Autor: Cao, Yang - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ultrafiltration treatment of wastewater contained heavy metals complexed with palygorskite
Autorzy:: Ren, Jun
Cao, Tiany
Yang, Xin
Tao, Ling
Powiązania:: https://bibliotekanauki.pl/articles/778555.pdf
Data publikacji:: 2020
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: palygorskite
heavy metals
ultraﬁltration
complexation
pH
ionic strength
Opis:: Palygorskite was applied in complexation-ultrafiltration treatment of heavy metals in wastewater under different pH and ionic strength. The results indicated that the rejection of heavy metals increased significantly with pH value, and decreased slightly with an increase of ionic strength of Na⁺ and Cl^-. A certain concentration of NaCl significantly reduced the rejection rate of Cu²⁺. The rejection of Cu²⁺, Zn²⁺ and Cd²⁺ could reach over 86.8%, 93.6% and 93.7% at pH of 7 and 0.1 mol/L NaCl. The rejection of heavy metals was severely affected by low molecular weight competing complexing agents and the effect of sodium tartrate was greater than triethanolamine. In the presence of sodium tartrate, the rejection of Cu²⁺, Zn²⁺ and Cd²⁺ could arrive over 81.4%, 57.6% and 60.5% at pH of 7 in 20 min. Palygorskite was offered a potential complexing agent for the removal of heavy metals in wastewater at the complexation-ultrafiltration process.
Źródło:: Polish Journal of Chemical Technology; 2020, 22, 4; 1-9
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Phytochelatins of Cladophora rupestris in Pb2+ absorption and its detoxification
Autorzy:: Zhang, Lu-Sheng
Yang, Liu
Li, Lingsheng
Feng, Xiaoyu
Cao, De-Ju
Liu, Zhao-Wen
Powiązania:: https://bibliotekanauki.pl/articles/27323982.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: phytochelatins
heavy metals
detoxification
Cladophora rupestris
Pb+
fitochelatyny
metale ciężkie
detoksykacja
Opis:: Phytochelatins (PCs) exist widely in plants and are closely related to plant resistance to heavy metals (HMs). Glutathione (GSH) and nonprotein thiols (NPTs) are the major components of PCs. This study investigates the role of the PCs of Cladophora rupestris in Pb2+ accumulation and detoxification. The distribution of Pb2+ in the PCs of C. rupestris was studied. FTIR and XPS are used to characterize the chelating power of Pb2+ with PCs in C.rupestris. The curve fitting of the secondary protein structure is used to identify the functional groups with Pb2+. Results showed that the content of Pb2+ in the PCs of C. rupestris increased with an increase in Pb2+ stress. Pb content increased to 352 and 314 mg/kg in NPTs and GSH, respectively, when Pb stress concentration reached 7.5 mg/dm3 . The Pb2+ fraction of C. rupestris PCs reached a maximum of 10.8 and 9.3% in NPTs and GSH, respectively. The Pb2+ uptake by GSH and NPTs was 40–48% and 52–60%, respectively. Pb2+ bound with the PCs of C. rupestris, forming complexes that contained Pb–OOC, Pb–C=O, CO–Pb, –N=Pb, Pb–NH2, Pb–O, Pb–N–, Pb–C–, Pb–S, and Pb2+ with multiple groups of PCs as bridging ligand atoms.
Źródło:: Environment Protection Engineering; 2023, 49, 3; 31--42
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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