Preparation method of adsorbent for removing phosphorus and heavy metal anions in water as well as application method
An adsorbent and heavy metal technology, applied in the field of magnetic water hyacinth biochar preparation, can solve the problem of high cost and achieve the effect of low cost, stable performance and low price
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Embodiment 1
[0020] Embodiment 1: adopt the following steps to implement the invention:
[0021] 1. Pre-treatment of water hyacinth: remove impurities from water hyacinth collected in unpolluted waters and air-dry it. After air-drying, place it in a blast drying oven at 60°C for overnight drying, crush it to 1-2mm, and put it into a self-sealing tape Store in a dry box for later use.
[0022] 2. Prepare iron solution: prepare a mixed solution of ferrous chloride and ferric chloride solution in a ratio of 1:1, each using 1M.
[0023] 3. Water hyacinth loaded with iron: according to the ratio of water hyacinth and iron solution 1:15 (W / V), take one part by weight of water hyacinth powder, pour it into the iron solution, stir well, and mix. And add 5M sodium hydroxide solution dropwise to adjust the pH value to ≈10, stir thoroughly for half an hour to one hour, then check the pH, if the pH changes, adjust it back to about 10. Filter or centrifuge the mixture, and bake in a vacuum oven at 60...
Embodiment 2
[0027] The method for preparing magnetic water hyacinth biochar as described in Example 1, the difference is that in the second step, iron solution is configured, and the concentrations of ferrous chloride and ferric chloride are both 0.5M.
Embodiment 3
[0029] The magnetic water hyacinth biochar preparation method as described in Example 1, the difference is that in the second step, iron solution is configured, and the concentrations of ferrous chloride and ferric chloride are both 0.1M.
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