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		多硫化钙还原高浓度含铬废水实验研究
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			Experimental study on reduction of high concentration chromium-containing wastewater by calcium polysulfide
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| 图2. 不同CaSx投加量下Cr(Ⅵ)的去除率 | 
| Fig.2. The removal rate of Cr(Ⅵ) under different dosages of CaSx | 
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