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�S��,��r(n��ng)�I(y��)��Ѹ�ٰl(f��)չ,��ڭh(hu��n)��ȾӰ푳��й�ˮ��¹��l�l(f��),��o��ˮ��ȫ��ˇ�(y��n)��{,��l(f��)ȫ��ĸ߶��P(gu��n)ע[1-2],��ˮ�к��е��Ⱦ��鏊(qi��ng)��°���ҿ��ǰ�Ѫ��²��֮һ[3],��Ї��ˮ�l(w��i)��(bi��o)��(zh��n)��Ҏ(gu��)��,��ˮ�е��ֵ��0.02 mg/L[4]��ԇ�(y��n)��(j��)ˮ��ډA�ԗl��µĿɳ��,��û��W(xu��)��͏�(qi��ng)��(li��n)�ü��g(sh��)��ˮԴˮ�е��M(j��n)��ȥ��̎��,��ԁ�ˮ�S��(y��ng)��ͻ�l(f��)ˮԴ��Ⱦ�ṩ��g(sh��)��(j��)��

1 ԇ�(y��n)��

1.1 ԭˮˮ�|(zh��)

�|��ˮԴˮ,��pH ��7.0~7.2,��Ȟ�23.4~67.8 NTU��A�Ȟ�22.3~30.1 mg/L,��1.87~2.31 mg/L,��懘�(bi��o)��(zh��n)ԇ��(20 mg/L)��Ƴ�ԇ�(y��n)��ˮ,��

1.2 ��Ҫ��(xi��ng)Ŀ��

pH��pH Ӌ(j��),��ȣ�ɢ��ȃx��懣�늸��ϵ��x��w�|(zh��)�V(ICP-MS),��

1.3 ԇ�(y��n)��

��ȡ1 Lԇ�(y��n)��ˮ��1 L��,��0.1 mol/LHCl ��0.1 mol/LNaOH �A(y��)��{(di��o)��(ji��)pH��Ͷ�Ӿۺ��Ȼ��X��,��o��30 min ��,��ȡ��Һ��ICP-MS �y��ˮ懝�ȡ,��^�̲��(li��n)��ԇ�(y��n)��C(j��),��1��ʾ��

��1 ��

Tab.1 Mechanical process of coagulation and sedimentation

2.1 pH ��̎��Ч��Ӱ�

�ږ|��ԭˮ�м��懘�(bi��o)��(zh��n)ԇ��,��Ƴɝ�ȷքe��0.04mg/L,��0.10 mg/L ��ԇ�(y��n)��ˮ��{(di��o)��(ji��)pH ��7.0~10.0 ֮�g,��Ͷ��1.2 mg/L �ۺ��Ȼ��X(��Al2O3 Ӌ(j��)),��y��ˮ��ʣ��懝�ȣ��Y(ji��)��D1 ��ʾ,��

�D1 pH ��ˮ懝�ȵ�Ӱ�

Fig.1 Influence of pH on nickel concentration in outflow

�ĈD1 ��Կ��,��S��pH ��ߣ��ˮ��懝�ȳʬF(xi��n)�½��څ��,��ȥ��S��pH ��߶��,��(d��ng)ԭˮ��懝�Ȟ顶��ˮ�l(w��i)��(bi��o)��(zh��n)��ֵ��2 ��r(sh��)��Ͷ��1.2 mg/L�ۺ��Ȼ��X��Ҫ��pH �{(di��o)��(ji��)��10.0,��ˮ��ȥ��ֵ��,��ԭˮ懝�Ȟ��ֵ5 ��r(sh��)��ʹ�{(di��o)��(ji��)pH ��10.0,��ˮ懝��Գ��^��ֵ,��

2.2 ��Ͷ��̎��Ч��Ӱ�

��l��׃��r�£�懵�ȥ��S��pH ��߶��,��pH ��{(di��o)��Խ��Խ��,��ˮ�S��(sh��)�H��r��f��pH �{(di��o)��^��,��H��Ч��׃��,��Ҍ��pH �Ļ��{(di��o)Ҳ�^��y��ڽ�(j��ng)��(j��)�ͼ��g(sh��)�϶��ǲ��е�,��ˮԴͻ�l(f��)��Ⱦ�¼��,��(y��ng)�C�Ͽ��]pH �ͻ��Ͷ��Ķ��ف��x��ѵ�pH��ԇ�(y��n)�Y(ji��)��Ļ��A(ch��)��,��x��Ч��^��@��pH(9.0,��9.5��10.0),��{(di��o)��(ji��)�ۺ��Ȼ��XͶ��1.2~3.6 mg/L,��_��ԭˮ��懳��^��ֵ��ͬ��(sh��)�r(sh��)��Ͷ��

2.2.1 pH ��9.0 �r(sh��),��{(di��o)��(ji��)��Ͷ��

�{(di��o)��(ji��)ԭˮpH ��9.0,��׃�ۺ��Ȼ��X��Ͷ��y��ˮ��ʣ��懝��,��Y(ji��)��Ҋ�D2,��

�D2 pH ��9.0 ��ˮ懝��׃��

Fig.2 Variation curve of nickel concentration in outflow when pH is 9.0

�ĈD2 ��Կ��ַ��(y��ng)ǰpH ��9.0,��ˮ懝��S��Ӷ��,��ȥ��S��Ӷ��,��(d��ng)ԭˮ��懝�Ȟ��ֵ��2 ��r(sh��),��Ͷ��1.8 mg/L�ۺ��Ȼ��X��Ԍ��ˮ��懝�Ƚ��ֵ��¡��(d��ng)ԭˮ��懝�Ȟ��ֵ��5 ��r(sh��),��ӻ��Ͷ��懵�ȥ��߲��@,��Ͷ��3.6 mg/L �ۺ��Ȼ��X��ˮ��懝��0.0448 mg/L,��

2.2.2 pH ��9.5 �r(sh��),��{(di��o)��(ji��)��Ͷ��

�{(di��o)��(ji��)ԭˮpH ��9.5��׃�ۺ��Ȼ��X��Ͷ��y��ˮ��ʣ��懝��,��Y(ji��)��Ҋ�D3,��

�D3 pH ��9.5 ��ˮ懝��׃��

Fig.3 Variation curve of nickel concentration in outflow when pH is 9.5

�ĈD3 ��Կ��(y��ng)ǰpH ��9.5,��ˮ懝��S��Ӷ��,��(d��ng)ԭˮ��懝�Ȟ��ֵ��2 ��r(sh��)��Ͷ��1.8 mg/L �ۺ��Ȼ��X��Ԍ��ˮ��懝�Ƚ��ֵ��,��(d��ng)ԭˮ��懝�Ȟ��ֵ��5 ��r(sh��),��ӻ��Ͷ��懵�ȥ��߲��@��Ͷ��3.6 mg/L �ۺ��Ȼ��X,��ˮ��懝��0.02468 mg/L,��

2.2.3 pH ��10.0 �r(sh��)��{(di��o)��(ji��)��Ͷ��

�{(di��o)��(ji��)ԭˮpH ��10.0,��׃�ۺ��Ȼ��X��Ͷ��,��y��ˮ��ʣ��懝�ȣ��Y(ji��)��Ҋ�D4,��

�D4 pH ��10.0 ��ˮ懝��׃��

Fig.4 Variation curve of nickel concentration in outflow when pH is 10.0

�ĈD4 ��Կ��,��(y��ng)ǰpH ��10.0��(d��ng)ԭˮ��懝�Ȟ��ֵ��5 ��r(sh��),��Ͷ��2.4 mg/L �ۺ��Ȼ��X��Ԍ��ˮ��懝�Ƚ��ֵ��,��

3 �Y(ji��)Փ

��û��W(xu��)��͏�(qi��ng)��(li��n)�ü��g(sh��)��Чȥ��ˮԴˮ�е�懣��{(di��o)��(ji��)ԭˮpH ��9.0,��Ͷ��1.8 mg/L �ۺ��Ȼ��X,��Ԍ��ֵ��2 ��ȥ��_(d��)��(bi��o)��Ҫʹ��ֵ��5 ��ȥ��_(d��)��(bi��o),��Ҫ�{(di��o)��(ji��)ԭˮpH ��10.0,��Ͷ��2.4 mg/L �ۺ��Ȼ��X��

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[2]��Q��ͻ�l(f��)��ˮ��Ⱦ�¼��軯��ȥ��о�[J]��ˮ̎��g(sh��),��2009,��35(3)��27-29��

[3]��꣬�O�P��c��w��[J]��Ԫ��t(y��)�W(xu��),��2006,��13(3)��39-42��

[4]��A��񹲺͇��l(w��i)��ˮ�l(w��i)��(bi��o)��(zh��n)[S]��2006��4��

(��īI(xi��n)��ʽ��ͣ��С��W(xu��)��ȥ��ˮ��Ⱦ��ԇ�(y��n)�о�[J]��V�|��,��2011,��38(4)��81-82)

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