Effects of organic amendment on some soil physicochemical characteristics and vegetative properties of Zea mays in wetland soils of the Niger Delta impacted with crude oil

Abstract

Purpose This study sought to investigate the effects of organic amendments on the degradation of hydrocarbons and vegetative properties of Zea mays grown in crude oil-contaminated wetland soils of the Niger Delta, Nigeria. Methods Two soil types were investigated, namely, fadama soil (oxisol) and swamp forest soil (utisol). For each soil type, 48 treatment cells and 1 control containing 1 kg of soil each were spiked with crude oil at concentrations ranging from 50 to 200 g kg −1 , representing 5-20% (m/m) contamination levels, respectively. Then, 5 days after the contamination, the soils were amended with cow dung (CD), poultry waste (PW), and palm oil waste (POW). The ratios of soil to organic amendments used were 1:1 and 2:1. The soils were tilled and irrigated regularly, and monitored for a total period of 112 days. The same conditions were used to investigate the vegetative properties of Z. mays in these oil-contaminated soils with organic amendments.Results The total organic carbon (TOC) and pH increased significantly within the first 2 weeks after crude oil contamination; thereafter, the pH of the soil decreased significantly over incubation time, while there was steady increase in TOC with incubation time. The percentage nitrogen and total petroleum hydrocarbons (TPH) decreased significantly. The utisol soil showed better plant performance, despite the lower hydrocarbon degradation rate. Conclusion The organic amendments showed a TPH degradation trend that followed the order: PW > CD > POW. They also improved the seed emergence of Zea mays.

Study on the Corrosive Nature of Soil Physico-Chemical Characteristics Toward Pipelines in Oil Producing Communities in Niger Delta of Nigeria

“…The result revealed that the soil samples can influence corrosion. The study revealed temperature that is consistent with temperature of the region and a usual characteristic of Niger Delta region soil [25]. This is also identical to the report of [26].…”

“…Highly acidic soils clearly indicate a high corrosion risk to buried facilities. pH combines with the aerobic situations in the soil environment can influence the character of microbial activity that have a huge effect on corrosion rates as revealed by [2,1,25] Therefore, based on the pH values of the soil samples, the soil from these communities may be mildly corrosive towards buried pipeline.…”

“…That is, there is absence of oxygen which is required for iron to rust. Anaerobic soil samples are devoid of oxygen which is necessary for production of passive oxide layers on the surface of the metallic materials [2,1,25]. Thus, this low redox potential in the soil samples in this region may result into anaerobic condition and hence promote proliferation of sulphate reducing bacteria which have contributed immersely to the corrosion problem.…”

Bacterial community and chemical profiles of oil-polluted sites in selected cities of Uganda: potential for developing a bacterial-based product for remediation of oil-polluted sites

“…Thus, the continuous pollution of the garage and industrial sites with petroleum fuels could have led to significant increase in the content of both organic matter and these nutrients, as reported elsewhere [ 58 ]. These results are partly in disagreement with the findings of Egobueze,Ayotamuno [ 59 ], who observed that petroleum fuel contamination increased the amount of organic matter but decreased the available phosphorous and nitrogen [ 59 ]. Though some researchers have reported that the high nutrient content of petroleum fuels supports the growth of oil degrading bacteria [ 60 , 61 ], there is evidence that the alterations in soil properties resulting from oil pollution impair plant growth and other ecosystem services [ 62 ].…”

Bioremediation of soils contaminated by hydrocarbons using animal manure, a systematic review during the years 2017-2022.

“…Siendo Nigeria el país más representativo con una cantidad de 9 artículos representan el 37.5% del total de artículos seleccionados. Esto se debe a que este país es una zona rica en petróleo altamente poblada y sus ecosistemas han sido impactados gravemente por los efectos del petróleo e hidrocarburos [15], lo que conlleva a la degradación de tierra agrícolas, vegetación y acuicultura [24]. Por otro lado, Brasil, Sudáfrica, Polonia, Egipto, Arabia Saudita y Tailandia representan cada uno el 4.16% ya que solo cuentan con un artículo seleccionado.…”