scholarly journals Lead and copper removal from multi-metal contaminated soils through soil washing technique using humic substances as washing agents: the influence of the washing solution pH

2019 ◽  
Vol 64 (1) ◽  
pp. 41-52
Author(s):  
Gianina Elena Damian ◽  
◽  
Valer Micle ◽  
Ioana Monica Sur ◽  
◽  
...  
Keyword(s):  
Humic Substances ◽  
Contaminated Soils ◽  
Soil Washing ◽  
Copper Removal ◽  
Solution Ph

Removal of Heavy Metals from Contaminated Soils by Washing with Citric Acid and Subsequent Treatment of Soil-Washing Solutions

2014 ◽  
Vol 937 ◽  
pp. 646-651 ◽  
Author(s):  
Lei Sun ◽  
Han Qiao Liu ◽  
Guo Xia Wei ◽  
Zhen Hua Wu ◽  
Wei Yang
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Citric Acid ◽  
Contaminated Soils ◽  
Mixing Time ◽  
Soil Washing ◽  
Subsequent Treatment ◽  
Solution Ph ◽  
Citric Acid Concentration ◽  
Operating Variables

Soil washing experiments were carried out with citric acid as washing reagent for the remediation of soils highly contaminated with heavy metals, then activated carbon was used in absorption processing for leaching solution. In this study, the effects of the main operating variables for removal of metals from soils were first discussed. The results showed that 36.% Pb, 47.74% Cu and 61.88% Cd were removed from the contaminated soils by optimizing the washing parameters at citric acid concentration 0.2 mol/l, mixing time 2 h, liquid-soil ratio 20 and solution pH=4, respectively. In the adsorption experiments of leachates, the optimum conditions were found as follows: solution pH=7, mixing time of 2 h, standing time of 60 min and activated carbon dosage of 1g/100ml.

scholarly journals Applicability of soil washing method for radionuclide-contaminated soils from road maintenance in Fukushima

2015 ◽  
Vol 10 (4) ◽  
pp. 489-502
Author(s):  
Osamu TAKAHATA ◽  
Shojirou KUMADA ◽  
Junya ANDO ◽  
Shinji MIYAGUCHI ◽  
Koji ISHIYAMA ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Soil Washing ◽  
Road Maintenance ◽  
Washing Method

Soil Washing Enhanced by Humic Substances and Biodegradable Chelating Agents

2014 ◽  
Vol 23 (6) ◽  
pp. 599-613 ◽  
Author(s):  
Neil R. Hartley ◽  
Daniel C. W. Tsang ◽  
William E. Olds ◽  
Paul A. Weber
Keyword(s):  
Humic Substances ◽  
Chelating Agents ◽  
Soil Washing

Enhanced Techniques of Soil Washing for the Remediation of Heavy Metal-Contaminated Soils

2018 ◽  
Vol 7 (2) ◽  
pp. 99-104 ◽  
Author(s):  
Xu Yang ◽  
Xinyu Mao ◽  
Xiaohou Shao ◽  
Fengxiang Han ◽  
Tingting Chang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Contaminated Soils ◽  
Soil Washing

Soil washing with solutions of humic substances from manure compost removes heavy metal contaminants as a function of humic molecular composition

Chemosphere ◽  
2019 ◽  
Vol 225 ◽  
pp. 150-156 ◽  
Author(s):  
Alessandro Piccolo ◽  
Riccardo Spaccini ◽  
Antonio De Martino ◽  
Francesco Scognamiglio ◽  
Vincenzo di Meo
Keyword(s):  
Heavy Metal ◽  
Humic Substances ◽  
Soil Washing ◽  
Molecular Composition ◽  
Metal Contaminants ◽  
Manure Compost ◽  
Heavy Metal Contaminants

Application of Soil Washing Treatment Method for the Remediation of Petroleum Polluted Soil

2020 ◽  
pp. 476-501
Author(s):  
Abdullahi Evuti Mohammed ◽  
Kamoru Adio Salam ◽  
Silas Shamaye Samuel
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Contaminated Soils ◽  
Soil Washing ◽  
Treatment Method ◽  
Petroleum Products ◽  
Gas Chromatography Mass Spectrometry ◽  
Detergent Concentration ◽  
Polycyclic Aromatic ◽  
Percentage Removal

The increasing contamination of soil by petroleum products has been a great source of concern to our society because of its negative consequences on the environment. Thus, several remediation technologies and trials have been propounded for a crude oil-polluted environment. This chapter reviews the dynamics of pollutants in the soil and the various treatment technologies for petroleum-polluted soils viz physico-chemical, thermal, and biological treatment methods. Authors experimented on soil washing using detergent for the remediation of petroleum contaminated soils considering different concentrations. The percentage removal of aliphatic and Polycyclic Aromatic Hydrocarbons (PAHs) was determined using Gas Chromatography Mass Spectrometry (GC-MS). The highest percentage removal efficiencies of 97.55% and 61.41% for aliphatic and Polycyclic Aromatic Hydrocarbons were obtained at detergent concentration of 20w/v% respectively.

scholarly journals Effect of Soil Washing Solutions on Simultaneous Removal of Heavy Metals and Arsenic from Contaminated Soil

2020 ◽  
Vol 17 (9) ◽  
pp. 3133 ◽  
Author(s):  
Kanghee Cho ◽  
Eunji Myung ◽  
Hyunsoo Kim ◽  
Cheonyoung Park ◽  
Nagchoul Choi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Soil Washing ◽  
Metal Extraction ◽  
Simultaneous Removal ◽  
Removal Of Heavy Metals ◽  
Removal Efficiencies

In this study, we investigated the feasibility of using a solution of sulfuric acid and phosphoric acid as an extraction method for soil-washing to remove Cu, Pb, Zn, and As from contaminated soil. We treated various soil particles, including seven fraction sizes, using sulfuric acid. In addition, to improve Cu, Pb, Zn, and As removal efficiencies, washing agents were compared through batch experiments. The results showed that each agent behaved differently when reacting with heavy metals (Cu, Pb, and Zn) and As. Sulfuric acid was more effective in extracting heavy metals than in extracting As. However, phosphoric acid was not effective in extracting heavy metals. Compared with each inorganic acid, As removal from soil by washing agents increased in the order of sulfuric acid (35.81%) < phosphoric acid (62.96%). Therefore, an enhanced mixture solution using sulfuric acid and phosphoric acid to simultaneously remove heavy metals and As from contaminated soils was investigated. Sulfuric acid at 0.6 M was adopted to combine with 0.6 M phosphoric acid to obtain the mixture solution (1:1) that was used to determine the effect for the simultaneous removal of both heavy metals and As from the contaminated soil. The removal efficiencies of As, Cu, Pb, and Zn were 70.5%, 79.6%, 80.1%, and 71.2%, respectively. The combination of sulfuric acid with phosphoric acid increased the overall As and heavy metal extraction efficiencies from the contaminated soil samples. With the combined effect of dissolving oxides and ion exchange under combined washings, the removal efficiencies of heavy metals and As were higher than those of single washings.

scholarly journals Coupling of Anodic Oxidation and Soil Remediation Processes: A Review

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4309 ◽  
Author(s):  
Maiara Barbosa Ferreira ◽  
Aline Maria Sales Solano ◽  
Elisama Vieira dos Santos ◽  
Carlos A. Martínez-Huitle ◽  
Soliu O. Ganiyu
Keyword(s):  
Anodic Oxidation ◽  
Soil Remediation ◽  
Contaminated Soils ◽  
Soil Washing ◽  
Ex Situ ◽  
Combined Processes ◽  
Environmental Consequences ◽  
Efficient Coupling ◽  
Remediation Process

In recent years, due to industrial modernization and agricultural mechanization, several environmental consequences have been observed, which make sustainable development difficult. Soil, as an important component of ecosystem and a key resource for the survival of human and animals, has been under constant contamination from different human activities. Contaminated soils and sites require remediation not only because of the hazardous threat it possess to the environment but also due to the shortage of fresh land for both agriculture and urbanization. Combined or coupled remediation technologies are one of the efficient processes for the treatment of contaminated soils. In these technologies, two or more soil remediation techniques are applied simultaneously or sequentially, in which one technique complements the other, making the treatment very efficient. Coupling anodic oxidation (AO) and soil remediation for the treatment of soil contaminated with organics has been studied via two configurations: (i) soil remediation, ex situ AO, where AO is used as a post-treatment stage for the treatment of effluents from soil remediation process and (ii) soil remediation, in situ AO, where both processes are applied simultaneously. The former is the most widely investigated configuration of the combined processes, while the latter is less common due to the greater diffusion dependency of AO as an electrode process. In this review, the concept of soil washing (SW)/soil flushing (SF) and electrokinetic as soil remediation techniques are briefly explained followed by a discussion of different configurations of combined AO and soil remediation.

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