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| 1 | Material conversion from paper sludge ash in NaOH solution to synthesize adsorbent for removal of Pb^(2+),NH_4^+and PO_4^(3-) from aqueous solution显示文摘Material conversion from paper sludge ash (PSA) in NaOH solution was attempted to synthesize the adsorbent for removal of inorganic pollutants, such as Pb 2+ , NH 4 + and PO 4 3- from aqueous solution. PSA of 0.5 g was added into 10 mL of 3 mol/L NaOH solution, and then heated at 80, 120, and 160°C for 6-48 hr to obtain the product. PSA mainly composed of two crystalline phases, gehlenite (Ca 2 Al 2 SiO 7 ) and anorthite (CaAl 2 Si 2 O 8 ), and amorphous phase. Hydroxysodalite (Na 6 Al 6 Si 6 O 24 ·8H 2 O) was formed at 80°C, and anorthite dissolved, whereas gehlenite remained unaffected. Katoite (Ca 3 Al 2 SiO 4 (OH) 8 ) was formed over 120°C, and hydroxycancrinite (Na 8 (OH) 2 Al 6 Si 6 O 24 ·2H 2 O) was formed at 160°C, due to the dissolution of both gehlenite and anorthite. Specific surface areas of the products were almost same and were higher than that of raw ash. Cation exchange capacities (CECs) of the products were also higher than that of raw ash, and CEC obtained at lower temperature was higher. Removal abilities of products for Pb 2+ , NH 4 + , and PO 4 3- were higher than that of raw ash. With increasing reaction temperature, the removal efficiencies of Pb 2+ and NH 4 + decreased due to the decrease of CEC of the product, while removal efficiency for PO 4 3- was almost same. The concentrations of Si and Al in the solution and the crystalline phases in the solid during the reaction explain the formation of the product phases at each temperature. | Takaaki Wajima Kenzo Munakata | 2011 | Journal of Environmental Sciences2011，23，5： | 4 |
| 2 | 无机吸附材料在水处理中的研究进展显示文摘随着科技的腾飞与社会的发展,重金属工业污水对自然环境的污染与金属资源的不可再生这两大问题日益严重。无机吸附材料作为一种原料来源广泛、种类繁多的吸附材料,吸附容量较大且成本低廉,在水处理领域实用性较强。系统地介绍了无机吸附材料的种类与物理化学特性,着重介绍了矿物类吸附材料的研究现状,并对无机吸附材料在水处理领域中的吸附机理与工程应用进行了综述。阐述了重金属离子选择性吸附材料与可降解生物质基吸附材料的研究现状与发展趋势,最后对吸附材料的发展方向进行了展望。 | 赵坤 陈进 孙建科 刘莹莹 刘璐 易大伟 | 2022 | 化工新型材料2022，50，9： | 1 |
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