In a study published in Chemical Science, a research group led by Prof. YUAN Daqiang from the Fujian Institute of Research on the Structure of Matter of the Chinese Academy of Sciences reported seven new water-robust POCs linked by hydrazone bonds.

Researchers at Kanazawa University report in Chemical Communications how solvents influence the strength of donor–acceptor interactions.  They found that silicone solvents, providing low compatibility, intensify donor–acceptor interactions between aromatic molecules compared to hydrocarbon solvents.

This research work preliminarily proves the feasibility of using the biomimetic multilayer core-shell structure to prepare smart multicolor fluorescent polymer hydrogels, which is expected to play an important role in the application of seafood freshness detection, information security and encryption, and flexible discoloration skin.

1. The size of the flocs, 2. The characteristics of the sludge, 3. The ionicity of polyacrylamide, 4. The dissolution of polyacrylamide, 5. When using a composite flocculant, you must pay attention to the order of addition and the time interval of dosing .

Based on previous findings on AIE-active FPHs, Prof. CHEN Tao and colleagues at the Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS), systematically summarized the recent progress in this young but flourishing research area, with particular focus on the design and preparation of AIE-active FPHs. The study was published in Aggregate.

Polyacrylamide applications include: water treatment, sewage treatment and industrial water treatment; oil field chemical treatment agents, widely used as retention aids, filter aids, and leveling agents in the papermaking field; and used in medical materials; food industry, etc.

The viscosity of polyacrylamide solution mainly reflects the internal frictional resistance between liquid molecules due to flow or relative movement. The internal friction resistance is related to the structure of the polymer, the nature of the solvent, the concentration of the solution, temperature and pressure and other factors.

Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)n. Polyacrylamide has a wide range of applications in industries such as petroleum exploration, water treatment, textiles, papermaking, mineral processing, medicine, and agriculture.

The cationic group in the colour-fixing agent molecule and the anionic group in the dyestuff molecule are used to form an ionic bond to form a deposit on the fiber, thus reducing the water-solubility of the dyestuff and improving the color fastness of the dyed fabric.

The fixing agent can improve the washing fastness of the dye and resist the bad influence of the atmosphere on the dye. Common types of fixing agent: metal salt fixing agent, cationic fixing agent, reactive fixing agent.

The commercial production of microbial flocculants began in the 1990s. Because there is no secondary pollution, it is convenient to use and has an attractive application prospect.

Flocculants are widely used in water treatment. They are synthetic polyacrylamide series products, mainly divided into anionic, cationic, nonionic and zwitterionic. Polyacrylamide (polyacrylamide), often abbreviated as PAM.

Main Types of organic polymer flocculants: 1. It is made based on natural polymer organic matter and chemical treatment to increase its active group content. 2. Polyacrylamide series products synthesized by modern organic chemical methods. 3. It is made by grafting (or copolymerizing) natural raw materials and polyacrylamide.

Mainly divided into two categories: iron preparation series and aluminum preparation series, of course, also includes its cluster of high polymer series.

According to its chemical composition, flocculants can be divided into inorganic flocculants and organic flocculants. Among them, inorganic flocculant includes inorganic coagulant and inorganic polymer flocculant; organic flocculant includes synthetic organic polymer flocculant, natural organic polymer flocculant and microbial flocculant.

Researchers have made new progress in the construction of three-dimensional flexible surface-enhanced Raman scattering (SERS) substrate and its rapid and sensitive response to organic pollutants.

PDMDAAC series flocculants are excellent decolorizing agents, which are suitable for wastewater containing disperse dyes, and also have good decolorizing effects for wastewater containing reactive dyes that are difficult to treat.

Related research results are published on "Environmental Pollution" under the title "Antibiotics control in aquaculture requires more than antibiotic-free feeds: A tilapia farming case".

Like the food packaging and chemical industries, the pharmaceutical industry also relies on nitrogen for various applications. In fact, pharmaceutical companies need reliable sources of high-purity nitrogen and can benefit from generating their own nitrogen internally to reduce costs while controlling quality and improving efficiency.

The technical methods used in wastewater treatment mainly include filtration technology, separation technology, sedimentation technology, biofilm technology, adsorption technology, etc