文献类型：期刊文献

英文题名：Adsorption of Pb(II) by montmorillonite modified biochars and reduction Pb(II)-stress in plants of microcosms of constructed wetlands: mechanism and treatment performances

作者：Zhang, Yaohong[1,2];Liu, Renrong[1];Tan, Liya[1];Yang, Ningcan[1];Kerkula, Anna[1];Wang, Hai[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Sch Chem & Chem Engn, Shaoxing 312000, Peoples R China;[2]Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China

年份：2021

卷号：221

起止页码：152

外文期刊名：DESALINATION AND WATER TREATMENT

收录：SCI-EXPANDED(收录号：WOS:000655546900014)、、Scopus(收录号：2-s2.0-85107412391)、WOS

基金：This research was supported by the Joint Funds of the Zhejiang Provincial Natural Science Foundation of China under Grant No. LZY21C030001 and National Natural Science Foundation of China under Grant No. 31500321.

语种：英文

外文关键词：Modified biochars; Constructed wetland; Pb(II); Plant; Stress

外文摘要：In the study, the peanut shell was selected as original biochar and modified by adding montmorillonite to obtain modified biochar (B@M). The adsorbent was characterized by scanning electron microscopy, Brunauer-Emmett-Teller, Fourier-transform infrared spectroscopy and X-ray diffraction. The adsorption kinetics study of Pb(II) on B@M showed that the adsorption process of Pb(II) was according to the pseudo-second-order model and Langmuir adsorption model. The maximum adsorption capacity of B@M (61.5 mg g(-1)) was significantly higher than that of the biochar (35.5 mg g(-1)) and montmorillonite (54.4 mg g(-1)) and the reproducibility study indicated that B@M had good reproducibility. When the B@M was added to the microcosms of constructed wetlands (MCW), it showed that with the increase of the amount of B@M, the removal rate of lead in water increased significantly, which was 31.3%, 48.3% and 86.1%, respectively and can reduce the stress of Pb(II) in plants of MCW. Therefore, B@M can be used as a new substrate material and heavy metal Pb(II) adsorbent for constructed wetlands.