Preparation of environmental samples for chemical speciation of metal/metalloids: A review of extraction techniques

Talanta ◽  
2021 ◽  
Vol 226 ◽  
pp. 122119
Author(s):  
José Lucas Martins Viana ◽  
Amauri Antônio Menegário ◽  
Anne Hélène Fostier
Keyword(s):  
Environmental Samples ◽  
Chemical Speciation ◽  
Extraction Techniques

Heavy metals speciation with prediction model for heavy metal mobility and risk assessment in mine-affected soils

2020 ◽  
Author(s):  
Jaeyoung Choi ◽  
Yongtae Ahn
Keyword(s):  
Heavy Metals ◽  
Chemical Speciation ◽  
Correlation Coefficients ◽  
Carcinogenic Risk ◽  
Metal Mobility ◽  
Mobility Prediction ◽  
Extraction Techniques ◽  
Heavy Metal Mobility ◽  
Local Residents ◽  
Total Concentrations

<p>Heavy metals from mines affect soil and groundwater, cause aand severely impact on the health of local residents. The soil samples were characterized the for distribution, and by the chemical speciation method , and then estimated the human health risks of the two mine-affected soils after stabilization were estimated. Two extraction techniques (Tessier and Wenzel methods) were applied to fractionate metals, such as arsenic (As) and zinc (Zn), to quantify the chemical status of metals in the soils. The mobility of As and Zn was predicted using ASTM test and sequential extraction (Tessier and Wenzel) methods results. The correlation coefficients of As and Zn mobility prediction using Tessier and Wenzel Fraction 1 were (0.920 and 0.815), respectively. Sum The of fractionsum of fractions (F1+F2+F3) showed the highest correlation coefficients value and F value for mobility prediction of both As and Zn. The hazardous indices (HI) for non-carcinogenic risk and carcinogenic risk (CR) to humans were evaluated according to the pseudo-total concentrations of metal in soils. The CR values of carcinogenic for As were within the ranges from 1.38 × 10<sup>-4</sup> to 1.25 × 10<sup>-3</sup> and 3.71 × 10<sup>-4</sup> to 3.35 × 10<sup>-3</sup> for both Young Dong (YD) and Dea San (DS), respectively. The HI for non-carcinogenic risk was highest for As in the YD (2.77) and DS (7.46) soils, which covered approximately 96 and 84% of HI, respectively. In summary, the contribution of As to risk from heavy metals was dominant.</p>

The Speciation Transformation of Cd, Pb in Sludge Biology Leaching

2011 ◽  
Vol 356-360 ◽  
pp. 157-160
Author(s):  
Jin Zhi Huo ◽  
Zeng Zhang Wang ◽  
Chi Zhang
Keyword(s):  
Chemical Speciation ◽  
Elemental Sulfur ◽  
Sampling Period ◽  
Extraction Techniques ◽  
Indirect Mechanism ◽  
Major Process ◽  
Before And After ◽  
Combined Action ◽  
Leaching Condition ◽  
Filter Mechanism

This paper presents a systematic study of the biometric leaching sequencing batch experiment. The major process parameters include the inoculation amount of bacteria(5%) and substrate concentration(4g/L)(elemental sulfur). The chemical speciation transformation takes place in Biology leaching were measured by sequential extraction techniques. Through which before and after the leaching we can Analyze the filter mechanism and leaching ability. According to Cd, Pb content of each chemical speciation before and after the leaching, the release rules of different chemical speciation for each elements in every sampling period were calculated. This paper also analyzed the leaching ability of different chemical speciation in different leaching condition. The results indicated that,Cd drains out through the indirect mechanism, Pb drainings is mainly completes by direct machine-made and the indirect mechanism combined action.

scholarly journals Arsenic, Antimony, Chromium, and Thallium Speciation in Water and Sediment Samples with the LC-ICP-MS Technique

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Magdalena Jabłońska-Czapla
Keyword(s):  
Environmental Samples ◽  
Chemical Speciation ◽  
Speciation Analysis ◽  
Chemical Forms ◽  
Complex Matrix ◽  
Hyphenated Techniques ◽  
Sediment Samples ◽  
Hyphenated Technique ◽  
Water And Sediment ◽  
Icp Ms

Chemical speciation is a very important subject in the environmental protection, toxicology, and chemical analytics due to the fact that toxicity, availability, and reactivity of trace elements depend on the chemical forms in which these elements occur. Research on low analyte levels, particularly in complex matrix samples, requires more and more advanced and sophisticated analytical methods and techniques. The latest trends in this field concern the so-called hyphenated techniques. Arsenic, antimony, chromium, and (underestimated) thallium attract the closest attention of toxicologists and analysts. The properties of those elements depend on the oxidation state in which they occur. The aim of the following paper is to answer the question why the speciation analytics is so important. The paper also provides numerous examples of the hyphenated technique usage (e.g., the LC-ICP-MS application in the speciation analysis of chromium, antimony, arsenic, or thallium in water and bottom sediment samples). An important issue addressed is the preparation of environmental samples for speciation analysis.

Sign in / Sign up

Export Citation Format

Share Document