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The influences of pH value on Pb(II) removal by the biopolymer extracted from activated sludge were investigated from various perspectives, including removal rate, functional groups, binding site number between the biopolymer and Pb(II), and removal distribution. With the system pH value rising from 4.0 to 9.0, the total removal rate of Pb(II) without and with adding the biopolymer increased from...
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