以镉铅砷复合污染土壤为研究对象,将生物可降解络合剂谷氨酸二乙酸四钠[tetrasodium N, N-bis(carboxymethyl)glutamic acid, GLDA]应用于电动治理技术,同时结合投加方式和阴极pH值控制技术,以研究电动治理对土壤中不同重金属的同步去...以镉铅砷复合污染土壤为研究对象,将生物可降解络合剂谷氨酸二乙酸四钠[tetrasodium N, N-bis(carboxymethyl)glutamic acid, GLDA]应用于电动治理技术,同时结合投加方式和阴极pH值控制技术,以研究电动治理对土壤中不同重金属的同步去除效率并探讨其去除机制。结果显示:(1)GLDA明显提高了土壤溶液中重金属的质量浓度,有利于土壤重金属在电场作用下移出土体;(2)阳极投加GLDA有利于As的去除,土壤As总去除率可达60.7%,但土壤环境过碱时不利于Cd和Pb的移除;(3)阴极投加GLDA结合pH值控制处理中Cd和Pb的总去除率分别可达35.9%和23.7%,在所有处理中最高,且As的去除率(42.3%)也仅低于阳极投加GLDA处理,是一种较优的同步去除Cd、Pb和As的方法;(4)电动处理后土壤pH值和电导率依处理不同会发生较大变化,总体趋势为阳极附近土壤pH值低于阴极附近,且土壤电导率普遍升高。研究结果为GLDA在重金属复合污染土壤电动治理中的应用提供了理论基础和技术支持。展开更多
The nonlinear refraction of tetrasodium salt of copper tetrasulfophthalocyanine in water was investigated by using Z-scan technique at 532 nm with different input energy and different pulse width. We reported the comp...The nonlinear refraction of tetrasodium salt of copper tetrasulfophthalocyanine in water was investigated by using Z-scan technique at 532 nm with different input energy and different pulse width. We reported the competition between the excited-state refraction and excited-state-thermal-induced refraction. The sign change of nonlinear refraction induced by thermal effect was observed and analyzed. In addition, we found that the excited-state refraction cannot counteract with excited-state-thermal-induced refraction due to different physical mechanism.展开更多
The result of UV-Vis adsorbance indicates that phthalocyanine copper cation and anion monolayers are alternately deposited, and dimmer is the major form. Through analyzing the 20th phthalocyanine MD film AFM image, we...The result of UV-Vis adsorbance indicates that phthalocyanine copper cation and anion monolayers are alternately deposited, and dimmer is the major form. Through analyzing the 20th phthalocyanine MD film AFM image, we know that the surface of MD film is flat and compact. The physical-chemical properties of molecular end-group have influence on the MD films surface character notably. The contact angles of water on the odd and even layer MD films vary greatly complying with "odd-even" regularity, and the value increases slightly with the increment of MD film layers due to the decrease of van der Waals force reinforced by substrate through MD films.展开更多
In this paper,Calixarenes 5,11,17,23 tetrasulfonic acid, tetrasodium salt was synthesized by the reaction of calixarenes and H 2SO 4. The yield of the Calixarenes 5,11,17,23 tetrasulfonic sodiums was improved to 20%～...In this paper,Calixarenes 5,11,17,23 tetrasulfonic acid, tetrasodium salt was synthesized by the reaction of calixarenes and H 2SO 4. The yield of the Calixarenes 5,11,17,23 tetrasulfonic sodiums was improved to 20%～30% using the method that the reactant (filitrated H 2SO 4) was dissolved in a little amount of NaCl saturated solution and then the water was volatilized at room temperature.展开更多
The change of frictional force was studied with the increase of scan rate on different Si surface by atomic force microscopy.The results showed that frictional force had different effect with the increasement of scan ...The change of frictional force was studied with the increase of scan rate on different Si surface by atomic force microscopy.The results showed that frictional force had different effect with the increasement of scan rate on different surface.To Si surface and hydroxylate silicon surface,it became bigger.It first decreased and then increased on aminopropylsilanixed(APS)silicon surface,taking on conic section relation.It declined on monolayer copper phthalocyaninetetrasulfonic,tetrasodium salt(CuTsPc)molecular deposition film.In the process of scan,frictional heat greatly affected friction and may even change the shape of the film so that plastic flow arouse.展开更多
As a substitute for lithium ion batteries, Na chemistry for ion battery systems is promising materials for energy storage applications for the next generation. Herein, the structures, IR and UV-visible spectra of 2-am...As a substitute for lithium ion batteries, Na chemistry for ion battery systems is promising materials for energy storage applications for the next generation. Herein, the structures, IR and UV-visible spectra of 2-aminoterephthalic acid (H2ATA), disodium 2-aminoterephthalate (Na2ATA), trisodium 2-aminotere-phthalate (Na3ATA) and tetrasodium 2-aminoterephthalate (Na4ATA) have been studied using density functional theory (DFT/B3LYP/6-311++G(d,p)). The theoretical geometric parameters and FTIR results showed very good agreement with the experimental results. Different conformers of Na2ATA, Na3ATA and Na4ATA showed that the binding energy per sodium in Na2ATA, Na3ATA and Na4ATA is -694.94, -543.44 and -407.46 kJ/mol, respectively. The Na3ATA and Na4ATA salts are higher in energy (151.46 and 287.48 kJ/mol, respectively) than Na2ATA, indicating the higher stability of the Na2ATA complex. The calculated binding energy, enthalpy and Gibbs free energy of Na2ATA, Na3ATA and Na4ATA revealed that the compounds are thermodynamically stable. Natural bond orbital (NBO) analysis of Na2ATA, Na3ATA and Na4ATA indicated that the major interaction occurs between the lone pair electrons of the oxygen atom and anti-bonding orbitals of carbon atoms of the two carboxylate ions. UV-visible spectrum of the free H2ATA and its sodium salts Na2ATA, Na3ATA and Na4ATA were performed using the time-dependent density functional theory (TD-DFT) method at the level of B3LYP/6-311++G(d,p). The frontier molecular orbital energetic parameters and global reactivity descriptors revealed that the Na4ATA and Na3ATA complexes exhibited a higher band gap (ΔEgap) and electronegativity (χeV) than Na2ATA.展开更多
文摘以镉铅砷复合污染土壤为研究对象,将生物可降解络合剂谷氨酸二乙酸四钠[tetrasodium N, N-bis(carboxymethyl)glutamic acid, GLDA]应用于电动治理技术,同时结合投加方式和阴极pH值控制技术,以研究电动治理对土壤中不同重金属的同步去除效率并探讨其去除机制。结果显示:(1)GLDA明显提高了土壤溶液中重金属的质量浓度,有利于土壤重金属在电场作用下移出土体;(2)阳极投加GLDA有利于As的去除,土壤As总去除率可达60.7%,但土壤环境过碱时不利于Cd和Pb的移除;(3)阴极投加GLDA结合pH值控制处理中Cd和Pb的总去除率分别可达35.9%和23.7%,在所有处理中最高,且As的去除率(42.3%)也仅低于阳极投加GLDA处理,是一种较优的同步去除Cd、Pb和As的方法;(4)电动处理后土壤pH值和电导率依处理不同会发生较大变化,总体趋势为阳极附近土壤pH值低于阴极附近,且土壤电导率普遍升高。研究结果为GLDA在重金属复合污染土壤电动治理中的应用提供了理论基础和技术支持。
基金This work is supported by the National Natural Sci- ence Foundation of China （Nos. 21203058, 51002046, 61275117 and 61307054）, the Natural Science Founda- tion of Heilongjiang Province of China （No. B201308）, the Foundation of Educational Commission of Hei- longjiang Province of China （Nos. 12521399 and 12531579）, the Natural Science Foundation for the Re- turned Overseas Scholars of Heilongjiang Province （No. LC2012C02）, and the Innovative Talents Program of Heilongjiang University of Science and Technology （No. Q20130202）.
文摘The nonlinear refraction of tetrasodium salt of copper tetrasulfophthalocyanine in water was investigated by using Z-scan technique at 532 nm with different input energy and different pulse width. We reported the competition between the excited-state refraction and excited-state-thermal-induced refraction. The sign change of nonlinear refraction induced by thermal effect was observed and analyzed. In addition, we found that the excited-state refraction cannot counteract with excited-state-thermal-induced refraction due to different physical mechanism.
基金Project(2021YFC2902400)supported by the National Key R&D Project of ChinaProjects(51974064,52174239)supported by the General Program of the National Natural Science Foundation of China。
文摘The result of UV-Vis adsorbance indicates that phthalocyanine copper cation and anion monolayers are alternately deposited, and dimmer is the major form. Through analyzing the 20th phthalocyanine MD film AFM image, we know that the surface of MD film is flat and compact. The physical-chemical properties of molecular end-group have influence on the MD films surface character notably. The contact angles of water on the odd and even layer MD films vary greatly complying with "odd-even" regularity, and the value increases slightly with the increment of MD film layers due to the decrease of van der Waals force reinforced by substrate through MD films.
文摘In this paper,Calixarenes 5,11,17,23 tetrasulfonic acid, tetrasodium salt was synthesized by the reaction of calixarenes and H 2SO 4. The yield of the Calixarenes 5,11,17,23 tetrasulfonic sodiums was improved to 20%～30% using the method that the reactant (filitrated H 2SO 4) was dissolved in a little amount of NaCl saturated solution and then the water was volatilized at room temperature.
文摘The change of frictional force was studied with the increase of scan rate on different Si surface by atomic force microscopy.The results showed that frictional force had different effect with the increasement of scan rate on different surface.To Si surface and hydroxylate silicon surface,it became bigger.It first decreased and then increased on aminopropylsilanixed(APS)silicon surface,taking on conic section relation.It declined on monolayer copper phthalocyaninetetrasulfonic,tetrasodium salt(CuTsPc)molecular deposition film.In the process of scan,frictional heat greatly affected friction and may even change the shape of the film so that plastic flow arouse.
文摘As a substitute for lithium ion batteries, Na chemistry for ion battery systems is promising materials for energy storage applications for the next generation. Herein, the structures, IR and UV-visible spectra of 2-aminoterephthalic acid (H2ATA), disodium 2-aminoterephthalate (Na2ATA), trisodium 2-aminotere-phthalate (Na3ATA) and tetrasodium 2-aminoterephthalate (Na4ATA) have been studied using density functional theory (DFT/B3LYP/6-311++G(d,p)). The theoretical geometric parameters and FTIR results showed very good agreement with the experimental results. Different conformers of Na2ATA, Na3ATA and Na4ATA showed that the binding energy per sodium in Na2ATA, Na3ATA and Na4ATA is -694.94, -543.44 and -407.46 kJ/mol, respectively. The Na3ATA and Na4ATA salts are higher in energy (151.46 and 287.48 kJ/mol, respectively) than Na2ATA, indicating the higher stability of the Na2ATA complex. The calculated binding energy, enthalpy and Gibbs free energy of Na2ATA, Na3ATA and Na4ATA revealed that the compounds are thermodynamically stable. Natural bond orbital (NBO) analysis of Na2ATA, Na3ATA and Na4ATA indicated that the major interaction occurs between the lone pair electrons of the oxygen atom and anti-bonding orbitals of carbon atoms of the two carboxylate ions. UV-visible spectrum of the free H2ATA and its sodium salts Na2ATA, Na3ATA and Na4ATA were performed using the time-dependent density functional theory (TD-DFT) method at the level of B3LYP/6-311++G(d,p). The frontier molecular orbital energetic parameters and global reactivity descriptors revealed that the Na4ATA and Na3ATA complexes exhibited a higher band gap (ΔEgap) and electronegativity (χeV) than Na2ATA.
