When solid waste containing harmful substances is piled up or disposed of and leached with water, the harmful substances will migrateConversion and environmental pollution. Leaching experiment is a field or laboratory simulation of this natural process. In the experiment, when there is leachingWhen the amount of harmful substances exceeds the threshold set by relevant regulations, the waste is considered to have leaching toxicity. Solid waste leaching

Toxicity identification is the basis for determining hazardous waste and an important technical link in the development of solid waste management and disposal technologies.

The TCLP (Toxicity Characteristic Leaching Procedure) method is implemented by the US government to protect resourcesThe RCRA for the management of hazardous waste and solid waste was established in 1984 and is the foundation of the US Environmental Protection Agency (EPA)The standard method for identifying hazardous or non hazardous waste based on toxicity, or the only toxicity characteristic recognized by RCRALeaching method. If the content of any TC component in TCLP extract is equal to or greater than the standard specified in 40CFR26 1.24If the concentration limit is set, the waste contains this TC component and is classified as hazardous waste.

The Toxicity Characteristic Leaching Method (TCLP) (US EPA Method 1311) is the most commonly used batch experiment, which uses leachingAdjust the acidity and alkalinity of solid waste using extraction agents for flipping extraction experiments. The required particle size for the experiment is less than 9.5mm. TCLPThe purpose of method development is to determine the transferability of 40 toxicity indicators (TC) in liquid, solid, and urban wasteThere are inorganic and organic compounds in the mixture, and the leaching experiment of volatile organic compounds uses a zero headspace extractor (ZHE) and sodium acetate buffer solution.

The hazardous waste filtration system provided by the company (CAT No: YT30142HW), ZHE hazardous waste filtration systemEnvironmentally friendly products such as CAT No: YT30090HW and rotary mixer (CAT No: YT310RAHW) are designed to comply with regulationsThe environmental toxicity testing requirements of the US EPA department have been designated as TCLP specific products by the US Environmental Protection Agency (USEPA). Meanwhile,The company also provides TCLP specific filter membranes and other consumables, providing professional and one-stop services for environmental workers.

The TCLP (Toxicity Characteristic Leaching Procedure) toxicity characteristic leaching method involves testing the liquid phase and solid phaseStandard method for analyzing the mobility of organic or inorganic pollutants in phase or multiphase waste, adopted by the United States Environmental Protection Agency (USEPA)The National Environmental Protection Administration of China has also incorporated this method into national standards. Translation of Environmental Protection Industry Standards of the People's Republic of ChinaFor leaching toxicity leaching procedures.

TCLP extraction equipment can be roughly divided into two categories for processing non-volatile and volatile substances.After the waste is extracted by TCLP program, the extracted liquid is reused by atomic absorption spectrometer (AA) and gas chromatograph (GC),Analyze the concentration of inorganic or organic pollutants in the leachate using liquid chromatography (HPLC) or ion chromatography (IC),The waste analyzed based on this judgment is either general waste or toxic waste.

The operational steps of TCLP include sample collection, storage, and processing, dissolution equipment operation procedures, reagent preparation, and related calculationsMethods can refer to Method 1311 issued by the United States Environmental Protection Agency (USEPA).