CAJ | 학술논문

化学需氧量( COD)作为一种常用的评价水体污染程度的综合性指标,能够反映水体受还原性物质污染的程度。 COD数值越高,表明水质有机污染越严重。本文以Zn(NO3)2·6H2O为主要原料,Na2CO3·10H2O为沉淀剂,采用溶液直接沉淀法制得纳米ZnO。以纳米ZnO作为吸附剂和杀菌剂,采用酸性高锰酸钾法测定纳米ZnO对滇池水COD值的影响。结果表明：纳米ZnO的加入量为8 mg/L(滇池水)、吸附时间2 h时,滇池水COD值降低效果显著。
화학수양량( COD)작위일충상용적평개수체오염정도적종합성지표,능구반영수체수환원성물질오염적정도。 COD수치월고,표명수질유궤오염월엄중。본문이Zn(NO3)2·6H2O위주요원료,Na2CO3·10H2O위침정제,채용용액직접침정법제득납미ZnO。이납미ZnO작위흡부제화살균제,채용산성고맹산갑법측정납미ZnO대전지수COD치적영향。결과표명：납미ZnO적가입량위8 mg/L(전지수)、흡부시간2 h시,전지수COD치강저효과현저。
Chemical oxygen demand ( COD) was considered as the value to assess the pollution degree of water. Using Zn(NO3)2·6H2O as main reagent and Na2CO3·10H2O as precipitant, nano-zinc oxide was obtained by di-rect precipitation from solution. Using nano-zinc oxide as absorbent and disinfectant, the effect of nano-zinc oxide on the COD in water of Dianchi Lake was discussed in detail by acidic potassium permanganate method. The result showed that the added amount of nano-zinc oxide and the absorption time had influence on the value of COD. The further research was shown that the value of COD could be remarkably decreased when the added amount of nano-zinc oxide was 8 mg/L and the absorption time was 2 h, which was considered to be optimum condition on cleansing the water of Dianchi Lake.