ABSTRACT
Municipal solid waste incineration fly ash (MSWIFA) contains potential contaminants and needs to be efficiently solidified/stablized and so should be managed properly. To achieve this goal, alkali-activated MSWIFA and phosphorus slag (PS) based geopolymer solidified bodies were investigated. Therefore, the mechanical properties of the solidified body, heavy metal leaching characteristics, heavy metal chemical forms, and heavy metal solidification/stabilization mechanisms were also analyzed. The results show that: The addition of an appropriate amount of PS can promote the strength development of a solidified body. When the mass ratio of MSWIFA to PS is 7:3, the strength of the solidified body reaches 22.8 MPa at 90d curing age, which is 5.3 times higher than that of the unmodified material. The MSWIFA/PS immobilized Zn 99.9 %, Pb 99.4 % and Cd 99.8 % in 60 day leaching tests. Meanwhile, PS can significantly increase the proportion of chemically stabilized forms of heavy metals in the solidified body. PS affects on the hydration process of the solidified body. When the mass fraction of PS doping was 30 %, the main hydration products of the solidified body were calcium silicate hydrate (C-S-H) and calcium alumina (AFt). When the mass fraction of PS is 50 %, the main hydration products are calcium aluminosilicate hydrate (C-A-S-H), sodium aluminosilicate hydrate (N-A-S-H), and AFt. These hydration products have good solidification effects on heavy metals. Therefore, it can be concluded that the MSWIFA/PS solidified body is an environmentally friendly and efficient binder.
Subject(s)
Metals, Heavy , Refuse Disposal , Coal Ash/chemistry , Solid Waste/analysis , Incineration , Metals, Heavy/analysis , Physical Phenomena , Carbon/chemistry , Particulate Matter/chemistry , Refuse Disposal/methodsABSTRACT
Objective@#To investigate the status of frailty in elderly inpatients with type 2 diabetes and its influencing factors.@*Methods@#Collected 126 cases hospitalized elderly patients with type 2 diabetes (from September 2017 to August 2018) general information, glycosylated hemoglobin A1C (HbA1C), comorbidity, nutritional assessment, Mini-Mental State Examination (MMSE), the frailty scale, multiariable Logistic regression was used for the analysis of frailty influence factors.@*Results@#38.1% (48/126) of elderly in patients with diabetes had no frailty, 25.4% (32/126) of patients with pre-frailty, and 36.5% (46/126) of patients with frailty. Logistic regression analysis showed that poor nutritional status, cognitive impairment and lower scores of instrumental daily living ability were the main risk factors for frailty in elderly diabetes.@*Conclusion@#Among elderly in patients with diabetes, the incidence of frailty is high, suggesting that clinical medical staff should identify frailty patients as early as possible, strengthen the integrated management of elderly in patients with diabetes through the multidisciplinary cooperation model, provide individualized guidance, reduce and delay the occurrence of frailty in elderly patients with diabetes.
ABSTRACT
Objective To investigate the status of frailty in elderly inpatients with type 2 diabetes and its influencing factors. Methods Collected 126 cases hospitalized elderly patients with type 2 diabetes (from September 2017 to August 2018) general information, glycosylated hemoglobin A1C (HbA1C), comorbidity, nutritional assessment,Mini-Mental State Examination (MMSE), the frailty scale , multiariable Logistic regression was used for the analysis of frailty influence factors. Results 38.1% (48/126) of elderly in patients with diabetes had no frailty, 25.4% (32/126) of patients with pre-frailty, and 36.5% (46/126) of patients with frailty. Logistic regression analysis showed that poor nutritional status, cognitive impairment and lower scores of instrumental daily living ability were the main risk factors for frailty in elderly diabetes. Conclusion Among elderly in patients with diabetes, the incidence of frailty is high, suggesting that clinical medical staff should identify frailty patients as early as possible, strengthen the integrated management of elderly in patients with diabetes through the multidisciplinary cooperation model, provide individualized guidance, reduce and delay the occurrence of frailty in elderly patients with diabetes.
