Claims
- 1. A method for removing dissolved heavy metal ions from water containing the same, which comprises contacting said water with a formaldehyde-modified nut waste, said nut waste being selected from the group consisting of nut hulls, skins, woody shells, expeller meals, and pellicles.
- 2. The method of claim 1 wherein the nut waste is peanut skins.
- 3. A method for removing dissolved heavy metal ions from water containing the same, which comprises contacting said water with formaldehyde-modified nut waste, said nut waste being selected from the group consisting of nut hulls, skins, woody shells, expeller meals, and pellicles, and being modified by reaction with 15-20% formaldehyde, based on the weight of nut waste, at 50.degree.-70.degree. C. for 2-3 hours under acidic conditions.
- 4. The method of claim 3 wherein the nut waste is peanut skins.
Parent Case Info
This is a division of our copending application, Ser. No. 495,018, filed Aug. 5, 1974, now U.S. Pat. No. 3,925,192.
US Referenced Citations (3)
| Number |
Name |
Date |
Kind |
| 2831022 |
Van Blaricom et al. |
Apr 1958 |
|
| 3719473 |
Waiss et al. |
Mar 1973 |
|
| 3725261 |
Friedman |
Apr 1973 |
|
Divisions (1)
|
Number |
Date |
Country |
| Parent |
495018 |
Aug 1974 |
|
Patent Grant
3944415
