���������������Ӧ�����ɶ������ͱ�����������Ҳ�ǵ���ˮ��Ⱦ���������ɻ�����ǿ�����ԣ����Խ��ⱽ���������������Ի�������β�����������ɻ�������ȥ�������������о��˶�����Ũ�ȡ���������Ũ�ȡ�������ʼŨ�ȡ���ϵ��ʼ pH����Ӧ�¶ȵ����ضԶ��������������ȥ��ˮ�б�������Ч�ʵ�Ӱ�졣�������: ��) Fe²⁺ ������������� SO^-4 ·�ܿ��ٲ���Ч�������ⱽ��������Ŀ��Ũ��Ϊ 1 000 mg/L �ı������ԣ� Fe²⁺ Ũ��Ϊ 3. 3 mmol/L��Na₂S₂O₈ Ũ��Ϊ 4. 4 mmol/L ʱ���Ա����нϼѽ���Ч���������Ľ�����Ϊ 86. 33%������ϵ�Խϵ�Ũ�ȵı�������Ч���Ϻã�����Ⱦ���ʼŨ���� 1 000 mg/L ���͵� 500 mg/L �� 100 mg/L ʱ�������������� 86. 33% ����Ϊ 90. 27%�� 97.16%���۳�ʼ pH �Ա����Ľ�����Ӱ��ϴ����������� ( pH = 7 ����) �����ʽϺã��߳�ʼ pH ( pH =9�� 11) �͵ͳ�ʼ pH ���� ( pH =3��5) �¾��������������±����Ľ���Ч�ʡ�����ϵ���¶ȱ仯�Խ�����Ӱ�첻���ԡ�

The products of the reaction between zero- valent iron and nitrobenzene are Fe 2 + and aniline��while aniline is the groundwater contaminant�� Sulfate free radicals can degrade aniline with its strong oxidability��and they can be produced by persulfate activated by  Fe²⁺�� The authors studied the influences of some factors such as the initial concentrations of  Fe²⁺�� sulfate and aniline�� pH and temperature�� which were investigate to affect the aniline degradation�� The results indicate that: �� Sulfate free radicals produced by persulfate activated with  Fe²⁺ �� can oxidized and degrade the target pollutant aniline fastly and effectively��The optimum degradation rate of aniline reached 86. 33% under the condition of 3. 3 mmol/L  Fe²⁺��4. 4 mmol/L PS and 1 000 mg/L aniline�� ��Low concentrative aniline was degraded more effectively in the system�� The degradation rates of aniline increased from 86. 33% to 90%. 27% when the initial concentrations of the contaminant reduced from 1 000 mg/L to 500 mg/L�� and it increased to 97. 16% when the concentration of aniline was 100 mg/L�� �� Initial pH had a great impact on the aniline degragation��as the degragation rate was higher under the neutral condition (around pH =7) than the alka- line (pH =9�� 11) or acidic (pH =3��5) conditions�� �� The effect of the temperature in the system on the degra- dation rate was not notable��