Novel poly(amino acid)-type superplasticizers with enhanced dispersing performance for Portland cement doped with clay impurities

Ma, Mingzhu; Chen, Huizhu; Zhang, Wei; Feng, Enjuan; Li, Xingjian; Li, Faqiang; Xu, Shoufang; Li, Yinwen

doi:10.1016/j.colsurfa.2021.127953

Cited by 7 publications

(2 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For adsorption kinetic testing, 0.01 g of adsorption beads was thoroughly mixed with 20 mL of MB solution (concentration: 200 mg/L) or Pb(II) solution (concentration: 400 mg/L) at 30 • C. The adsorption capacity of the adsorbent was measured at different contact times (5,15,30,60,120,180,240,360,480, and 600 min, respectively), and the dependence curve of adsorption capacity against time was plotted. When conducting adsorption kinetic tests, the adsorption capacity (q t ) of Pb(II) and cationic dye at time interval t was calculated using Equation (2).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…With multiple amide bonds formed by the condensation of amino and carboxyl groups on the main chain and multiple carboxyl groups on the side chain, PASP is a unique and environmentally friendly water-soluble polymer material with good biocompatibility and biodegradability [29]. In industry, it is often used as a green water reducing agent [30], drug delivery carrier [31], green corrosion inhibitor [32], water retaining agent [33], adsorbent [34], etc. Because the PASP molecular chain contains a large number of functional groups that can be complexed with metal ions, PASP is a potential raw material for the preparation of metal ion adsorbents.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biopolymer Meets Nanoclay: Rational Fabrication of Superb Adsorption Beads from Green Precursors for Efficient Capture of Pb(II) and Dyes

Qi,

Wang,

Zhang

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

Renewable, green, and safe natural biopolymer-derived materials are highly desired for the purification of pollutants, but significantly improving their performance without the introduction of additional harmful chemicals remains a huge challenge. Based on the concept of “structure optimization design,” environment-friendly composite beads (named SA/PASP/RE) with excellent adsorption performance and recyclability were rationally constructed through a green ionic crosslinking route, using the completely green biopolymer sodium alginate (SA), sodium salt of polyaspartic acid (PASP), and the natural nanoclay rectorite (RE) as starting materials. The nano-layered RE was embedded in the polymer matrix to prevent the polymer chain from becoming over-entangled so that more adsorption sites inside the polymer network were exposed, which effectively improved the mass transfer efficiency of the adsorbent and the removal rate of contaminants. The composite beads embedded with 0.6% RE showed high adsorption capacities of 211.78, 197.13, and 195.69 mg/g for Pb(II) and 643.00, 577.80, and 567.10 mg/g for methylene blue (MB) in Yellow River water, Yangtze River water, and tap water, respectively. And the beads embedded with 43% RE could efficiently adsorb Pb(II) and MB with high capacities of 187.78 mg/g and 586.46 mg/g, respectively. This study provides a new route to design and develop a green, cost-effective, and efficient adsorbent for the decontamination of wastewater.

show abstract

Section: Adsorption Experimentsmentioning

confidence: 99%