Moisture Absorption, Shrinkage Ratio and Compressive Strength of Cement Stabilized Laterite Bricks Mixed with Spent Engine Oil

Removal of Zn, Pb, Cu and Fe ions from unspent and spent engine oil was studied using Termite soil. Process parameters such as contact time and adsorbent dosage were varied. Values from contact time were used for predicting kinetics equation of their uptake. At optimum time of 40 minutes, percentage adsorption was of the order Fe>Zn>Cu>Pb for both spent and unspent engine oil. Kinetics equation such as Elovich, Intra-particle, Pseudo-first order and Pseudo-second order were tested. Results obtained shows that their sequestering pattern fit into the pseudo-second order kinetics. Initial reaction rates, h (mg/g.min) and α (mg. g-1min-1) for all metal ions obtained from Pseudo-second order and Elovich kinetic models followed the trends Zn>Fe>Cu>Pb and Zn>Fe>Pb>Cu respectively in spent engine oil while for unspent engine oil, the trend was Fe>Zn>Cu>Pb for h (mg/g.min) and Zn>Fe>Pb>Cu for α (mg. g-1min-1). Electrostatic attraction existing on the surface of the adsorbent assisted in the high initial reaction of Zn and Fe ions, implying good affinity of the ions for the adsorbent. Desorption constant ᵦ (g/mg) was of the trend Cu>Pb>Fe>Zn and Cu>Pb>Zn>Fe for spent and unspent engine oils respectively. Intra-particle diffusion constant kid (mgg-1min-1/2) followed a similar pattern, revealing strong binding between Zn and termite soil than any of the metal ion. This pilot research has been able to suggest a kinetic process for uptake of the studied ions from spent and unspent engine oil.

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Phytoremediation of Spent Oil and Palm Kernel Sludge Contaminated Soil Using Sunflower (Helianthus annuus) L

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v25i5.30 ◽

2021 ◽

Vol 25 (5) ◽

pp. 877-885

Author(s):

A.J. Odebode ◽

K.L. Njoku ◽

A.A. Adesuyi ◽

M.O. Akinola

Keyword(s):

Helianthus Annuus ◽

Plant Height ◽

Palm Oil ◽

Contaminated Soil ◽

Palm Kernel ◽

Engine Oil ◽

Palm Kernel Oil ◽

Kernel Oil ◽

Spent Engine Oil ◽

And Control

This study was carried out to investigate the phytotoxicity of spent engine oil and palm kernel sludge on seed germination, seedling early growth and survival of sunflower (Helianthus annuus L) and its phytoremediating potential. 8.0 kg topsoil mixed with 2, 4, 6, 8 and 10% (w/v) of spent engine oil and palm kernel sludge, while the control was not mixed with spent oil and sludge (0%). The seeds were sown on these soils and monitored daily. Parameters taken were; plant height, leaf number and stem girth. The result showed that spent engine oil treated plants adversely affected growth compared to palm kernel sludge plants and control which performed better. For plant height, the mean stem girth for control at 2nd week was 0.40±0.05 mm, spent engine oil was 5.96±0.97 palm kernel oil effluent was 14.73±1.16 and at 12th week, control was 1.30±0.05 while for SEO the plant had withered and 124.6±9.02 for POE. Number of leaves at the 12th week was 26.00±2.08 in the control, 8.66±0.66, for spent engine oil at 4%, while for palm oil effluent it was 27.66±0.66, at 4%, concentration respectively. Stem girth at 2 weeks for spent engine oil was 0.19±0.05 at 2%, 0.43±0.03 for palm kernel oil effluent and at the 12th week of planting at 10% concentration was 1.63±0.08 for palm kernel oil effluent, and all plants had withered off for spent engine oil at same concentration at the 12th week. Also, spent engine oil at all concentrations delayed the germination of Helianthus annuus by 2days compared to control. Comparison analysis test showed that growth in untreated plants were significantly higher (p>0.05) than spent oil and palm kernel sludge treated plants. Similar result was observed for leaf number and stem girth which had higher mean value in palm kernel sludge and control compared to spent oil. Sunflower grown in 8% and 10% palm kernel sludge contaminated soil also flowered eight days earlier than control plants, while spent oil treated plant did not. The result shows that sunflower cannot tolerate high (4%, 6%, 8% and 10%) concentrations of spent engine oil in soil compared to palm oil effluent. Therefore, spent engine oil should be properly disposed because of its adverse effect on the growth and yield of sunflower.

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Feasibility study of the use of Groundnut Shells as Fine Aggregates in Light weight Concrete Construction

International Journal of Advanced Research in Engineering ◽

10.24178/ijare.2015.1.1.13 ◽

2015 ◽

Vol 1 (1) ◽

pp. 13 ◽

Cited By ~ 3

Author(s):

Henry Tata Kimeng ◽

Olurotimi Olusegun Ekundayo ◽

Mustapha Sani ◽

Kigha Frederick

Keyword(s):

Compressive Strength ◽

Moisture Absorption ◽

Waste Materials ◽

Fine Aggregate ◽

Waste Products ◽

Scarce Resources ◽

Concrete Panels ◽

Fine Aggregates ◽

Partition Walls ◽

Groundnut Shell

Issues bothering on sustainability in our society today have generated a lot of curious interest among researchers. The need to optimize the use of scarce resources, reduce cost of construction, and reduce environmental pollution has necessitated the research into many waste materials that pose a lot of threat to the environment. One of these waste materials is groundnut shell which is abundant in Northern Nigeria and which is normally left to rot and pose an environmental nuisance. This research therefore sought to use groundnut shell as a partial or full replacement as fine aggregate in light concrete panels with the ultimate aim of reducing the amount of these waste products in our environment and also indirectly increasing groundnut production if the research is successful. This is because farmers will not only sell the groundnuts but also will sell the waste products. 63 concrete samples were casted using groundnut shell replacements of 0%, 10%, 20%, 30%, 50%, 70%, 100% and tested for 7days, 14days and 28 days for compressive strength tests. The density of the various samples measured and swelling tests were also carried out. From the results of the laboratory tests the density of the cubes ranged from 830kg/m3 for cubes with only groundnut shells to 2160kg/m3 for cubes with only sand as fine aggregates. The average compressive strength range for 0% ground shell to 100% ground shell was 5.83N/mm2 to 0.9N/mm2 at 7 days, 8.07 to 0.5 N/mm2 at 14 days and 10 to 0.6 N/mm2 at 28 days while moisture absorption increased from 0.47 to 2.04%. The strength results indicate that groundnut shell panels cannot be used for structural purposes but will be suitable for non-load bearing partition walls. Replacements of 30 to 70% had suitable strength and can be used for this purpose. It is recommended that further research to be carried out to determine its acoustic and thermal properties.

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