Activated calcium-rich serpentine tailings and their superefficient removal for arsenite, arsenate and cadmium
文献类型： 外文期刊
作者： Chen, Haoyu 1 ; Xie, Yunhe 2 ; Liu, Saihua 2 ; Huang, Rui 1 ; Wei, Wei 2 ; Ji, Xionghui 1 ;
作者机构： 1.Hunan Univ, Coll Biol, LongPing Branch, Changsha 410125, Hunan, Peoples R China
2.Hunan Acad Agr Sci HAAS, Inst Agroenvironm & Ecol, Changsha 410125, Peoples R China
关键词： Thermal activation; Calcium; rich serpentine tailings; Adsorption; Cadmium; arsenic contaminants
期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：6.7； 五年影响因子：6.7 ）
ISSN： 2352-1864
年卷期： 2024 年 35 卷
页码：
收录情况： SCI
摘要： In heavy metal treatment, cost-effective serpentine tailings as adsorbents were in accordance with the objectives of low-carbon development. But both untreated and calcined serpentine showed limited adsorption capacity for arsenic (As) and cadmium (Cd) ions. Here, naturally calcium-rich serpentine tailings associated with dolomite were chosen. Chemical-free thermal activation resulted in the expansion of specific surface area and activation of Si-OH, Mg-OH and CaCO3. Thermal conversion analyses and comparative experimental results identified S600 (the sample activated at 600 degrees C) as the optimal product. S600 maintained similar adsorption capacity under wide initial pH and efficiently removed over 98 % trace contaminants in potable water and reservoir water. Incorporating S600 diminished the release of Cd in soil pore water and improved long-term stability. With a surface water depth of 1.5-2 cm, S600-treated samples exhibited a 29.47 % decrease in combined AsO2- and AsO4 3- concentration compared to untreated samples. Through chemical adsorption, S600 demonstrated superior adsorption capability for AsO2- /AsO4 3-/ Cd2+ at 178.37/383.87/855.87 mg/g (determined by Sips model) compared to natural serpentine (0.23/3.77/14.35 mg/g). The surface complexation, partial oxidation-reduction, ion exchange and co-precipitation process were the primary mechanisms of adsorption. This study proposed that serpentine showed potentiality as an adsorbent for the long-term treatment of cadmiumarsenic contaminants through eco-friendly activation.
- 相关文献
作者其他论文 更多>>
-
Optimizing fertilizer application and straw return to fields to minimize nitrogen and phosphorus runoff losses in double-rice cropping systems
作者：Zhang, Ying;Zhu, Jian;Li, Changjun;Peng, Hua;Song, Min;Dai, Yanjiao;Deng, Kai;Ji, Xionghui;Liu, Ji;Luo, Yue
关键词：Optimized fertilization; Straw return; Double-rice cropping field; Runoff water; Nitrogen and phosphorus losses; High-risk period
-
Enhanced retention of arsenite and arsenate through heterogeneous interactions between Fe(III) (Hydr)Oxides and black carbon: a multi-mechanistic study
作者：Li, Bingyu;Liu, Saihua;Xie, Yunhe;Ji, Xionghui;Li, Bingyu;Liu, Saihua;Xie, Yunhe;Ji, Xionghui;Li, Bingyu;Liu, Saihua;Xie, Yunhe;Ji, Xionghui;Li, Bingyu;Jing, Miaomiao;Li, Jingru;Li, Zhuoqing;Zhou, Yimin;Lei, Ming;Cui, Haojie;Wei, Dongning
关键词：Black carbon; Ferrihydrite; Pore diffusion; Free radical; Arsenic; Sorption
-
Cultivar-specific response of a root-associated microbiome assembly of rice to cadmium pollution
作者：Zhang, Feng;Xie, Yunhe;Ji, Xionghui;Liu, Saihua;Jiang, Huidan;Zhang, Feng;Jiang, Huidan;Zhang, Feng;Xie, Yunhe;Ji, Xionghui;Liu, Saihua;Peng, Rui;Jiang, Huidan
关键词：Paddy soil; Rice cultivars; Root-associated microbiome; Cd; Soil Fe availability; Siderophore-secreting microbe
-
Insights into ROL-driven and ROS-mediated metalloid oxidation and sequestration in the soil-rice iron barrier system
作者：Yang, Jing-Min;Wang, Xin;Peng, Bo;Yang, Jing-Min;Wang, Xin;Peng, Bo;Qin, Qin-Bo;Guan, Dong-Xing;Huang, Rui;Ji, Xiong-Hui;Xie, Yun-He;Huang, Rui;Ji, Xiong-Hui;Xie, Yun-He;Qin, Qin-Bo
关键词：Iron barriers; Arsenic; Reactive oxygen species (ROS); Radial oxygen loss (ROL); Paddy soil
-
Effect of citric acid and biochar addition on combined remediation of ryegrass-Streptomyces spp.
作者：Li, Shuyun;Zhu, Ziyu;Liu, Jiazhen;Fang, Ping;Ji, Xionghui;Fang, Ping;Fang, Ping
关键词：Biochar; citric acid; phytoremediation; ryegrass;
Streptomyces -
Quantify the environmental factors interaction affecting soil Cd/As accumulation in farmland using collaborative filtering model combining global spatial and local property graph
作者：Zhang, Renjie;Xie, Yunhe;Ji, Xionghui;Zhang, Renjie;Xie, Yunhe;Xue, Tao;Liu, Saihua;Tian, Faxiang;Ji, Xionghui;Pan, Shufang;Zhang, Renjie;Xie, Yunhe;Xue, Tao;Liu, Saihua;Tian, Faxiang;Ji, Xionghui;Pan, Shufang
关键词：Interaction effects; Graph attention; Collaborative filtering; Quantization model; Soil cd/as
-
Effects of Aqueous Ozone on Microbial Growth, Quality, and Shelf Life Extension of Chinese Bayberry (Myrica rubra Sieb. et Zucc)
作者：He, Zhongxiang;Li, Changjun;Ji, Xionghui;Peng, Hua;Liu, Shangru;He, Zhongxiang;Li, Changjun;Ji, Xionghui;Peng, Hua;Liu, Shangru;Wu, Weidong
关键词：aqueous ozone; Chinese bayberries; fruit preservation
