Method for dynamic adsorption of hexavalent chromium ion by squid ink melanin
A hexavalent chromium ion and dynamic adsorption technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., can solve the problems of low efficiency and cumbersome steps, and achieve high efficiency, simple process steps, Continuous and operable effects
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Embodiment 1
[0023] A method for the dynamic adsorption of hexavalent chromium ions by squid ink melanin, comprising the following steps:
[0024] (1) Preparation of adsorption column: a number of holes with a diameter of 90 μm are opened at the bottom, and a plastic test tube with a specification of 0.9*13 cm is filled with squid ink melanin powder to obtain an adsorption column, wherein the opening density of the holes is 80 / cm 2 , the filling amount of squid ink melanin powder in the plastic test tube is 1.3cm 3 , the particle size of squid ink melanin powder is 120 mesh.
[0025] (2) Dynamic adsorption: adjust Cr 6+ The mass concentration is 100μg / mL of Cr 6+ solution pH to 3, the Cr 6+ After the solution was heated to 20°C and kept for 30 minutes, the Cr 6+ The solution passes through the adsorption column in step (1) at a speed of 2mL / min, and the eluate is collected in groups of 30mL, and the Cr of each group of eluate is determined. 6+ mass concentration and calculate Cr 6+...
Embodiment 2
[0028]A method for the dynamic adsorption of hexavalent chromium ions by squid ink melanin, comprising the following steps:
[0029] (1) Preparation of adsorption column: a number of holes with a diameter of 95 μm are opened at the bottom, and a plastic test tube with a specification of 0.9*13 cm is filled with squid ink melanin powder to obtain an adsorption column. The opening density of the holes is 70 / cm 2 , the filling amount of squid ink melanin powder in the plastic test tube is 1.34cm 3 , the particle size of the squid ink melanin powder is 130 mesh.
[0030] (2) Dynamic adsorption: adjust Cr 6+ The mass concentration of Cr is 110μg / mL 6+ solution pH to 3.5, the Cr 6+ After the solution was heated to 22°C and kept for 25 minutes, the Cr 6+ The solution passes through the adsorption column in step (1) at a speed of 2.5mL / min, and the eluate is collected in groups of 30mL, and the Cr of each group of eluate is determined. 6+ mass concentration and calculate Cr 6+...
Embodiment 3
[0033] A method for the dynamic adsorption of hexavalent chromium ions by squid ink melanin, comprising the following steps:
[0034] (1) Preparation of adsorption column: a number of holes with a diameter of 100 μm are opened at the bottom, and squid ink melanin powder is filled in a plastic test tube with a specification of 0.9*13 cm to obtain an adsorption column. The opening density of the holes is 60 / cm 2 , the filling amount of squid ink melanin powder in the plastic test tube is 1.5cm 3 , the particle size of the squid ink melanin powder is 140 mesh.
[0035] (2) Dynamic adsorption: adjust Cr 6+ The mass concentration is 120μg / mL of Cr 6+ solution pH to 4, the Cr 6+ After the solution was heated to 25°C and kept for 20 minutes, the Cr 6+ The solution passes through the adsorption column in step (1) at a speed of 3mL / min, and the eluate is collected in groups of 30mL, and the Cr of each group of eluate is determined. 6+ mass concentration and calculate Cr 6+ Clea...
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