Remediation of fipronil and/or ethiprole contaminated sediments by using biochar and detection method thereof

The invention relates to remediation of fipronil and/or ethiprole contaminated sediments by using biochar and a detection method thereof. The method for remediation of the fipronil and/or ethiprole contaminated sediments by the biochar comprises the steps of preparation of the biochar from michelia alba wood and remediation of the fipronil and/or ethiprole contaminated sediments. The method for determining the concentration of free-dissolved fipronil and/or ethiprole in the sediments after remediation comprises the steps of determination of the concentration of free-dissolved fipronil and/or ethiprole in the sediments after remediation by polyformaldehyde resin. Raw materials of the method are wide in sources and are easily available; the biochar prepared from the michelia alba wood has large specific surface area and strong adsorption ability; the operation flow is simple, the condition requirements are low, and the remediation method can be used for remote treatment and on-site treatment of contaminated sediments; environment risk is low, no secondary pollution exists, and the practical application value is high; and with use of the detection method, the determination result is accurate, and the operations are simple and efficient.