import {environment} from "../environments/environment";
...

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        ...
        LibraryModule.forRoot(environment)
    ],
    bootstrap: [AppComponent]
})
export class AppModule {
}

@NgModule({
    ...
})
export class LibraryModule {

    public static forRoot(environment: any): ModuleWithProviders {

        return {
            ngModule: LibraryModule,
            providers: [
                ImageService,
                {
                    provide: 'env', // you can also use InjectionToken
                    useValue: environment
                }
            ]
        };
    }
}

@Injectable()
export class ImageService {

    constructor(private http: Http, @Inject('env') private env) {
    }

    load(): Observable<any> {
        // assume apiUrl exists in you app's environment:
        return this.http.get(`${this.env.apiUrl}/images`)
            .map(res => res.json());
    }

}