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| 1 | 人工湿地新型陶粒基质的制备及除磷性能研究显示文摘以聚氯化铝残渣(PACR)为主要原材料,经过破碎、筛选、混合、成球、预热、煅烧等工序制备陶粒基质。通过正交设计-极差分析法的探究,确定出陶粒基质的最佳制备条件:PACR∶膨润土=14 g∶6 g,蛋壳0.6 g,煅烧温度600℃,煅烧时间60 min。采用SEMEDS、XRD等表征磷吸附前后其微观形貌、元素变化及晶体结构。静态吸附实验表明,制备的陶粒基质具有较好的磷吸附特性,去除率可达99.74%,吸附量可达4.12 mg/g,吸附过程符合准二级动力学模型,受物理化学过程控制。Freundlich和Langmuir模型均能较好地拟合陶粒基质对磷的吸附特征,表明陶粒基质为磷吸附提供了均相单层和非均相多层活性位点。饱和吸附磷的形态分析表明,铝、钙、铁对磷的化学吸附是陶粒基质主要的吸附机理。动态吸附试验表明,Thomas模型和Yoon-Nelson模型均能较好模拟陶粒基质的动态吸附数据,进水磷浓度越大,陶粒基质吸附柱的穿透时间越短。可见利用PACR制备的陶粒基质,不仅可以广泛应用于污水中磷的净化处理,还能够解决河南巩义地区PACR的处理问题,达到变废为宝、绿色环保的目的。 | 李强 张敬申 梁瑞恒 王世龙 高镜清 宋勃震 黄真真 褚军辉 | 2021 | 环境科学与技术2021，44，12： | 7 |
| 2 | High phosphate removal using La(OH)3 loaded chitosan based composites and mechanistic study显示文摘Our present study was to prepare a biomass-supported adsorbents with high adsorptive capacity and high selectivity to prevent the accelerated eutrophication in water body.To this end,different metal hydroxide(La,Zr and Fe)first was successfully loaded on chitosan microspheres.Then the quaternary ammonium group with different content was introduced into the adsorbent by polymerization.By comparison of adsorption properties,chitosanLa(OH)3-quaternary ammonium-20%(CS-La-N-20%)has strong adsorption to phosphate(160 mg/g)by immobilizing nano-sized La(OH)3 within a quaternary-aminated chitosan and it maintain high adsorption in the presence of salt ions.The pH results indicated that the CS-La-N-20%would effectively sequestrate phosphate over a wide pH range between 3 and 7 without significant La3+leaching.What’s more,adsorption capacity on the introduce of positively charged quanternary-aminated groups was significantly higher than that of the unmodified adsorbents at alkaline conditions.The column adsorption capacity reached 1300 bed volumes(BV)when phosphate concentration decreased until 0.5 mg/L at 6 BV/hr.The column adsorption/desorption reveals that no significant capacity loss is observed,indicating excellent stability and repeated use property.Characterizations revealed that phosphate adsorption on CS-La-N-20%through ligand exchange(impregnated nano-La(OH)3)and electrostatic attraction(positively charged quanternary-aminated groups).All the results suggested that CS-La-N-20%can serve as a promising adsorbent for preferable phosphate removal in realistic application. | Shaopeng Zhang Yi Zhang Jie Ding Zepeng Zhang Chao Gao Muslim Halimi Hary Demey Zhen Yang Weiben Yang | 2021 | Journal of Environmental Sciences2021，33，8： | 3 |
| 3 | 剩余污泥裂解灰吸附去除黑臭水体中磷的研究显示文摘通过将城市污水处理厂剩余污泥高温裂解制成的裂解灰作为吸附剂用以去除黑臭水体中的磷,并对溶液的初始pH值、反应温度、吸附时间和磷初始浓度对除磷效果的影响进行研究。研究结果表明,裂解灰作为吸附剂用以去除黑臭水体中磷的最佳pH值为中性;溶液中反应温度的升高有利于吸附除磷;吸附等温线符合Langmuir方程,属于单分子层均相吸附;该吸附过程容易进行,吸附动力学过程符合拟二级动力学;剩余污泥高温裂解成的裂解灰对磷的最大吸附量为15.287 mg/g。 | 谢雨涵 杨璨雨 欧杨 马婷 董佳甜 李向东 | 2023 | 环境科技2023，36，5： | 0 |
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