Shape stable poly(vinyl alcohol) hydrogels with immobilized activated sludge at repeated dry-rewet cycles

Wang, Po‐Hsun; Chang, Yin-Ru; Lee, Dong Hoon

doi:10.1016/j.biortech.2019.121662

Cited by 17 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quality is one of the most important factors that needs to be considered in the sludge industry, which includes its chemical and physical characteristics [4]. Additionally, the levels of nutrients and pollutants in sludge can be an issue [5], for which their degree of stability and how they were produced are relevant [6]. All these factors are highly important when assessing sludge quality [7].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

et al. 2021

View full text Add to dashboard Cite

This study evaluated biosolid quality over time and the efficiency of using amounts (5 and 7 kg/m2) of municipal class A biosolids in Qatar to fertilize tomato plants (Solanum lycopersicum). Random samples were subjected to physical and chemical analysis, which revealed excellent particle uniformity and stability with minor odor defects. The analysis confirmed the product was nutrient-rich while pollutant levels were below the international standards. The nominated rates were used to fertilize tomato plants in pots grown in a greenhouse for four months with a control treatment of manure and Peat-Moss, before measuring the plant biological characteristics. Plants were examined via chemical analysis of nutrients and pollutants both for the whole plant and for stems, fruits, and leaves. Results indicated that both experimental treatments enhanced plant growth and development as compared to the control treatment. However, the chemical analyses also revealed levels of zinc, copper, and manganese in the plant fruits that were well in excess of the maximum acceptable levels, as defined by international health organizations. This study found that while the application of class A biosolids as organic fertilizer for tomato plants greatly enhanced the overall plant growth, the plant fruits contained toxic levels of trace heavy metals.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

et al. 2021

View full text Add to dashboard Cite

show abstract

“…It is a water-soluble polymer with controlled fluidity, which contains up to 99% of hydroxyls on its main molecule chain. The easy processing property, environmentally friendly nature, low cost, and abundant functional groups makes PVA a popular material in network establishment both in physically and chemically compounded materials, such as hydrogels [6][7][8]. PVA has excellent mobility, which is usually used to penetrate the surface of porous materials and to form smooth and stable bond lines.…”

Section: Introductionmentioning

confidence: 99%

Ferric Ions Modified Polyvinyl Alcohol for Enhanced Molecular Structure and Mechanical Performance

Liu

et al. 2020

Materials

View full text Add to dashboard Cite

The highly crystallized molecular structure of polyvinyl alcohol (PVA) makes the polymer with poor performance in mechanical strength and water resistance. To modify the molecular structure of PVA and to diminish the complicated procedures and environmental impacts, ferric ions (in ion composite form) have been used to set the interactions with the molecule chains of PVA. The crystallinity, chemical groups change, and mechanical performance of the polymer has been confirmed by X-ray diffraction (XRD), Fourier transform infrared spectroscope (FTIR), and the bonding/membrane tensile strength test. The crystallinity of PVA is reduced from 41.6% to 7.7% with the addition of 2.0% of ferric ions. The tensile strength of the modified PVA membrane is increased by 240%. Moreover, with tougher structure and improved fluidity, the strength of ferric ions modified PVA bonded wood samples is increased by 157%. The modification of PVA with ion composite may have vast applications in many fields, such as paper industry, wood adhesives, functional materials, and polymer structure design.

show abstract

A Simply Synthesized Shaking‐induced Small Molecule System with Repeatable and Instantaneous Discoloration Response

Yan,

Liu,

Zhang

et al. 2024

Chemistry A European J

View full text Add to dashboard Cite

Force‐related discoloration materials are highly valuable because of their characteristics of visualization, easy operation, and environment friendliness. Most force‐related discoloration materials focus on polymers and depend on bond scission, which leads to insensitivity and unrecoverable. Small‐molecule systems based on well‐defined molecular structures and simple composition with high sensitivity would exhibit considerable mechanochromic potential. However, to date, researches about force‐related discoloration materials based on small molecule solution remain limited and are rarely reported. In this study, we developed a repeatable and instantaneous discoloration small molecule solution system by simple one‐pot synthesis method. It exhibited an instantaneous chromic change from yellowish to dark green under shaking and reverting back to yellow within 1 minute after removal of the shaking. Experimental results confirmed that the discoloration mechanism is attributed to the oscillation accelerating the production of unstable ortho‐OH phenoxyl radical. The newly developed shaking‐induced discoloration small molecule system (SDSMS) promises in field of mechanical force sensing and optical encryption.

show abstract

Shape stable poly(vinyl alcohol) hydrogels with immobilized activated sludge at repeated dry-rewet cycles

Cited by 17 publications

References 21 publications

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

Ferric Ions Modified Polyvinyl Alcohol for Enhanced Molecular Structure and Mechanical Performance

A Simply Synthesized Shaking‐induced Small Molecule System with Repeatable and Instantaneous Discoloration Response

Contact Info

Product

Resources

About