Extraction of pentachlorophenol from soils using environmentally benign lactic acid solutions

“…The pH ≈ 8 of the overlying water means that PCP existed in an anionic form, which results in reduced hydrophobicity and limited sorption/desorption efficiency in humus or sediments (DiVincenzo and Sparks 2001; Site 2001). In laboratory studies concerning partitioning of PCP between solid and liquid phases, an 8-h period was sufficient to reach an equilibrium concentration (Site 2001; Chen et al 2004; Subramanian et al 2010; Liping et al 2015). The influence of simulated hydrostatic pressure on the physicochemical parameters of N I and N II sorbents and its overlying water was minor or not significant (Tables 6 and 7) compared to S , F , and I sorbents (Tables 4 and 5).…”

Section: Discussionmentioning

confidence: 99%

“…These experimental systems, designed to reflect in a smaller-scale processes occurring in the environment, are called microcosms (Hedman et al 2008; Olsen et al 2017). When microcosm consists of solid (I)–liquid (II) system, the matrix can be composed of (I) natural bottom sediments or only its selected fraction (sand, silt), soil, mineral (montmorillonite), and various types of biomasses; and (II) marine or freshwater, deionized water, or artificially created water on the basis of typical electrolytes (CaCl 2 , MgCl 2 ) with the addition of a buffer solution (Chen et al 2004; Subramanian et al 2010; León-Santiesteban et al 2014; Liping et al 2015). …”

Section: Introductionmentioning

confidence: 99%

Sorption of pentachlorophenol (PCP) in the marine bottom sediments—batch sorption experiment at varying pressure

Lewandowski

Cieślikiewicz

Kobusińska

et al. 2018

Environ Sci Pollut Res

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Study was undertaken to determine the effect of hydrostatic pressure on the sorption of pentachlorophenol (PCP). The experiment was conducted at atmospheric pressure (1000 hPa) and at increased pressure (6000 hPa) simulating conditions at the water depth of 50 m. The sorption of PCP was examined in an artificial environment (microcosm) consisting of the marine water and the bottom sediments from a Polish harbor and the southern Baltic Sea. The first part of the experiment comprised the determination of PCP sorption parameters in the microcosms and parameters of the sediments (organic matter content, conductivity) and of the overlying water (pH, ion concentration) at 1000 hPa. The second part of the experiment was conducted at 6000 hPa inside the hyperbaric chamber. The hyperbaric exposure affected parameters of the harbor sediments and the overlying water but had little influence on the concentration of PCP in the microcosms containing the southern Baltic Sea sediments. Considering the specific characteristics of the harbor sediments, it can be assumed that the impact of hydrostatic pressure on the sorption process of PCP at 50-m depth appears to be negligible.

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“…Generally, sorption of organic and trace metal pollutants are influenced by multiple factors that include pH [61], particle size, time of exposure of pollutants, and soil moisture [62] and specific surface area [63]. Previous studies have shown that the adsorptive competition happens when multiple pollutants are adsorbed onto biochar.…”

Section: Biochar Adsorption Of Trace Metalsmentioning

confidence: 99%

Review of Eco-Friendly Biochar Used in the Removal of Trace Metals on Aqueous Phases

Duwiejuah¹,

Cobbina²,

Bakobie³

2017

IJEBB

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Eco-friendly biochar produced from cost-effective and readily available agricultural waste will likely pose no threat on the aqueous phases, other environmental media, human health and emission of greenhouse gases to the atmosphere. Optimising biochar for an intended application could require careful selection of a biomass feedstock as well as production pyrolysis technique and conditions for the production of biochars with specific characteristics. Previous studies have explores the relationships that exist between biochar production conditions, characteristics, and possible end-uses of biochar. This review provides an overview of the production and utilisation of biochar as absorbents for adsorption of trace metals in contaminated aqueous environment. Biochar has great affinity to adsorb molecular ions that is making it possible to be used for various toxicological remediation strategies. It has proven effective and useful for mitigating aqueous metals, organic compounds, suspended solids, and organic hydrocarbons in a various kind of industrial applications such as urban and residential storm water runoff, landfill leachates, industrial runoff, resource extraction runoff, and industrial wastewater filtration. Specifically designed biochar could be very effective in the removal of trace metals from contaminated aqueous environment. The multiple factors that determine the adsorption of the trace metals in aqueous environment or phases needs to be carefully examined. Cost-effectiveness of biomass feedstock and eco-friendliness of techniques need to also be given much consideration by way of making comparison with existing contaminant mitigation technologies. Keywords: aqueous phases, biochar, cost-effective, biomass feedstock, removal, trace metalsCite This Article: A. B. Duwiejuah, S.

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Extraction of pentachlorophenol from soils using environmentally benign lactic acid solutions

Cited by 20 publications

References 40 publications

Simultaneous adsorption and dechlorination of pentachlorophenol from effluent by Ni–ZVI magnetic biochar composites synthesized from paper mill sludge

Simultaneous adsorption and dechlorination of pentachlorophenol from effluent by Ni–ZVI magnetic biochar composites synthesized from paper mill sludge

Sorption of pentachlorophenol (PCP) in the marine bottom sediments—batch sorption experiment at varying pressure

Review of Eco-Friendly Biochar Used in the Removal of Trace Metals on Aqueous Phases

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