Dear Sir. Concerning your issue about the method of preparation of rice husk (or any better) biochar for nitrate removal from drinking water . Rice husk biochar was prepared by slowly pyrolyzing at 500 °C, 2 h. The rice husk and its biochar were modified by cetyltrimethylammonium bromide or sodium dodecylbenzenesulfonate. FTIR, BET and zeta potential measurements were used to characterize the obtained adsorbents. Slow pyrolysis increased the specific surface area and decreased the surface charge of rice husk while surfactant clogged the pore but could change the charge of a surface. Adsorption of both ammonium and nitrate on rice husk, its biochar, and their modification with surfactants fitted Freundlich and Langmuir isotherms, indicating heterogeneity in adsorption. Slow pyrolysis gave the highest ammonium removal with maximum adsorption capacity of 44 mgN/g and it was a physical process. The cetyltrimethylammonium bromide modification gave a significant nitrate removal on both rice husk and its biochar with maximum adsorption of 278 and 213 mgN/g, respectively, which is higher than a commercial adsorbent. These two modification techniques gave great adsorption enhancement with cost-effectiveness as compared to other reviewed methods which could use as a nitrogen-rich fertilizer and fertilizer retainment in crop production. I think the following below links may help you in your analysis:
https://link.springer.com/content/pdf/10.1007%2Fs40093-018-0200-3.pdf
Thanks
https://www.sciencedirect.com/search?qs=Biochar%20for%20Nitrate%20Removal%20from%20Drinking%20Water&show=25&sortBy=relevance
It is not a big deal. Numerous literature are there to guide you. However, you should sieve the rice husk after collecting it. After that wash it with distilled water to remove all kind of dirt and grit. After drying it place a certain amount of the clean rice husk in a crucible (with lid) and keep it in a muffle furnace and pyrolyse it at 500-550 degree C for 2 h. Collect the resulted material only when the crucible cools down enough that on opening the lid, the residual pyrolysed rice husk does not catch fire.
- Badges
- Science topic
- Similar topics
- Methodology
- Research Methodology
- Research Papers