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Remedial ability of maize(Zea-Mays)on lead contamination under potted condition and non-potted field soil condition

Journal of Bioresources and Bioproducts 2020年第1期5卷 51-59页

作者： uche jenice chiwetalu Constantine Crowner Mbajiorgu Nneka Juliana Ogbuagu Agricultural and Bio-resources Engineering Department Faculty of EngineeringEnugu State University of Science and TechnologyEnuguNigeria Agricultural and Bioresource Engineering Department Faculty of EngineeringUniversity of Nigeria NsukkaEnugu StateNigeria

This study presents the remedial ability of maize on lead(Pb)contaminated *** samples were collected randomly from the site and subjected to physico-chemical tests before *** samples were contaminated artificially at six different concentration levels of lead nitrate(Pb(NO_(3))_(2)).Experimental design was 4-factorial combination(6×6×2×1).The study duration was 10 weeks,and during this period,Pb contents of the soil were analyzed in intervals of two *** physico-chemical properties of the soil showed that the soil was loamy with pH 6.82,electrical conductivity 1.62 dS/m and adequate macro nutrient *** av-erage percentage removal of Pb from the soil was 2.25%and 3.67%for potted and non-potted experiments,***,the average percentage of Pb in the roots was 1.10%and 1.68%for potted and non-potted experiments,*** result of this study indicated that extraction of Pb by the plant system increased with the increase of lead concentration in the soil as well as in the extent of vegetation attained by the *** also clearly showed that the non-potted experiments demonstrated greater influence on removal of Pb from the soil system than the potted experiments.

关键词： Soil Lead Contamination Remediation maize Potted Non-potted

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Evaluation of rice husk ash and Portland cement reinforced clay for use as road subgrade using the CBR test

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Journal of Bioresources and Bioproducts 2018年第2期3卷 65-70页

作者： Nneka Juliana Ogbuagu Emmanuel Amagu Echiegu uche jenice chiwetalu Department of Agricultural and Bioresource Engineering Enugu State University of Science and TechnologyEnuguNigeria Department of Agricultural and Bioresource Engineering University of Nigeria NsukkaNigeria.

The amount of rice husk waste generated in Nigeria is posing serious threat to the environment and the *** these wastes for productive purposes has been of interest to government and *** study evaluated rice hush ash(RHA)reinforced clay for use as road subgrade,using the California Bearing Ratio(CBR)as prescribed in ASTM *** clay was mixed with RHA/Portland cement in the ratios of 0%(control),2.5%,5%,7.5%and 10%.Results showed that the physical properties of the soil in its natural form did not meet the FMW&H guideline specification for subgrade road;thus there was a need to stabilize the *** the percentage of RHA increased,the strength of the soil increased,with the maximum strength observed at 5%RHA,beyond which there was decrease in the load bearing capacity of the *** CBR ratio of 9.35%was obtained at 5%RHA,5%Portland cement and 90%clay *** this result with the soil at natural state(CBR=1.55%),it shows that RHA is a good improvement agent for the *** research can be beneficial to highway road construction in areas with similar soil conditions.

关键词： Soil Stabilization Rice husk ash CBR Atterberg limit

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