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您的检索式：作者名="Echiegu Emmanuel"
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| 1 | Influence of automobile industrial wastewater on soil quality显示文摘Reuse of industrial wastewater(effluent)for irrigation purpose is a common practice.However,lack of adequate treatment of the effluent can cause soil deterioration,vegetation destruction and contamination of the aquatic environment.These adverse effects necessitated the study of wastewater irrigation in Emene Industrial Layout,Enugu State,Nigeria.Wastewater and soil samples were collected,analyzed and subjected to Analysis of Variance(ANOVA)for Completely Randomized Design(CRD)at 5% probability level using GENSTAT software.The results obtained from the study were compared with FAO soil and water standards.The wastewater analysis suggested that contamination at the untreated stage was very high and results at the treatment level were within the FAO reuse range.The study also found wide variation in chemical status of industrial wastewater treated soil.Almost all the values for the wastewater treated soil were not within the FAO irrigated soil chemical properties standards.This suggests high re-contamination along the open channel(from non-point sources)before reuse.This calls for proper monitoring and treatment of the industrial effluent prior to irrigation application. | Ugwu Samson Nnaemeka Anyadike Chinenye Chukwuemeka Echiegu Emmanuel Nwoke Oji Achuka Ugwuishiwu Boniface | 2014 | International Journal of Agricultural and Biological Engineering2014，7，6： | 1 |
| 2 | Evaluation of rice husk ash and Portland cement reinforced clay for use as road subgrade using the CBR test显示文摘The amount of rice husk waste generated in Nigeria is posing serious threat to the environment and the ecosystem.Utilizing these wastes for productive purposes has been of interest to government and researchers.This study evaluated rice hush ash(RHA)reinforced clay for use as road subgrade,using the California Bearing Ratio(CBR)as prescribed in ASTM D1883.The 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 soil.As 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 soil.Optimal CBR ratio of 9.35%was obtained at 5%RHA,5%Portland cement and 90%clay soil.Comparing this result with the soil at natural state(CBR=1.55%),it shows that RHA is a good improvement agent for the soil.This research can be beneficial to highway road construction in areas with similar soil conditions. | Nneka Juliana Ogbuagu Emmanuel Amagu Echiegu Uche Jenice Chiwetalu | 2018 | Journal of Bioresources and Bioproducts2018，3，2： | 0 |
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