Post-treatment of Produced water before discharge using luffa cylindrica (original) (raw)
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Removal of Heavy metals from Produced Water Using of Biosorption techniques
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Oil and grease, temperature, pH, and heavy metal concentrations are some of the main quality parameters used in the regulation of the discharge of oil and gas field produced water to the environment. The use of cheap biological plant materials to selectively remove heavy metals from aqueous solutions is considered a potentially viable alternative to expensive ion-exchange resins and semi-permeable membranes. However, a key requirement for the efficient and cost-effective application of biosorption systems to industrial-scale wastewater treatment is the ability to regenerate and reuse biological sorbents used for the ion uptake. This paper presents a case study of the application of biosorption to sample produced water from an oil field in the Niger Delta. The produced water was characterised for both heavy metal concentration and other quality indices. Using batch adsorption system, with raw and pre-treated sawdust as adsorbent, uptake of heavy metal ions was investigated. The analy...
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Luffa cylindrica, readily available in parts of Asia, Africa and South America, when chemically treated with 4% NaOH shows an increased amount of ion exchange functionality, thereby enhancing the adsorption capacity. It is well known for loofa sponge production and it is regarded as a common waste material. Chemical modification of Luffa cylindrica also changes its structural characteristics by exposing its pores for enhanced adsorption and shows an increased BET surface area from 25.32 m2/g to 43.10m2/g. From the FT-IR spectra an increase in protonated hydroxyl and carboxyl functional groups was observed. The adsorption of Pb2+ onto alkali treated Luffa cylindrica (ATLC) was investigated in batch experiments as a function of pH, temperature, initial metal ion concentration and ionic strength. The ATLC was found to be the more effective in removing Pb2+ from aqueous solution as compared to the neutral treated Luffa cylindrica. Adsorption kinetic and isotherm models, pseudo second or...
Egyptian Journal of Aquatic Biology and Fisheries, 2022
1-Marine Chemistry Lab, Marine Environment Division, National Institute of Oceanography and Fisheries, NIOF, Cairo, Egypt. 2-Environmental Sciences Department, Faculty of Science, Damietta University, Egypt. 3-Ecology Department, Natural Resources and Environment Faculty, Omer Almokhtar University, Libya. Corresponding author: m_okbah@yahoo.com __________________________________________________________________________________
A study of removal of heavy metal ions from heavy metal contaminated water using agro-waste was carried out with Musa paradisiaca peels as test adsorbent. The study was carried by adding known quantities of lead (II) ions and cadmium (II) ions each and respectively into specific volume of water and adding specific dose of the test adsorbent into the heavy metal ion solution, and the mixture was agitated for a specific period of time and then the concentration of the metal ion remaining in the solution was determined with Perkin Elmer Atomic absorption spectrophotometer model 2380. The effect of contact time, initial adsorbate concentration, adsorbent dose, pH and temperature were considered. From the effect of contact time results equilibrium concentration was established at 60minutes. The percentage removal of these metal ions studied, were all above 90%. Adsorption and percentage removal of Pb 2+ and Cd 2+ from their aqueous solutions were affected by change in initial metal ion concentration, adsorbent dose pH and temperature. Adsorption isotherm studies confirmed the adsorption of the metal ions on the test adsorbent with good mathematical fits into Langmuir and Freundlich adsorption isotherms. Regression correlation (R 2) values of the isotherm plots are all positive (>0.9), which suggests too, that the adsorption fitted into the isotherms considered.
Energy Procedia, 2011
The accumulation of toxic industrial waste has become for man and his environment, a topical problem. Organic products come in a large share of this pollution, and their elimination is the subject of much research. It exists in the literature of many studies on plant fibers, but very few are devoted to the study of fibers of the luffa Cvlindrica, hence the idea of directing a study in this direction. Indeed, Luffa cylindrica is an annual herb of the family Cucurbitaceae fruit gives slightly angular cylindrical shape of variable size. In the first step, we studied the kinetics of adsorption system (copper / fiber of Luffa cylindrica) using copper pollution model and method of analysis as UV spectrophotometry, the estimation of specific surface area (0.082 m 2 /g) revealed a porous biomaterial too, although its maximum adsorption capacity (0.101 mg/g) under optimal conditions is low. In the second step two comparative models (Langmuir and Freundlich) were tested for the adsorption isotherms obtained. We completed this work by studying the possibility of regeneration (30.2 %) and reuse this material. For that several parameters were optimized: the nature of the desorbent, the pHi 1.5, and the content of Luffa cylindrica desorbing, hence the method and very promising for the treatment of water laden with heavy metals. It allows them to concentrate and recover in a smaller volume, making the process more economical.
Removal of heavy metal ions from some wastewater by using different agricultural wastes
Annals of Agricultural Science, Moshtohor, 2018
Industrial wastewaters are deposed into the River Nile without any treatment. High concentrations of some heavy metals i-e Ni +2 , Cu +2 , Zn +2 , CO +2 and Cd +2 , promate the growth of gelatinous masses and hence cause industrial and agriculture problems. Polluted water may cause many health problems such as liver and kidney diseases. The aim of the present study is an attempt to removal heavy metals in industrial wastewater. Also, evaluation of some agricultural wastes such as orange peels, banana peels and leaves of date trees as biosorbent to remove the heavy metals which presenting from wastewater such as nickel (Ni +2), copper (Cu +2), zinc (Zn +2), lead (pb +2), cobalt (CO +2) and cadmium (Cd +2) by using prepared active carbons from the above-mentioned materials of different agricultural wastes in batch adsorption process. Proximate, chemical components of lignocellulosic wastes under investigation were determined. Also, physical and chemical preparation of wastewater and the produced active carbons from different agro-wastes were evaluated. On the other hand, the activated carbons from different agro-wastes were used as biosorbents for removal of some above-mentioned heavy metals before deposing in wastewater.
Removal of Heavy Metals from Water
2020
Heavy metal pollution has become one of the most serious environmental problems globally. The removal of heavy metals from the environment is of special concern due to their persistence in the environment. Yet conventional techniques for removing these metals are very expensive and impractical for use in many parts of the developing world. Researchers therefore continue to explore cheaper, but effective techniques. The research presented in this book explores the use of raw coconut shell powder in removing heavy metals via biofiltration, and compares its effectiveness to that of activated coconut shell powder. Simple charring and activation procedures were followed to produce calcium chloride activated charcoal from dried coconut shells. Both the activated and raw coconut shell powder were effective in the removal of zinc (Zn), lead (Pb), copper(Cu), mercury (Hg) and arsenic (As) from contaminated water. The results suggest that coconut shell powder could be used as relatively inexp...