Role of extracellular polymeric substances from Chlorella vulgaris in the removal of ammonium and orthophosphate under the stress of cadmium
Role of extracellular polymeric substances from Chlorella vulgaris in the removal of ammonium and orthophosphate under the stress of cadmium
复制标题
普通小球藻胞外聚合物在镉胁迫下去除铵和正磷酸盐的作用。
DOI：
10.1016/j.biortech.2015.04.080
复制
发表时间：
2015-08-01
影响因子：
11.4
通讯作者：
Yang, Yixuan
中科院分区：
文献类型：
--
作者：
Chen, Biao;Li, Feng;Yang, Yixuan
藻类的可溶性胞外聚合物（S-EPS）、结合型EPS （B-EPS）与重金属之间的相互作用将影响藻类技术对废水中铵（NH4+-N）和正磷酸盐（PO43 -P）的去除。本文研究了Cd-2（+）介导的小球藻EPS对NH4+-N和PO43 -P去除的作用。结果表明，在Cd2+ 1.0 mg/L条件下，藻体对NH4+-N和PO43 -P的去除率仍分别为62.6%和64.9%，主要原因是藻体中S-EPS和B-EPS含量均有所提高。PS（多糖）和PN（蛋白质，如色氨酸样成分和酪氨酸样成分）的增加导致Cd2+与EPS馏分中PS和PN的相互作用加速，特别是B-EPS，因为Cd2+的检测分布较高（例如，B-EPS中约为55.4%）。因此，藻类技术是处理NH4+-N和PO43 -P与重金属共存的废水的稳定方法。(C) 2015 Elsevier Ltd.版权所有。
The interactions between the soluble extracellular polymeric substances (S-EPS), bound EPS (B-EPS) of algae and heavy metal, would affect the removal of ammonium (NH4+-N) and orthophosphate (PO43 -P) from wastewater by algae-based techniques. This study investigated the role of Cd-2(+)-mediated EPS from Chlorella vulgaris on NH4+-N and PO43 -P removal. The results showed that the removal efficiencies of NH4+-N and PO43 -P still separately remained 62.6% and 64.9% under 1.0 mg/L Cd2+, compared to those without Cd2+, mainly attributing to enhanced S-EPS and B-EPS contents of the algae. The increased of PS (polysaccharides) and PN (proteins, e.g., tryptophan-like and tyrosine-like components) led to accelerated interactions of Cd2+ with PS and PN in EPS fractions, especially for B-EPS, due to a higher detected distribution of Cd2+ (e.g., about 55.4% in B-EPS). Thus, algae-based techniques are stable treatment methods for wastewater in which NH4+-N and PO43 -P coexist with heavy metals. (C) 2015 Elsevier Ltd. All rights reserved.