|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 三种金属阳极电絮凝法除磷效果对比实验研究显示文摘水体中存在过量的磷元素会造成水体富营养化等环境问题,采用镁、铝和铁作为电絮凝法中的阳极对模拟废水中总磷进行去除,分别考察电流密度和溶液初始pH对总磷去除效果的影响。结果表明:镁阳极、铝阳极和铁阳极的最佳电流密度依次为15、20、15 mA/cm^(2),三种金属阳极最佳的初始pH均为7,电解60 min后总磷的去除率依次为99.80%、99.78%和99.56%。溶液中总磷的去除过程符合一级反应动力学方程,同时各电极在最佳反应条件下在实际废水中的去除效果依次为98.0%、97.7%和68.6%。絮凝体分析结果表明镁阳极和铝阳极产生的絮凝体结构稳定相对于铁阳极能够更好的去除废水中的总磷。 | 陈鹏 李俊峰 王健康 曲文颖 谷天天 陈翠忠 | 2022 | 水处理技术2022，48，8： | 4 |
| 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 | 介质阻挡放电等离子体老化微塑料及对Zn(Ⅱ)吸附的影响显示文摘为了在实验中缩短微塑料的老化时间,更真实地模拟自然老化条件,采用介质阻挡放电(DBD)等离子体老化聚乙烯微塑料(PE-MP)和聚丙烯微塑料(PP-MP),同时研究了老化前后PE-MP和PP-MP对Zn(Ⅱ)的吸附过程和机理.随着放电时间延长和输入电压升高,微塑料表面出现微小裂纹或孔洞,形成含氧官能团.老化后PE-MP和PP-MP对Zn(Ⅱ)的吸附容量分别提高了22.7%和14.8%.老化前后微塑料对Zn(Ⅱ)的吸附均符合准二级动力学模型.颗粒内扩散模型表明,Zn(Ⅱ)在微塑料上的吸附过程可分为快速吸附,慢速吸附和吸附平衡3个阶段.同时,老化前后微塑料对Zn(Ⅱ)的吸附均符合Langmuir吸附等温线模型.热力学结果表明,微塑料对Zn(Ⅱ)的吸附是自发的吸热过程.Ca^(2+)、腐殖酸和低pH值不利于微塑料对Zn(Ⅱ)的吸附. | 卢伟 桑稳姣 李敏 张文斌 贾丹妮 占诚 贺永健 陈翠珍 向雪莲 | 2022 | 中国环境科学2022，42，8： | 3 |
| 4 | Highly efficient P uptake by Fe3O4 loaded amorphous Zr-La (carbonate) oxides: Electrostatic attraction, inner-sphere complexation and oxygen vacancies acceleration effect显示文摘Bimetallic oxides composites have received an increasing attention as promising adsorbents for aqueous phosphate (P) removal in recent years. In this study, a novel magnetic composite MZLCO was prepared by hybridizing amorphous Zr-La (carbonate) oxides (ZLCO) with nano-FeOthrough a one-pot solvothermal method for efficient phosphate adsorption. Our optimum sample of MZLCO-45 exhibited a high Langmuir maximum adsorption capacity of 96.16 mg P/g and performed well even at low phosphate concentration. The phosphate adsorption kinetics by MZLCO-45 fitted well with the pseudo-second-order model, and the adsorption capacity could reach 79% of the ultimate value within the first 60 min. The phosphate adsorption process was highly p H-dependent, and MZLCO-45 performed well over a wide p H range of 2.0-8.0. Moreover, MZLCO-45 showed a strong selectivity to phosphate in the presence of competing ions (Cl^(-), NO_(3)^(-), SO_(4)^(2-), HCO_(3)^(-), Ca^(2+), and Mg^(2+)) and a good reusability using the eluent of Na OH/Na Cl mixture, then 64% adsorption capacity remained after ten recycles. The initial 2.0 mg P/L in municipal wastewater and surface water could be efficiently reduced to below 0.1mg P/L by 0.07 g/L MZLCO-45, and the phosphate removal efficiencies were 95.7% and 96.21%, respectively. Phosphate adsorption mechanisms by MZLCO-45 could be attributed to electrostatic attraction and the inner-sphere complexation via ligand exchange forming Zr/La-O-P, -OH and CO_(3)^(2-)groups on MZLCO-45 surface played important roles in the ligand exchange process. The existence of oxygen vacancies could accelerate the phosphate absorption rate of the MZLCO-45 composites. | Chenyang Liu Yili Wang Xiaolin Li Junyi Li Shuoxun Dong Haotian Hao Yao Tong Yanqing Zhou | 2022 | Journal of Environmental Sciences2022，34，10： | 2 |
| 5 | ZnMnCo-LDHs的制备及其对磷酸根废水吸附性能研究显示文摘采用水热法合成三元过渡金属ZnMnCo-LDHs纳米材料,探究Co元素的含量对磷酸根废水吸附性能的影响。在温度100℃、2 h、1 mL三乙醇胺的条件下,制备不同比例ZnMnCo-LDHs纳米材料,以浓度为100 mg/L的KH_(2)PO_(4)溶液模拟含磷废水测试材料的吸附性能。利用SEM、XRD和FT-IR等技术表征。结果表明:3种ZnMnCo-LDHs纳米材料均为片层状结构,层间插层离子为NO-3。随着Co含量的增加,ZnMnCo-LDHs片状的厚度逐渐变薄,证明Co含量的增加对片状结构具有调控作用。3种ZnMnCo-LDHs纳米材料对磷酸根废水的最大吸附量分别为738.14、732.69、709.6 mg/g。吸附等温线符合Freundlich模型;吸附动力学符合准二级动力学;吸附热力学得出为自发进行的吸热反应。ZnMnCo-LDHs纳米材料经过6次循环性能的测试,去除率仍保持在80%以上,具有良好的循环性能。 | 崔宝玉 李阳 王家花 崔节虎 | 2023 | 化学试剂2023，45，10： | 1 |
| 6 | Improved utilization of active sites for phosphorus adsorption in FeOOH/anion exchanger nanocomposites via a glycol-solvothermal synthesis strategy显示文摘Metal oxide/hydroxide-based nanocomposite adsorbents with porous supporting matrices have been recognized as efficient adsorbents for phosphorus recovery.Aiming at satisfying increasingly restrictive environmental requirements involving improving metal site utilization and lowering metal leakage risk,a glycol-solvothermal confined-space synthesis strategy was proposed for the fabrication of Fe OOH/anion exchanger nanocomposites(Fe/900s)with enhanced metal site utilization and reduced metal leakage risk.Compared to composites prepared using alkaline precipitation methods,Fe/900s performed comparably,with a high adsorption capacity of 19.05 mg-P/g with an initial concentration of 10 mg-P/L,a high adsorption selectivity of 8.2 mg-P/g in the presence of 500 mg-SO_(4)^(2-)/L,and high long-term resilience(with a capacity loss of~14%after five cycles),along with substantially lower Fe loading amount(4.11 wt.%)and Fe leakage percentage.Mechanistic investigation demonstrated that contribution of the specific Fe OOH sites to phosphate adsorption increased substantially(up to 50.97%under the optimal conditions),in which Fe(Ⅲ)-OH was the dominant efficient species.The side effects of an excessively long reaction time,which included quaternary ammonium decomposition,Fe OOH aggregation,and Fe(Ⅲ)reduction,were discussed as guidance for optimizing the synthesis strategy.The glycol-solvothermal strategy provides a facile solution to environmental problems through nanocrystal growth engineering in a confined space. | Yi Zhang Qiong Tang Yifan Sun Chenxu Yao Zhen Yang Weiben Yang | 2022 | Journal of Environmental Sciences2022，34，1： | 0 |
| 7 | 生物质金属氧化物复合纳米材料用于污水除磷的研究进展显示文摘磷是水体富营养化的限制性污染因子,吸附法是污水深度除磷的常用技术之一。在众多吸附材料中,纳米金属氧化物因活性位点多、选择性强等特点被认为是理想的除磷吸附剂,但也存在易团聚、难操作、易流失等应用瓶颈。生物质材料来源广、成本低,具有丰富的孔隙结构和较高的比表面积,且富含羟基、羧基等功能基团,是纳米金属氧化物理想的载体材料。对生物基金属氧化物复合纳米材料在污水除磷领域的研究进展进行了总结和评述,介绍了材料的制备方法及深度除磷机制,并对其未来的研究发展方向进行了展望。 | 李含 许海民 赵雨 唐欢 陈嘉超 姜东浩 宋佩霖 杨文澜 | 2023 | 化工新型材料2023，51，1： | 0 |
| 8 | 机械化学法制备载铝活性炭对矿井水的除氟性能研究显示文摘我国西部煤炭主产区矿井水中氟化物(F-)超标问题逐年加重,已严重制约了矿区的可持续发展,提出有效的F去除技术是提高矿井水利用效率的关键。通过机械化学法一步固相反应制备了负载氧化铝的活性炭(Al_(2)O_(3)/C)吸附剂,该方法可同时实现Al_(2)O_(3)和活性炭的活化和吸附剂制备,制备过程不产生废液废渣,能耗低。Al_(2)O_(3)/C投加量为10 g/L时,pH值为5~10对水中F去除率可达到75%以上;高浓度SO_(4)^(2-)(-3000 mg/L)、Cl(-3000 mg/L)和腐殖酸对F去除影响很小,但HCO_(3)^(-)浓度为1000 mg/L时,F去除率下降至23.8%,矿井水中的HCO_(3)^(-)达到730 mg/L,对Al_(2)O_(3)/C除氟抑制作用明显,F去除率最高达到53.5%,因此在工程实践中应对矿井水进行预处理降低HCO_(3)^(-)的不利影响。Al_(2)O_(3)/C对F的吸附过程符合准二级动力学模型和Langmuir等温模型。Al_(2)O_(3)/C除氟性能与其比表面积和孔径无关,主要依赖于表面负载的Al_(2)O_(3),X射线光电子能谱结果表明:Al-F键的形成是除氟的主要机理。 | 包一翔 齐永辉 钟金魁 李井峰 刘兆峰 李杰 | 2023 | 能源科技2023，21，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员