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The results revealed that iron-bound P and aluminum-bound P were significantly linked to adsorbed Fe, carbonate-bound Fe, low-activity silicate-bound Fe, and Fe's total contents, indicating that the geochemical cycling of these P fractions and sediments is likely closely related and active in the soils and sediments. The contents of active P, including loosely sorbed P, Al-P, and Fe-P, in the reservoir's sediments were significantly higher than those in the upstream soils and sediments. The contents of highly active Fe fractions, which contained easily reducible Fe oxide, reducible Fe oxide, Fecarb, and other Fe fractions in the reservoir's sediments were significantly higher than those in the soil or sediment samples from upstream.
Source link: https://doi.org/10.3389/fenvs.2022.998046
The findings revealed that the N and P concentrations in the four plantations were in order of R. pseudoacacia > A. P. tabuliformis' concentrations were higher in comparison to leaves. The concentrations of N and P, as well as N:P for R. pseudoacacia plantation, were noticeably higher than those for other plantations. The highest C and N concentrations in surface soil were the highest in surface soil, with C:N and C:P showing the trend of litter > soil in the plantations, with the exception of S. matsudana. Leaf total N content in the four plantations was positively related to that of litter. P. pseudoacacia, P. tabuliformis, and S. matsudana were mainly limited by P, while A. altissima's growth was largely restricted by N, according to our results, although A. altissima's growth was also restricted by N.
Source link: https://doi.org/10.46488/NEPT.2022.v21i03.049
The movement of phosphorus at the interface between river sediments and water is influenced by artificial disturbances. We found the presence of various forms of P, diffusion flux at the interface, as well as P adsorption parameters in our experiments. The results revealed that four P species were present in the sediments in the same order: Ca-P > Fe-P > Alkali extracted phosphorus. The -P content in the interstitial water of sediments was closely correlated with that in the overlying water. These results showed that the risk of phosphorus release from downstream sediments was higher than that from upstream sediments. HIGHLIGHTS: Human disturbances' effect on phosphorus transport and diffusion at the river sediment-u2013water interface. P diffusion flux at the wateru2013sediment interface; P diffusion flux at the wateru2013sediment interface; ; Thermodynamic characteristics of phosphorus diffusion at the water sediment interface;.
Source link: https://doi.org/10.2166/ws.2022.277
Rockfos is a product that can be used in filter calcination of carbonate-silica rock at a temperature of 900 00b0C, and the aim of this research was to determine the effectiveness of filters filled with Rockfos for removal of phosphorus from domestic wastewater use. The test filters removed Total-P from test samples with an average of 31. 5 percent and 30. 2%, according to the test filters, which could be used to successfully remove P from domestic wastewater in small wastewater treatment plants.
Source link: https://doi.org/10.12913/22998624/152527
Plants in soils are dependent on root systems for nutrient uptake. In a recombinant inbred line population, obtained from Brassica napus L. Zhongshuang11 and 4D122 with significant differences in root characteristics and nutritional effectiveness, 12 root and biomass traits were tested at the seedling stage under low nitrogen, low phosphorus, and low potassium conditions, respectively. Moreover, 264 genes within the four major QTL clusters had high expressions of root and SNP/InDel variations between two parents, including two NPK-common and two specific QTL clusters, indicating their vital role in cooperative nutrients uptake of N, P, and K. These key loci and candidate genes lay the basis for further investigation into the NPK starvation response mechanisms in B. napus.
Source link: https://doi.org/10.3389/fpls.2022.994666
The control group was fed a corn-soybean-based diet; the BA treatment group was fed the basal diet containing the antibiotics auromycin, flavomycin, and kitasamycin; and AGP's treatment group was given the AGPs treatment group's fed the antibiotic-rich basal diet with the antibiotics auromycin, flavomycin and kitasamycin. P in excreta's content decreased sharply on days 21, 42 and 42, respectively. The mRNA of P transport related genes PiT-1,2 in the duodenum and jejunum was significantly higher in BA, and P transport-related genes PiT-1,2 in the BA group was more tightly controlled than in the CON group. These results show that dietary supplementation of BA CGMCC18320 enhances broiler growth and bone health in comparison to supplementation with AGPs, through increased intestinal P transporters, microbial modulation, and increased P retention.
Source link: https://doi.org/10.1016/j.psj.2022.102126
In recent years, biochar and its magnetized variants for wastewater treatment have sparked significant research interest. Despite, there have been no studies into the use of paper waste sludge obtained from the recycling industry as a feedstock for biochar treatment in wastewater treatment. Hence, this review concentrated on the manufacture of magnetic biochar composites as an adsorbent for nutrient removal and recovery from wastewater. The feedstock was synthesized using Fe3+ and Fe2+ salts, and the magnetized version was produced using paper waste sludge and its magnetized version at 450 °u00b0C and the magnetized version was produced using paper waste sludge during co-pyrolysis at 450 u00b0C. These outstanding findings position paper waste sludge-derived biochar as a cost-effective and low-cost adsorbent for the removal and recovery of nutrients from wastewater with the added benefit of being part of the recycling process.
Source link: https://doi.org/10.1016/j.clce.2022.100048
The leaves' nutritional status provides a greater insight into the nutritional status of oil palm plants, making it a tool for determining nutritional deficiencies and aiding in fertilizer selection. In the Eastern Amazon's edaphoclimatic conditions, the current study was to determine leaf concentrations of N, P, K, Ca, Mg, and S in the oil palm under fertilization with phosphate, potassium, and magnesium. However, leaf concentrations of N, P, K, and S in adult oil palm plants were also different between phosphorus sources aphid. Only increased the leaf concentrations of K and Mg, respectively, as potassium and magnesium fertilization were only increased. In oil palm plants grown in the Eastern Amazon, Fertilization with P, Ca, Mg, and Mg ensures appropriate leaf content in the oil palm plants grown in the Eastern Amazon.
Source link: https://doi.org/10.14393/BJ-v38n0a2022-61399
Nitrogen pollution in the oligotrophic Chaihe Reservoir has caused the reconsideration of whether nitrogen control is necessary. Does this mean that eutrophication control can lead to the development of u201ccleaner lakes that are dirtier lakes? u201d The Chaihe Reservoir is a typical example of a water body with high nitrogen and low algal populations. Using the filtering trajectory method, the relationship between the chlorophyll a and nutrients in the reservoir was investigated. Due to the Chaihe Reservoir's nitrogen pollution, it is advised to remove nitrogen at the end of a drinking water supply system.
Source link: https://doi.org/10.3390/w14172629
The concentration of NH 4 -N in the wastewater was reduced by 5 times after placing all selected materials in the first filtration column, the number of NO3-N was reduced by 6 times, and the amount of PO 4 -P decreased by 5 times. The tested materials effectively treat wastewater of nitrogen or phosphorus, and do not pollute the water with environmentally harmful chemicals, so they can be used in the design of tertiary wastewater treatment filters.
Source link: https://doi.org/10.3390/su141710713
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