Trace Metal Levels and Nutrient Characteristics of Crude Oil-Contaminated Soil Amended with Biochar–Humus Sediment Slurry

Nnanake-Abasi O Offiong,Helen S Etuk,Akwaowo I Inyangudoh,Godwin A Ebong,Edu J Inam,Francis Addison

doi:10.3390/pollutants1030010

Nnanake-Abasi O Offiong, Helen S Etuk + Show 4 more

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https://doi.org/10.3390/pollutants1030010

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Journal: Pollutants	Publication Date: Jun 23, 2021
Citations: 8	License type: CC BY 4.0

Affiliation: University of Uyo, Jilin University

Abstract

Biochar utilization for environmental remediation applications has become very popular. We investigated the trace metal levels and soil nutrient characteristics of a biochar–humus sediment slurry treatment of a simulated crude oil-contaminated soil in the present work. The results revealed that biochar prepared at moderate pyrolysis temperature (500 °C) could still retain a significantly higher nutrient content than those prepared at high temperatures (700 and 900 °C). Despite the suitability for soil treatment, one-pot treatment studies seem not to be very effective for monitoring trace metal sorption to biochar because trace metals do not biodegrade and remain in the system.

Highlights

Soil pollution by crude oil spills still constitutes a major environmental problem in many countries where oil exploration is the mainstay of the economy [1]
The results of pH, total organic carbon (TOC), total nitrogen, total phosphorus, potassium, and cation exchange capacity for the blank soil, sewage sludge, humus sediment, treated soils, and pyrolyzed sludge are presented in Tables 1 and 2
We monitored nutrient parameters (N, P, K) and trace metal levels in crude oilcontaminated soils amended with biochar–humus sediment slurry

Summary

Introduction

Soil pollution by crude oil spills still constitutes a major environmental problem in many countries where oil exploration is the mainstay of the economy [1]. The introduction of potentially toxic trace metals and organic contaminants into the environment is considered a threat to human and environmental health [2,3,4,5]. Due to their resistance to natural breakdown, heavy metals are among the most persistent contaminants in the environment [6]. The major concerns over exposure to trace metals include the deleterious effects they have on human and environmental health. These include possible cancer, cardiovascular diseases, and neurological disorders [7]. Trace metal pollution via oil spills has been an important topic of investigation [8,9,10]

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