The Experts below are selected from a list of 1131 Experts worldwide ranked by ideXlab platform

Xiaoxiao Shi - One of the best experts on this subject based on the ideXlab platform.

  • Passivation of lead and cadmium and increase of the nutrient content during sewage sludge composting by Phosphate amendments.
    Environmental research, 2020
    Co-Authors: Guodi Zheng, Xiankai Wang, Tongbin Chen, Jun Yang, Junxing Yang, Junwan Liu, Xiaoxiao Shi
    Abstract:

    Abstract As an efficient and cost-effective biological treatment method for sewage sludge, composting has been widely used worldwide. To passivate heavy metals and enhance the nutrient content in compost, in the present study, Phosphate rock, calcium magnesium Phosphate, and Monopotassium Phosphate were added to the composting substrate. According to the Community Bureau of Reference sequential extraction procedure, Phosphate rock and Monopotassium Phosphate amendments exhibit a good passivation effect on Cd and Pb. The X-ray diffraction patterns proved the formation of Pb3(PO4)2 and Cd5(PO4)2SiO4 crystals, and X-ray absorption near-edge structure spectroscopy illustrated the change in P speciation after Phosphate amendment. Furthermore, Phosphate amendment increased the contents of total P and available P, and it reduced the loss of N during sewage sludge composting. The germination index showed that the target Phosphate amendments in sewage sludge compost had no negative effects on seed germination, and this method has great potential to be used as a soil amendment.

  • Effect of Phosphate amendments on improving the fertilizer efficiency and reducing the mobility of heavy metals during sewage sludge composting.
    Journal of environmental management, 2019
    Co-Authors: Xiankai Wang, Guodi Zheng, Tongbin Chen, Xiaoxiao Shi, Yuewei Wang, Erqi Nie, Junwan Liu
    Abstract:

    Abstract Composting has been globally applied as an effective and cost-efficient process to manage and reuse sewage sludge. In the present study, four different Phosphates as well as a mixture of ferrous sulfate and Monopotassium Phosphate were used in sewage sludge composting. The results showed that these Phosphate amendments promoted an increase in temperature and the degradation of organic matter as well as reduction on nitrogen loss during 18 days of composting. In addition, ferrous sulfate and Phosphate had a synergistic effect on reducing nitrogen loss. The contents of total phosphorus and available phosphorus in the compost with addition of 1% Phosphate were 40.9% and 66.1% higher than the compost with control treatment. Using the BCR (Community Bureau of Reference) sequential extraction procedure, the addition of calcium magnesium Phosphate significantly reduced the mobility factor of Cd, Zn and Cu by 24.2%, 1.7% and 18.8%, respectively. The mobility factors of Pb were increased in all samples, but the Monopotassium Phosphate treated sample exhibited the greatest Pb passivation ability with the lowest mobility factor increase (1.8%) among all treatments. The X-ray diffraction patterns of compost samples indicated that the passivation mechanism of Cu and Zn may be the forming CuFeS2 and ZnCu(P2O7) crystals during sewage sludge composting. The germination index showed that the compost of all treatments was safe for agricultural application; the germination index of the calcium magnesium Phosphate treatment was 99.9 ± 11.8%, which was the highest among all treatments.

Junwan Liu - One of the best experts on this subject based on the ideXlab platform.

  • Passivation of lead and cadmium and increase of the nutrient content during sewage sludge composting by Phosphate amendments.
    Environmental research, 2020
    Co-Authors: Guodi Zheng, Xiankai Wang, Tongbin Chen, Jun Yang, Junxing Yang, Junwan Liu, Xiaoxiao Shi
    Abstract:

    Abstract As an efficient and cost-effective biological treatment method for sewage sludge, composting has been widely used worldwide. To passivate heavy metals and enhance the nutrient content in compost, in the present study, Phosphate rock, calcium magnesium Phosphate, and Monopotassium Phosphate were added to the composting substrate. According to the Community Bureau of Reference sequential extraction procedure, Phosphate rock and Monopotassium Phosphate amendments exhibit a good passivation effect on Cd and Pb. The X-ray diffraction patterns proved the formation of Pb3(PO4)2 and Cd5(PO4)2SiO4 crystals, and X-ray absorption near-edge structure spectroscopy illustrated the change in P speciation after Phosphate amendment. Furthermore, Phosphate amendment increased the contents of total P and available P, and it reduced the loss of N during sewage sludge composting. The germination index showed that the target Phosphate amendments in sewage sludge compost had no negative effects on seed germination, and this method has great potential to be used as a soil amendment.

  • Effect of Phosphate amendments on improving the fertilizer efficiency and reducing the mobility of heavy metals during sewage sludge composting.
    Journal of environmental management, 2019
    Co-Authors: Xiankai Wang, Guodi Zheng, Tongbin Chen, Xiaoxiao Shi, Yuewei Wang, Erqi Nie, Junwan Liu
    Abstract:

    Abstract Composting has been globally applied as an effective and cost-efficient process to manage and reuse sewage sludge. In the present study, four different Phosphates as well as a mixture of ferrous sulfate and Monopotassium Phosphate were used in sewage sludge composting. The results showed that these Phosphate amendments promoted an increase in temperature and the degradation of organic matter as well as reduction on nitrogen loss during 18 days of composting. In addition, ferrous sulfate and Phosphate had a synergistic effect on reducing nitrogen loss. The contents of total phosphorus and available phosphorus in the compost with addition of 1% Phosphate were 40.9% and 66.1% higher than the compost with control treatment. Using the BCR (Community Bureau of Reference) sequential extraction procedure, the addition of calcium magnesium Phosphate significantly reduced the mobility factor of Cd, Zn and Cu by 24.2%, 1.7% and 18.8%, respectively. The mobility factors of Pb were increased in all samples, but the Monopotassium Phosphate treated sample exhibited the greatest Pb passivation ability with the lowest mobility factor increase (1.8%) among all treatments. The X-ray diffraction patterns of compost samples indicated that the passivation mechanism of Cu and Zn may be the forming CuFeS2 and ZnCu(P2O7) crystals during sewage sludge composting. The germination index showed that the compost of all treatments was safe for agricultural application; the germination index of the calcium magnesium Phosphate treatment was 99.9 ± 11.8%, which was the highest among all treatments.

Kangju Lee - One of the best experts on this subject based on the ideXlab platform.

  • Monopotassium Phosphate reinforced in situ forming injectable hyaluronic acid hydrogels for subcutaneous injection
    International Journal of Biological Macromolecules, 2020
    Co-Authors: Jihye Seo, Song Yi Lee, Sungyun Kim, Mingyu Yang, Da In Jeong, Chaerim Hwang, Minhwan Kim, Hanjun Kim, Junmin Lee, Kangju Lee
    Abstract:

    Monopotassium Phosphate and pH modulation-reinforced hydrogel based on hyaluronic acid (HA) grafted with dopamine (dopa) was fabricated as one of subcutaneous injection formulations of donepezil (DPZ). Both incorporation of KH2PO4 and pH adjustment finally attributed to tuning viscoelastic and biodegradable properties of hydrogel system. Appropriate gelation time for in situ gel formation, single syringe injectability, self-healing capability, and viscoelastic features were accomplished with the optimization of KH2PO4 concentration in hydrogel systems. DPZ base (as a poorly water soluble drug) was encapsulated in poly(lactic-co-glycolic acid) (PLGA) microsphere (MS) and it was further embedded in the hydrogel structure for sustained drug release. Biodegradability of designed KH2PO4-incorporated HA-dopa/DPZ MS hydrogel system was assessed by optical imaging and the remained gel weight of crosslinked HA-dopa hydrogel group was 3.4-fold higher than that of unmodified HA-dopa mixture group on day 14 (p < 0.05). Subcutaneous injection of KH2PO4-incorporated HA-dopa/DPZ MS hydrogel did not induce any severe systemic toxicities. All these data suggest that designed HA-dopa/DPZ MS hydrogel structure crosslinked by KH2PO4 incorporation and pH adjustment can be one of promising subcutaneous injection formulations for sustained drug delivery.

  • Monopotassium Phosphate-reinforced in situ forming injectable hyaluronic acid hydrogels for subcutaneous injection.
    International journal of biological macromolecules, 2020
    Co-Authors: Jihye Seo, Song Yi Lee, Sungyun Kim, Mingyu Yang, Chaerim Hwang, Minhwan Kim, Hanjun Kim, Junmin Lee, Da In Jeong, Kangju Lee
    Abstract:

    Monopotassium Phosphate and pH modulation-reinforced hydrogel based on hyaluronic acid (HA) grafted with dopamine (dopa) was fabricated as one of subcutaneous injection formulations of donepezil (DPZ). Both incorporation of KH2PO4 and pH adjustment finally attributed to tuning viscoelastic and biodegradable properties of hydrogel system. Appropriate gelation time for in situ gel formation, single syringe injectability, self-healing capability, and viscoelastic features were accomplished with the optimization of KH2PO4 concentration in hydrogel systems. DPZ base (as a poorly water soluble drug) was encapsulated in poly(lactic-co-glycolic acid) (PLGA) microsphere (MS) and it was further embedded in the hydrogel structure for sustained drug release. Biodegradability of designed KH2PO4-incorporated HA-dopa/DPZ MS hydrogel system was assessed by optical imaging and the remained gel weight of crosslinked HA-dopa hydrogel group was 3.4-fold higher than that of unmodified HA-dopa mixture group on day 14 (p 

Guodi Zheng - One of the best experts on this subject based on the ideXlab platform.

  • Passivation of lead and cadmium and increase of the nutrient content during sewage sludge composting by Phosphate amendments.
    Environmental research, 2020
    Co-Authors: Guodi Zheng, Xiankai Wang, Tongbin Chen, Jun Yang, Junxing Yang, Junwan Liu, Xiaoxiao Shi
    Abstract:

    Abstract As an efficient and cost-effective biological treatment method for sewage sludge, composting has been widely used worldwide. To passivate heavy metals and enhance the nutrient content in compost, in the present study, Phosphate rock, calcium magnesium Phosphate, and Monopotassium Phosphate were added to the composting substrate. According to the Community Bureau of Reference sequential extraction procedure, Phosphate rock and Monopotassium Phosphate amendments exhibit a good passivation effect on Cd and Pb. The X-ray diffraction patterns proved the formation of Pb3(PO4)2 and Cd5(PO4)2SiO4 crystals, and X-ray absorption near-edge structure spectroscopy illustrated the change in P speciation after Phosphate amendment. Furthermore, Phosphate amendment increased the contents of total P and available P, and it reduced the loss of N during sewage sludge composting. The germination index showed that the target Phosphate amendments in sewage sludge compost had no negative effects on seed germination, and this method has great potential to be used as a soil amendment.

  • Effect of Phosphate amendments on improving the fertilizer efficiency and reducing the mobility of heavy metals during sewage sludge composting.
    Journal of environmental management, 2019
    Co-Authors: Xiankai Wang, Guodi Zheng, Tongbin Chen, Xiaoxiao Shi, Yuewei Wang, Erqi Nie, Junwan Liu
    Abstract:

    Abstract Composting has been globally applied as an effective and cost-efficient process to manage and reuse sewage sludge. In the present study, four different Phosphates as well as a mixture of ferrous sulfate and Monopotassium Phosphate were used in sewage sludge composting. The results showed that these Phosphate amendments promoted an increase in temperature and the degradation of organic matter as well as reduction on nitrogen loss during 18 days of composting. In addition, ferrous sulfate and Phosphate had a synergistic effect on reducing nitrogen loss. The contents of total phosphorus and available phosphorus in the compost with addition of 1% Phosphate were 40.9% and 66.1% higher than the compost with control treatment. Using the BCR (Community Bureau of Reference) sequential extraction procedure, the addition of calcium magnesium Phosphate significantly reduced the mobility factor of Cd, Zn and Cu by 24.2%, 1.7% and 18.8%, respectively. The mobility factors of Pb were increased in all samples, but the Monopotassium Phosphate treated sample exhibited the greatest Pb passivation ability with the lowest mobility factor increase (1.8%) among all treatments. The X-ray diffraction patterns of compost samples indicated that the passivation mechanism of Cu and Zn may be the forming CuFeS2 and ZnCu(P2O7) crystals during sewage sludge composting. The germination index showed that the compost of all treatments was safe for agricultural application; the germination index of the calcium magnesium Phosphate treatment was 99.9 ± 11.8%, which was the highest among all treatments.

Xiankai Wang - One of the best experts on this subject based on the ideXlab platform.

  • Passivation of lead and cadmium and increase of the nutrient content during sewage sludge composting by Phosphate amendments.
    Environmental research, 2020
    Co-Authors: Guodi Zheng, Xiankai Wang, Tongbin Chen, Jun Yang, Junxing Yang, Junwan Liu, Xiaoxiao Shi
    Abstract:

    Abstract As an efficient and cost-effective biological treatment method for sewage sludge, composting has been widely used worldwide. To passivate heavy metals and enhance the nutrient content in compost, in the present study, Phosphate rock, calcium magnesium Phosphate, and Monopotassium Phosphate were added to the composting substrate. According to the Community Bureau of Reference sequential extraction procedure, Phosphate rock and Monopotassium Phosphate amendments exhibit a good passivation effect on Cd and Pb. The X-ray diffraction patterns proved the formation of Pb3(PO4)2 and Cd5(PO4)2SiO4 crystals, and X-ray absorption near-edge structure spectroscopy illustrated the change in P speciation after Phosphate amendment. Furthermore, Phosphate amendment increased the contents of total P and available P, and it reduced the loss of N during sewage sludge composting. The germination index showed that the target Phosphate amendments in sewage sludge compost had no negative effects on seed germination, and this method has great potential to be used as a soil amendment.

  • Effect of Phosphate amendments on improving the fertilizer efficiency and reducing the mobility of heavy metals during sewage sludge composting.
    Journal of environmental management, 2019
    Co-Authors: Xiankai Wang, Guodi Zheng, Tongbin Chen, Xiaoxiao Shi, Yuewei Wang, Erqi Nie, Junwan Liu
    Abstract:

    Abstract Composting has been globally applied as an effective and cost-efficient process to manage and reuse sewage sludge. In the present study, four different Phosphates as well as a mixture of ferrous sulfate and Monopotassium Phosphate were used in sewage sludge composting. The results showed that these Phosphate amendments promoted an increase in temperature and the degradation of organic matter as well as reduction on nitrogen loss during 18 days of composting. In addition, ferrous sulfate and Phosphate had a synergistic effect on reducing nitrogen loss. The contents of total phosphorus and available phosphorus in the compost with addition of 1% Phosphate were 40.9% and 66.1% higher than the compost with control treatment. Using the BCR (Community Bureau of Reference) sequential extraction procedure, the addition of calcium magnesium Phosphate significantly reduced the mobility factor of Cd, Zn and Cu by 24.2%, 1.7% and 18.8%, respectively. The mobility factors of Pb were increased in all samples, but the Monopotassium Phosphate treated sample exhibited the greatest Pb passivation ability with the lowest mobility factor increase (1.8%) among all treatments. The X-ray diffraction patterns of compost samples indicated that the passivation mechanism of Cu and Zn may be the forming CuFeS2 and ZnCu(P2O7) crystals during sewage sludge composting. The germination index showed that the compost of all treatments was safe for agricultural application; the germination index of the calcium magnesium Phosphate treatment was 99.9 ± 11.8%, which was the highest among all treatments.