I am so sorry that you are finding your new job less than a happy situation,and my advice would be to carry on regardless.
Your colleague is obviously not a happy person , and there could be many reasons for this.
She may be be very apprehensive about your arrival with regard to her own position for example.
She may already be aware that you are a more competent,
nurse than she is.
There are 100's of reasons why she may not like you.
She may be a totally nasty person and there is nothing you can do about that.
However, don't let her drive you out, that way she has won and got rid of you.
The NHS needs good nurses, so try to be as pleasant to her as you can in your professional dealings, be careful what you say to others at the moment, and get on with your job in a professional way.
When she finds that she is not upsetting youI am sure that someone else may become her target.
Your duty and that which you are getting paid for is to provide the best care possible for your patients, so don't waste your energy on this colleague.
When you are more established in your post you may find that you are not the only one to suffer in this way.
However in a situation where her attitudeand behaviour puts others at risk you need to document this ,and bring the matter to the attention of the ward manager, making her aware that your complaint is not frivolous in nature and that you have documented the whole thing for your own protection.
Do not keep anything written at your work place!!!!!
Hope this helps , the very best of luck in the future.