It is possible to remove small areas of black mold yourself, if you are very careful.  Be sure to call in the professionals to remove larger areas of infestation.  Always wear adequate protective clothing, including gloves and face masks.  It is extremely dangerous to breathe in the mold spores.  Remember that in addition to removing the mold you can see, you will also have to locate its source and where it might be hidden.  Here are some tips for removing black mold.

Identify the damp areas – The first step is to locate the problem and where the moisture is coming from in the first place.  Anywhere moisture is allowed to accumulate is a perfect breeding ground for mold.

Preventing mold from spreading – As you are working, be sure to seal off the room, this prevents the mold from spreading.  In addition it is a good idea to keep dust levels down to prevent the dust from spreading.

Removing the black mold – Thoroughly clean the affected area with a solution that is specific for killing and cleaning black mold.  The mold may also be living in area where you can’t see it, so it important to clean all visible surfaces.

Once the area is clean it is important to dispose of the contaminated materials you used to clean.   Place the pieces in heavy duty plastic bags and keep them outside until they can be disposed of properly.

Source:  http://roofjack.co.cc/dryer-vent-pipe/toxic-black-mold-removal-doing-it-yourself