Storing reclaimed water in lakes is a widely used method of accommodating changes in the consumption of reclaimed water during wastewater reclamation and reuse. Solar light serves as an important function in degrading...Storing reclaimed water in lakes is a widely used method of accommodating changes in the consumption of reclaimed water during wastewater reclamation and reuse. Solar light serves as an important function in degrading pollutants during storage, and its effect on dissolved organic matter（DOM） was investigated in this study. Solar light significantly decreased the UV_（254） absorbance and fluorescence（FLU） intensity of reclaimed water.However, its effect on the dissolved organic carbon（DOC） value of reclaimed water was very limited. The decrease in the UV_（254） absorbance intensity and FLU excitation–emission matrix regional integration volume（FLU volume） of reclaimed water during solar light irradiation was fit with pseudo-first order reaction kinetics. The decrease of UV_（254） absorbance was much slower than that of the FLU volume. Ultraviolet light in solar light had a key role in decreasing the UV_（254） absorbance and FLU intensity during solar light irradiation. The light fluence-based removal kinetic constants of the UV_（254） and FLU intensity were independent of light intensity. The peaks of the UV_（254） absorbance and FLU intensity with an apparent molecular weight（AMW） of 100 Da to 2000 Da decreased after solar irradiation, whereas the DOC value of the major peaks did not significantly change.展开更多
The interaction of Hg^2＋ with polyphenyl quinoxaline ligand 2,3,6,7,10,11-hexaphenyldipyrazino[2,3-f：2＇,3＇-h]quinoxaline（HPQ） was investigated, and a new complex（C（49）H（32）N6Br2Cl2Hg） has been synthesized ...The interaction of Hg^2＋ with polyphenyl quinoxaline ligand 2,3,6,7,10,11-hexaphenyldipyrazino[2,3-f：2＇,3＇-h]quinoxaline（HPQ） was investigated, and a new complex（C（49）H（32）N6Br2Cl2Hg） has been synthesized and characterized. It exhibits a 0D single-core structure,and adopts triclinic P 1 space group with a = 11.139（2）, b = 13.429（3）, c = 14.488（3）A, α =76.10（3）, β = 83.16（3）, γ = 87.36（3）o, V = 2088.4（7） A^3, Z = 2, S = 1.056, F（000） = 1104, R = 0.0417 and w R = 0.0931（I 〉 2σ（I））. Furthermore, the behavior of HPQ with Hg^2＋ in the solution was also investigated, and the result shows that HPQ was found to have excellent fluorescent selectivity for Hg^2＋ over many other metal ions（Li^＋, K^＋, Na^＋, Sr^＋, Ca^2＋, Mg^2＋, Mn^2＋, Fe^3＋, Ni^2＋, Co^2＋, Cu^2＋, Zn^2＋,Cd^2＋, Pb^2＋, Al^3＋ and Cr^3＋） based on the intermolecular charge-transfer mechanism, which makes HPQ a potential fluorescence sensor or probe for Hg^2＋.展开更多
基金funded by the National Science Fund of China (Nos. 51138006, 51290284)the National High-Tech R&D Program (863) of China (No. 2013AA065205)+1 种基金the Key Science and Technology Project of Shenzhen Water AuthorityThe Collaborative Innovation Center for Regional Environmental Quality also supported this research
文摘Storing reclaimed water in lakes is a widely used method of accommodating changes in the consumption of reclaimed water during wastewater reclamation and reuse. Solar light serves as an important function in degrading pollutants during storage, and its effect on dissolved organic matter（DOM） was investigated in this study. Solar light significantly decreased the UV_（254） absorbance and fluorescence（FLU） intensity of reclaimed water.However, its effect on the dissolved organic carbon（DOC） value of reclaimed water was very limited. The decrease in the UV_（254） absorbance intensity and FLU excitation–emission matrix regional integration volume（FLU volume） of reclaimed water during solar light irradiation was fit with pseudo-first order reaction kinetics. The decrease of UV_（254） absorbance was much slower than that of the FLU volume. Ultraviolet light in solar light had a key role in decreasing the UV_（254） absorbance and FLU intensity during solar light irradiation. The light fluence-based removal kinetic constants of the UV_（254） and FLU intensity were independent of light intensity. The peaks of the UV_（254） absorbance and FLU intensity with an apparent molecular weight（AMW） of 100 Da to 2000 Da decreased after solar irradiation, whereas the DOC value of the major peaks did not significantly change.
基金supported by the NSFC(21301100)the Education Department Fund of Henan(13A150819)Special Fund of Nanyang Normal University(ZX2013029)
文摘The interaction of Hg^2＋ with polyphenyl quinoxaline ligand 2,3,6,7,10,11-hexaphenyldipyrazino[2,3-f：2＇,3＇-h]quinoxaline（HPQ） was investigated, and a new complex（C（49）H（32）N6Br2Cl2Hg） has been synthesized and characterized. It exhibits a 0D single-core structure,and adopts triclinic P 1 space group with a = 11.139（2）, b = 13.429（3）, c = 14.488（3）A, α =76.10（3）, β = 83.16（3）, γ = 87.36（3）o, V = 2088.4（7） A^3, Z = 2, S = 1.056, F（000） = 1104, R = 0.0417 and w R = 0.0931（I 〉 2σ（I））. Furthermore, the behavior of HPQ with Hg^2＋ in the solution was also investigated, and the result shows that HPQ was found to have excellent fluorescent selectivity for Hg^2＋ over many other metal ions（Li^＋, K^＋, Na^＋, Sr^＋, Ca^2＋, Mg^2＋, Mn^2＋, Fe^3＋, Ni^2＋, Co^2＋, Cu^2＋, Zn^2＋,Cd^2＋, Pb^2＋, Al^3＋ and Cr^3＋） based on the intermolecular charge-transfer mechanism, which makes HPQ a potential fluorescence sensor or probe for Hg^2＋.
