海洋巨藻生物吸附剂对Hg^(2+)吸附性能的研究

Study on Hg" Adsorption Capability of Biosorbent from Marine Alga Durvillaea Potatorum

就丰产廉价的海洋巨藻(Durvillaea Potatorum)所制的生物吸附剂对Hg2+的吸附性能进行了研究,该生物吸附剂经特殊的稳定化预处理而得。研究表明,该生物吸附剂的Hg2+吸附容量对溶液的pH值十分敏感,在pH=3时,最大吸附容量达到3.1mmol/g(干重),在溶液pH=0.4～5.0的范围内,Hg2+的吸附容量为0.49—3.1mmol/g(干重);溶液中的C1-能显著地降低生物吸附剂对Hg2+的吸附容量;其对Hg2+的去除率可达到99％以上。该生物吸附剂可以有效地去除工业废水中的Hg2+。

The adsorption capability of Hg2+ by a low-cost biosorbent from marine alga Durvillaea potatorum has been studied. The biosorbent was a pre-treated biomass of D. potatorum with a particular process. It was found that the adsorption capacities were sensitive to the solution pH and the maximum adsorption capacity of the biosorbent for Hg2+ was up to 3.1mmol/g (dry) at pH about 3. The adsorption capacities ranged from 0.49-3.1 mmol/g (dry) within pH range of 0.4-5.0 and were substantially reduced when Cl' existed in the solution. Hg2+ removal proportion reached more than 99%. The results showed that the biosobent could be used as an effective medium for removal and recovery of Hg2+ from industrial wastewater.