scholarly journals Development of an adsorbent for the remediation of crude oil polluted water using stearic acid grafted coconut husk (Cocos nucifera) composite

2021 ◽  
Vol 6 ◽  
pp. 100179
Author(s):  
Christian O. Asadu ◽  
Ezema Chinonso Anthony ◽  
Onu Chijioke Elijah ◽  
Innocent Sunday Ike ◽  
Ohimor Evuensiri Onoghwarite ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Crude Oil ◽  
Cocos Nucifera ◽  
Polluted Water ◽  
Coconut Husk

scholarly journals Treatment of crude oil polluted water using stearic acid grafted mango seed shell (Mangifera indica) composite

2021 ◽  
Vol 4 ◽  
pp. 100169 ◽  
Author(s):  
Christian O. Asadu ◽  
Onu Chijioke Elijah ◽  
Nick O. Ogbodo ◽  
Ezema Chinonso Anthony ◽  
Chime Thomson Onyejiuwa ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Crude Oil ◽  
Mangifera Indica ◽  
Polluted Water ◽  
Mango Seed

scholarly journals 1. On Certain Products of Decomposition of the Fixed Oils in Contact with Sulphur.

1851 ◽  
Vol 2 ◽  
pp. 134-136
Author(s):  
T. Anderson
Keyword(s):  
Oleic Acid ◽  
Stearic Acid ◽  
Crude Oil ◽  
Organic Compounds ◽  
Free State ◽  
Organic Substances ◽  
Simple Distillation ◽  
Crystalline Product ◽  
Sulphuretted Hydrogen

The investigations contained in this paper were undertaken with the view of ascertaining the nature of the action of sulphur in the free state on organic substances. The author endeavoured, in the first instance, to examine the action of that agent upon some of the simpler organic compounds, but without obtaining any definite results; and finally confined his experiments entirely to the fixed oils.The distillation of oil of almonds with sulphur, which is attended by the violent evolution of sulphuretted hydrogen, afforded a peculiar nauseous oil, and a crystalline product deposited on cooling from the latter portions of the oil. In order to ascertain the source of these products, comparative experiments were made with pure stearic and oleic acids. It was thus found, that stearic acid, when distilled with sulphur, gave products identical with those obtained by its simple distillation, but that oleic acid gave an oily fluid and crystals similar to those produced from the crude oil.

scholarly journals Specific Cutting Force Analysis of Young Coconut Husk (Cocos nucifera)

2014 ◽  
Vol 02 (2) ◽  
pp. 89-95
Author(s):  
Tika Hafzara S ◽  
◽  
Desrial Desrial ◽  
Dyah Wulandani ◽  
◽  
...  
Keyword(s):  
Cutting Force ◽  
Cocos Nucifera ◽  
Force Analysis ◽  
Specific Cutting Force ◽  
Coconut Husk

scholarly journals Enhanced bioremediation of crude oil polluted water by a hydrocarbon-degrading Bacillus strain immobilized on polyurethane foam

2020 ◽  
Vol 18 (3) ◽  
pp. 581-588
Author(s):  
Kieu Thi Quynh Hoa ◽  
Nguyen Vu Giang ◽  
Nguyen Thi Yen ◽  
Mai Duc Huynh ◽  
Nguyen Huu Dat ◽  
...  
Keyword(s):  
Crude Oil ◽  
Petroleum Hydrocarbons ◽  
Immobilized Cells ◽  
Polluted Water ◽  
Contaminated Water ◽  
Bacillus Sp ◽  
Microbial Cells ◽  
Bacillus Strain ◽  
Enhanced Bioremediation ◽  
Marine Environmental

During the production and transportation of petroleum hydrocarbons, unsuitable operation and leakage may result in contamination of water and soil with petroleum hydrocarbons. Petroleum contamination causes significant marine environmental impacts and presents substantial hazards to human health. Bioremediation of contaminated water and soil is currently the effective and least harmful method of removing petroleum hydrocarbons from the environment. To improve the survival and retention of the bioremediation agents in the contaminated sites, microbial cells must be immobilized. It was demonstrated that immobilized microbial cells present advantages for degrading petroleum hydrocarbon pollutants compared to free suspended cells. In this study, the ability of a Bacillus strain (designed as Bacillus sp. VTVK15) to immobilize on PUF and to degrade crude oil was investigated.  The immobilized Bacilllus strain had the highest number (5.38 ± 0.12 Í 108 CFU/g PUF) and a maximum attachment efficiency of 92% on PUF after 8 days. Analysis by GC-MS revealed that both free and immobilized cells of Bacillus sp. VTVK15 were able to degrade 65 and 90% of the hydrocarbons in 2% (v/v) crude oil tested after 14 days, respectively. The results suggest the potential of using PUF-immobilized Bacillus sp. VTVK15 to bioremediate petroleum hydrocarbons in an open marine environment.

scholarly journals Bioremediation of Oil-Contaminated Brackish Salty Water and its Safe use in the Cultivation of Woody Trees and Economic Plants

2018 ◽  
Vol 1 (1) ◽  
Keyword(s):  
Crude Oil ◽  
Plant Species ◽  
Phragmites Australis ◽  
Growth Parameters ◽  
Economic Value ◽  
Growth Conditions ◽  
Polluted Water ◽  
Salty Water ◽  
Stable Growth ◽  
Petroleum Company

Oil-mining companies have to subject waste water to expensive treatment before it can be discharged on land or at sea to comply with environment regulations. This study aims at developing an economically valid and applied comprehensive solution that takes advantage of oil-contaminated brackish salty water disposed by the General Petroleum Company in Egypt, and maximizes its economic value and ensures its safe use in the environment. Three fields in Ras Sudr site of the company were inspected. Two main common plant species to Ras Sudr, Tamarix niloteca tree and Phragmites australis grass that is tolerant to salinity. These plants together with their associated bacteria of endophytes and rhizosphere that utilize crude oil as a carbon and energy source was considered a useful combination of bioremediation agents. Initially, soil characteristics were determined by analyzing soil samples taken at depths of 25cm and 50cm, and bacterial content of soil around the roots and within plant tissues was examined. Discharged water (@50 m3 day-1) was used in irrigating plant fields in amounts sufficient to plant needs only. Growth parameters of plants were assessed four times in an interval of two months. Preliminary results indicated that growth rates in plant length, number of branches and stem girth, and chlorophyll content of oil-polluted water irrigated plants of the two plant species were not significantly different (p≤0.05) of plants irrigated with fresh water. The number of bacteria in the soil increase9d significantly (p≥0.05) over time, and the color of residual oil in the soil was fading, indicating the its decomposition. Soil under Tamarix niloteca contained similar quantities of microorganisms in both coastal saline-alkali soil and inland arid region indicating that colonization of the plant provided stable growth conditions for microorganisms. These plants and endophytes and rhizosphere combination played the main rule in the in-situ bioremediation process, and were efficient in removing around 70 % of the initial traces of crude oil within two months. They also provide safe environment and romote plant growth. They were able to decompose hydrocarbons and residues of crude oil as they possess special physiological mechanisms (PGPR) turns polluted water to safe water for human and environment, and meanwhile achieving the objectives of this work. These results indicated that Tamarix niloteca and Phragmites australis are promising agents for treating oil-polluted salty wastewater in other fields of crude oil mining.

scholarly journals Coconut Husk and Processing Effects on Chemical and Physical Properties of Coconut Coir Dust

HortScience ◽  
1999 ◽  
Vol 34 (1) ◽  
pp. 88-90 ◽  
Author(s):  
Sreenivas Konduru ◽  
Michael R. Evans ◽  
Robert H. Stamps
Keyword(s):  
Physical Properties ◽  
Pore Space ◽  
Cocos Nucifera ◽  
Chemical Properties ◽  
Compression Pressure ◽  
Coconut Husk ◽  
Electrical Conductivities ◽  
Coir Dust ◽  
Processing Effects ◽  
Water Holding

Chemical properties of unprocessed coconut (Cocos nucifera L.) husks varied significantly among 11 sources tested. The pH and electrical conductivities were significantly different among husk sources and ranged from 5.9 to 6.9 and 1.2 to 2.8 mS·cm-1, respectively. The \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{NH}_{4}^{+}\) \end{document}, \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{NO}_{3}^{-}\) \end{document}, Ca, and Mg levels did not differ significantly among husk sources and ranged from 0.2 to 1.8, 0.2 to 0.9, 2.9 to 7.3, and nondetectable to 4.6 mg·kg-1, respectively. Levels of P, B, Cu, Fe, Ni, S, Zn, Mn, and Mo were all significantly different among husk sources and ranged from nondetectable levels to 33 ppm. The levels of Na, K, and Cl were significantly different among husk sources and ranged from 23 to 88, 126 to 236, and 304 to 704 ppm, respectively. Coir dust (CD) produced by screening of waste-grade coir through 3-, 6-, or 13-mm mesh screens had significantly different fiber content, bulk densities, total solids, total pore space, air-filled pore space, water-filled pore space, and water-holding capacities as compared with nonscreened waste-grade coir. However, screen size did not significantly affect the physical properties of CD. Neither compression pressure nor moisture level during compression of CD blocks significantly affected rehydration of compressed CD or physical properties of rehydrated CD.

Phomopsis cocoina. [Descriptions of Fungi and Bacteria].

1985 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Puerto Rico ◽  
Papua New Guinea ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
Solomon Islands ◽  
Cocos Nucifera ◽  
Personal Communication ◽  
Coconut Husk ◽  
Rain Splash

Abstract A description is provided for Phomopsis cocoina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cocos nucifera and Corypha umbraculifera. DISEASE: Leaf spot of coconut and recently found to be associated with stem bleeding of coconut palms (personal communication). Also perhaps involved in the rot of coconut husk. GEOGRAPHICAL DISTRIBUTION: Africa (Kenya, Mauritius, Seychelles); Asia (India, Malaysia (Sabah, Sarawak), Nepal, Sri Lanka); Australasia and Oceania (Guam Island, Papua New Guinea, Solomon Islands); West Indies (Jamaica, Puerto Rico, Trinidad). TRANSMISSION: No specific studies reported; presumably by conidia spread by rain splash.

The hazards of operational diving in heavily oil-polluted water

1991 ◽  
Vol 77 (3) ◽  
pp. 159-164
Author(s):  
K. A. Peterson ◽  
S. J. Portouw
Keyword(s):  
Thyroid Cancer ◽  
Skin Cancer ◽  
Crude Oil ◽  
Chronic Exposure ◽  
Animal Studies ◽  
Epidemiological Studies ◽  
Polluted Water ◽  
Toxic Dose ◽  
Increased Risk ◽  
Low Levels

AbstractThe war in the Gulf and the resultant massive oil spill has prompted an assessment of the health hazards to naval divers operating in oil-fouled environments. A review of current literature and discussions with experts in the field was undertaken to assess these hazards. With the assistance of Kuwait Petroleum, an assay of the content of average Kuwait crude was obtained. The risks of contact with crude oil and its vapours via the skin, inhalation and ingestion have been assessed. Contact dermatitis is the most likely sequel. A chemical pneumonitis from oil inhalation is possible but extremely unlikely. A health risk from ingestion of crude oil is equally unlikely since no toxic effect is thought to occur below a consumption of 5 ml/kg (350 ml for an average diver). Trace metals were found to be at a level of less than 1/10 of the minimal toxic dose for all but vanadium. No increased risk of skin cancer can be found in animal studies of crude oil. Epidemiological studies have recorded no increased risk of bladder or thyroid cancer in petroleum workers, but an increase in lung, nasal cavity, sinus and skin cancer has been shown following chronic exposure to low levels of petroleum vapour. No medical indication was found for modification of existing operational procedures, although, since the toxicity of some components of crude oil is unknown, the use of improved equipment to avoid contact should be studied.

Sign in / Sign up

Export Citation Format

Share Document