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首页> 外文会议>Conference on Environmental Science and Information Application Technology >Remediation of heavy metals polluted surface water by vermiculite Complex ecosystem filter
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Remediation of heavy metals polluted surface water by vermiculite Complex ecosystem filter

机译：通过蛭石复合体系过滤器修复重金属污染的地表水

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摘要

The present study was conducted to investigate the heavy metals (HMS) removal from aqueous solutions in Complex ecosystem filter (CEF) with vermiculite substrate. Experimental results showed that the CEF was highly effectively in removal of HMS and the average removal rates of Cu~(2+), Zn~(2+), Pb~(2+) and Cd~(2+) were 81.60%, 80.55%, 83.20% and 62.21% respectively, under the hydraulic loading of 2.0m~3/m~2.d. The effluent concentration of HMS complied with the water quality standard of according to the Chinese Standard of Surface Water Environment Quality (GB3838-2002). The discernable trend is that roots accumulate significantly greater concentrations of metals than stems and leaves for all four metals. The Cu~(2+) concentration ranged from 4.11 to 8.23 mg/kg in the root tissues, while varied from 2.23 to 3.02 mg/kg in the stem tissues and from 1.32 to 1.85 mg/kg in the leaves tissues. The concentration of Cu~(2+) on vermiculite substrate was stable at about 30mg/kg, which suggested that the HMS assimilated by vermiculite substrate could be absorb by plant roots. Thus the adsorption capacity of vermiculite was effectively improved, as well as the work cycle of the CEF.
机译：进行本研究以研究与蛭石基质复合生态系统过滤器（CEF）中的水溶液中的重金属（HMS）除去。实验结果表明，CEF高度有效地去除HMS，Cu〜（2+），Zn〜（2+），Pb〜（2+）和Cd〜（2+）的平均除去速率为81.60％，为81.60％， 80.55％，83.20％和62.21％，液压负载下2.0m〜3 / m〜2.d。 HMS的流出浓度符合中国地表水环境质量标准（GB3838-2002）的水质标准。可辨别的趋势是，对于所有四种金属，根部的根部积聚明显更大的金属浓度。 Cu〜（2+）浓度在根组织中的4.11至8.23mg / kg范围为4.11至8.23mg / kg，同时在茎组织中的2.23至3.02mg / kg变化，叶组织中的1.32至1.85mg / kg。蛭石底物上Cu〜（2+）的浓度在约30mg / kg的约30mg / kg稳定，这表明通过蛭石底物同化的HMS可以通过植物根部吸收。因此，有效改善了蛭石的吸附能力，以及CEF的工作循环。

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