泥煤对镍离子的吸附特性

Adsorption for nickel ion on peat

通过试验不同量泥煤在不同pH溶液中溶液pH的前后变化,不同pH下泥煤吸附镍阳离子后溶液pH变化以及不同pH下溶液紫外吸收变化对比,结果表明泥煤具有一定缓冲性,不能仅以溶液酸度变化来证明泥煤吸附镍离子的机理,泥煤可能以2种方式吸附镍:pH大于4,吸附镍以离子交换为主,pH小于4,以物理吸附为主。

The change of pH of peat in solutions of different pH is studied. The experiments show that the mechanics of adsorption on peat cannot be determined by the pH change of solution of peat by means of different quantity and different pH peat solution and peat acts as a buffer agent. There are two adsorption mechanisms for nickel onto peat. The ion exchange dominates the adsorption of nickel onto peat when above pH 4, however physical surface adsorption does when below pH 4.