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| 1 | Mechanism of lead immobilization by oxalic acid-activated phosphate rocks显示文摘Lead (Pb) chemical fixation is an important environmental aspect for human health. Phosphate rocks (PRs) were utilized as an adsorbent to remove Pb from aqueous solution. Raw PRs and oxalic acid-activated PRs (APRs) were used to investigate the effect of chemical modification on the Pb-binding capacity in the pH range 2.0-5.0. The Pb adsorption rate of all treatments above pH 3.0 reached 90%. The Pb binding on PRs and APRs was pH-independent, except at pH 2.0 in activated treatments. The X-ray diffraction analysis confirmed that the raw PRs formed cerussite after reacting with the Pb solution, whereas the APRs formed pyromorphite. The Fourier Transform Infrared spectroscopy analysis indicated that carbonate (CO32-) in raw PRs and phosphate (PO43-) groups in APRs played an important role in the Pb-binding process. After adsorption, anomalous block-shaped particles were observed by scanning electron microscopy with energy dispersive spectroscopy. The X-ray photoelectron spectroscopy data further indicated that both chemical and physical reactions occurred during the adsorption process according to the binding energy. Because of lower solubility of pyromorphite compared to cerussite, the APRs are more effective in immobilizing Pb than that of PRs. | Guanjie Jiang Yonghong Liu Li Huang Qingling Fu Youjun Deng Hongqing Hu | 2012 | Journal of Environmental Sciences2012，24，5： | 12 |
| 2 | Immobilization of lead in anthropogenic contaminated soils using phosphates with/without oxalic acid显示文摘Understanding the effects of oxalic acid(OA) on the immobilization of Pb(Ⅱ) in contaminated soils by phosphate materials, has considerable benefits for risk assessment and remediation strategies for the soil. A series of phosphate amendments with/without oxalic acid were applied to two anthropogenic contaminated soils. We investigated the immobilization of Pb(Ⅱ) by KH2PO4, phosphate rock(PR), activated phosphate rock(APR) and synthetic hydroxyapatite(HAP) at different phosphate:Pb(P:Pb) molar ratios(0, 0.6, 2.0 and 4.0) in the presence/absence of 50 mmol oxalic acid/kg soil, respectively. The effects of treatments were evaluated using single extraction with deionized water or Ca Cl2, Community Bureau of Reference(BCR) sequential extraction and toxicity characteristic leaching procedure(TCLP)methods. Our results showed that the concentration of water extractable, exchangeable and TCLP-Pb all decreased with incubation time. The concentration of water-extractable Pb after120 days was reduced by 100% when soils were amended with APR, HAP and HAP + OA, and the TCLP-Pb was <5 mg/L for the red soil at P:Pb molar ratio 4.0. Water-soluble Pb could not be detected and the TCLP-Pb was <5 mg/L at all treatments applied to the yellow-brown soil. BCR results indicated that APR was most effective, although a slight enhancement of water-soluble phosphate was detected at the P:Pb molar ratio 4.0 at the beginning of incubation. Oxalic acid activated phosphates, and so mixing insoluble phosphates with oxalic acid may be a useful strategy to improve their effectiveness in reducing Pb bioavailability. | Xiaojuan Su Jun Zhu Qingling Fu Jichao Zuo Yonghong Liu Hongqing Hu | 2015 | Journal of Environmental Sciences2015，27，2： | 9 |
| 3 | Equilibrium kinetic and thermodynamic studies on the adsorption of the toxins of Bacillus thuringiensis subsp kurstaki by clay minerals显示文摘 | Fu Qingling Deng Yali Li Huishu | 2009 | Applied Surface Science2009，255，8： | 1 |
| 4 | Continuous re- view inventory models with a mixture of backorders and lost sales under fuzzy demand and different deci- sion situations 显示文摘 | Wang Lin Fu Qingling Zeng Yurong | 2012 | Expert Systems with Applications2012，39，4： | 1 |
| 5 | Immobilization of lead in anthropogenic contaminated soils using phosphates with/without oxalic acid显示文摘 | Xiaojuan Su Jun Zhu Qingling Fu Jichao Zuo Yonghong Liu Hongqing Hu | 2014 | Journal of Environmental Sciences2014，，： | 1 |
| 6 | Equilibrium,kinetic and thermodynamic studies on the adsorption of the toxins of Bacillus thuringiensis subsp, kurstaki by clay minerals显示文摘 | FU Qingling DENG Yali Li Huishu | 2009 | Applied Surface Science2009，255，8： | 1 |
| 7 | Impacts of inorganic ions and temperature on lead adsorption onto variable charge soils显示文摘 | Nkwopara Ugochukwu Ibrahim Mohamed Maha Ali Javed Iqbal Qingling Fu Jun Zhu Guanjie Jiang Hongqing Hu | 2013 | Catena2013，，： | 1 |
| 8 | Equilibrium, kinetic and thermodynamic studies on the adsorption of the toxins of Bacil- lus thuringiensis subsp Kurstaki by clay minerals 显示文摘 | Fu Qingling Dang Yali Li Huishu | 2009 | Appl Surf Sci2009，255，8： | 1 |
| 9 | System identification using slow and irregular output samples显示文摘 | Yucai Zhu Herman Telkamp Jinghua Wang Qingling Fu | 2008 | Journal of Process Control2008，，1： | 1 |
| 10 | STATE VERIFICATION FOR SYNCHRONOUS CIRCUITS显示文摘This paper presents the techniques of implicit traversing and state verification for sequential finite state machines(FSMs) based of on the state collapsing of state transition graph(STG). The problems of state designing are described. In order to achieve high state enumeration coverage, heuristic knowledge is proposed. | He Xinhua Gong Yunzhan Fu Qingling(Armored Force Engineering Institute, Beijing 100072) | 1997 | Journal of Electronics(China)1997，14，2： | 0 |
| 11 | Space-confined microwave synthesis of ternary-layered BiOCl crystals with high-performance ultraviolet photodetection显示文摘In recent years,two-dimensional(2D)ternary materials have attracted wide attention due to their novel properties which can be achieved by regulating their chemical composition with a very great degree of freedom and adjustable space.However,as for the precise synthesis of 2D ternary materials,great challenges still lie ahead that hinder their further development.In this work,we demonstrated a simple and reliable approach to synthesize 2D ternary-layered BiOCl crystals through a microwave-assisted space-confined process in a short time(<3 minutes).Their ultraviolet(UV)detection performance was analyzed systematically.The photodetectors based on the as-obtained BiOCl platelets demonstrate high sensitivity to 266-nm laser illumination.The responsivity is calculated to be8 A/W and the response time is up to be18 ps.On the other hand,the device is quite stable after being exposed in the ambient air within 3 weeks and the response is almost unchanged during the measurement.The facile and fast synthesis of single crystalline BiOCl platelets and its high sensitivity to UV light irradiation indicate the potential optoelectronic applications of 2D BiOCl photodetectors. | Lixing Kang Xuechao Yu Xiaoxu Zhao Qingling Ouyang Jun Di Manzhang Xu Dan Tian Weiliang Gan Calvin CIAng Shoucong Ning Qundong Fu Jiadong Zhou R.G.Kutty Ya Deng Pin Song Qingsheng Zeng Stephen J.Pennycook Jun Shen Ken-T.Yong Zheng Liu | 2020 | InfoMat2020，2，3： | 0 |
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