is made to know how economic issues of the poor are addressed by Islamic economic system. There is dire need to understand different kinds of Sadaqaat. If the government and the public feel their responsibilities and follow Islam, poverty can be eliminated from society. This article addresses the problems of poverty. Moreover, it is also told how the poor should be looked after. Key words: Holy Qur’an, Holy Prophet ﷺ, Economy, Sadaqaat, Poverty.

Adaptive Capacity, Adaptation to Climate Change and Farm Productivity: Evidence from Pakistan

Assesment of vulnerability of a community to climate change requires a holistic understanding of the exposure, sensitivity and adaptive capacity of that particular community. The extant literature on the issue emphasizes importance of enhancing the adaptive capacity of households to improve their resilience to climate change. This study intends to analyze the factors that could define the adaptive capacity of the farming communities of Pakistan.Moreover, role of adaptive capacity in adaptation to climate change and then indirectly its influence on the yield of the major crops of Pakistan has also examined. The accomplishment of above mentioned goals entails a series of analyses.To identify the factors that influence households’ adaptive capacity, we constructed composite Household Adaptive Capacity Index (HACI). The index is constructed by employing assets based approach of Sustainable Livelihood Framework (SLF), where assets are categorized as human, physical, social, and natural capital. SLF views that availability of these assets enables people to respond to climate indicators and other stresses. This part of analysis helps to identify the factors needed to target in order to enhance the adaptive capacity of the households, hence to increase resilience of farmers to climate change. Given the fact that adaptive capacity of farm households functions as the driving force for adaptation, the analysis was further extended to study the adaptation decision and adaptation strategies undertaken. We study the impact of adaptive capacity on decision to adapt and, further examine thereof the expected increase in crop output when farmers are adapting to climate change. To evaluate the influence of different adaptation strategies—in isolation or in combination— on crops productivities, Multinomial Endogenous Switching (MES) Regression model is employed. This technique is adopted to account for the heterogeneity in the decision to adapt or not. Analysis to understand the impact of adaptation to climate change on yield was limited to four major crops of wheat, basmati rice, cotton, and sugarcane. It is asserted here that the analysis was controlled for socioeconomic and demographic characteristics shaping the adaptive capacity and adaptations of the farming community. The findings demonstrate a great deal of IX inequality in adaptive capacity in Pakistan especially among farm households of Sindh compared to Punjab and KPK. The findings further suggest that farmers should be assured with the provision of low-interest rate loans so that they could opt for off farm business, hence improve their livelihood portfolio and reduce dependence on farming. More resources should be deployed on the improvement of health status of farm households, quality of the houses, and provision of gas as a source of cooking. Social security should be provided to decrease the burden on bread winners from elderly and non-working members. Obstacles in effective linkages and collaboration with social groups and networks should be highlighted and removed. Gender should be taken seriously in climate change adaptation, with the provisions of rights and opportunities for the women in rural areas. In order to remove obstacles in farmers’ adaptation to climate change policies should be designed to increase the farm size, quality of extension centers and of the sources of information on climate change, and farmers’ should be facilitated with easy access to credit. Findings of the study further highlight that maximum gains in yield of wheat could be gained by introducing changes in irrigation practices. While, basmati rice producers could earn these gains by adapting the combination of input intensification and irrigation change. The evidence further suggest that cotton producers could receive maximum benefits from an adaptation by combining the change in time of sowing, input intensification and change in the irrigation practice. However, highest gains in the yield of sugarcane could be received when farmers adapt in the combination of input intensification, irrigation change, and varietal change