Removal of hexenuronic acid to reduce AOX formation in hot chlorine dioxide bleaching of bagasse pulp

Zhang, Haichuan; Nie, Shuangxi; Qin, Chengrong; Wang, Shuangfei

doi:10.1016/j.indcrop.2018.11.025

Cited by 34 publications

(12 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second zone (200–400 °C) corresponds to the active pyrolysis of the lignocellulosic components and is where the main degradation of the samples, including the maximum degradation temperature (T max ) shown by the DTG curve. In the third zone (temperature above 400 °C) the passive pyrolysis of the lignocellulosic components takes places, where the low degradation ratio stands out and is identified with the lignin degradation and any carbonaceous matter decomposition [ 35 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

Horticultural Plant Residues as New Source for Lignocellulose Nanofibers Isolation: Application on the Recycling Paperboard Process

et al. 2020

View full text Add to dashboard Cite

Horticultural plant residues (tomato, pepper, and eggplant) were identified as new sources for lignocellulose nanofibers (LCNF). Cellulosic pulp was obtained from the different plant residues using an environmentally friendly process, energy-sustainable, simple, and with low-chemical reagent consumption. The chemical composition of the obtained pulps was analyzed in order to study its influence in the nanofibrillation process. Cellulosic fibers were subjected to two different pretreatments, mechanical and TEMPO(2,2,6,6-Tetramethyl-piperidin-1-oxyl)-mediated oxidation, followed by high-pressure homogenization to produce different lignocellulose nanofibers. Then, LCNF were deeply characterized in terms of nanofibrillation yield, cationic demand, carboxyl content, morphology, crystallinity, and thermal stability. The suitability of each raw material to produce lignocellulose nanofibers was analyzed from the point of view of each pretreatment. TEMPO-mediated oxidation was identified as a more effective pretreatment to produce LCNF, however, it produces a decrease in the thermal stability of the LCNF. The different LCNF were added as reinforcing agent on recycled paperboard and compared with the improving produced by the industrial mechanical beating. The analysis of the papersheets’ mechanical properties shows that the addition of LCNF as a reinforcing agent in the paperboard recycling process is a viable alternative to mechanical beating, achieving greater reinforcing effect and increasing the products’ life cycles.

show abstract

Section: Resultsmentioning

confidence: 99%

Horticultural Plant Residues as New Source for Lignocellulose Nanofibers Isolation: Application on the Recycling Paperboard Process

et al. 2020

View full text Add to dashboard Cite

show abstract

“…With the improvement of social demands on the environment, and the pollution of pulp bleaching wastewater becomes more and more serious which aroused wide attention of the whole society. Especially, adsorbable organic halogen (AOX) produced during pulp bleaching is lipophilic, can be accumulated in the organism, difficult to degrade, and has a strong carcinogenic and harm to biological endocrine system (Sow et al, 2014 (Zhang et al, 2018a). Isoaho et al studied the degradation of AOX in the wastewater of cork sulfate pulp mill and found AOX removal rate was about 70% under certain Fenton reaction conditions (Isoaho et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Study on Measurement Model of Lignin Content in Pulp After Alkaline Extraction

Chen

Yin

et al. 2021

Journal of Environmental Engineering and Landscape Management

View full text Add to dashboard Cite

Because kappa number cannot accurately represent the lignin content in the pulp after alkaline extraction, lead to the excessive dosage of bleaching chemicals added and the pollutant content increases. In order to accurately determine the dosage of bleaching agent, reduce pollutant emissions, a prediction model of lignin content of pulp was established by analyzing the correlation between lignin content and alkaline extraction conditions in this paper. The results show that the established soft sensor model can accurately measure lignin content, it is helpful to determine the amount of bleaching agent more accurately, reduce pollutant generation after pulp bleaching.

show abstract

“…Recently, some new progress has been made in the study of chlorine dioxide; e.g., Zhang et al [28] studied the effects of the hemicellulose-linked hexenuronic acid (HexA) on the kappa number, brightness reversion, and effluent properties at the hot chlorine dioxide bleaching (D-hot) stage; Nie et al [29] studied the kinetics of oxidation of 1-(3,4-dimethoxyphenyl)ethanol (MVA), a lignin model compound, with chlorine dioxide under simulated bleaching conditions, which might open a new door for resolving the major problems of environmental pollution in elemental chlorine-free (ECF) bleaching of pulp. In the study of Nie et al [30], xylanase-aided chlorine dioxide bleaching of bagasse pulp was investigated; this method decreased the chlorine dioxide demand and, thus, reduced the formation of adsorbable organic halides (AOX).…”

Section: Introductionmentioning

confidence: 99%

Preparation of High‐Purity Chlorine Dioxide by Combined Reduction

et al. 2020

Chem Eng & Technol

Self Cite

View full text Add to dashboard Cite

In pulp bleaching, water treatment, and other applications, chlorine dioxide has the advantages of high‐efficiency oxidation. The technology of preparing chlorine dioxide by combination reduction is widely used in domestic papermaking enterprises. However, in the actual production process, the chlorine dioxide solution still contains a small amount of chlorine gas and methanol. Therefore, here, the process of preparing chlorine dioxide by combination reduction was further optimized to improve the utilization rate of raw materials and product purity. In this study, a new production process of chlorine dioxide with lower cost, higher purity, no pollution, and good security and reliability was developed.

show abstract

Removal of hexenuronic acid to reduce AOX formation in hot chlorine dioxide bleaching of bagasse pulp

Cited by 34 publications

References 39 publications

Horticultural Plant Residues as New Source for Lignocellulose Nanofibers Isolation: Application on the Recycling Paperboard Process

Horticultural Plant Residues as New Source for Lignocellulose Nanofibers Isolation: Application on the Recycling Paperboard Process

Study on Measurement Model of Lignin Content in Pulp After Alkaline Extraction

Preparation of High‐Purity Chlorine Dioxide by Combined Reduction

Contact Info

Product

Resources

About