Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, N-1432 Aas, Norway.
Chemosphere. 2011 Oct;85(5):759-64. doi: 10.1016/j.chemosphere.2011.06.055. Epub 2011 Jul 23.
The article presents a new approach that can be used for the purification of water contaminated by heavy metals. The treatment of peat with microalgae showed to be an effective way of increasing metal uptake by peat. Metal sorption was studied for a multimetal solution containing Cu, Cd, Ni, Zn, Cd, and Pb. Cu and Pb were found to be the metals having the highest affinity to peat. Water hardness has a strong effect on the uptake of borderline metals (Cd, Ni, Zn, Cd) from a solution. The use of algae for peat treatment resulted in less time to reach an equilibrium (24 h vs. 72 h for pure peat), and the effect of water hardness (Ca²⁺) on metal uptake was considerably reduced. Both peat and algal-treated peat were able to take up metals from rather acidic solutions (pH 3.0). pH had less influence on the metal uptake compared with water hardness. The affinity of heavy metals to peat was the following: Pb>Cu>Ni>Cd>Zn>Co. It slightly changed to Pb>Cu>Ni>Cd≈Co≈Zn when the combined sorbent, peat treated with microalga, was applied.
本文提出了一种新的方法，可用于净化重金属污染的水。用微藻处理泥炭被证明是增加泥炭对金属吸收的有效方法。研究了多金属溶液中 Cu、Cd、Ni、Zn、Cd 和 Pb 的金属吸附情况。结果表明，Cu 和 Pb 是对泥炭亲和力最高的金属。水硬度对溶液中边界金属（Cd、Ni、Zn、Cd）的吸收有很强的影响。用藻类处理泥炭可将达到平衡的时间缩短（纯泥炭为 72 h，藻类处理的泥炭为 24 h），并且水硬度（Ca²⁺）对金属吸收的影响大大降低。泥炭和藻类处理过的泥炭均能从相当酸性的溶液（pH 值 3.0）中吸收金属。与水硬度相比，pH 值对金属吸收的影响较小。重金属对泥炭的亲和力顺序如下：Pb>Cu>Ni>Cd>Zn>Co。当使用用微藻处理过的泥炭作为复合吸附剂时，其顺序略有变化，变为 Pb>Cu>Ni>Cd≈Co≈Zn。
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