Electrokinetic remediation (EKR) is an in-situ remediation applying voltage on both sides of the contaminated aquifer. Pollutants migrate to one end of the electrode under the electric field to be cleaned by electrodeposition, adsorption, precipitation, or co-precipitation (McBratney et al., 2014) (Fig. 2).EKR has advantages of operational ease, …
Novel and sustainable ex-situ remediation technologies for contaminated sediment have been developed and adopted in recent years. In this review paper, the …
Given the severity and universality of heavy metal contaminated sites, some remediation technologies have been developed, including soil thermal desorption, soil washing, phytoremediation, and so on (Ali et al., 2013; Gong et al., 2018; Cho et al., 2021; He et al., 2015; Ma et al., 2014; Shah and Daverey, 2020; Zhao et al., 2019a).As shown …
Pollution and the global health impacts from toxic environmental pollutants are presently of great concern. At present, more than 100 million people are at risk from exposure to a plethora of toxic organic and inorganic pollutants. This review is an exploration of the ex-situ technologies for cleani …
In-situ and ex-situ bioremediation methods are analyzed, along with intrinsic and engineered techniques, and phytoremediation strategies for heavy metal removal. The review underscores the growing importance of bioremediation in addressing industrial effluents, contaminated soils, and groundwater, with future advancements expected to …
Screening remediation technologies through the lens of green, low-carbon, and sustainable development is crucial for contaminated land management. To better understand the applicability of remediation technologies, this paper explored their application in China based on a survey of 643 cases. By employing coupled analysis …
Remediation technologies involve any operation that alters the characteristics of pollutants to reduce their toxicity, volume, or mobility, through the application of physicochemical and/or biological processes (Supp. Table 1) [24]. These technologies can be grouped according to their form of application in ex-situ and in …
Classification of arsenic-contaminated soil remediation technologies into in situ and ex situ. • Comprehensive evaluation of various remediation techniques. • …
Ex situ thermal desorption has become one of the most effective remediation technologies for organic contaminated soil [6,7,8,9]. Ex situ soil remediation usually is the second choice after in situ technology, which are more sustainable and less costly; thus, the effort to analyze the impact of the ex situ remediation processes is …
The matrix allows you to screen through 64 in situ and ex situ technologies for either soil or groundwater remediation. Variables used in screening include …
The in situ technologies presented involve apply ing chemical, biological, or physical processes to the subsurface to degrade, remove, or immobilize contaminants without removing the bulk soil. Compared to excavation and ex situ treatment, the use of these technologies offers several benefits, such as addressing deep contamination and gener
Bioremediation can either be carried out ex situ or in situ, depending on several factors, which include but not limited to cost, site characteristics, type and concentration of pollutants. Generally, ex situ techniques apparently are more expensive compared to in situ techniques as a result of additional cost attributable to excavation ...
Bioremediation is an engineered technology that modifies environmental conditions (physical, chemical, biochemical, or microbiological) to encourage …
PDF | On Jan 17, 2013, Helena I Gomes and others published Overview of in Situ and ex Situ Remediation Technologies for PCB-contaminated Soils and Sediments and Obstacles for Full-scale ...
Soil Remediation Technologies Remediation technologies are many and varied but can generally be categorized into ex-situ and in-situ methods. Ex-situ methods involve excavation of affected soils and …
In situ bioremediation of groundwater has become one of the most widely used technologies for contaminated site treatment because of its relatively low cost, adaptability to site specific conditions, and efficacy when properly implemented. Introduction to In Situ Bioremediation of Groundwater (pdf) (2.23 , 2013, 542-R …
Ex situ technologies are advantageous when a safe and effective intervention is required (i.e., in the presence of severe contamination of highly hazardous compounds).
In situ and ex situ soil remediation technologies can be classified as physical, biological, chemical, and combined approaches. Whereas in situ soil remediation technologies are aimed at the decontamination of soil at its original site, ex situ technologies are performed through the excavation of the soil and decontaminating it …
effectiveness under conditions relevant to the 200-UP-1 OU. Within this report, the technologies are organized into three broad categories: in situ sequestration or removal of iodine from groundwater, in situ mobilization of iodine to enhance extraction efficiency, and ex situ removal of iodine from groundwater to support P&T operations.
12.2.1.1 Granular Activated Carbon (GAC) Treatment Description: GAC is an effective sorbent media for organics that has historically been used to reduce contaminants in a variety of environmental media.The information contained in this section describes ex situ GAC treatment in which water is extracted and transferred from the source of …
In-situ remediation technologies have been widely applied for sediment treatment, e.g., monitored natural recovery, enhanced monitored natural recovery, in-situ capping and in-situ treatments (Jersak et al., 2016).It should be noted that the intricacy of the water-sediment system would impede the effectiveness of in-situ remediation in …
Quantitative evaluation of different contaminated soil remediation technologies in multiple dimensions is beneficial for the optimization and comparative selection of technology. Ex situ thermal …
The matrix allows you to screen 49 in situ and ex situ technologies for either soil or groundwater remediation. Variables used in screening include contaminants, development status, overall cost, and cleanup time. In-depth information on each technology is also available, including direct links to the database of cost and performance reports ...
This commentary considers four PFAS remediation technologies (granular activated carbon, ion-exchange resin, fractionation, and in situ remediation with colloidal activated carbon) and identifies places in the life cycle that have the potential for environmental releases from the handling, transport, disposal, regeneration, and/or ...
The ex-situ thermal desorption technology has been widely used from 1990 to 1999. During the period from 1991 to 2003, there were five years (1991, 1996, 1998, 2002, and 2003) where its number of cases exceeded that of in-situ thermal desorption. After 2006, ex-situ thermal desorption has become less and less popular.
technologies. The most promising emerging technologies are also examined. Treatment of metals-contaminated groundwater has typically involved flushing and above-ground treatment, while treatment of contaminated solids most often has been performed by excavation followed by ex situ treatment or disposal. The most common ex situ treatment
In situ thermal remediation (ISTR) is perhaps the only in situ technology that is capable of complete removal of non-aqueous phase liquids (NAPLs) from contaminant source zones within time frames of less than a year. Other in situ technologies that may be capable of similar treatment times (chemical oxidation …
TRS Group, a employee-owned company with joint ventures and partnerships in Brazil, China and Europe, is a global provider of thermal remediation and PFAS removal technologies for the in situ treatment of soils, groundwater and bedrock, the ex situ treatment of soil piles and dredged sediment and AFFF fire suppression …
Many different in situ or ex situ remediation techniques have been developed throughout the years to reduce the risk imposed by the contamination of soil and water. However, the number of cost-effective options is still quite limited. ... Overview of in situ and ex situ remediation technologies for PCB-contaminated soils and sediments …
The use of in-situ remediation technologies has steadily increased over the past 20 years. These technologies are versatile in that they can be injected into the subsurface or mixed with soil as a liquid, powder, or gas. Some patented products include time-release compounds for more targeted remediation.
The list above highlights those cost dependencies specific to air stripping and does not consider the dependencies that are general to most in situ remediation technologies. Click here for a general discussion on costing which includes definitions and repetitive costs for remediation technologies. A project-specific cost estimate can be ...
The results show that the tool is capable of life cycle cost analysis for the ex situ remediation technology, including biological, thermal, and chemical treatments.
Soil washing is an ex-situ remediation technique that removes hazardous contaminants from soil by washing the soil with a liquid (often with a chemical additive), scrubbing the soil, and then separating the clean soils from contaminated soil and washwater (US EPA 1993, 1996). The concept of soil washing is based on the theory …
The remediation technologies screening matrix is a user-friendly tool for screening potentially applicable technologies for a remediation project. The matrix allows you to screen 49 in situ and ex situ technologies for either soil or groundwater remediation.
In ex-situ technologies, the excavation or treatment of the soil or sediment takes place outside the contaminated site . In-situ remediation processes generally provide a greater cost benefit than ex-situ remediation processes, while removal or extraction processes are more useful in relation to immobilization or containment …
