The degradation rate of Atrazine by HB-5 is higher than by immobilized HB-5 under pH8.0, but it is opposite under pH5.0. The experiment results indicated that immobilized HB-5 enhanced the ability of tolerance of adversity.

• pH8.；0时；细菌HB-5对莠去津的降解要高于固定化HB-5对莠去津的降解；而pH5