当前位置: X-MOL 学术Environ. Technol. › 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.)
Improving removal rate and efficiency of As(V) by sulfide from strongly acidic wastewater in a modified photochemical reactor
Environmental Technology ( IF 2.8 ) Pub Date : 2021-02-03 , DOI: 10.1080/09593330.2021.1877360
Linghao Kong 1, 2 , Yuchen Wang 3 , Xingyun Hu 1, 2 , Xianjia Peng 1, 2, 4 , Zhilin Xia 1, 2, 4 , Jianbing Wang 3
Affiliation  

ABSTRACT

Employing ultraviolet light to enhance the removal of As(V) by sulfide (S(-II)) from strongly acidic wastewater is a potential method. However, we found the arsenic trisulfide (As2S3) and elemental sulfur (S8) particles formed in this method not only vastly hinder light transmission in the wastewater but also undergo light-induced redissolution, leading to a decrease in removal rate and efficiency of As(V). Herein, As(V) removal by sulfide from strongly acidic wastewater was performed in a modified photochemical reactor to weaken the effect of the formed particles on As(V) removal. It was found that in this study, the formed particles could be efficiently removed from the photoreactor by three operations, i.e. circulation-filtration, septum setting, and lamp sleeve cleaning. The removal of As(V) was approximately 11-fold faster than that without three operations, saving 90.9% of the reaction time and 89.4% of energy consumption. The removal efficiency of As(V) also increased through weakening the light-induced redissolution of the formed particles. This study facilitates the practical application of the UV light promoted As(V) removal technology and also provides a new method to lessen the light-blocking effect in the particle-forming photochemical reaction systems.



中文翻译:

改进光化学反应器中硫化物对强酸性废水中 As(V) 的去除率和效率

摘要

利用紫外线增强硫化物 (S(-II)) 从强酸性废水中去除 As(V) 是一种潜在的方法。然而,我们发现了三硫化砷 (As 2 S 3 ) 和元素硫 (S 8) 在这种方法中形成的颗粒不仅极大地阻碍了废水中的光传输,而且还经历了光诱导的再溶解,导致 As(V) 的去除率和效率下降。本文在改进的光化学反应器中通过硫化物从强酸性废水中去除 As(V),以削弱形成的颗粒对 As(V) 去除的影响。研究发现,通过循环过滤、隔垫设置和灯套清洗三个操作,可以有效地从光反应器中去除形成的颗粒。As(V)的去除速度比不进行三步操作快约11倍,节省了90.9%的反应时间和89.4%的能耗。As(V) 的去除效率也通过减弱形成颗粒的光诱导再溶解而提高。

更新日期:2021-02-03
down
wechat
bug