scholarly journals Optimizing soil washing remediation of mercury contaminated soil using various washing solutions and solid/liquid ratios

2020 ◽  
Vol 148 ◽  
pp. 05004
Author(s):  
Agus Jatnika Effendi ◽  
Vina Lestari ◽  
Mohammad Irsyad
Keyword(s):  
Distribution Coefficient ◽  
Potassium Iodide ◽  
Contaminated Soil ◽  
Soil Washing ◽  
Mercury Contamination ◽  
Small Scale ◽  
Gold Extraction ◽  
Washing Process ◽  
Fractionation Analysis ◽  
Solid Liquid

Most of the artisanal and small-scale gold miners in Indonesia as in the case of those who are in Banten Province, still use the amalgamation process in the gold extraction process. Therefore, mercury contamination could not be avoided. As a result, it was found that the concentration of mercury-contaminated soil in Lebak, Banten Province was detected as high as 136,9 mg/kg. Since the contamination process occurred for a long time, making the formation and mobility of complex mercury in soil increased by time. Soil washing is one remediation technology that can be applied in the recovery of mercury-contaminated soil. This study aims to determine the optimum conditions of the soil washing process: effect of pH, the concentration of washing solutions and ratio of solid/liquid. Furthermore, the value of the distribution coefficient, desorption of mercury in the soil and fractionation of mercury in the soil were also observed. Potassium Iodide was found to be the best washing solution among others used in this study. The optimum condition was obtained at pH 2, the concentration of washing solution at 0.25 M and the solid/liquid ratio of 1:15. Under these conditions, mercury desorption efficiency reached 86.9% with the value of the distribution coefficient of 0.185. Mercury fractionation analysis in the contaminated soil showed that the mobile > semi-mobile > non-mobile fractions. Potassium iodide was able to desorb at about 84% of mobile fractions, 97% of semi-mobile and 25% non-mobile mercury.

scholarly journals Removal Characteristics of Lead-contaminated Soil at Military Shooting Range by Using Soil Washing Process

2012 ◽  
Vol 18 (4) ◽  
pp. 390-397
Author(s):  
Sung-Kyun Ahn ◽  
Chul Kim ◽  
Joung-Man Lee ◽  
Gang-Choon Lee ◽  
Zang-Ho Shon ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Soil Washing ◽  
Shooting Range ◽  
Washing Process

scholarly journals Removal zinc ions from contaminated soil using biodegradable polyaspartate via soil washing process

2019 ◽  
Vol 1349 ◽  
pp. 012146
Author(s):  
N D Mu’azu ◽  
M H Essa ◽  
S A Haladu ◽  
S A Ali ◽  
N Jarrah ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Soil Washing ◽  
Zinc Ions ◽  
Washing Process

A Review of Remediation of Chromium Contaminated Soil by Washing with Chelants

2013 ◽  
Vol 838-841 ◽  
pp. 2625-2629
Author(s):  
Yan Kun Zhang ◽  
Shuo Qi ◽  
Hong Han Chen
Keyword(s):  
Contaminated Soil ◽  
Soil Washing ◽  
Controlling Factors ◽  
Metal Contaminants ◽  
Washing Process ◽  
Treatment Alternatives

This paper reviews current progress and technologies of removal of chromium (Cr) from soil by washing with chelants. The applications of soil washing with chelants are noted;the major controlling factors in soil washing process are discussed; the mechanism of removal of Cr in soil using chelants is reviewed. Soil washing is one of the few permanent treatment alternatives to remove metal contaminants from soils. The chelant reagent has the most influence on washing effect.

scholarly journals Characterization of potential mercury contamination in the ASGM area of Mandailing Natal, North Sumatera

2021 ◽  
Vol 882 (1) ◽  
pp. 012062
Author(s):  
H Astika ◽  
S Handayani ◽  
R Damayanti ◽  
W Surono ◽  
Maryono ◽  
...  
Keyword(s):  
River Sediments ◽  
Ecological Impacts ◽  
Mercury Contamination ◽  
Small Scale ◽  
Gold Extraction ◽  
Grab Sampling ◽  
The North ◽  
Soils And Sediments ◽  
Area Sampling

Abstract A large amount of Hg is used for gold extraction through the amalgamation process in the Mandailing Natal derived from artisanal and small-scale gold mining (ASGM) area located in the North Sumatera Province, Indonesia. The objective of this work was to characterize the potential contamination of total Hg in water, sediments, and soil in this ASGM area. Sampling was done in two locations in West Panyabungan and Huta Bargot Districts using grab sampling method. Results showed that accumulation of Hg in the studied soils and sediments was the highest, but Hg in aquatic solution was below the detection limit of the analytical method of the studied community wells and rivers. The highest concentration of Hg was found in the river sediments of the Saba Padang irrigation (1,63 mg/kg), and in the soil of the plantation area of Huta Bargot (1,62 mg/kg) respectively. These concentrations may pose a serious problem for aquatic and land life, related ecosystems, and human health. For further study, there is a need to study Hg availability in riverine biota to better understand the cycling of Hg in this ASGM area. Understanding the ecological impacts can assist in the prioritizing of impact mitigation efforts.

Investigation for Optimization of Ultrasonic Soil-Washing Process for Remediation of Diesel Contaminated Soil

2011 ◽  
Vol 11 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Beom-Guk Park ◽  
Young-Gyu Son ◽  
An-Na Hwang ◽  
Jee-Hyeong Khim
Keyword(s):  
Contaminated Soil ◽  
Soil Washing ◽  
Washing Process

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
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