http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Guoxin Xue (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Copper biosorption by Myriophyllum spicatum: Effects of temperature and pH
Changzhou Yan,Guoxin Li,Peiying Xue,Qingzhao Li 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.4
Using submerged aquatic plants is a cheap and clean technique to remediate heavy metal water pollution at low concentrations. Biosorption of Cu(II) ions by fresh tissues of Myriophyllum spicatum, a submerged aquatic plant,was characterized in an artificial solution system under different values of contact time, temperature and pH in this paper. Cu(II) biosorption was fast and equilibrium was attained within 20 min. The equilibrium biosorption data were analyzed using three widely applied isotherm models: Langmuir, Freundlich and Redlich-Peterson isotherm. Langmuir isotherm parameters obtained from the three Langmuir linear equations by using linear method were dissimilar, except when the non-linear method was used. Best fits were yielded with Langmuir and Redlich-Peterson isotherms (R2=0.961-0.992 and 0.990-0.998, respectively). The saturated monolayer biosorption capacity of M. spicatum for Cu(II) at 298 K was calculated to be 0.19 mmol/g. The biosorption capacity of M. spicatum for Cu(II) increased with increasing pH,and the resulting isotherms were well described by Langmuir and extended Langmuir models (R2=0.931-0.993 and 0.961, respectively). The comparison of calculated qe and experimental qe values showed that the extended Langmuir model had a better simulation for Cu(II) biosorption by M. spicatum than the Langmuir isotherm model. FT-IR was used to characterize the interaction between M. spicatum and Cu(II), with the results indicating that carboxyl groups played an important role in Cu(II) binding.
-
Chao Sheng,Yiming Zhou,Xinyu Zhang,Guoxin Xue 한국섬유공학회 2018 Fibers and polymers Vol.19 No.10
Cross-linked hydrogels of chitosan/poly(vinyl alcohol) (PVA)/oxidized cellulose nanowhiskers (CNWs) were prepared by using oxidized CNWs as a cross-linker. The effects of the oxidation level of CNWs on the swelling behavior, thermal stability, viscoelastic properties and compressive strength of the hydrogels were studied. Chemical cross-links, hydrogen bonds, as well as nanofiller reinforcement between the three materials played a major role in determining the properties of the hydrogels. Swelling test results showed that the incorporation of oxidized CNWs decreased the water absorbability of the hydrogels due to the increase in cross-linking degree. Viscoelastic properties of the hydrogels with oxidized CNWs was increased by 537 % in storage modulus, from 4.65 kPa to 29.6 kPa. Compressive strength of 181.5 kPa at 50 % strain was observed from the cross-linked hydrogels, compared with 21.2 kPa of the non-cross-linked hydrogels. The thermal experiments showed that the chemical cross-linking slightly increase the resistance toward thermal degradation of the hydrogels.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
