【摘要】 在模拟日光辐射条件下,研究了内分泌干扰物壬基酚(NP)在腐殖酸(HA)、Fe(Ⅲ)、Cu(Ⅱ)及两种金属离子分别协同腐殖酸的络合体系下的光降解现象,探讨了腐殖酸浓度、Fe(Ⅲ)浓度、Cu(Ⅱ)浓度、光照时间等对NP光解的影响.研究结果表明:NP直接光降解率较低,加入低浓度HA时对NP光解有促进作用,HA浓度增大对NP光解起抑制作用,且随浓度增大抑制作用增强;Fe(Ⅲ)浓度越大,壬基酚的降解率越大;在相同的光照条件下,腐殖酸和铁的络合体系表现出更强的降解作用,降解能力依次为NP+HA+Fe(Ⅲ)>NP+Fe(Ⅲ)>NP+HA>NP.Cu(Ⅱ)低浓度时,对壬基酚光降解有促进作用;当Cu(Ⅱ)浓度超过0.3 mmol/L时,反而会削弱Cu(Ⅱ)对壬基酚光降解的促进作用;Cu(Ⅱ)在与腐殖酸共存时,会促进壬基酚的降解,降解能力依次为NP+HA+Cu(Ⅱ)>NP+Cu(Ⅱ)>NP+HA>NP.更多还原

【Abstract】 In this paper,under the condition of simulated solar radiation,it was studied that humic acid,iron ions,copper ions and the two metal ions cooperate with HA howto affect the light degradation of endocrine disrupter NP. The results showed that the NP’ s direct photodegradation rate was low,lowconcentration of NP can stimulate HA ’ s photolysis. The increase of HA ’ s concentration had inhibitory effect on NP photolysis,and the higher concentration of HA was,the strong inhibitory effect had. The greater the concentration of Fe( Ⅲ) was,the greater the nonylphenol degradation rate was. Under the same illumination condition,the complex system of humic acid and iron ions showed stronger degradation effect,the degradation ability is NP + HA +Fe( Ⅲ) > NP + Fe( Ⅲ) > NP + HA > NP in the order. Lowconcentration of Cu( Ⅱ) can stimulate the nonylphenol’s photodegradation. When the concentration of Cu( Ⅱ) exceeded 0. 3 mmol/L,it would weaken the nonylphenol’s photodegradation. When Cu( Ⅱ) coexisted with humic acid,they can promoted the degradation of nonylphenol,the degradation ability is NP + HA + Cu( Ⅱ) > NP+ Cu( Ⅱ) > NP + HA > NP in the order.更多还原