Persistence of Two Common Chemical Oxidants for Soil and Groundwater Remediation: Impacts of Water Chemistry and Subsurface Minerals

Ma, Jie; Wen, Jing; Yang, Xin; Liu, Yanbo; Zhai, Guangyao; Liu, Hanyu; Yue, Gangsen; Dong, Huaxia; Zhang, Ping

doi:10.1007/s11270-022-05824-1

Cited by 3 publications

(2 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with acid-hydrolyzed starch, oxidized starch has a lower viscosity ratio between cold and hot paste compared with raw starch, making it less prone to retrogradation and widely used as a sizing agent to improve the mechanical and film-forming properties of textiles (Vanier et al 2017). Researchers used hydrogen peroxide (Broekman et al 2023;Hou et al 2007;Sangseethong et al 2010), sodium hypochlorite (Carlos Bustillos-Rodriguez et al 2019;Xu et al 2022;, potassium permanganate (Ma et al 2022), sodium periodate (Ozkan & Ozgunay 2021;Xi et al 2022), chlorine dioxide (Guo et al 2014), ozone gas (Chan et al 2011;Chan et al 2009), persulfate, and other oxidants to promote the oxidation of starches from different sources. However, oxidized starch is affected by the presence of α-1,4-glycosidic bonds are sensitive to heat, shear, and oxidation, resulting in poor viscosity and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Oxidation and cross-linking to improve stability and sizing properties of cassava starch with ammonium persulfate-assisted hexamethylenetetramine

Wang

Qian

et al. 2023

Preprint

View full text Add to dashboard Cite

An oxidation cross-linking modified cassava starch (AHS) with high thermal viscosity stability and good film-forming property was synthesized by oxidation cross-linking and amidation reaction，which used ammonium persulfate (APS) as the oxidant, hexamethylenetetramine (HMT) as the cross-linking agent and urea as an assistant. The results of Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H NMR) showed that compared with cassava starch, the strength of the hydroxyl peak on the AHS structure changed, and the strength of the intramolecular hydrogen bond decreased. The crosslinking agent HMT releases formaldehyde under heating conditions to crosslink oxidized starch. The auxiliary urea undergoes an amidation reaction to form amide bonds while adsorbing residual formaldehyde, improving the toughness of the AHS sizing film. When the APS usage is 0.4% (carboxyl content is 0.3024%), the HMT usage is 0.35% (sedimentation volume is 7.8mL), and urea usage exceeds 3%, the viscosity thermal stability of the AHS sizing agent is well (97.12%), and the elongation of the sizing film can reach 2.97%. Finally, The AHS sizing agent can improve the tensile properties and wear resistance of cotton yarn. This study overcomes the toxic substance emissions caused by traditional aldehyde crosslinking agents, improves the viscosity stability of the starch sizing agent, and provides a new approach to improving the viscosity thermal stability and film-forming properties of starch sizing agents.

show abstract

Section: Introductionmentioning

confidence: 99%

Oxidation and cross-linking to improve stability and sizing properties of cassava starch with ammonium persulfate-assisted hexamethylenetetramine

Wang

Qian

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Compared with acid-hydrolyzed starch (HS), oxidized starch has a lower viscosity ratio between cold and hot paste compared with raw starch, making it less prone to retrogradation and widely used as a sizing agent to improve the mechanical and film-forming properties of textiles. 5 Researchers have used hydrogen peroxide, [6][7][8] sodium hypochlorite, [9][10][11] potassium permanganate, 12 sodium periodate, 13,14 chlorine dioxide, 15 ozone gas, 16,17 persulfate and other oxidants to promote the oxidation of starches from different sources. However, oxidized starch is affected by the presence of a-1,4-glycosidic bonds and is sensitive to heat, shear and oxidation, resulting in poor viscosity and viscosity stability.…”

mentioning

confidence: 99%

Oxidation and cross-linking to improve stability and sizing properties of cassava starch with ammonium persulfate-assisted hexamethylenetetramine

Wang,

Qian,

et al. 2023

Textile Research Journal

View full text Add to dashboard Cite

An oxidation cross-linking modified cassava starch (AHS-U) with high-viscosity stability and good film-forming properties was synthesized by oxidation cross-linking reaction, which used ammonium persulfate (APS) as the oxidant, hexamethylenetetramine (HMT) as the cross-linking agent and urea as an assistant. The results of Fourier transform infrared spectroscopy and nuclear magnetic resonance showed that compared with cassava starch, APS oxidized starch exhibited carboxyl characteristic peaks in its structure, and the hydroxyl proton peak that was connected at the C6 position basically disappeared in the APS-HMT modified cassava starch (AHS). The cross-linking agent HMT released formaldehyde under heating conditions to cross-link oxidized starch. The urea formed hydrogen bonds with hydroxyl groups in the starch while adsorbing residual formaldehyde, which improved the viscosity stability of the sizing agent. When the APS dosage was 0.4% (the carboxyl content was 0.30%), the HMT dosage was 0.35% (the sedimentation volume was 7.8 mL) and the urea dosage was 2%, the viscosity stability of the AHS-U sizing agent was good under high-temperature conditions (97.12%), and the elongation of the sizing film reached 2.97%. The AHS-U sizing agent can improve the tensile properties and wear resistance of cotton yarn and has a good desizing efficiency. This study overcomes the toxic substance emissions caused by traditional aldehyde cross-linking agents, improves the viscosity stability of the starch sizing agent and provides a new approach to improving the viscosity stability and film-forming properties of starch sizing agents.

show abstract

Peroxydisulfate Persistence in ISCO for Groundwater Remediation: Temperature Dependence, Batch/Column Comparison, and Sulfate Fate

McGachy,

Škarohlíd,

Kostrakiewicz

et al. 2024

Water

View full text Add to dashboard Cite

The persistence of peroxydisulfate anion (S2O82−) in soil is a key factor influencing the effectiveness of in situ chemical oxidation (ISCO) treatments, which use S2O82− (S2O82− based ISCO) to remediate contaminated groundwater. However, only a few studies have addressed aspects of S2O82− persistence, such as the effect of temperature and the fate of sulfates (SO42−) generated by S2O82− decomposition in real soil and/or aquifer materials. Additionally, there are no studies comparing batch and dynamic column tests. To address these knowledge gaps, we conducted batch tests with varying temperatures (30–50 °C) and initial S2O82− concentrations (2.7 g/L and 16.1 g/L) along with dynamic column experiments (40 °C, 16.1 g/L) with comprehensively characterized real soil/aquifer materials. Furthermore, the principal component analysis (PCA) method was employed to investigate correlations between S2O82− decomposition and soil material parameters. We found that S2O82− decomposition followed the pseudo-first-order rate law in all experiments. In all tested soil materials, thermal dependence of S2O82− decomposition followed the Arrhenius law with the activation energies in the interval 65.2–109.1 kJ/mol. Decreasing S2O82− concentration from 16.1 g/L to 2.7 g/L led to a several-fold increase (factor 2–11) in bulk S2O82− decomposition rate coefficients (k′) in individual soil/aquifer materials. Although k′ in the dynamic column tests showed higher values compared to the batch tests (factor 1–3), the normalized S2O82− decomposition rate coefficients to the total BET surface were much lower, indicating the inevitable formation of preferential pathways in the columns. Furthermore, mass balance analysis of S2O82− decomposition and SO42− generation suggests the ability of some systems to partially accumulate the produced SO42−. Principal Component Analysis (PCA) identified total organic carbon (TOC), Ni, Mo, Co, and Mn as key factors influencing the decomposition rate under varying soil conditions. These findings provide valuable insights into how S2O82− behaves in real soil and aquifer materials, which can improve the design and operation of ISCO treatability studies for groundwater remediation.

show abstract

Persistence of Two Common Chemical Oxidants for Soil and Groundwater Remediation: Impacts of Water Chemistry and Subsurface Minerals

Cited by 3 publications

References 41 publications

Oxidation and cross-linking to improve stability and sizing properties of cassava starch with ammonium persulfate-assisted hexamethylenetetramine

Oxidation and cross-linking to improve stability and sizing properties of cassava starch with ammonium persulfate-assisted hexamethylenetetramine

Oxidation and cross-linking to improve stability and sizing properties of cassava starch with ammonium persulfate-assisted hexamethylenetetramine

Peroxydisulfate Persistence in ISCO for Groundwater Remediation: Temperature Dependence, Batch/Column Comparison, and Sulfate Fate

Contact Info

Product

Resources

About