Evaluation of enhanced soil washing process with tea saponin in a peanut oil-water solvent system for the extraction of PBDEs/PCBs/PAHs and heavy metals from an electronic waste site followed by vetiver grass phytoremediation

2014 ◽  
Vol 90 (11) ◽  
pp. 2027-2035 ◽  
Author(s):  
Mao Ye ◽  
Mingming Sun ◽  
Jinzhong Wan ◽  
Guodong Fang ◽  
Huixin Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Electronic Waste ◽  
Soil Washing ◽  
Solvent System ◽  
Vetiver Grass ◽  
Waste Site ◽  
Tea Saponin ◽  
Water Solvent ◽  
Washing Process ◽  
Oil Water

Feasibility of Tea Saponin-Enhanced Soil Washing in a Soybean Oil-Water Solvent System to Extract PAHs/Cd/Ni Efficiently from a Coking Plant Site

Pedosphere ◽  
2017 ◽  
Vol 27 (3) ◽  
pp. 452-464 ◽  
Author(s):  
Mao YE ◽  
Mingming SUN ◽  
Shanni XIE ◽  
Kuan LIU ◽  
Yanfang FENG ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Soil Washing ◽  
Solvent System ◽  
Tea Saponin ◽  
Water Solvent ◽  
Plant Site ◽  
Oil Water ◽  
Coking Plant

Evaluation of soil washing process with carboxymethyl-β-cyclodextrin and carboxymethyl chitosan for recovery of PAHs/heavy metals/fluorine from metallurgic plant site

2014 ◽  
Vol 26 (8) ◽  
pp. 1661-1672 ◽  
Author(s):  
Mao Ye ◽  
Mingming Sun ◽  
Fredrick Orori Kengara ◽  
Jingting Wang ◽  
Ni Ni ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Soil Washing ◽  
Carboxymethyl Chitosan ◽  
Washing Process ◽  
Plant Site

scholarly journals Efficient simultaneous removal of heavy metals and polychlorobiphenyls from a polluted industrial site by washing the soil with natural humic surfactants

2021 ◽  
Author(s):  
Alessandro Piccolo ◽  
Antonio De Martino ◽  
Francesco Scognamiglio ◽  
Roberto Ricci ◽  
Riccardo Spaccini
Keyword(s):  
Heavy Metals ◽  
Soil Washing ◽  
Northern Italy ◽  
Soil Reclamation ◽  
Soil Biodiversity ◽  
Pcb Congeners ◽  
Industrial Soil ◽  
Washing Process ◽  
Removal Of Heavy Metals ◽  
Synthetic Surfactants

AbstractWe evaluated the effectiveness of natural organic surfactants such as humic acids (HA) from lignite to simultaneously wash heavy metals (HM) and polychlorobiphenyls (PCB) from a heavily contaminated industrial soil of northern Italy. Supramolecular HA promote in solution a micelle-like structure, where recalcitrant apolar organic xenobiotics are repartitioned from surfaces of soil particles during soil washing process. Concomitantly, the HA acidic functional groups enable a simultaneous complexation of HM. A single soil washing with HA removed 68 and 75% of PCB congeners for 1:1 and 10:1 solution/soil ratios, respectively. The same HA washing simultaneously and efficiently removed a cumulative average of 47% of total HM, with a maximum of 57 and 67% for Hg and Cu, respectively. We showed that washing a highly polluted soil with HA solution not only is an effective and rapid soil remediation technique but also simultaneously removes both HM and persistent organic pollutants (POP). Soil washing by humic biosurfactants is also a sustainable and eco-friendly technology, since, contrary to synthetic surfactants and solvents used in conventional washing techniques, it preserves soil biodiversity, promotes natural attenuation of unextracted POP, and accelerates further soil reclamation techniques such as bio- or phytoremediation.

scholarly journals Remediation of Toxic Heavy Metal Contaminated Soil by Combining a Washing Ejector Based on Hydrodynamic Cavitation and Soil Washing Process

2022 ◽  
Vol 19 (2) ◽  
pp. 786
Author(s):  
Hyunsoo Kim ◽  
Kanghee Cho ◽  
Oyunbileg Purev ◽  
Nagchoul Choi ◽  
Jaewon Lee
Keyword(s):  
Heavy Metals ◽  
Phosphoric Acid ◽  
Contaminated Soil ◽  
Fine Particles ◽  
Soil Washing ◽  
Hydrodynamic Cavitation ◽  
Metal Phase ◽  
Toxic Heavy Metals ◽  
Physical Separation ◽  
Washing Process

Based on the features of hydrodynamic cavitation, in this study, we developed a washing ejector that utilizes a high-pressure water jet. The cavitating flow was utilized to remove fine particles from contaminated soil. The volume of the contaminants and total metal concentration could be correlated to the fine-particle distribution in the contaminated soil. These particles can combine with a variety of pollutants. In this study, physical separation and soil washing as a two-step soil remediation strategy were performed to remediate contaminated soils from the smelter. A washing ejector was employed for physical separation, whereas phosphoric acid was used as the washing agent. The particles containing toxic heavy metals were composed of metal phase encapsulated in phyllosilicates, and metal phase weakly bound to phyllosilicate surfaces. The washing ejector involves the removal of fine particles bound to coarse particles and the dispersion of soil aggregates. From these results we determined that physical separation using a washing ejector was effective for the treatment of contaminated soil. Phosphoric acid (H3PO4) was effective in extracting arsenic from contaminated soil in which arsenic was associated with amorphous iron oxides. Thus, the obtained results can provide useful information and technical support for field soil washing for the remediation of soil contaminated by toxic heavy metals through emissions from the mining and ore processing industries.

Remediation of Heavy Metals Contaminated Soil and Soil Washing

2015 ◽  
Vol 5 (3) ◽  
pp. 1-6 ◽  
Author(s):  
Zainab Siddiqui ◽  
◽  
S.M Ali Jawaid ◽  
Sandeep Vishen ◽  
Shreya Verma ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Contaminated Soil ◽  
Soil Washing

Anaerobic treatment of soil wash fluids from a wood preserving site

1998 ◽  
Vol 38 (7) ◽  
pp. 63-72 ◽  
Author(s):  
K. M. Miller ◽  
M. T. Suidan ◽  
G. A. Sorial ◽  
A. P. Khodadoust ◽  
C. M. Acheson ◽  
...  
Keyword(s):  
Soil Washing ◽  
Anaerobic Treatment ◽  
Integrated System ◽  
Waste Stream ◽  
Adsorptive Capacity ◽  
Anaerobic Conditions ◽  
Washing Process ◽  
Polycyclic Aromatic ◽  
Treatment Technologies ◽  
Solvent Washing

An integrated system has been developed to remediate soils contaminated with pentachlorophenol (PCP) and polycyclic aromatic hydrocarbons (PAHs). This system involves the coupling of two treatment technologies, soil solvent washing and anaerobic biotreatment of the extract. Specifically, this study evaluated the effectiveness of the granular activated carbon (GAC) fluidized-bed reactor to treat a synthetic waste stream of PCP and four PAHs (naphthalene, acenaphthene, pyrene, and benzo(b)fluoranthene) under anaerobic conditions. This waste stream was intended to simulate the wash fluids from a soil washing process treating soils from a wood preserving site. The reactor achieved a removal efficiency of greater than 99.8% for PCP with conversion to its dechlorination intermediates ranging from 47% to 77%. Effluent, carbon extraction, and isotherm data also indicate that naphthalene and acenaphthene were removed from the liquid phase with efficiencies of 86% and 93%, respectively. Effluent levels of pyrene and benzo(b)fluoranthene were extremely low due to the adsorptive capacity of GAC for these compounds. Experimental evidence does not suggest that these compounds were chemically transformed within the reactor.

Conversion of glucose into furans in the presence of AlCl3 in an ethanol–water solvent system

2012 ◽  
Vol 116 ◽  
pp. 190-194 ◽  
Author(s):  
Yu Yang ◽  
Changwei Hu ◽  
Mahdi M. Abu-Omar
Keyword(s):  
Solvent System ◽  
Water Solvent

Effect of Cellulose Coating on Properties of Cotton Fabric

2016 ◽  
Vol 860 ◽  
pp. 81-84
Author(s):  
Bandu Madhukar Kale ◽  
Jakub Wiener ◽  
Jiri Militky ◽  
Hafiz Shahzad Maqsood
Keyword(s):  
Tensile Strength ◽  
Cotton Fabric ◽  
Solvent System ◽  
Dissolving Pulp ◽  
Cotton Fibers ◽  
Cellulose Solution ◽  
Dyeing Properties ◽  
Sem Micrographs ◽  
Coated Substrate ◽  
Water Solvent

Cellulose solution was used for coating and it was prepared by dissolving pulp cellulose in Urea-Thiourea-NaOH-Water solvent system. Reactive Red 240 dye was used for dyeing the coated as well as control cotton fabric. The effect of cellulose coating on the dyeing properties of cotton fabric was studied by measuring K/S values of the coated substrate at various concentrations of cellulose and dye. K/S value decreased after coating cellulose on the surface of cotton fabric. The lightness of cotton fabric increased after cellulose coating. SEM micrographs revealed that coated cellulose was attached to cotton fibers. Tensile strength increased after cellulose coating.

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