A new PGA-seaweed water-retaining agent and its use in saline-alkali soils repairing

Zhu, Youdong; Ni, Haifeng; Cao, Jun; Li, Kunlun; Yue, Qiulin; Zhao, Lin

doi:10.1063/1.5110809

Cited by 5 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some studies have suggested, however, that metal cations tend to complex with hydroxyl and carboxyl groups within the hydrogel reducing its swelling capacity (Adjuik et al, 2022;Isik & Kis, 2004). New types of SAP (e.g., sodium acrylate, coacrylamide, potassium methacrylate and sodium polyacrylate), with improved salt resistance, have been tested generating good application results (Zhao et al, 2019;Zhu et al, 2019) showing also higher tolerance to salinity, including sodiumacrylate coacrylamide, potassium methacrylate and sodium polyacrylate (Ma et al, 2004;Mohana Raju et al, 2002). SAP improves soil structure, enhances soil permeability, and plays a salt filtering role in the soil with its strong water absorption ability to limit the excessive accumulation of toxic ions in plant organs (Jamil & Ahmed, 2008;Shi et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Super absorbent polymer (SAP) on water‐salt transport in saline alkali soil: Effects of dosage, height and thickness

Shu,

Yu,

Yin

et al. 2024

European J Soil Science

View full text Add to dashboard Cite

Soil salinisation is a pervasive form of land degradation posing a significant threat to the global environment. Saline soil, covering roughly 10% of the total land area, represents a crucial reserve of land resources. The use of super absorbent polymer (SAP) impacts capillary water movement through the soil because of its exceptional water absorption and retention capabilities. SAP is expected to influence the intricate water‐salt migration processes and their redistribution within soil. This study employed soil column experiments to investigate the impacts of varying SAP dosages (A), heights (B) and thicknesses (C) on soil water and salt transport in the Tianjin Binhai New Area, China. The main findings showed that: (1) average capillary water rise rate decreased with SAP dosage increase. The groundwater recharge trend in time was like that of capillary water rise height; (2) SAP usage increased water and salt content on the application layer and reduced surface soil salt accumulation; (3) the best SAP combination for application was 1.1% SAP at 17–18 cm from the groundwater level. This study provides basic effective SAP application strategies for preventing soil salinisation.

show abstract

Section: Discussionmentioning

confidence: 99%

Super absorbent polymer (SAP) on water‐salt transport in saline alkali soil: Effects of dosage, height and thickness

Shu,

Yu,

Yin

et al. 2024

European J Soil Science

View full text Add to dashboard Cite

show abstract

“…Seaweed fertilizers can balance plant endogenous hormones and enhance their growth. In addition, as an environmentally friendly natural fertilizer, it contributes to the mitigation of soil structure and water body destruction, as well as anthropogenic disturbances of nutrient flows 112,113 …”

Section: Further Processing In Terms Of Marine Seaweeds Applicationsmentioning

confidence: 99%

Novel postharvest processing strategies for value‐added applications of marine algae

et al. 2021

View full text Add to dashboard Cite

Marine algae are regarded as a promising nutrients resource in future as they can be sustainably cultured without land and high investment. These macroalgae are now widely processed into food and beverages, fertilizers and animal feed. Furthermore, bioactive compounds such as polysaccharides and polyphenols in seaweeds have proven to have antibacterial, antiviral and antifungal properties that can be utilized in cosmeceuticals, nutraceuticals and pharmaceuticals. As a key procedure in seaweed production, the postharvest process not only requires more laboured and energy but also affect the quality of the final product significantly. This article reviewed all current postharvest processes and technologies of seaweed and addressed potential postharvest strategies for seaweed production. © 2021 Society of Chemical Industry

show abstract

“…In the remediation of pollutants from waters and soils, PGA is mainly used as a flocculant [ 45 , 46 ] for the removal of heavy metals [ 47 , 48 , 49 , 50 ], or for dichlorination of chlorinated compounds in groundwater [ 51 ]. Research also shows its usefulness in repairing saline-alkali land [ 52 , 53 ]. In the literature, however, there is less research on the possibility of using PGA in the remediation of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon Degradation and Microbial Survival Improvement in Response to γ-Polyglutamic Acid Application

Zając

Fabiańska

Jedrszczyk

et al. 2022

IJERPH

View full text Add to dashboard Cite

To improve the environmental sustainability of cleanup activities of contaminated sites there is a need to develop technologies that minimize soil and habitat disturbances. Cleanup technologies, such as bioremediation, are based on biological products and processes, and they are important for the future of our planet. We studied the potential of γ-poly glutamic acid (PGA) as a natural component of biofilm produced by Bacillus sp. to be used for the decomposition of petroleum products, such as heavy naphtha (N), lubricating oil (O), and grease (G). The study aimed to assess the impact of the use of different concentrations of PGA on the degradation process of various fractions of petroleum hydrocarbons (PH) and its effect on bacterial population growth in harsh conditions of PH contamination. In laboratory conditions, four treatments of PGA with each of the petroleum products (N, O, and G) were tested: PGA0 (reference), PGA1 (1% PGA), PGA1B (1% PGA with Bacillus licheniformis), and PGA10 (10% PGA). After 7, 28, 56, and 112 days of the experiment, the percentage yield extraction, hydrocarbon mass loss, geochemical ratios, pH, electrical conductivity, and microorganisms survival were determined. We observed an increase in PH removal, reflected as a higher amount of extraction yield (growing with time and reaching about 11% in G) and loss of hydrocarbon mass (about 4% in O and G) in all treatments of the PGA compared to the reference. The positive degradation impact was intensive until around day 60. The PH removal stimulation by PGA was also reflected by changes in the values of geochemical ratios, which indicated that the highest rate of degradation was at the initial stage of the process. In general, for the stimulation of PH removal, using a lower (1%) concentration of PGA resulted in better performance than a higher concentration (10%). The PH removal facilitated by PGA is related to the anionic homopoliamid structure of the molecule and its action as a surfactant, which leads to the formation of micelles and the gradual release of PH absorbed in the zeolite carrier. Moreover, the protective properties of PGA against the extinction of bacteria under high concentrations of PH were identified. Generally, the γ-PGA biopolymer helps to degrade the hydrocarbon pollutants and stabilize the environment suitable for microbial degraders development.

show abstract

A new PGA-seaweed water-retaining agent and its use in saline-alkali soils repairing

Cited by 5 publications

References 8 publications

Super absorbent polymer (SAP) on water‐salt transport in saline alkali soil: Effects of dosage, height and thickness

Super absorbent polymer (SAP) on water‐salt transport in saline alkali soil: Effects of dosage, height and thickness

Novel postharvest processing strategies for value‐added applications of marine algae

Hydrocarbon Degradation and Microbial Survival Improvement in Response to γ-Polyglutamic Acid Application

Contact Info

Product

Resources

About