A combined remediation method of petroleum-contaminated soil includes: impurity removal pretreatment, photocatalytic pre-oxidation, stepwise thermal desorption of petroleum from soil, and high-temperature oxidation; with iron-titanium composite metal oxide (ITCMO) as a catalyst, conducting oxidation pretreatment under light conditions so that some cross-linked structures in macromolecular petroleum contaminants are broken and degraded; and conducting stepwise pyrolysis to achieve a removal rate of more than 98.00%. The new method adopts a combined remediation technology of photocatalytic pre-oxidation-stepwise pyrolysis, which realizes a relatively-high removal rate of petroleum hydrocarbons and the efficient and harmless remediation of high-concentration petroleum-contaminated soil, and remedied soil can be reused.

A heating device for heating underground soil including a conductor housed in a conductive casing, where when at least one driving current is supplied to the conductor, the conductor generates at least one magnetic field that induces at least one induced current in the casing. The driving currents are of a frequency sufficient to cause the induced currents to generate resistance in the casing, thereby increasing the temperature of the casing. A plurality of the heating devices may be arranged in an array to facilitate the heating of a zone of soil.

A system and method for performing pyrolysis comprises a reactor through which organic material is conveyed from an upstream end toward a downstream end and within which said pyrolysis will occur; a combustion chamber fluidically connected to the downstream end of the reactor; an output pipe fluidically connected to the downstream end of the reactor; a capsule surrounding a first part of the reactor and into an internal portion of which heated thermal fluids are disposed for heating the first part of said reactor; and a plurality of electrical resistors disposed around a second part of the reactor for heating the second part of the reactor; whereby, as a result of the pyrolysis occurring within the reactor, the syngas is conducted toward the combustion chamber while the carbonized material is conducted outwardly from the reactor through the output pipe.

A method for remediating contaminated soil and groundwater includes selecting a treatment material and creating a smolderable mixture of a contaminant, the treatment material, and soil.

An in-situ thermal desorption system, an in-situ thermal desorption-oxidation remediation system and a remediation method are provided, wherein the in-situ thermal desorption system comprises a heating device and an extraction device, wherein the heating device is used for transporting heated air to the contaminated soil to desorb the organic pollutants, and wherein the extraction device is used for sucking the desorbed organic pollutants. The in-situ thermal desorption-oxidation remediation system adds a thermal catalytic oxidation device based on the in-situ thermal desorption system, wherein the organic pollutants extracted by the extraction device are catalytically degraded in the thermal catalytic oxidation device, and a device for recycling and reprocessing an exhaust gas is further added. The present disclosure also provides an in-situ thermal desorption-oxidation remediation method. The heating method of the present disclosure is novel, which reduces the cost of thermal desorption, strengthens the heating area, improves the heating efficiency, further enhances the thermal catalytic oxidation efficiency, and achieves the reuse and recycle of the exhaust gas. Thus, no secondary exhaust gas is produced.

A method for remediating contaminated soil and groundwater includes selecting a treatment material and creating a smolderable mixture of a contaminant, the treatment material, and soil.

A rock sample includes multiple rock samples that are each obtained from the borehole. The rock samples have been exposed to contamination during a drilling operation to drill the borehole. The rock sample is split into a first sample portion and a second sample portion. The first sample portion is decontaminated with a solvent. The second sample portion is decontaminated by thermovaporization for an initial duration of time at an initial thermovaporization temperature below that of a cracking temperature of an organic matter carried within the rock sample. A difference between a first pyrolysis Tmax value of the first sample portion decontaminated by the solvent and a second pyrolysis Tmax value of the second sample portion decontaminated by the thermovaporization is determined to satisfy a decontamination level threshold. The remainder of rock samples are decontaminated by the thermovaporization in response to determining that the difference satisfies the decontamination level threshold.

Implementations of a non-polluting biomass processor, and manufactured processor components are disclosed which at least partly address the local technical problems of a municipality, business, and/or organization, to generate non-polluting emissions, while generating at least one, often two or more, product outputs from biomass feedstocks input into the biomass processor. Examples of the operations of the biomass processor and various combinations of its manufactured processor components are disclosed. The product outputs may include carbon char and/or activated carbon, both of which may be used to increase water retention in climates with hot, dry summers and/or used to remediate water pollution in water reservoirs.

An in-situ vapor injection thermal desorption device includes a sectional combined input head, several intermediate connectors and a bottom protector connected in series from top to bottom. The in-situ vapor injection thermal desorption device further includes several water-vapor coupling injection activation chips, selectively disposed below any of the intermediate connectors; the sectional combined input head is provided with a high-pressure-gas inlet, several pairs of heat-transfer-oil inlets and heat-transfer-oil outlets, and several pairs of hot-water inlets and hot-water outlets; the water-vapor coupling injection activation chip is provided with several gas-liquid spraying holes. The disclosure is an assembling structure; the number of the water-vapor coupling injection activation chips can be increased or reduced according to remediation depth on an actual site; it can be repeatedly used, uniformly sprayed, and enables the vapor for treating the organic soil to be generated in situ and remediating organic pollution sites in a low-carbon, energy-saving way.

The invention relates to a pyrolysis plant and a process for recovering (recycling) carbon fibers from carbon fiber-containing plastics, in particular from carbon fiber-reinforced plastics (CFPs or CFP materials), preferably from carbon fiber-containing and/or carbon fiber-reinforced composites (composite materials).