当前位置: X-MOL 学术npj Clean Water › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Phosphorus removal and recovery from wastewater via hybrid ion exchange nanotechnology: a study on sustainable regeneration chemistries
npj Clean Water ( IF 11.4 ) Pub Date : 2021-01-21 , DOI: 10.1038/s41545-020-00097-9
Miles Ownby , David-Alexandre Desrosiers , Céline Vaneeckhaute

Technologies that allow for removal and subsequent recovery and reuse of phosphorus from polluted streams are imperative. One such technology is hybrid ion exchange nanotechnology (HIX-Nano), which may allow to produce a valuable nutrient solution following phosphorus desorption of the saturated media. This study evaluated the potential of four regeneration chemistries to desorb phosphorus from a commercially available HIX-Nano resin hybridized with iron oxide nanoparticles using a design of experiments (DoE) approach. More sustainable and less harmful regeneration solutions using a KOH/K2SO4 blend or a recovered NH4OH alkaline solution, along with tap water instead of synthetic acid, were compared to a control solution of KOH and H2SO4. Among the four regeneration methods studied, using the combination of recovered NH4OH and tap water shows the highest phosphorus recovery potential because: (i) it involves low cost and sustainable products, (ii) it showed a relatively high recovery efficiency (75 ± 15% as compared to the control at 89 ± 13%), and (iii) it did not demonstrate any significant dampening of the resin longevity after five adsorption and desorption cycles. Based on the DoE data, a series of regression models was developed to generate understanding of the effect of important operational parameters (volume of the regenerant solution, rinse speed, strength of the alkaline solution) on the phosphorus concentration in the recovered nutrient solution. Overall, this study indicates that HIX-Nano may contribute to providing a cost-effective and sustainable technological solution to tackle the phosphorus problem in wastewater treatment applications across the globe.



中文翻译:

混合离子交换纳米技术去除废水中的磷并进行回收:可持续再生化学研究

迫切需要能够去除污染的溪流中磷并随后对其进行回收和再利用的技术。一种这样的技术是混合离子交换纳米技术(HIX-Nano),它可以在饱和介质的磷解吸后产生有价值的营养液。这项研究使用实验设计(DoE)方法评估了四种再生化学方法从与氧化铁纳米粒子杂交的市售HIX-Nano树脂中解吸磷的潜力。将使用KOH / K 2 SO 4混合物或回收的NH 4 OH碱性溶液以及自来水代替合成酸的更可持续,危害较小的再生溶液与KOH和H 2的对照溶液进行了比较SO 4。在研究的四种再生方法中,结合使用回收的NH 4OH和自来水显示出最高的磷回收潜力,因为:(i)它涉及低成本且可持续的产品,(ii)它显示出相对较高的回收效率(与对照组的89±13%相比,为75±15%), (iii)在五个吸附和解吸循环后,树脂寿命没有明显降低。基于DoE数据,开发了一系列回归模型以了解重要操作参数(再生溶液的体积,漂洗速度,碱性溶液的强度)对回收的营养液中磷浓度的影响。总体,

更新日期:2021-01-21
down
wechat
bug